GE Industrial Solutions EntelliGuard TU Trip Units - Manual (Page 30)

EntelliGuard TU Trip Units: UL/ANSI Models DEH-4567B
Protection
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operate the command close coil accessory on the circuit
breaker (remotely closes the breaker).
Table 2-15: Output Configuration
Group # Function Summary Description
1 GF alarm Turns on when GF alarm is
activated.
2 Overcurrent
trip (GF,
INST, LT, ST) Over-voltage trip turns ON the
relay.
7 Reduced
Energy Let-
Through
(RELT) Output relay contact closes when
the RELT pickup is enabled.
3 Protective
relays When protective relay trips the
relay contact closes.
4 Current
alarm 1 Exceeding current alarm pick-up
turns closes the relay contact.
5 Current
alarm 2 Exceeding current alarm pick-up
turns closes the relay contact.
6 *Health
status Relay contact will be closed or
opened depending on the Health
contact setting. (Either normally
open (NO) or normally closed (NC)
set via communication).
BELL ALARM ACCESSORY
Bell Alarm with Lock-out Accessory Configuration Setup
(applies to Power Break II and WavePro Trip Units only)
This defines the types of signals (protection trip, Shunt trip,
Shunt Trip with Lockout, or Under Voltage Release trip) that
activates the Bell Alarm-Alarm Only and Bell Alarm with
Lockout accessories on the Power Break II breaker only.
The customer may enable or disable a different path to
activate these accessories from the different types of trip
signals.
The following settings can be set on the LCD or through
communication for PBII and WavePro breakers:
• Disabled
• Shunt Trip
• UVR Trip
• Over Current Trip
• Protective Relay Trip
• Shunt, UVR
• Shunt, Over Current
• Shunt, Protective Relay
• UVR, Over Current
• UVR, Protective Relay
• Over Current, Protective Relay
• Shunt Trip, UVR, Over Current
• Shunt, UVR, Protective Relay
• Shunt, Over Current, Protective Relay
• UVR, Over Current, Protective Relay
• Shunt, UVR, Over Current, Protective Relay
Settings Description
The following are descriptions of the effects of each
accessory switch when it is enabled:
• If Bell Alarm or Bell Alarm with Lockout is set to Shunt
Trip, an opening generated by a Shunt Trip will cause
the Bell Alarm contacts to change state.
• If Bell Alarm with Lock-out is set to over current trip, a
fault generated by LT, ST, GF, and/or Instantaneous will
cause the Bell Alarm contacts to change state.
Bell Alarm Operation – EntelliGuard G breakers
The EntelliGuard G breaker has a mechanical lockout built
into the breaker’s trip mechanism. The lockout actuator is
always triggered when the flux shifter actuator “trips” the
circuit breaker. The breaker’s mechanical lockout is not
actuated if the breaker is “opened” using the front panel
pushbuttons, or an optional shunt trip accessory.
There are two modes of operation for the Lockout button in
UL & ANSI applications – MANUAL and AUTOMATIC. The trip
unit’s Lockout button configuration is fixed based on the
catalog number of the trip unit. MANUAL or AUTO operation
is fixed at the factory, and cannot be changed. Do not
attempt to rotate the knob as it will damage the locking
mechanism.
In MANUAL mode the breaker’s lockout actuator is allowed
to travel to its “triggered” position. As the lockout trigger
extends from the breaker mechanism following a flux
shifter operation, it pushes the knob on the front of the trip
unit out. At this point the breaker mechanism is “locked
out” and cannot be closed until the mechanical lockout is
manually reset. Reset is accomplished by pushing in the
button on the trip unit until the breaker lockout is reset.
In AUTOMATIC mode the breaker’s mechanical lockout
actuator is physically restrained from traveling to its
“triggered” position by the fixed knob on the trip unit. In
other words, the mechanical lockout is fired when the flux
shifter operates, but the trip unit’s knob “automatically
resets” the lockout so that the breaker can be reclosed
without manual intervention.