Voltage Monitors and Phase Monitors
3-Phase Voltage Monitors
WVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
DLMU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
HLMU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
PLMU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113
PLM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114
TVW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115
TVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
Low Volts, Phase Reversal
PLR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Phase Reversal
PLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
1-Phase Voltage Monitors
HLV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119
KVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120
www.ssac.com • 800-843-8848 • fax: 605-348-5685
Voltage Monitors & Phase Monitors
Series Included
109
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
Voltage Monitors
WVM Series
The WVM Series provides protection against
premature equipment (motor) failure caused by
voltage faults on the 3-phase line. The WVM’s
microcontroller design provides reliable protection
even if regenerated voltages are present. It
combines dependable fault sensing with a 10
fault memory and a 6 LED status display. Part
instrument, part control, the WVM protects your
equipment when you’re not there and displays
what happened when you return. The WVM
is fully adjustable and includes time delays to
prevent nuisance tripping and improve system
operation. Time delays include a 0.25 to 30s
adjustable trip delay, an adjustable 0.25 to 64m
(in 3 ranges) restart delay, plus a unique 3 to 15s
true random start delay. The random start delay
prevents voltage sags caused by simultaneous
restarting of numerous motor loads after a power
outage .
For more information see:
Appendix B, page 166, Figure 15 for dimensional drawing.
Appendix C, page, 168, Figure 10 for connection diagram.
Features:
• Protects against phase loss & reversal; over,
under & unbalanced voltages; & short
cycling
• 10 fault memory & status displayed on 6
LED readout
• Switch selectable automatic restart, delayed
automatic restart, & manual reset
• Isolated, 10A, SPDT output contacts
• ASME A17.1 Rule 210.6
• NEMA MG1 14:30, 14:35
• IEEE C62.41-1991 Level B
Approvals:
Auxiliary Products:
• 3-phase fuse block/disconnect:
P/N: FH3P
• 2 Amp fuse: P/N: P0600-11
• DIN rail: P/N: C103PM (Al)
Available Models:
Operation
WVM911AL
WVM011AL
The output relay is energized when all conditions are acceptable and the WVM is reset. A restart and/or random start
WVM911AL-60
WVM611AH
delay may occur before the output relay is energized.
WVM911RL
WVM611AL
Field Adjustment: Select the line voltage listed on the motor’s name plate. This automatically sets the over and undervoltage
WVM911RN-60
WVM811AH
trip points. No further adjustment should be required to achieve maximum equipment protection.
WVM911AH
Read Memory: Fault(s) stored in the memory are indicated when the yellow LED is flashing, up to 10 faults are noted.
If desired part number is not listed, please call us to
Memory Reset: To clear the memory of all faults stored, rotate selector to Clear Memory for 5 seconds. The yellow
LED will turn off.
see if it is technically possible to build .
Memory Overload: Only the 10 most recent faults are retained.
Random Start Delay: A new 3 to 15s random start delay is selected by the microcontroller when a fault is corrected and when the operating voltage (L1, L2, L3) is applied to the WVM. A
random start delay does not occur when the reset is manual.
Automatic Restart: Upon fault correction, the output will re-energize after a random start delay.
Automatic Restart Upon Fault Trip: When a fault is sensed for the full trip delay, the output de- energizes and a restart delay is initiated. This delay locks out the output for the delay period.
Should the fault be corrected by the end of the restart delay, the output will re-energize after a random start delay. A restart delay will also occur when operating voltage (L1, L2, L3) is
applied to the WVM.
Manual Reset: After a fault condition is corrected, the WVM can be manually reset. There are two methods; a customer supplied remote switch, or the onboard selector switch.
Manual Reset (Onboard): Rotate selector switch from the Manual Reset position to Auto Restart w/ Delay then back again to Manual Reset within 3 seconds. The output will immediately
energize.
Remote Reset: Reset (Restart) is accomplished by a momentary contact closure across terminals 1 & 2. The output will immediately energize. Remote switch requirements are ≥10mA @ 20VDC
and the reset terminals are not isolated from line voltage. A resistance of ≤20KΩ across terminals 1 & 2 will cause immediate automatic restart.
Automatic Restart Upon Fault Correction: (P/N includes an R)
When a fault is sensed for the full trip delay, the output relay de-energizes. Upon correction of the fault, a restart delay begins. At the end of this delay, the output will re-energize after a
random start delay. If a fault occurs during restart timing, the restart time delay will be reset to zero, and the output will not energize until the restart delay is completed.
Order Table:
WVM
X
3-Phase Line Voltage
─6 - 200-240VAC
─8 - 355-425VAC
─9 - 400-480VAC
─0 - 500-600VAC
X
Unbalance
─1 - 2-10%
X
Trip Delay
─1 - 0.25-30s
X
Reset Method
─A - Switch Selectable:
Automatic restart upon
fault trip
─R - Swith Selectable:
Automatic restart upon
fault correction
X
Restart Delay
─L - 0.25-64s
─N - 6-300s
─H - 0.25-64m
-60 Option: Add the suffix -60 to any automatic
restart part number to remove the random start
delay feature.
Specifications
Line Voltage
Type . . . . . . . . . . . . . . . . . 3-phase delta or wye with no connection to neutral
Operating Voltage
Model
Adj. Line Voltage Range
240
200-240VAC
380
355-425VAC
480
400-480VAC
600
500-600VAC
AC Line Frequency . . . . . . . . . . . . . . . . . . . . . 50/60 Hz
Overvoltage, Undervoltage, & Voltage Unbalance
Overvoltage Trip Point . . . . . . . . . . . . . . . . . . 109-113% of adjusted voltage
Reset Voltage . . . . . . . . . . . . . . . . . . . . . . . . -2% of trip point
Undervoltage Trip Point . . . . . . . . . . . . . . . . . 88-92% of adjusted voltage
Reset Voltage . . . . . . . . . . . . . . . . . . . . . . . . +2% of trip point
Voltage Unbalance . . . . . . . . . . . . . . . . . . . . . . Adjustable from 2-10%*
Trip Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjustable from 0.25 - 30s ±15%
Phase Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥ 15% unbalance
Response Time . . . . . . . . . . . . . . . . . . . . . . . . ≤ 200 ms
Random Start Delay Range . . . . . . . . . . . . . . 3 - 15s
Reset (Restart) Delay
Low Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25-64s ±15%
Normal Range . . . . . . . . . . . . . . . . . . . . . . . . . 6-300s ±15%
High Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25-64m ±15%
110
Fault Memory
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nonvolatile RAM
Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stores last 10 faults
Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . 6 LEDs provide existing status & memory readout
Note: 50% of operating line voltage must be applied to L1 & L2 for operation of status indicators
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electromechanical relay
Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Isolated, SPDT
Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10A resistive @ 250VAC; 6A inductive (0.4 PF) @ 250VAC
Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical - 1 x 107
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IEEE 62.41-1991 Level B
Isolation Voltage . . . . . . . . . . . . . . . . . . . . . . . ≥ 2500V RMS input to output
Mechanical
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Surface with 2 or 4 #8 (M4 x 0.7) screws
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.9 x 4.4 x 2.4 in. (175.3 x 111.8 x 61.0 mm)
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . Screw terminals with captive wire clamps for up to
#12 AWG ( 3.2 mm2) wire
Environmental
Operating / Storage Temperature . . . . . . . . -40° to 65°C / -40° to 85°C
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅25 oz ( 709 g)
* Unbalance reset is 90% of the unbalance setting (i.e. VUB at 5% reset is 4.5%)
www.ssac.com • 800-843-8848 • fax: 605-348-5685
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
Voltage Monitors
DLMU Series
The DLMU Series is a universal voltage, 3-phase
voltage monitor. It continuously measures
the voltage of each of the three phases with
microcontroller accuracy and compares the value
to preset trip points. It separately senses phase
reversal and loss; over, under and unbalanced
voltages; and over or under frequency. Protection
is assured during periods of large average voltage
fluctuations or when regenerated voltages are
present. The unit trips within 200ms when phase
loss is detected. Adjustable time delays are
included to prevent nuisance tripping and short
cycling of sensitive equipment. The isolated,
10A, SPDT and 2A alarm output relay contacts
trip when a phase voltage exceeds the trip limits
for the trip delay. Nominal line voltage, voltage
unbalance, and time delays are knob adjustable.
