Description
What it is
Siemens 7SR1004 microprocessor protection relay (Reyrolle 7SR — overcurrent protection). It monitors current/voltage and commands the opening of the circuit breaker in the event of faults, protecting feeders, transformers and motors in medium voltage networks.
Protection functions (ANSI)
- 50 — instantaneous overcurrent
- 51 — time-delay overcurrent
- 50N/51N — neutral overcurrent (ground fault)
The complete set of functions (directional, undervoltage 27, overvoltage 59, unbalance 46, thermal image 49 etc.) varies according to the model and configuration — confirm in the datasheet.
Communication
Support for IEC 61850 / Modbus for integration with SCADA/substation automation.
Standard
Measuring and protection relay according to IEC 60255.
Technical specifications
- Type
- Digital (microprocessor-based) protection relay
- Brand
- Siemens
- Standard
- IEC 60255
- Application
- Feeder/transformer protection in medium voltage
- Communication
- IEC 61850 / Modbus
- Model / Reference
- 7SR1004
- Main functions (ANSI)
- 50, 51, 50N, 51N (overcurrent)
Frequently asked questions
What protection functions does this relay offer?+
ANSI 50/51 (phase) and 50N/51N (neutral/ground) overcurrent functions. Additional functions (27, 59, 46, 49, directional) depend on the model and configuration — confirm in the datasheet.
Does it have communication for SCADA?+
Yes, it supports IEC 61850 / Modbus for integration with supervision and automation systems.
What is the application for?+
Protection of feeders, transformers and motors in medium voltage metal-clad switchgear and substations.
What standard does it meet?+
IEC 60255, applicable to measuring relays and protection equipment.
ℹ Enriquecido por cruzamento com fontes do fabricante (Siemens) e IEC 60255. A CONFIRMAR no datasheet: código de encomenda completo, conjunto exato de funções ANSI, faixas de ajuste e alimentação auxiliar.
