SEL-751 / SEL-751A / SEL-851 — MV feeder protection
SEL-751, SEL-751A and SEL-851 protect, control and monitor radial and ring feeders of distribution networks and industrial switchgear. The terminals include arc protection, fault location and detection of high-impedance and intermittent faults.
- Current inputs
- 1 A / 5 A, or LEA sensors
- Functions
- overcurrent protection, auto-reclosing, voltage and frequency protection, arc protection, fault locator, high-impedance and intermittent faults
- Arc protection
- operates from 1 ms (SEL-851)
- Protocols
- IEC 61850 Ed.2.1, IEC 60870-5-103, PRP, HSR, Modbus, DNP3
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The terminals replace the SEL-551/551C. They provide overcurrent protection, auto-reclosing, voltage and frequency protection and SEL-851 arc protection from 1 ms. Current inputs 1 A / 5 A, or LEA sensors in place of CTs.
Protocols IEC 61850 Ed.2.1, IEC 60870-5-103, Modbus and DNP3, with PRP and HSR redundancy.
Technical specifications
| Current inputs | 1 A / 5 A, or LEA sensors |
|---|---|
| Functions | overcurrent protection, auto-reclosing, voltage and frequency protection, arc protection, fault locator, high-impedance and intermittent faults |
| Arc protection | operates from 1 ms (SEL-851) |
| Protocols | IEC 61850 Ed.2.1, IEC 60870-5-103, PRP, HSR, Modbus, DNP3 |
Request a price and lead time
SEL-751 / SEL-751A / SEL-851 — MV feeder protection. 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
How fast is the SEL-851 arc protection?
The SEL-851 arc protection operates from 1 ms.
Does the terminal support IEC 60870-5-103?
Yes, together with IEC 61850 Ed.2.1, Modbus, DNP3 and PRP and HSR redundancy.
What replaces the SEL-551?
The SEL-751, SEL-751A and SEL-851 replace the SEL-551/551C.
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