The phase loss setpoint and the acceptable
frequency range are fixed. Both delta and wye
systems can be monitored; no connection to
neutral is required .
For more information see:
Appendix B, page 166, Figure 16 for dimensional drawing.
Appendix C, page 168, Figure 11 for connection diagram.
Features:
• Protects against phase & reversal; over,
under & unbalanced voltages; & over &
under frequency
• 35mm DIN rail or surface mounting
• Isolated, 10A, relay contacts
• Isolated, 2A, NO or NC, SPST relay contact
• LED indicates relay, faults, & time delays
• Universal line voltage 240 to 480VAC
• 600VAC version available
• 3-wire connection for delta or wye systems
• ASME A17.1 rule 210.6
• NEMA MG1 14:30, 14:35
• IEEE C62.41-1991 Level B
Approvals:
Auxiliary Products:
• 3-phase fuse block/disconnect:
P/N: FH3P
• 2 Amp fuse: P/N: P0600-11
• DIN rail: P/N: C103PM (Al)
Operation
Upon application of line voltage, the output is de-energized and the restart delay begins. If all the 3-phase voltages are
within the acceptable range, the output energizes at the end of the restart delay. The microcontroller circuitry automatically
Available Models:
senses the voltage range, and selects the correct operating frequency (50 or 60Hz). The over and undervoltage trip points
DLMHBRAAA
are set automatically. When the measured value of any phase voltage exceeds the acceptable range limits (lower or upper)
DLMUBNAAN
the trip delay begins. At the end of the trip delay the output relay de-energizes. If the phase voltage returns to an acceptable
DLMUBRAAA
value before the trip delay expires, the trip delay is reset and the output remains energized. Under, over, and unbalanced
voltages plus over or under frequency must be sensed for the complete trip delay before the unit trips. The unit trips in
If desired part number is not listed, please call us to
200ms when phase loss or reversal are sensed. The unit will not energize if a fault is sensed as the line voltage is applied.
see if it is technically possible to build .
Reset: Reset is automatic upon correction of the voltage or frequency fault or phase sequence.
Restart Delay Options:
L= Lockout or minimum OFF time. The restart delay begins when the output trips. The unit cannot be re-energized until the restart delay is complete. This provides a minimum off time or
lockout time to allow equipment sensitive to short cycling, time to reset. If the fault is corrected after the restart delay is complete the output energizes immediately. The restart delay also
occurs when line voltage is applied/reapplied.
R= Restart Delay on fault correction. The restart delay begins when line voltage is reapplied or when a voltage fault is corrected. This option is normally selected when staggered restarting
of multiple motors on a power system is required.
N= No Restart Delay. 0.6 second initialization delay on application of line voltage applies.
Restart Notes:
All restart options remain reset when the following conditions are detected:
1.) Phase loss (phase unbalance greater than 25%) 2.) Average line voltage less than 120VAC 3.) Phase reversal
The restart delay begins when the condition is corrected.
LED Operation
The LED flashes green during the restart delay, then glows green when the output energizes. It flashes red during the trip delay then glows red when the output de-energizes. It flashes red/
green if phase reversal is sensed If a fault is sensed during the restart delay, the LED will glow red during that portion or the full restart delay.
Order Table:
DLM
X
Line Voltage
─U - 200-480VAC
─H - 500-600VAC
X
Output
─B - SPDT & NO
─C - SPDT & NC
X
Restart Function
─L - Lockout, min off time
─R - Staggered restarting
─N - No Restart Delay
Specifications
X
Voltage Unbalance
─A - Adjustable 2-10%
─Fixed - Specify unbalance
2-10% in 1% increments
using two digits [04]
Line Voltage
Type . . . . . . . . . . . . . . . . . . . . . . . .3-phase delta or wye with no connection to neutral
Operating Voltage
200-480VAC
Range Voltage Adj.Range Line Frequency Line Voltage Max.
240
200-240VAC
50/60Hz
380
340-420VAC
50Hz
480
400-480VAC
60Hz
550VAC
600VAC
600
500-600VAC
50/60Hz
600VAC
AC Line Frequency . . . . . . . . . . . .50/60 Hz automatically detected
Phase Loss . . . . . . . . . . . . . . . . . . . .≥ 25% unbalance
Response Time . . . . . . . . . . . . . .≤200ms
Undervoltage & Voltage Unbalance
Type . . . . . . . . . . . . . . . . . . . . . . .Voltage detection with delayed trip & automatic reset
Overvoltage TripVoltage . . . . . .109 - 113% of the adjusted line voltage
Reset Voltage . . . .≅ -3% of the trip voltage
Undervoltage Trip Voltage . . . . .88 - 92% of the adjusted line voltage
Reset Voltage . . . .≅ +3% of the trip voltage
Voltage Unbalance . . . . . . . . . . . .Adjustable 2 - 10% or specify fixed unbalance of 2 - 10%
in 1% increments
Reset on balance . . .≅ -0.7% unbalance
Trip Delay Active On . . . . . . . . .Over/undervoltage, voltage unbalance, over/under frequency
Range . . . . . . . . . . . . .Adjustable from 1 - 30s or specify fixed delay 1 - 30s in 1s
increments
Tolerance . . . . . . . . . .± 15%
www.ssac.com • 800-843-8848 • fax: 605-348-5685
X
Trip Delay
─A - Adjustable 1-30s
─Fixed - Specify delay
1-30s in 1s increments,
using two digits [20]
X
Restart Delay
─A* - Adjustable 0.6-300s
─N - No Restart Delay
* Selection “A” is only available
for L or R Restart Functions
Restart Delay
Range . . . . . . . . . . . . Adjustable from 0.6 - 300s; if no restart delay is
selected a 0.6s initialization delay applies
Tolerance . . . . . . . . . ± 15%
Over/Under Frequency . . . . . . . . . . ±4%; Reset ±3%; 50/60 Hz
Phase Sequence . . . . . . . . . . . . . . . . . A, B, C, L1, L2, L3
Response Time -Phase Reversal & Phase Loss. . . . ≤200 ms
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . Isolated Electromechanical Relay
Rating . . . . . . . . . . . . . . . . . . . . . . . . . 10A resistive @ 240VAC; 8A resistive @ 277VAC;
NO-1/4 hp @ 120VAC; 1/3 hp @ 240VAC
Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical - 1 x 106; Electrical - 1 x 303
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . IEEE C62.41-1991 Level B
Isolation Voltage . . . . . . . . . . . . . . . . ≥ 2500V RMS input to output
Mechanical
Mounting . . . . . . . . . . . . . . . . . . . . . . Surface mount with 2 #8 (M4 x 0.7) screw or snap on
35mm DIN Rail
Note: 0.25 in.(6.35 mm) spacing between units or other devices is required
Dimensions . . . . . . . . . . . . . . . . . . . . . 4.33 x 2.95 x 1.97 in. (110 x 75 x 50 mm)
Termination . . . . . . . . . . . . . . . . . . . . Screw terminals with captive wire clamps for up to
#14 AWG (2.5 mm2) wire
Environmental
Operating / Storage Temperature . -40° to 60°C / -40° to 85°C
Humidity . . . . . . . . . . . . . . . . . . . . . . . 95% relative, non-condensing
Weight . . . . . . . . . . . . . . . . . . . . . . . . . ≅ 8.6 oz (244 g)
111
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
Voltage Monitors
HLMU Series
The HLMU Series is a universal voltage, encapsulated,
3-phase voltage monitor. It continuously measures
the voltage of each of the three phases with
microcontroller accuracy and compares the value to
preset trip points. It separately senses phase reversal
and loss; over, under and unbalanced voltages; and
over or under frequency. Protection is assured during
periods of large average voltage fluctuations, or when
regenerated voltages are present. The unit trips within
200ms when phase loss is detected. Adjustable time
delays are included to prevent nuisance tripping and
short cycling of sensitive equipment. The isolated,
10A, DPDT relay contacts trip when a phase voltage
exceeds the trip limits for the trip delay. Nominal line
voltage, voltage unbalance, and time delays are knob
adjustable. The phase loss setpoint and the acceptable
frequency range are fixed. Both delta and wye systems
can be monitored; no connection to neutral is required .
