Phase Unbalance, Phase Loss Monitors CM
Phase Unbalance, Phase Loss Monitors
CM-ASN
DPDT Relay Output
Description
The phase monitor CM-ASN is used to monitor three-phase supply voltages for phase unbalance, phase loss (even
if 95 % of the phase voltage is regenerated) and phase sequence.
a
b
CM-ASN: The output relay is energized as long as the phases are balanced and the phase sequence is correct
(clockwise rotating field). If the unbalancing exceeds the set threshold (5 to 15 %), the output relay de-energizes
and the fault is indicated by the LEDs. For the unbalance monitoring function, a trip time delay of 0.1 to 10 s can
be set with a potentiometer, to prevent nuisance tripping, (e.g. in case of short unbalance during motor starting). In
the case of motors which continue running with only two phases, regenerated voltage of more than 95% may be
produced. The output relay may not de-energize on the loss of a phase.
c
d
f
e
a
b
c
d
Unbalance threshold
Timer adjustment
A: red LED - unbalanced
P: red LED - phase loss and
phase sequence fault
e U: green LED - supply
voltage
f R: yellow LED - relay status
Phase loss, unbalanced
voltage, phase reversal
monitoring
Adjustable trip-delay from
0.1…10 s
Adjustable unbalance: 5…15 %
5 monitored three-phase
voltages
DPDT contacts
LEDs for status indication
Function
A1/A2
unbalance
Vnom
unbalance
Level
L1, L2, L3
15/18
15/16
25/28
25/26
t = Trip-delay: 0.1-10 s, effective only for unbalanced voltages
Connection
A1-A2
Supply voltage
L1, L2, L3 Monitoring voltage
Vnom
220…240 V AC
380…415 V AC
440 V AC
480…500 V AC
600 V
15-16/18
25-26/28
Output contacts
Approvals:
Ordering Table
Type
Supply voltage = Monitoring
monitoring voltage frequency
Part Number
Monitoring voltage: 3 x 220-240 V AC 50 Hz; 3 x 220-240 V AC 60 Hz
CM-ASN
Accessories
110-130 V AC
220-240 V AC
380-415 V AC
220-240 V AC
50 Hz
50 Hz
50 Hz
60 Hz
1SVR 450 320 R 0200
1SVR 450 321 R 0200
1SVR 450 322 R 0200
1SVR 450 421 R 0200
Monitoring voltage: 3 x 380-415 V AC 50 Hz; 3 x 380-415 V AC 60 Hz
CM-ASN
110-130 V AC
50 Hz
1SVR 450 320 R 0500
220-240 V AC
50 Hz
1SVR 450 321 R 0500
1SVR 450 322 R 0500
380-415 V AC
50 Hz
220-240 V AC
60 Hz
1SVR 450 422 R 0500
Monitoring voltage: 3 x 440 V AC 60 Hz
CM-ASN
440 V AC
60 Hz
1SVR 450 423 R 0600
7.28
Monitoring voltage: 3 x 600 V AC 50 Hz
CM-ASN
600 V AC
60 Hz
ASN02B01
See accessory pages for
specifications.
12.5.04
Monitoring voltage: 3 x 480-500 V AC 50 Hz; 3 x 480-500 V AC 60 Hz
CM-ASN
110-130 V AC
50 Hz
1SVR 450 320 R 0700
220-240 V AC
50 Hz
1SVR 450 321 R 0700
380-415 V AC
50 Hz
1SVR 450 322 R 0700
1SVR 450 932 R 0100
500-550 V AC
50 Hz
480-500 V AC
60 Hz
1SVR 450 424 R 0700
1SVR 450 426 R 0800
Low Voltage Products & Systems
Phase Unbalance, Phase Loss Monitors
CM-ASN
DPDT Relay Output
Load Limit Curves
Technical Data
Input
Supply voltage - power consumption
Tolerance of supply voltage
Supply voltage frequency
A1-A2
Time Delay
Trip delay time adjustable
Timing over the supply voltage range
Timing over the temperature range
Measuring Circuit
Monitoring voltage Vnom.
All voltage ranges - 3 VA
-15 % ... +10 %
50 or 60 Hz (See ordering table)
Message: unbalance error
0.1...10 s
≤ 0.5 %
≤ 0.06 % / °C
L1, L2, L3
Frequency
Unbalance adjustable % of trip point
Unbalance hysteresis
Measuring cycle max.
Temperature error over the temperature range
Error over the supply voltage range
220...240 V AC, 380...415 V AC,
440 V AC, 480...500 V AC, 600 V AC
50 or 60 Hz (See ordering table)
5...15 %
20 %
< 100 ms
≤ 0.06 % / °C
≤ 0.5 %
Display of Operating Status
Supply voltage
Output relay energized
Unbalanced voltages
Phase failure and phase sequence error
U
R
A
P
Output
15-16/18, 25-26/28
Rated voltage
VDE 0110, IEC 60947-1
Rated switching voltage max.
Rated switching current
AC 12 (resistive)
AC 15 (inductive)
DC 12 (resistive)
DC 13 (inductive)
Maximum mechanical life
Maximum electrical life (acc. to AC 12 / 230 V / 5 A)
Short-circuit proof, max. fuse rating
Relay, 2 SPDT contacts, normally energized
400 V
400 V AC
5 A (at 230 V)
3 A (at 230 V)
5 A (at 24 V)
2.5 A (at 24 V)
30 x 106 operations
1 x 105 operations
5 A / fast acting
General Data
Rated impulse withstand voltage Vimp
Operating temperature
Storage temperature
Mounting to DIN rail (EN 50022)
Cable size stranded with wire end ferrule
Weight
4 kV
-25°C ... +65°C
-40°C ... + 85°C
Snap-on mounting/Screw mounting using an adapter
2 x 14 AWG (2 x 2.5 mm2)
Approx. 0.66 lb (300)
LED, green
LED, yellow
LED, red
LED, red
Mechanical View
ASN02B01
12.5.04
Low Voltage Products & Systems
7.29
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