SIU-C voltage and frequency protection relay
The SIU-C relay protects HV, MV and LV transformers and electrical machines by voltage and frequency. It has load shedding and sectionalizing automation functions, with a 24–230 V AC/DC supply.
- Power supply
- 24–230 V AC/DC
- Voltage inputs
- 5 channels from VTs or directly up to 1000 V
- Functions
- 27, 59, 59N, 81U/O, 81R (ROCOF), loss-of-mains protection
- Protocols
- IEC 60870-5-103/104, Modbus, DNP3.0, IEC 61850
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The relay has 5 voltage channels, which are connected from VTs or directly up to 1000 V. It performs functions 27, 59, 59N, 81U/O, 81R (ROCOF) and loss-of-mains protection. Communication supports IEC 60870-5-103/104, Modbus, DNP3.0 and IEC 61850. The log stores up to 3072 events.
Technical specifications
| Power supply | 24–230 V AC/DC |
|---|---|
| Voltage inputs | 5 channels from VTs or directly up to 1000 V |
| Functions | 27, 59, 59N, 81U/O, 81R (ROCOF), loss-of-mains protection |
| Protocols | IEC 60870-5-103/104, Modbus, DNP3.0, IEC 61850 |
| Recording | up to 3072 events |
Request a price and lead time
SIU-C voltage and frequency protection relay. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8536 49 00 90 |
|---|---|
| HS, 6 digits | 8536 49 |
| CN (EU) | 8536 49 00 |
| HTSUS (USA) | 8536 49 00 80 |
| China customs tariff | 8536 49 00 90 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
Can voltage be connected without a VT?
Yes, the 5 voltage channels are connected from VTs or directly up to 1000 V.
What protection functions does SIU-C perform?
27, 59, 59N, 81U/O, 81R (ROCOF) and loss-of-mains protection.
Which communication protocols are supported?
IEC 60870-5-103/104, Modbus, DNP3.0 and IEC 61850.
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