For more information see:
Appendix B, page 166, Figure 17 for dimensional drawing.
Appendix C, page 168, Figure 12 for connection diagram.
Features:
• Protects against phase loss & reversal; over,
under & unbalanced voltages; & over &
under frequency
• Encapsulated circuitry
• Isolated, 10A, DPDT output contacts
• LED indicates relay status, faults, & time
delays
• Universal line voltage 200 to 480VAC in
one unit
• Compact design
• Finger-safe terminal blocks, up to 12 AWG
• ASME A17.1 rule 210.6
• NEMA MG1 14:30, 14:35
• IEEE C62.41-1991 Level B
Approvals:
Auxiliary Products:
• 3-Phase fuse block/disconnect:
P/N: FH3P
Operation
• 2 Amp fuse: P/N: P0600-11
Upon application of line voltage, the output is de-energized and the restart delay begins. If all the three-phase voltages
• DIN rail: P/N: C103PM (Al)
are within the acceptable range, the output energizes at the end of the restart delay. The microcontroller circuitry
automatically senses the voltage range, and selects the correct operating frequency (50 or 60Hz). The over and under
• DIN rail adaptor: P/N: P1023-20
voltage trip points are set at ± 10% of the adjusted line voltage. When the measured value of any phase voltage exceeds the
acceptable range limits (lower or upper) the trip delay begins. At the end of the trip delay the output relay de-energizes.
Available Models:
If the phase voltage returns to an acceptable value before the trip delay expires, the trip delay is reset and the output
HLMUDRAAA
HLMUDLAAA
remains energized. Under, over, and unbalanced voltages plus over or under frequency must be sensed for the complete
HLMUSR0604A
HLMUDN0405N
trip delay before the unit trips. The unit trips in 200ms when phase loss or reversal are sensed. The unit will not energize
HLMUDNAAN
if a fault is sensed as the line voltage is applied.
If desired part number is not listed, please call us to
Reset: Reset is automatic upon correction of the voltage or frequency fault or phase sequence.
see if it is technically possible to build .
Restart Delay Options:
L= Lockout or minimum OFF time. The restart delay begins when the output trips. The unit cannot be re-energized until the restart delay is complete. This provides a minimum off time
or lockout time to allow equipment sensitive to short cycling, time to reset. If the fault is corrected after the restart delay is complete, the output energizes immediately. The restart delay
also occurs when line voltage is applied/reapplied.
R= Restart Delay on fault correction. The restart delay begins when line voltage is reapplied or when a voltage fault is corrected. This option is normally selected when staggered restarting
of multiple motors on a power system is required.
N= No Restart Delay. 0.6 second initialization delay on application of line voltage applies.
Restart Notes:
All restart options remain reset when the following conditions are detected:
1.) Phase loss (phase unbalance greater than 25%) 2.) Average line voltage less than 120VAC 3.) Phase reversal
The restart delay begins when the condition is corrected.
LED Operation
The LED flashes green during the restart delay, then glows green when the output energizes. It flashes red during the trip delay then glows red when the output de-energizes. It flashes
red/green if phase reversal is sensed. If a fault is sensed during the restart delay, the LED will glow red during that portion or the full restart delay.
Order Table:
HLMU
X
Output
─D - DPDT
─S - SPDT
Specifications
X
Restart Function
─L - Lockout, Min Off Time
─R - Staggered Restarting
─N - No Restart Delay
X
Voltage Unbalance
─A - Adjustable 2-10%
─Fixed - Specify Unbalance
2-10% in 1% increments,
using two digits [04]
Line Voltage
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-phase delta or wye with no connection to neutral
Operating Voltage 200 - 480VAC
Range
Voltage Adj. Range
Frequency
240
200-240VAC
50 or 60Hz
380
340-420VAC
50Hz
480
400-480VAC
60Hz
Line Voltage Max. . . . . . . . . . . . . . . . . . . . 550VAC
AC Line Frequency . . . . . . . . . . . . . . . . . . 50/60 Hz automatically detected
Phase Loss
. . . . . . . . . . . . . . . . . . . . ≥ 25% unbalance
Response Time . . . . . . . . . . . . . . . . . . . . ≤200ms
Undervoltage & Voltage Unbalance
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage detection with delayed trip &
automatic reset
Overvoltage
Trip Voltage . . . . 109 - 113% of the adjusted line voltage
Reset Voltage . . . ≅ -3% of the trip voltage
Undervoltage
Trip Voltage . . . . 88 - 92% of the adjusted line voltage
Reset Voltage . . . ≅ +3% of the trip voltage
Voltage Unbalance
Trip Setpoint . . . . Adjustable 2 - 10% or specify fixed
unbalance of 2 - 10% in 1% increments
Reset on Balance ≅ -0.7% unbalance
Trip Delay
Active On . . . . . . Over/undervoltage, voltage unbalance,
over/under frequency
Range . . . . . . . . . . Adjustable from 1 - 30s or specify fixed
delay 1 - 30s in 1s increments
Tolerance . . . . . . . ± 15%
Restart Delay
Range . . . . . . . . . . Adjustable from 0.6 - 300s; if no restart
delay is selected a 0.6s initialization delay
applies
Tolerance . . . . . . . ± 15%
112
X
Trip Delay
─A - Adjustable 1-30s
─Fixed - Specify delay
1-30s in 1s increments,
using two digits [05]
X
Restart Delay
─A* - Adjustable 0.6-300s
─N - No Restart Delay *Selection “A” is only
available for Restart
Functions “L” and “R”
Over/Under Frequency . . . . . . . . . . . . . . . . . ±4%; Reset ±3%; 50/60 Hz
Phase Sequence . . . . . . . . . . . . . . . . . . . . . . . A, B, C, L1, L2, L3
Response Time-Phase Reversal & Phase Loss. . . . . . ≤200 ms
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Isolated Electromechanical Relay
Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DPDT
Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10A resistive @ 240VAC; 8A resistive @ 277VAC;
NO-1/4 hp @ 120VAC; 1/3 hp @ 240VAC
Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical - 1 x 106
Electrical (at 10A) - DPDT - 1 x 303
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IEEE C62.41-1991 Level B
Isolation Voltage . . . . . . . . . . . . . . . . . . . . . . . ≥ 2500V RMS input to output
Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Encapsulated
Mechanical
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Surface mount with one #10 (M5 x 0.7) screw
Note: 0.25 in.(6.35 mm) spacing between units or other devices is required
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 x 2 x 1.64 in. (76.7 x 51.3 x 41.7 mm)
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . Screw terminal connection up to
12 AWG (3.3 mm2) wire
Environmental
Operating / Storage Temperature . . . . . . . . -40° to 60°C / -40° to 85°C
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95% relative, non-condensing
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ 3.9 oz (111 g)
www.ssac.com • 800-843-8848 • fax: 605-348-5685
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
Voltage Monitors
PLMU Series
The PLMU Series continuously measures the
voltage of each of the three phases to provide
protection for 3-phase motors and sensitive loads.
