3
Feeder Terminal REF 541, REF 543, REF 545.
Features • Feeder terminal for protection, control,
measurement and supervision of medium
voltage networks.
• Voltage and current measurement via con-
ventional measuring transformers or cur-
rent sensors and voltage dividers.
• Fixed human-machine interface including a
large graphic display, or an external display
module for flexible switchgear installation.
• Protection functions including e.g. non-
directional and directional overcurrent and
earth-fault protection, residual voltage,
overvoltage and undervoltage protection,
thermal overload protection, CBFP and
auto-reclosing.
• 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-to-
phase and phase-to-neutral voltages, neu-
tral current and residual voltage, frequency,
power factor, active and reactive power
and energy.
• Advanced power quality measurement
capabilities. Total harmonic distortion
(THD) measurements for both currents and
voltages. Measurement for short duration
voltage variations like sags, swells and
short interruptions.
• Condition monitoring including circuit-
breaker condition monitoring, trip circuit
supervision and internal self-supervision of
the feeder terminal.
• Time synchronization via binary input. Syn-
chronization pulse once per second or
once per minute.
• Fault locator for short circuits in all kinds of
network and for earth-faults in effectively
earthed and low resistance/low reactance
earthed networks.
• Additional functions including synchro-
check, frequency protection, capacitor
bank protection and control.
• RTD/analogue module for temperature
measurement, current/voltage measure-
ment and mA-outputs.
• Communication over three communication
interfaces: one for local communication
with a PC and two for simultaneous dual
port communication for e.g. a substation
communication system and a substation
monitoring system.
• Selectable function block naming: ANSI
device numbers, IEC symbols or ABB nam
-
ing.
• Support for IEC 61850 protocol through the
SPA-ZC 400 adapter.
• Support for Profibus-DPV1 protocol
through the SPA-ZC 302 adapter
• Part of the ABB Distribution Automation
system.
Fig. 1 Setting group example window.
1MRS750443-MBG
Issued: June 1999
Status: Updated
Version: G/28.05.2010
Data subject to change without notice
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