SUD472
Dipl.-Ing. W. Bender GmbH & Co. KG • Londorfer Str. 65 • 35305 Grünberg • Tel.: 06401 807-0 • Fax: 06401 807-259
Undervoltage or overvoltage relays for 3AC systems
without external supply voltage
SUD472
Product description
The voltage relays of the SUD472 series are designed to monitor the voltage of three-phase
AC systems without N conductor. The devices can be used for undervoltage or overvoltage monitoring. External supply voltage is not required. The response values are set
via potentiometers. An integrated energy backup maintains the power supply for five
seconds.
3.1
Typical applications
SUD472
Device features
•
Undervoltage and overvoltage
monitoring for 3AC systems
•
Without external supply voltage
•
3 device variants with adjustable
response values
70…140 V (3AC 110…V)
150…300 V (3AC 230…V)
270…520 V (3AC 400…V)
•
Response delay 0.3…5 s
•
Integrated energy backup
•
Test button for functional test
•
LEDs: Power On, Alarm
•
Alarm relay with two potential-free
changeover contacts
•
•
Monitoring of the power supply of motors and electrical installations
•
Monitoring of loads
•
Switching on and switching off at a certain voltage level
•
Monitoring of stand-by and emergency supply systems
•
Supply voltage monitoring of portable loads
Function overvoltage (switch U>Y)
When supply voltage is applied, the alarm relay works in N/O operation (relay de-energized). When the phase-to-phase voltage of one, two or all conductors exceeds the set
response value “Y”, the alarm relay energizes and the alarm LED “ALARM” lights up. If the
measured quantity drops below the response value plus hysteresis, the alarm relay switches back to its original state.
1
2
1 - Hysteresis Hy
2 - Response value Y
3
3 - Alarm relay
4 - Power On LED
5 - Alarm LED
4
Modular DIN rail enclosure
t1 - Response delay 0.3…5 s
t2 - Delay on release 0.5 s
Note
5
In case of new installations refer to
VMD421H.
Approvals
t3 - Energy backup 5 s
Function undervoltage (switch U<Y)
When supply voltage is applied, the alarm relay works in N/C operation (relay energized).
When the phase-to-phase voltage of one, two or all conductors drops below the set
response value “Y”, the alarm relay de-energizes and the alarm LED “ALARM” lights up. If
the measured quantity exceeds the response value plus hysteresis, the alarm relay switches back to its original state.
1
2
1 - Response value Y
2 - Hysteresis Hy
3
3 - Alarm relay
4 - Power On LED
5 - Alarm LED
4
5
t1 - Response delay 0.3…5 s
t2 - Delay on release 0.5 s
t3 - Energy backup 5 s
Note
False alarms resulting from operational measurement errors can be suppressed by setting
a time delay. The set response delay remains effective even in case of complete supply
voltage failure.
52
Main catalogue part 3 – 06.2007 / Electronic measuring and monitoring relays
Right to modifications reserved ! – © Dipl.-Ing. W. Bender GmbH & Co. KG, Germany
Undervoltage or overvoltage relays SUD472
Technical data undervoltage or overvoltage relays SUD472
Insulation coordination acc. to IEC 60664-1
Rated insulation voltage
Rated impulse voltage/pollution degree
Supply voltage
Supply voltage US
Power consumption
1
6
5
2
AC 400 V
4 kV/3
7
3
4
none
≤ 3 VA
Measuring circuit
Nominal system voltage Un
Response values (L-L)
Frequency fn
Response time tan
Response delay tv
Hysteresis
Delay on release
Repitition accuracy
Temperature influence
Recovery time tb
3AC 110 / 230 / 400 V
70…140 V / 150…300 V / 270…520 V
50…400 Hz
< 500 ms
0.3…5 s
2…4 %
approx. 0.5 s
±1.5 %
< 0.05 % / °C
0.2 s
Switching elements
Number of changeover contacts
Operating principle overvoltage function
Operating principle undervoltage function
Electrical service life, number of cycles
Contact class IEC 60255 Part 0-20
Rated contact voltage
Limited making capacity
Breaking capacity
1x2
N/O operation
N/C operation
12000
IIB
AC 250 V/DC 300 V
AC/DC 5 A
2 A, AC 230 V, cos phi 0.4
0.2 A, DC 220 V, L/R = 0.04 s
8
1 - 6 A fuse
2 - Power On LED “ON”
3 - LED “ALARM”
4 - “TEST” button
5 - Adjustable response value “Y”
6 - Selector switch to choose between undervoltage and
overvoltage “U<Y U>Y”
7 - Adjustable response delay “t”
8 - Alarm relay
Dimension diagram X470 Dimensions in mm
Environment / EMC
EMC immunity
acc. to IEC 61000-6-2
EMC emission
acc. to IEC 61000-6-4
Shock resistance IEC 60068-2-27 (during operation)
15 g/11 ms
Bumping IEC 60068-2-29 (during transport)
40 g/6 ms
Vibration resistance IEC 60068-2-6 (during operation)
1 g / 10…150 Hz
Vibration resistance IEC 60068-2-6 (during transport)
2 g / 10…150 Hz
Ambient temperature, during operation
-5…+50 ºC
Ambient temperature (during storage)
-25…+70 ºC
Climatic class acc. to IEC 60721-3-3
3K5 (except condensation and formation of ice)
Other
Operating mode
Mounting
Connection
Connection properties:
single wire
flexible with end ferrules
Degree of protection, internal components (IEC 60529)
Degree of protection, terminals (IEC 60529)
Screw fixing
DIN rail mounting acc. to
Flammability class
Product standard
Operating manual
Weight
continuous operation
any position
screw terminals
0.2…4 mm2
0.25…2.5 mm2
IP30
IP20
2 x M4
IEC 60715
UL94V-0
IEC 60255-6
BP301009
≤ 360 g
Ordering information
Type
Nominal system voltage Un
Response value
Art. No.
SUD472
3AC 110 V
70…140 V
B 933 219
SUD472
3AC 230 V
150…300 V
B 933 170
SUD472
3AC 400 V
270…520 V
B 933 702
Main catalogue part 3 – 06.2007 / Electronic measuring and monitoring relays
53
3.1
Wiring diagram
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