Its microcontroller senses under and overvoltage,
voltage unbalance, phase loss, and phase reversal.
Protection is provided even when regenerated
voltages are present. Universal voltage operation
and standard base connection allows the PLMU
to replace hundreds of competitive part numbers.
For more information see:
Appendix B, page 166, Figure 18 for dimensional drawing.
Appendix C, page 168, Figure 13 for connection diagram.
Operation
Upon application of power, a 0.6s random start delay begins and the PLMU measures the voltage levels and line
frequency and selects the voltage range. The output relay is energized and the LED glows green when all voltages
are acceptable and the phase sequence is correct. LED flashes green during trip delay, glows red when output
de-energizes. Undervoltage, overvoltage, and voltage unbalance must be sensed for continuous trip delay before
the relay de-energizes. Re-energization is automatic upon fault correction. The output relay will not energize
if a fault condition is sensed as 3-phase input voltage is applied. The LED alternately flashes red/green when
phase reversal is sensed. Line voltage is selected with the knob, setting the over and under voltage trip points.
Voltage range is automatically selected by the microcontroller.
Features:
• Protects against phase & reversal; & over,
under & unbalanced voltages
• Octal plug-in
• Isolated, 10A, SPDT output contacts
• Operates from 200 to 480VAC
• LED indicator glows green when voltages are
acceptable, red for faults
• Indicates reverse-phase wiring
• Simple 3-wire connection for delta or wye
systems
• ASME A17.1 Rule 210.6
• NEMA MG1 14:30, 14:35
• IEEE C62.41-1991 Level B
Approvals:
Auxilary Products:
• Panel mount kit: P/N: BZ1
• 8-pin octal socket: P/N: OT08PC
• 3-phase fuse block/disconnect:
P/N: FH3P
• 2 Amp fuse: P/N: P0600-11
• DIN rail: P/N: C103PM (Al)
Available Models:
PLMU11
LED Indicator
Order Table:
Voltage Unbalance
Adjustable 2-10%
Trip Delay
Adjustable 0.25-30s
Part Number
PLMU11
Steady Green
Energized
Steady Red
De-engergized
(tripped on fault)
Flashing Green
Trip Delay
Alternate Flashing
Red/Green
Phase Reversal
Specifications
Line Voltage
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-phase delta or wye with no connection to
neutral
Line Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 to 480VAC ±15%, 50/60 Hz ±2 Hz
Adjustable Voltage Ranges
(Automatic Range Selection) . . . . . . . . . . . . 200 to 240VAC, 50/60 Hz
340 to 420VAC, 50 Hz
400 to 480VAC, 60 Hz
Maximum Voltage . . . . . . . . . . . . . . . . . . . . . . 552VAC
Phase Sequence . . . . . . . . . . . . . . . . . . . . . . . . . ABC
Overvoltage, Undervoltage, & Voltage Unbalance
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage detection with delayed trip & automatic
reset
Overvoltage & Undervoltage
Undervoltage Trip Point . . . . . . . . . . . . . . . 88 - 92% of adjusted line voltage
Reset Voltage . . . . . . . . . . . . . . . . . . . . . . . . . +2% of trip voltage
Overvoltage Trip Point . . . . . . . . . . . . . . . . 109 - 113% of adjusted line voltage
Reset Voltage . . . . . . . . . . . . . . . . . . . . . . . . . -2% of trip voltage
Voltage Unbalance Trip Point . . . . . . . . . . . . . Adjustable from 2 - 10%
Factory fixed from 4 - 10% (a minimum order
quantity applies)
Reset on Balance (%):
Selected Unbalance
2
3
4
5
6
7
8
9
10
Reset
1.5 2.5 3.5 4.5 5.4 6.3 7.2 8.1
9
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Trip Delay Range . . . . . . . . . . . . . . . . . . . . . . . . Adjustable from 0.25 - 30s
Factory fixed from 2 - 30s ±15%
(a minimum order quantity applies)
Severe Unbalance - 2X Selected Unbalance . 0.25 - 2s; disabled when the trip delay is less
than 2s
Random Start Delay . . . . . . . . . . . . . . . . . . . . . ≅ 0.6s
Phase Reversal & Phase Loss Trip Time . . . . ≤ 150ms
Phase Loss Setpoint . . . . . . . . . . . . . . . . . . . . . . ≥ 15% unbalance
Reset Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic
Output Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . Energized when voltages are acceptable
Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10A resistive @ 240VAC; 1/4 hp @ 125VAC;
1/3 hp @ 250VAC; max. 277VAC
Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical - 1 x 106 ; Electrical - 1 x 105
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IEEE C62.41-1991 Level B
Isolation Voltage . . . . . . . . . . . . . . . . . . . . . . . . ≥ 2500V RMS input to output
Mechanical
Mounting* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Plug-in socket rated 600VAC
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . Octal 8-pin plug-in
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.03 x 2.39 x 1.78 in. (77.0 x 60.7 x 45.2 mm)
Environmental
Operating / Storage Temperature . . . . . . . . . -40° to 60°C / -40° to 85°C
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ 8.6 oz (244 g)
*CAUTION: Select an octal socket rated for 600VAC operation.
113
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Voltage Monitors
PLM Series
The PLM Series continuously measures the voltage
of each of the three phases. The PLM Series
uses a microcontroller circuit design that senses
undervoltage, voltage unbalance, phase loss,
and phase reversal. Protection is assured when
regenerated voltages are present. Both delta and
wye systems can be monitored; no connection to
neutral is required .
For more information see:
Appendix B, page 165, Figure 8 for dimensional drawing.
Appendix C, page 168, Figure 13 for connection diagram.
Features:
• Protects against phase loss & reversal; &
under & unbalanced voltages
• 8-pin plug-in base
• Adjustable low voltage trip point
• Factory fixed unbalance & trip delay
• Line voltages 200 to 480VAC in 3 ranges
• Isolated, 10A, SPDT output contacts
• ASME A17.1 rule 210.6
• NEMA MG1 14:30, 14:35
• IEEE C62.41-1991 Level B
Approvals:
Auxiliary Products:
Operation
The output relay is energized and the LED glows green when all voltages are acceptable and the phase sequence
is correct. Under and unbalanced voltages must be sensed for a continuous trip delay period before the relay
de-energizes. Reset is automatic upon correction of the fault condition. The output relay will not energize if a
fault condition is sensed as power is applied. The LED flashes red during the trip delay, then glows red when
the output de-energizes. The LED flashes green/red if phase reversal is sensed.
Field Adjustment:
Set voltage adjustment knob at the desired operating line voltage for the equipment. This adjustment automatically
sets the undervoltage trip point. Apply power. If the PLM fails to energize, (LED glows red) check wiring of
all 3 phases, voltage, and phase sequence. If phase sequence is incorrect, the LED flashes green/red. To correct
this, swap any two line voltage connections at the mounting socket. No further adjustment should be required.
