![background image](http://html.mh-extra.com/html/ge/ur-series/ur-series_instruction-manual_131898066.webp)
3-12
L60 Line Phase Comparison System
GE Multilin
3.2 WIRING
3 HARDWARE
3
An LED on the front of the control power module shows the status of the power supply:
Figure 3–13: CONTROL POWER CONNECTION
3.2.4 CT AND VT MODULES
A CT/VT module may have voltage inputs on channels 1 through 4 inclusive, or channels 5 through 8 inclusive. Channels 1
and 5 are intended for connection to phase A, and are labeled as such in the relay. Likewise, channels 2 and 6 are intended
for connection to phase B, and channels 3 and 7 are intended for connection to phase C.
Channels 4 and 8 are intended for connection to a single-phase source. For voltage inputs, these channel are labelled as
auxiliary voltage (VX). For current inputs, these channels are intended for connection to a CT between system neutral and
ground, and are labelled as ground current (IG).
Verify that the connection made to the relay nominal current of 1 A or 5 A matches the secondary rating of
the connected CTs. Unmatched CTs may result in equipment damage or inadequate protection.
CT/VT modules may be ordered with a standard ground current input that is the same as the phase current input. Each AC
current input has an isolating transformer and an automatic shorting mechanism that shorts the input when the module is
withdrawn from the chassis. There are no internal ground connections on the current inputs. Current transformers with 1 to
50000 A primaries and 1 A or 5 A secondaries may be used.
The above modules are available with enhanced diagnostics. These modules can automatically detect CT/VT hardware
failure and take the relay out of service.
CT connections for both ABC and ACB phase rotations are identical as shown in the
Typical wiring diagram
.
The phase voltage channels are used for most metering and protection purposes. The auxiliary voltage channel is used as
input for the synchrocheck and volts-per-hertz features.
The L60 uses a special CT/VT module not available on other UR-series relays. This type 8P module has four current inputs
and special communications inputs/outputs for interfacing with PLCs. The communications interface requires an external
DC source (station battery) to drive inputs/outputs as shown in the
L60 channel communications
section in this chapter.
LED INDICATION
POWER SUPPLY
CONTINUOUS ON
OK
ON / OFF CYCLING
Failure
OFF
Failure
AC or DC
NOTE:
14 gauge stranded
wire with suitable
disconnect devices
is recommended.
Heavy copper conductor
or braided wire
Switchgear
ground bus
UR-series
protection system
FILTER SURGE
–
+
LOW
+
HIGH
B8b B8a B6a B6b B5b
CONTROL
POWER
827759AA.CDR
—
+
OPTIONAL
ETHERNET SWITCH
AC or DC
GND
CAUTION
Summary of Contents for UR series
Page 2: ......
Page 4: ......
Page 12: ...xii L60 Line Phase Comparison System GE Multilin TABLE OF CONTENTS ...
Page 32: ...1 20 L60 Line Phase Comparison System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 54: ...2 22 L60 Line Phase Comparison System GE Multilin 2 2 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Page 438: ...7 8 L60 Line Phase Comparison System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Page 478: ...8 40 L60 Line Phase Comparison System GE Multilin 8 3 FAULT LOCATOR 8 THEORY OF OPERATION 8 ...
Page 502: ...A 10 L60 Line Phase Comparison System GE Multilin A 1 PARAMETER LIST APPENDIXA A ...
Page 584: ...B 82 L60 Line Phase Comparison System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Page 622: ...D 10 L60 Line Phase Comparison System GE Multilin D 1 PROTOCOL APPENDIXD D ...
Page 634: ...E 12 L60 Line Phase Comparison System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...
Page 642: ...F 8 L60 Line Phase Comparison System GE Multilin F 3 WARRANTY APPENDIXF F ...