GE Industrial Solutions EntelliGuard TU Trip Units - Manual (Page 39)

DEH-4567B EntelliGuard TU Trip Units: UL/ANSI Models
Setting up the Trip Unit
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POWER REVERSAL
Power Reversal is part of the optional protective relay
feature. If protective relaying is not installed on the trip unit,
this screen will not appear.
• Pickup – settable between 10kW and 990kW, in 10kW
steps
• Band – delay, from 1 to 15 seconds, between pickup
and trip. Setting the Band to OFF disables the relay
OUTPUT RELAY – GROUP 1
Output Relay configuration Group 1
links the Output Relay to the GF Sum
Alarm and GF CT Alarm (ONLY)
protection functions.
If the GF Sum or GF CT Alarm
elements pick up, the Output Relay
turns on, but does not latch. When
the GF alarm element drops out of
pickup, the Output Relay also drops
out.
You can assign only one function per
output relay.
If a relay assigned to GROUP 1 is ON, it cannot be reset by
command.
OUTPUT RELAY – GROUP 2
Output Relay configuration Group 2 links the relay to the
overcurrent trip functions (LT, ST, IOC, GF, CT GF)
1. If an Overcurrent Tripping element operates, the Output
Relay is latched on.
2. The Output Relay will remain latched after the tripping
element drops out until one of the following occurs:
• DC power is removed from the trip unit.
• The RESET RELAYS command is issued from the
STATUS menu on the trip unit LCD. Reset is
accomplished by pressing the ENTER button from
that screen.
• Modbus command 112 OFF is sent to the trip unit.
• An Input has been mapped to the “Reset Relays”
function, and is activated.
NOTICE
Although it is not explicitly mentioned here, RELT will
also latch an output relay mapped to Group 2. The RELT
trip will generate an Instantaneous trip event that will
trigger and latch this relay.
OUTPUT RELAY – GROUP 3
Output Relay configuration Group 3 links the relay to the
Protective Relay trip functions (Voltage Unbalance, Under
Voltage, Over Voltage, Current Unbalance, Power Reversal).