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I. Basic Information
Order Model: 1MRK004822-BC
Product Model: REB670 (Relion Series)
Brand: ABB
Equipment Type: Bus Differential Protection Relay, mainly used for rapid protection of high-voltage bus faults in substations
Core Electrical Parameters
Power Supply: AC/DC wide range 90~250V (Universal AC/DC)
Current Input Specifications: 1A / 5A selectable, 50/60Hz industrial frequency
Switching Input: 110/125V DC
Trip Relay Rating: 110V DC, Rated Current 1A
Communication Interface: Panel Ethernet Port, supports IEC 61850, Modbus, DNP3, etc. protocols
Operating Temperature: -20℃ ~ +60℃, standard industrial-grade protection for substations
Main Protection Functions
Bus Differential Protection (Core): Precisely identifies faults within / outside the bus, milliseconds of tripping, preventing expansion of accidents due to bus short circuits
Zero Sequence Current Protection: Protection for single-phase grounding faults of the bus
Overcurrent, Negative Sequence Overcurrent, Voltage Abnormal Protection
Breaker Failure Protection, Automatic Reclosing, Fault Recording, Event Recording
Supports up to multi-branch bus configuration, compatible with single bus, double bus, and sectionalized bus connection methods
Typical Application Scenarios
10kV/35kV/110kV Substation High and Medium Voltage Busbar Interval Protection
Power Plants, Metallurgy, Chemical Industry, Rail Transit, etc. Self-owned Substation Systems
Required to quickly trip out bus short circuit faults and ensure the stability of the power grid distribution system
Derivative Models of the Same Series
1MRK004822-BB: REB670 with the same hardware but different software configuration version
Suffix BC represents hardware + firmware customized version. It cannot be directly substituted across suffixes. It is necessary to verify the protection configuration program
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