GE EntelliGuard G - Protective Relays; Relay Functions; Voltage Unbalance Relay

DET-653C EntelliGuard
®
G Circuit Breaker Application Guide
24-May-12 Section 3. EntelliGuard
®
TU Trip Unit System
©2012 General Electric All Rights Reserved
30
Table 3.19. Relay Functions Available in EntelliGuard G Circuit Breakers with EntelliGuard TU Trip Units
Functions
Trip
Alarm
Display
Output
Contact
2
Serial
Comm.
Output
3
1
2
Dedicated
Protective
Voltage Unbalance
yes yes yes yes yes
X
X
-
Under Voltage
yes yes yes yes yes
X
X
-
Over Voltage
yes
yes
yes
yes
yes
X
X
-
Current Unbalance
yes yes yes yes yes
X
X
-
Power Reversal
yes yes yes yes yes
X
X
-
Status
Current Level Alarm, 2 Settings Available
no
yes
yes
yes
yes
X
X
-
Health Indication (Bad)
no yes yes yes yes
X
X
-
Health Indication (Good)
no yes yes yes yes
X
X
-
RELT ON Status
3
no no yes yes yes
X
-
-
Ground Fault Alarm Status
no
no
yes
yes
yes
X
X
-
ZSI Output /Input
no no yes yes yes
-
-
X
Diagnostics
Trip Target
no no yes no yes
- - -
Trip Information
no no yes no yes
- - -
Trip Counter
no no yes no yes
- - -
Event Logging (Trips, Alarms, I/O)
no no yes no yes
- - -
Waveform Capture
no no yes no yes
- - -
Metering
Current (Phases A, B, C, N)
no no yes no yes
-
-
-
Voltage (Phase A, B, C)
1
no
no
yes
no
yes
-
-
-
Energy (kWh, Total)
no no yes no yes
-
-
-
Real Power (Watts, Per Phase and Total)
no no yes no yes
-
-
-
Apparent Power (Watts, Per Phase and Total)
no no yes no yes
-
-
-
Reactive Power
no no yes no yes
-
-
-
1 User set to PH-N or PH-PH.
2 Output contacts are low signal (Hi-Fi).
3 When top unit has RELT, output 1 is dedicated to RELT ON status.
Relay Functions
The EntelliGuard TU offers various protective and alarm relay
functions that may be displayed on the LCD screen,
assigned contact outputs or communicated serially (Table
3.19).
Protective Relays
Protection relays may be set by the user to alarm, trip the
circuit breaker or both. Alarms and trips are displayed on the
local LCD trip and communicated serially. Alarms may also
be assigned to one of two output contacts. The Trip Alarm
settings are independently set for each relay function.
Voltage-Unbalance Relay
This function compares the highest or lowest phase voltage
with the average of all three phases and initiates a trip if the
difference exceeds the set point. The true RMS voltage is
computed for each phase (Table 3.20).
Table 3.20. Voltage Unbalance Settings
Setting
Option
Voltage
unbalance pickup
Adjustable from 10% to 50% in
increments of 1%.
Voltage
unbalance delay
User adjustable from 1sec to 15sec in
increments of 1sec. Setting this value to
zero (0) will disable the relay.