• Panel mount kit: P/N: BZ1
• Octal 8-pin socket: P/N: OT08PC
• 3-phase fuse block/disconnect:
P/N: FH3P
• 2 Amp fuse: P/N: P0600-11
• DIN rail: P/N: C103PM (Al)
Available Models:
PLM6405
PLM6502
PLM6805
PLM8405
PLM8805
PLM9405
PLM9502
PLM9805
PLM9820
If desired part number is not listed, please call us to
see if it is technically possible to build .
Order Table:
PLM
X
Line Voltage
─6 - 240VAC
─8 - 380VAC
─9 - 480VAC
Specifications
X
Voltage Unbalanced
─Fixed - Specify - 4-8%
in 1% increments
X
Trip Delay
─Fixed - Specify from 2-20s
in 1s increments using
two digits
Line Voltage
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-phase delta or wye with no connection to
neutral
Operating Voltage:
Model
Adj. Line Voltage Range
Line Voltage Max.
240
200-240VAC
270VAC
380
360-430VAC
480VAC
480
400-480VAC
530VAC
AC Line Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . 50/100 Hz
Phase Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ABC
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . ≅ 2W for 240V units
≅ 3W for 380 - 480V units
Low Voltage & Voltage Unbalance
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage detection with delayed trip & automatic
reset
Low Voltage
Trip Voltage . . . . . . 88 - 92% of adjusted line voltage
Reset Voltage . . . . . Plus 3% of trip voltage
Voltage Unbalance
Trip Unbalance . . . Factory fixed from 4 - 8%
Reset on Balance . . -0.7% unbalance typical
Trip Delay
Range . . . . . . . . . . . Factory fixed from 2 - 20s
Tolerance . . . . . . . . ±15%
Phase Reversal & Phase Loss
Response Time:
Phase Reversal . . . . . . ≤ 200ms
Phase Loss . . . . . . . . . . ≤ 200ms
114
Phase Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 35% unbalance
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electromechanical relay
Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Isolated, SPDT
Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10A resistive @ 240VAC, 277VAC max;
1/2 Hp @ 240VAC; 1/4 Hp @ 120VAC
5
7
Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical - 1 x 10 ; Electrical - 1 x 10
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IEEE C62.41-1991 Level B
Isolation Voltage . . . . . . . . . . . . . . . . . . . . . . . ≥ 2500V RMS input to output
Mechanical
Mounting* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-pin plug-in socket rated 600VAC
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 x 2.39 x 1.78 in. (81.3 x 60.7 x 45.2 mm)
Environmental
Operating / Storage Temperature . . . . . . . . -40° to 60°C / -40° to 85°C
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ 4.4 oz (125 g)
*CAUTION: Select an octal socket rated for 600VAC operation.
www.ssac.com • 800-843-8848 • fax: 605-348-5685
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
Voltage Monitors
TVW Series
Provides protection for motors and other sensitive
loads. Continuously measures the voltage of
each of the three phases using a microcontroller
circuit design that senses under and overvoltage,
voltage unbalance, phase loss, and phase reversal.
Protection is provided even when regenerated
voltages are present. Includes a trip delay to
prevent nuisance tripping and a restart delay to
prevent short cycling after a momentary power
outage .
For more information see:
Appendix B, page 167, Figure 30 for dimensional drawing.
Appendix C, page 168, Figure 14 for connection diagram.
Operation
Upon application of line voltage, the restart delay begins. The output is de-energized during restart delay. Under
normal conditions, the output energizes after the restart delay. Undervoltage, overvoltage, and voltage unbalance
must be sensed for the complete trip delay period before the output de-energizes. The restart delay begins as
soon as the output de-energizes. If the restart delay is completed when a fault is corrected, the output energizes
immediately. The output will not energize if a fault is sensed as the input voltage is applied. If the voltage selector
is set between two voltage marks (i.e. between 220 and 230V), the LED will flash red rapidly. The TVW provides
fault protection at the lower of the two line voltages (i.e. 220V).
Reset: Reset is automatic upon correction of a fault.
LED Operation
The LED flashes green during the restart delay, then glows green when the output energizes. It flashes red during
the trip delay then glows red when the output de-energizes. It flashes red/green if phase reversal is sensed. If
the voltage selector knob is between settings, it rapidly flashes red.
Features:
• Protects against phase loss & reversal; over,
under & unbalanced voltages; short
cycling
• Fixed trip points & delays
• Adjustable voltages from 208 to 480VAC
in 4 ranges
• Monitor 600VAC lines by connecting VRM
accessory
• Isolated, 10A, SPDT output contacts
• Bi-color LED indicates: output status, faults,
time delays, phase reversal & setpoint
• ASME A17.1 rule 210.6
• NEMA MG1 14:30, 14:35
• IEEE C62.41-1991 Level B
Approvals:
Auxilary Products:
• 3-phase fuse block/disconnect:
P/N: FH3P
• 2 Amp fuse: P/N: P0600-11
• DIN rail: P/N: C103PM (Al)
• Female quick connect:
P/N: P1015-13 (AWG 10/12)
P/N: P1015-64 (AWG 14/16)
P/N: P1015-14 (AWG 18/22)
• Voltage reduction module:
P/N: VRM6048
Available Models:
TVW575S1M
TVW6510S0.4S
TVW9510S0.4S
If desired part number is not listed, please call us to
see if it is technically possible to build .
Order Table:
TVW
X
Line Voltage
Wide Range
─5 - 208-240VAC
X
Voltage Unbalance
─Fixed - Specify 4-10%
in 1% increments
Selectable
─6 - 208, 220, 230 & 240VAC
─8 - 380, 400 & 415VAC
─9 - 430, 440, 460 & 480VAC
X
Trip Delay*
─Fixed - Specify from 0 .2-1s
in 0.1s increments
─Fixed - Specify from
1-100s in 1s increments
*Must indicate (S) for secs. or (M)
for mins.
X
Restart Delay*
─Fixed - Specify from 0 .4-1s
in 0.1s increments
─Fixed - Specify from 1-100s in 1s
increments
─Fixed - Specify from 1-999min in
1min increments
Specifications
Line Voltage
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-phase delta or wye with no connection to neutral
Input Voltage/Tolerance . . . . . . . . . . . . . . . . . . . 208 to 480VAC in 4 ranges/-30% - 20%
AC Line Frequency . . . . . . . . . . . . . . . . . . . . . . . . 50 - 100 Hz
Phase Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . ABC
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . Approx. 2W for 240V units
Approx. 3W for 480V units
Overvoltage, Undervoltage, & Voltage Unbalance
Overvoltage & Undervoltage . . . . . . . . . . . . . . . . Voltage detection with delay trip & automatic
reset
Undervoltage Trip Point . . . . . . . . . . . . . . . . . . . . 88 - 92% of the selected line voltage
Reset Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ +3% of trip voltage
Overvoltage Trip Point . . . . . . . . . . . . . . . . . . . . . 109 - 113% of the selected line voltage
Reset Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ -3% of trip voltage
Trip Variation vs Temperature . . . . . . . . . . . . . . ≤ ±2%
Voltage Unbalance . . . . . . . . . . . . . . . . . . . . . . . Factory fixed, from 4 - 10%
Reset On Balance . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ -0.7% unbalance
Trip Delay Range . . . . . . . . . . . . . . . . . . . . . . . . . . Fixed from 0.2 - 100s ±15% or ±0.1s,
whichever is greater
Restart Delay Range . . . . . . . . . . . . . . . . . . . . . . . Fixed from 0.4s - 999m ±15% or ±0.2s,
whichever is greater
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Phase Reversal & Phase Loss Response . . . . . . . ≤ 200ms; automatic reset
Phase Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥ 25% unbalance
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Isolated, SPDT
Rating
208 to 240VAC (55°C) . . . . . . 10A resistive @ 125VAC, 5A @ 250VAC,
1/4 hp @ 125VAC
380 to 480VAC . . . . . . . . . . . . 10A resistive @ 240VAC, 1/4 hp @ 125VAC,
1/3 hp @ 250VAC, max. voltage 277VAC
Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical - 1 x 106; Electrical - 1 x 105
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IEEE C62.41-1991 Level B
Dielectric Breakdown 208 to 240VAC . . . . . . . ≥ 1500V RMS input to output terminals
380 to 480VAC . . . . . . ≥ 2500V RMS input to output terminals
Mechanical
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Surface mount with one #8 (M5 x 0.8) screw
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 x 2 x 1.25 in. (50.8 x 50.8 x 31.8 mm)
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 in. (6.35 mm) male quick connect
terminals
Environmental
Operating / Storage Temperature . . . . . . . . . . . -40° to 55°C / -40° to 85°C
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95% relative, non-condensing
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ 2.8 oz (79 g)
115
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Voltage Monitors
TVM Series
Provides protection for motors and other sensitive
loads. Continuously measures the voltage of
each of the three phases using a microcomputer
circuit design that senses under and overvoltage,
voltage unbalance, phase loss, and phase reversal.
