3
Feeder Terminal REF 542plus
Features • Real-time multifunction protections and
switchgear controls:
- protections
- measurements
- controls
- monitoring and diagnosis
- power quality functions
- communication
- self diagnosis
• Task separation for implemented protec-
tions and control scheme modifications
• Flexible installation variations due to sepa-
rated HMI and base unit
• Large multilingual LCD display for single-
line diagram, text messages and menu
texts
• Calculated primary quantities include:
- maximum and mean currents in the set-
table monitoring period 0-30 min
- sum of interrupted currents
- operating time
- number of switching cycles
• Spring charging time supervision
• Trip coil supervision
• Binary input and output modules to inter-
face with external processes
• Analog input module for primary current
and voltage signals:
- analog transformers
- non-inductive sensors
• Optional analog input module 4-20 mA
• Optional analog output module 0(4)-20 mA
• Optional communication module for the
substation automation system
• Ethernet interface for embedded web
server
• Optical input port for time synchronization
• Part of the ABB Distribution Automation
system
General The Feeder Terminal REF 542plus is a com-
pact protection, control, measurement and
supervision terminal for the power distribu-
tion system. The same terminal can be used
for feeder, transformer and motor protection
and control, or solely for switchgear control.
The terminal features an impressive range of
protection and management functions readily
available for adapting the unit to the intended
application. The versatility of the REF
542plus terminal makes it a given solution for
any air or gas insulated distribution substa-
tion switchgear as shown in figure 1 and in
figure 2.
A050395
Fig. 1 REF 542plus installed in gas-insulated switchgear (GIS).
1MRS756269
Issued: January 2007
Status: New
Version B/30.07.2007
Data subject to change without notice
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