ABB REM545AG228AAAA Generator Protection IED

In stock

The ABB REM545AG228AAAA is a REM 545 series numerical machine protection terminal from the ABB Relion 545 family. It is engineered as the main protection, control, measurement and monitoring unit for small and medium generators, generator-transformer blocks, and large/medium-voltage synchronous & asynchronous motors (pumps, mills, crushers, fans, compressors).

Tags: EMERSON FLOBOSS S600+, EMERSON MMS3210/022-000, EMERSON SLS1508 K2201X1-BA1

SKU: 6125637-1-1-1-2-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1

Key Specifications

Specification	Detail
Brand	ABB
Model / Order Code	REM545AG228AAAA
Series	Relion REM 545 Machine Protection Terminal
Application	Generators, gen-transformer units, MV sync/async motors
CT / VT Inputs	3-phase I (1 A / 5 A), 3-phase V (line-line / line-neutral), residual I
Binary Inputs	25 (config-dependent)
Relay Outputs	18
RTD / Analog	Optional RTD inputs for stator/bearing/ambient temp
Protection Core	Overcurrent, earth fault, diff (opt), thermal, negative-seq, U/F, U/V, excitation, impedance, reverse power
Motor Extras	Stall, locked-rotor, start-count, start supervision
Generator Extras	Loss-of-excitation, under-impedance, reverse/low power, gen-motoring
Control	Breaker control, sync-check, local/remote, PLC logic
Measurement	I, V, P, Q, PF, f, energy, harmonics/disturbance records
Communication	SPA, LON, Modbus (RTU); IEC 61850 via SPA-ZC 400 adapter; optical serial link
HMI	Graphic LCD, detachable for door mounting
Aux Supply	Wide-range DC (order-code dependent, commonly 48–250 VDC or 110/220 VDC)

Product Overview

The REM545AG228AAAA sits in the MV switchgear panel as a single box replacing discrete overcurrent, earth-fault, thermal, voltage, frequency and logic relays. On the generator side it is used as primary protection for diesel/hydro/steam plant gen-sets and gen-transformer blocks. On the motor side it protects critical MV loads where start-up stress and thermal memory matter.

Signal acquisition is via conventional CT/VT or low-power sensors; the terminal samples continuously for oscillography, event logging and sequence-of-events reporting. The detachable graphic HMI allows panel-door mounting while the main body stays on the rack.