Protection is provided even when regenerated
voltages are present. Includes a trip delay to
prevent nuisance tripping and a restart delay to
prevent short cycling after a momentary power
outage .
For more information see:
Appendix B, page 167, Figure 30 for dimensional drawing.
Appendix C, page 168, Figure 14 for connection diagram.
Features:
• Protects against phase loss & reversal; over,
under & unbalanced voltages; short
cycling
• Fixed trip points & delays
• Fixed voltages from 208 to 480VAC
• Isolated, 10A, SPDT ouput contacts
• Bi-color LED indicator shows: output status,
faults, time delays & phase reversal
• ASME A17.1 rule 210.6
• NEMA MG1 14:30, 14:35
• IEEE C62.41-1991 Level B
Approvals:
Auxiliary Products:
Operation
Upon application of line voltage, the restart delay begins. The output relay is de-energized during restart delay.
Under normal conditions, the output energizes after restart delay. Undervoltage, overvoltage, and voltage
unbalance must be sensed for continuous trip delay period before the output is de-energized. The output will not
de-energize if a fault is corrected during the trip delay. The restart delay begins as soon as the output relay deenergizes. If the restart delay is completed when the fault is corrected, the output relay will energize immediately.
The output relay will not energize if a fault or phase reversal is sensed as 3-phase input voltage is applied.
Reset: Reset is automatic upon correction of a fault.
LED Operation
The LED flashes green during the restart delay, then glows green when the output energizes. It flashes red during
the trip delay then glows red when the output de-energizes. It flashes red/green if phase reversal is sensed.
• Female quick connect:
P/N: P1015-13 (AWG 10/12)
P/N: P1015-64 (AWG 14/16)
P/N: P1015-14 (AWG 18/22)
• 3-phase fuse block/disconnect:
P/N: FH3P
• 2 Amp fuse: P/N: P0600-11
• Voltage reduction module:
P/N: VRM6048
Available Models:
TVM460A510S5S
TVM208A100.5S3S
TVM460A75S2M
TVM230A101S1S
TVM480A100.5S3S
TVM400A101S1S
TVM480A50.5S2S
TVM460A101S1S
TVM460A41S5M
If desired part number is not listed, please call us to
see if it is technically possible to build .
Order Table:
TVM
X
Line Voltage
─208A - 208VAC
─220A - 220VAC
─230A - 230VAC
─240A - 240VAC
─380A - 380VAC
─400A - 400VAC
─415A - 415VAC
─440A - 440VAC
─460A - 460VAC
─480A - 480VAC
X
Voltage Unbalance
─Fixed - Specify 4-10%
in 1% increments
X
Trip Delay*
─Fixed - Specify from 0 .2-1s
in 0.1s increments
─Fixed - Specify from
1-100s in 1s increments
X
Restart Delay*
─Fixed - Specify from 0 .5-1s
in 0.1s increments
─Fixed - Specify from 1-100s in 1s
increments
─Fixed - Specify from 1-999min in
1min increments
*Must indicate (S) for secs. or (M)
for mins.
Specifications
Line Voltage
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-phase delta or wye with no connection to neutral
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208 to 480VAC
AC Line Frequency . . . . . . . . . . . . . . . . . . . . . . . 50 - 100 Hz
Phase Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . ABC
Power Consumption . . . . . . . . . . . . . . . . . . . . . Approx. 2W for 240V units
Approx. 3W for 480V units
Overvoltage, Undervoltage, & Voltage Unbalance
Overvoltage & Undervoltage . . . . . . . . . . . . . . Voltage detection with delay trip & automatic reset
Undervoltage Trip Point . . . . . . . . . . . . . . . . . 88 - 92% of the selected line voltage
Reset Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ +3% of trip voltage
Overvoltage Trip Point . . . . . . . . . . . . . . . . . . 109 - 113% of the selected line voltage
Reset Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ -3% of trip voltage
Trip Variation vs Temperature . . . . . . . . . . . ≤ ±2%
Voltage Unbalance . . . . . . . . . . . . . . . . . . . . . . Factory fixed from 4 - 10%
Reset On Balance . . . . . . . . . . . . . . . . . . . . . . . . . ≅ -0.7% unbalance
Trip Delay Range . . . . . . . . . . . . . . . . . . . . . . . . Fixed from 0.2 - 100s ±15% or ±0.1s,
whichever is greater
Restart Delay Range . . . . . . . . . . . . . . . . . . . . . . Fixed from 0.5s - 999m ±15% or ±0.2s,
whichever is greater
Phase Reversal & Phase Loss Response . . . . . ≤ 200ms; automatic reset
Phase Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥ 25% unbalance
116
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Isolated SPDT relay contacts
Rating
208 to 240VAC (55°C) . . . . . 10A resistive @ 125VAC, 5A @ 250VAC,
1/4 hp @ 125VAC
380 to 480VAC . . . . . . . . . . . 10A resistive @ 240VAC, 1/4 hp @ 125VAC,
1/3 hp @ 250VAC, max. voltage 277VAC
Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical - 1 x 106; Electrical - 1 x 105
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IEEE C62.41-1991 Level B
Dielectric Breakdown 208 to 240VAC . . . . . ≥ 1500V RMS input to output terminals
380 to 480VAC . . . . . ≥ 2500V RMS input to output terminals
Mechanical
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Surface mount with one #8 (M5 x 0.8) screw
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 x 2 x 1.25 in. (50.8 x 50.8 x 31.8 mm)
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 in. (6.35 mm) male quick connect
terminals
Environmental
Operating / Storage Temperature . . . . . . . . . -40° to 55°C / -40° to 85°C
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95% relative, non-condensing
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ 2.8 oz (79 g)
www.ssac.com • 800-843-8848 • fax: 605-348-5685
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
Voltage Monitors
PLR Series
The PLR Series provides a cost effective means of
preventing 3-phase motor startup during adverse
voltage conditions. Proper A-B-C sequence must
occur in order for the PLR’s output contacts to
energize. In addition, the relay will not energize
when an undervoltage or phase loss condition
is present. The PLR protects a motor against
undervoltage operation. The adjustment knob sets
the undervoltage trip point.
For more information see:
Appendix B, page 165, Figure 8 for dimensional drawing.
Appendix C, page 168, Figure 13 for connection diagram.
