Output relay – groups 9, 10 and 11, Dc power is removed from the trip unit, Modbus command 112 off is sent to the trip unit – GE Industrial Solutions EntelliGuard TU Trip Units User Manual
Page 41: Digital input configuration, Inputs can be assigned functions as follows, Current alarms
DEH-4567B
EntelliGuard TU Trip Units: UL/ANSI Models
Setting up the Trip Unit
©2012 General Electric All Rights Reserved
31
4.
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 relay also drops
out.
5.
If both GF Trip and Alarm elements trigger the relay, it
will latch, requiring reset.
OUTPUT RELAY – GROUPS 9, 10 AND 11
Output Relay configuration Groups 9, 10, and 11 (IEC
devices only) link the relay to the REF Trip, SEF Trip, and UEF
Earth Fault Trip protection functions, respectively.
1.
If the associated Earth Fault Tripping element operates,
the Output Relay is latched on.
2.
The Output Relay will not drop out if the tripping
element falls out of pickup.
3.
The Output Relay will remain latched after the 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.
DIGITAL INPUT CONFIGURATION
Digital Inputs are available as options on many different
breakers.
The number of available inputs varies by circuit breaker.
Power Break, AKR, and WavePro breakers provide one
digital input.
EntelliGuard G provides two digital inputs. The number of
inputs available matches the number of screens visible on
the trip unit
Inputs can be assigned functions as follows:
• RELT – if the RELT option is installed, INPUT 1 is
automatically and permanently assigned to RELT
activation.
• OFF – activating the input does not produce any
response.
• TRIP – the breaker will be commanded to trip on receipt
of a valid input signal.
• RESET – any latched relay outputs are unlatched on
receipt of a valid input signal.
CURRENT ALARMS
Current Alarms are standard on every UL and ANSI GTU
trip unit.