ABB REM545 REM 543 Machine Terminals
• Integrated machine terminals for the protection, control, measurement and supervision of small and medium size generators,
synchronous motors and large asynchronous motors.
• Voltage and current measurement via conventional measuring transformers or current sensors and voltage dividers.
• Fixed man-machine interface including a
large graphic display, or an external display
module for flexible swichgear installation.
• Extended functionality including protection, control, measurement, condition monitoring and communication.
• Non-directional/directional overcurrent/earth-fault protection functions, over-
/undervoltage protection functions and special functions for the protection of motors
and generators, e.g. voltage controlled
overcurrent protection, differential protection with several principles, underexcitation
protection, underimpedance protection
(line back-up prot.), thermal overload protection, protection against unbalanced
load, abnormal frequency protection,
reverse or low-forward power protection
and start-up supervision for motors.
• Control functions including local and
remote control of switching objects with
synchro-check, status indication of the
switching objects and interlockings on bay
and station level.
• Measurement of phase currents, phase-tophase and phase-to-neutral voltages, neutral current and residual voltage, frequency,
power factor, active and reactive power
and energy.
• Optional RTD/mA I/O-module for stator
winding, bearing and ambient temperature
monitoring. Analog mA outputs for interfacing with process control system.
• Condition monitoring including circuitbreaker condition monitoring, trip circuit
supervision and internal self-supervision of
the machine terminal.
• Communication over three communication
interfaces: one for local communication
with a PC and the others for remote communication with a substation control system or with a substation monitoring system.
• Part of the ABB’s Distribution Automation
system.
The REM 543 and REM 545 rotating machine terminals are designed to be used as an
integrated main protection system of generator and generator-transformer units in small
and medium-power diesel, hydroelectric and
steam power plants, etc. The protection of
large and/or important MV synchronous and
asynchronous motors used e.g. in pumps,
fans, mills and crushers during start-up and
normal run forms another application area.
The REM 54_ machine terminals as integrated packages make possible compact
marine environment solutions for unit protection, too
In addition to protection, measurement, control and condition monitoring and general
functions, the machine terminals are provided
with a large amount of PLC functions allowing several automation and sequence logic
functions needed for substation automation to
be integrated into one unit. The data communication properties include SPA bus, LON
bus or MODBUS communication with
higher-level equipment. Further, LON interbay communication, together with PLC functions, minimizes the need for hardwiring
between the machine terminals
