Siemens 7UM6215 Generator Protection Relay

Feature & Principle

It belongs to Siemens SIPROTEC 4 7UM62 series comprehensive protection relay. It samples multi-channel current and voltage signals, provides generator differential protection, directional overcurrent, sensitive earth fault, thermal overload, negative sequence unbalance, over/under voltage, over/under frequency and out-of-step protection. Built-in CFC continuous function chart programmable logic for flexible interlock logic configuration. It supports breaker trip/close control, event log and oscillographic fault recording. Multiple communication protocols connect SCADA system, parameter setting and fault diagnosis via DIGSI 4 software. This model is phased out and widely used as replacement spare for old power plant switchgear.

Specifications

Model: 7UM6215 Brand: Siemens Series: SIPROTEC 4 Main protection: Generator differential, overcurrent, earth fault, overload, negative sequence, voltage & frequency protection Logic: CFC programmable function chart Display: Graphic LCD Communication: IEC61850, PROFIBUS DP, Modbus I/O: Configurable binary inputs and relay outputs Mounting: Flush panel mount Power supply: 110~250VDC / 115~230VAC Application: Hydropower, diesel generator, gas turbine, large motor and distribution transformer protection cabinet Certification: CE, IEC60255

Components & Diagnostics

AC sampling unit, main CPU, graphic display module, communication interface chip, relay output matrix, watchdog circuit, status LED indicators. Common faults: communication offline, measurement drift, false tripping, differential imbalance alarm, power supply failure.

Product Brief

7UM6215 protection relay, Siemens SIPROTEC 4 generator and motor comprehensive protection spare widely used for power station switchgear overhaul and replacement.