Features:
• Protects against phase loss (on startup),
phase reversal & undervoltage
• Used where moderate voltage unbalance
protection is not required
• Direct replacement for most popular
3-phase monitors
• 8-pin octal base connection
• Isolated, 5A, SPDT output contacts
• AMSE A17.1 rule 210.6
• NEMA MG1 14:30, 14:35
• IEEE C62.41-1991 Level B
Approvals:
Auxilary Products:
Operation
The output relay is energized and the LED glows when all voltages are acceptable and the phase sequence is
correct. Undervoltage must be sensed for a continuous dropout delay period before the relay de-energizes.
Reset is automatic upon correction of the fault condition. The output relay will not energize if a fault condition
is sensed as power is applied .
Field Adjustment: Turn the adjustment knob fully counterclockwise and apply three-phase power. The LED should
be ON. Increase adjustment until the LED goes OFF. Decrease adjustment until LED glows again. If nuisance
tripping occurs, decrease the adjustment slightly.
NOTE: When properly adjusted and operating in an average system, a voltage unbalance of 10% or more is
required for phase loss detection. When a phase is lost while the motor is running, a voltage will be induced
into the open phase nearly equal in magnitude to the normal phase-to-phase voltage. This condition is known
as regeneration. When regenerated voltages are present, the voltage unbalance during single phasing may not
exceed 10% for some motors. The PLR Series may not provide protection under this condition. For systems that
require superior phase loss protection, select the PLMU Series.
• Panel mount kit: P/N: BZ1
• Octal 8-pin socket: P/N: OT08PC
• 3-phase fuse block/disconnect:
P/N: FH3P
• 2 Amp fuse: P/N: P0600-11
• DIN rail: P/N: C103PM (Al)
Available Models:
PLR120A
PLR240A
PLR380A
PLR480A
If desired part number is not listed, please call us to
see if it is technically possible to build .
Order Table:
Voltage
95-140VAC
190-270VAC
340-450VAC
380-500VAC
Part Number
PLR120A
PLR240A
PLR380A
PLR480A
Specifications
Line Voltage
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-phase delta or wye with no connection to neutral
Nominal Voltage
Undervoltage Dropout Adj Range
Line Voltage Max.
120VAC
85 to 130VAC
143VAC
240VAC
170 to 240VAC
270VAC
380VAC
310 to 410VAC
480VAC
480VAC
350 to 480VAC
530VAC
AC Line Frequency . . . . . . . . . . . . . . . . 50/60Hz
Phase Sequence . . . . . . . . . . . . . . . . . . . ABC
Response Times
Pull-in . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 400ms
Drop-out . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 100ms
Hysterisis
Pull-in/Drop-out . . . . ≅ 2%
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electromechanical relay, energized when all
voltages are acceptable
Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPDT
Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A resistive @ 240VAC, 1/4 Hp @ 120VAC
Maximum Voltage . . . . . . . . . . . . . . . . . 250VAC
www.ssac.com • 800-843-8848 • fax: 605-348-5685
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . IEEE C62.41-1991 Level B
Isolation Voltage
120 & 240VAC . . . . . . . . . . . . .≥ 1500V RMS input
to output
380 & 480VAC . . . . . . . . . . . . .≥ 2500V RMS input
to output
Mechanical
Dimensions . . . . . . . . . . . . . . . . . . . . . . . 3.2 x 2.39 x 1.78 in. (81.3 x 60.7 x 45.2 mm)
Mounting* . . . . . . . . . . . . . . . . . . . . . . . . Plug-in socket
Termination . . . . . . . . . . . . . . . . . . . . . . Octal 8-pin, plug-in
Environmental
Operating/ Storage Temperature . . . . 0° to 55°C / -40° to 85°C
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ 6 oz (170 g)
*CAUTION: Select an octal socket rated for 600VAC operation.
117
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Voltage Monitors
PLS Series
The PLS Series is a low cost phase sensitive control
that provides an isolated contact closure when the
proper A-B-C phase sequence is applied. Protects
sensitive 3-phase equipment and equipment
operators from reverse rotation. Designed to
be compatible with motor overloads or other
3-phase equipment protection devices. Protection
for equipment control centers where frequent
reconnection or electrical code makes reverse
rotation protection essential. Examples include:
mobile refrigerated containers, construction
equipment, hoists, pumps, conveyors, elevators
and escalators .
For more information see:
Appendix B, page 166, Figure 19 for dimensional drawing.
Appendix C, page 168, Figure 13 for connection diagram.
Operation
The internal relay and LED are energized when the phase sequence is correct. The output relay will not energize
if the phases are reversed. Reset is automatic upon correction of the fault.
Features:
• Protects against phase reversal
• Low cost protection, one unit for all sized
motors
• 3-wire connection for dela or wye systems
• Octal base connect - industry standard
wiring
• Isolated, SPDT output contacts
• Factory calibrated - no adjustments required
Approvals:
Auxilary Products:
• Panel mount kit: P/N: BZ1
• Octal 8-pin socket: P/N: OT08PC
• 3-phase fuse block/disconnect:
P/N: FH3P
• 2 Amp fuse: P/N: P0600-11
• Din rail: P/N: C103PM (Al)
Available Models:
PLS120A
PLS240A
PLS480A
Order Table:
Voltage
120VAC
208/240VAC
380/415VAC
440/480VAC
Part Number
PLS120A
PLS240A
PLS380A
PLS480A
Specifications
Line Voltage
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-phase delta or wye with no connection to neutral
Nominal Voltage
Minimum Voltage
Maximum Voltage
120VAC
95VAC
135VAC
208/240VAC
175VAC
255VAC
380/415VAC
310VAC
430VAC
440/480VAC
380VAC
500VAC
AC Line Frequency . . . . . . . . . . . . . . . . . . . . . . 50/60 Hz
Phase Sequence . . . . . . . . . . . . . . . . . . . . . . . . . ABC
Response Times
Pull-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 300ms
Drop-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 50ms
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electromechanical relay, energized when the
phase sequence is correct
Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Isolated SPDT
Rating
120 & 240VAC . . . . . . 10A resistive @ 240VAC
380 & 480VAC . . . . . 8A resistive @ 240VAC
118
Maximum Voltage . . . . . . . . . . . . . . . . . . . . . . . 250VAC
Protection
Isolation Voltage
120 & 240VAC . . . ≥ 1500V RMS input to output
380 & 480VAC . . . ≥ 2500V RMS input to output
Mechanical
Mounting* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Plug-in socket
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 x 2.39 x 1.78 in. (81.3 x 60.7 x 45.2 mm)
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . Octal 8-pin plug-in
Environmental
Operating / Storage Temperature . . . . . . . . . -40°to 55°C / -40° to 85°C
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ 6 oz (170 g)
*CAUTION: Select an octal socket rated for 600VAC operation.
www.ssac.com • 800-843-8848 • fax: 605-348-5685
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
Voltage Monitors
HLV Series
The HLV Series is a single-phase undervoltage
monitor designed to protect sensitive equipment
from brownout or undervoltage conditions. Time
delays are included to prevent nuisance tripping
and short cycling. The 30A, 1hp rated, SPDT relay
contacts allow direct control of motors, solenoids
and valves. The output relay can be ordered with
isolated SPDT contact to allow monitoring of one
voltage and switching a separate voltage. Two
undervoltage trip point ranges allow monitoring
of 110 to 120VAC or 208 to 240VAC systems.
For more information see:
Appendix B, page 165, Figure 2 for dimensional drawing.
Appendix C, page 169, Figure 15 for connection diagram.
Operation
Upon application of input voltage the output relay remains de-energized. When the input voltage value is above
the pull-in voltage, the restart delay begins. At the end of the restart delay, the output relay energizes. When
the input voltage falls below the trip point, the trip delay begins. If the input voltage remains below the pull-in
voltage for the entire trip delay the relay de-energizes. If the input voltage returns to a value above the pull-in
voltage, during the trip delay, the trip delay is reset and the relay remains energized. If the input voltage falls
below the trip point voltage during the restart delay, the delay is reset and the relay remains de-energized. Reset
is automatic upon correction of an undervoltage fault.
Reset: Removing input voltage resets the output relay and the time delays.
Features:
• Protects against undervoltage in singlephase systems
• 30A, SPDT, NO output contacts
• 100 to 240VAC input voltage
• 70 to 220VAC adjustable undervoltage trip
point in 2 ranges
• Restart delays from 3 - 300s
• Trip delay 1 - 20s fixed
• Isolated or non-isolated relay contacts
Approvals:
Auxiliary Products:
• Quick connect to screw adaptor:
P/N: P1015-18
• Female quick connect:
P/N: P1015-13 (AWG 10/12)
P/N: P1015-64 (AWG 14/16)
• Mounting bracket: P/N: P1023-6
• DIN rail: P/N: C103PM (Al)
• DIN rail adaptor: P/N: P1023-20
Available Models:
HLVA6I23
PI
TP
V
C-NO
C-NC
If desired part number is not listed, please call us to
see if it is technically possible to build .
IV
tr = Restart Delay
td = Trip Delay
PI = Pull-in 105% or trip point
TP = Trip Point
V = Monitored Voltage
IV = Input voltage
C-NO = Normally Open Contacts
C-NC = Normally Closed Contacts
Order Table:
HLVA
X
Undervoltage Range
─4 - 70 to 120VAC
─6 - 170 to 220VAC
X
Output Connection
─I - Isolated SPDT
─N - Non-Isolated SPDT
X
Restart Delay
─2 - Onboard adjustment
3-300s
X
Trip Delay
─Fixed - Specify from 1-20s
in 1s increments
Specifications
Input
Min & Max RMS Voltage . . . . . . . . . . . . . . . .70 to 264VAC
AC Line Frequency . . . . . . . . . . . . . . . . . . . . .50/60 Hz
Power Consumption . . . . . . . . . . . . . . . . . . . .AC ≤ 4VA
Undervoltage Sensing
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Peak voltage sensing
Ranges
(4) . . . . . . . . . . . . . .70 to 120VAC
(6) . . . . . . . . . . . . . .170 to 220VAC
Pull-In Voltage . . . . . . . . . . . . . . . . . . . . . . . . .105% or trip point voltage
Trip Point Accuracy . . . . . . . . . . . . . . . . . . . . .± 3% of trip point
Time Delay
Restart Delays . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 300s adjustable
Trip Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 20s fixed in 1s increments
Repeat Accuracy . . . . . . . . . . . . . . . . . . . . . . .±0.5% or 20ms, whichever is greater
Tolerance (Factory Calibration) . . . . . . . . . . .±5%
Reset Time . . . . . . . . . . . . . . . . . . . . . . . . . . . .≤ 150ms
Time Delay vs. Temp. & Voltage . . . . . . . . . .≤ ±10%
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electromechanical relay
Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SPDT
www.ssac.com • 800-843-8848 • fax: 605-348-5685
Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SPDT-N.O
SPDT-NC
General Purpose
125/240VAC
30A
15A
Resistive
125/240VAC
30A
15A
28VDC
20A
10A
Motor Load
125VAC
1 hp*
1/4 hp**
240VAC
2 hp**
1 hp**
Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical - 1 x 106
Electrical - 1 x 105, *3 x104, **6,000
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IEEE C62.41-1991 Level A
Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Encapsulated
Isolation Voltage . . . . . . . . . . . . . . . . . . . . . . .≥ 1500V RMS input to output; isolated units
Insulation Resistance . . . . . . . . . . . . . . . . . . . .≥ 100 MΩ
Mechanical
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Surface mount with one #10 (M5 x 0.8) screw
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 x 2 x 1.5 in. (76.7 x 51.3 x 38.1 mm)
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . .0.25 in. (6.35 mm) male quick connects
Environmental
Operating / Storage Temperature. . . . . . . . .-40° to 60°C / -40° to 85°C
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95% relative, non-condensing
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .≅ 3.9 oz (111 g)
119
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
Voltage Monitors
KVM Series
The KVM Series is a single-phase undervoltage
monitor designed to protect sensitive equipment
against brownout undervoltage conditions. The
compact design and encapsulated construction
make the KVM an excellent choice for OEM
equipment .
For more information see:
Appendix B, page 165, Figure 1 for dimensional drawing.
Appendix C, page 169, Figure 16 for connection diagram.
Operation
The output relay is energized and the LED glows
green when the input voltage is above the reset
voltage threshold. If the input voltage drops below the
undervoltage setpoint, the output relay and LED will
de-energize. The output relay will remain de-energized
as long as the input voltage is below the reset voltage.
Reset is automatic when the input voltage returns to a
normal range .
Features:
• Economical single-phase brownout/undervoltage protection
• Isolated, 8A, SPDT output contacts
• Protects sensitive 110 to 120VAC or 220 to
240VAC loads
• Adjustable low voltage trip point
• LED Indicator
Approvals:
Auxilary Products:
• Quick connect to screw adaptor:
P/N: P1015-18
• Female quick connect:
P/N: P1015-64 (AWG 14/16)
• DIN rail: P/N: C103PM (Al)
• DIN rail adaptor: P/N: P1023-20
Available Models:
KVM4
KVM6
TP = Undervoltage Setpoint
R = Reset Point
Order Table:
Undervoltage Setpoint
78 to 99VAC
156 to 199VAC
Maximum Line Voltage
132VAC
264VAC
Part Number
KVM4
KVM6
Specifications
Line Voltage
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single phase
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 to 120VAC or 220 to 240VAC
AC Line Frequency . . . . . . . . . . . . . . . . . . . . . . . . 50/60 Hz
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . 2.5W @ 132VAC; 4.5W @ 264VAC
Power Off Reset Time . . . . . . . . . . . . . . . . . . . . . . < 150ms
Undervoltage Detection
Undervoltage Setpoint
KVM4 . . . . . . . . . 78 to 99VAC
KVM6 . . . . . . . . . 156 to 199VAC
Undervoltage Reset Point
KVM4 . . . . . . . . . Fixed at 104VAC
KVM6 . . . . . . . . . Fixed at 209VAC
Repeatability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 0.5% under fixed conditions
±1% over temperature range
Voltage Sensing Accuracy . . . . . . . . . . . . . . . . . . ±2% at 25°C
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electromechanical relay
Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPDT
Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8A resistive @ 120VAC, 1/3 hp @ 120/240VAC
120
6
5
Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical - 1 x 10 ; Electrical - 1x10
LED Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glows green when output is energized
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IEEE C62.41-1991 Level A
Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Encapsulated
Isolation Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . > 1500V RMS input to output
Insulation Resistance . . . . . . . . . . . . . . . . . . . . . . . > 100 MΩ minimum
Mechanical
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Surface mount with one #10 (M5 x 0.8) screw
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 x 2 x 1.21 in. (50.8 x 50.8 x 30.7 mm)
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 in. (6.35 mm) male quick connect
terminals
Environmental
Operating / Storage Temperature . . . . . . . . . . . . -25 to 55°C / -40 to 85°C
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95% relative, non-condensing
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.6 oz (74 g)
www.ssac.com • 800-843-8848 • fax: 605-348-5685
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
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