GE Industrial Solutions ProTrip Trip Units for Low-Voltage - Manual (Page 14)

ProTrip™ Trip Units
Chapter 3. Trip Unit Status
8
3–1 Target Module
Trip Unit status information is provided by the target
module, shown in Figure 12. This module indicates
whether a breaker trip was caused by a short circuit, an
overload, or a ground fault, as well as whether the Trip
Unit is functioning properly. The catalog number of the
target module is TARGET02P.
Figure 12. Target module.
3–2 Functions
The front of the target module contains two push buttons
and either four or five LEDs. The following functions are
provided by the target module.
Trip Targets
To determine the condition causing a breaker trip, press
the VIEW button. One of the three target LEDs will light,
as follows:
SC – Short circuit (instantaneous or short-time trip)
OVL – Overload (long-time trip)
GF – Ground fault
The RESET button clears the trip target indication.
Long-Time Pickup Status
Whenever the circuit breaker is carrying at least 95% of
the long-time pickup current (C), the LTPU (STATUS)
LED begins to blink. Above 100% of the long-time pickup
current, the LED is lit continuously, indicating an
imminent overload trip.
Battery Test
If the breaker has not tripped or if the trip target has been
cleared, pressing the VIEW button performs a battery test.
The BAT LED will light if the batteries are okay. If the BAT
LED is dim or does not light, replace the batteries as
described in Chapter 4, Maintenance and Trouble-Shooting.
Note that the only function of the Target Module batteries
is to power the LEDs; they have no effect on Trip Unit
operation and are not required to store targets or for any
protection functions.
Health Monitor
The Trip Unit can be tested for proper functioning if the
Trip Unit is powered by one of the following sources:
• A Test Kit (catalog number TVRMS2) is plugged
into the jack on the front of the rating plug.
• A Portable Battery Pack (catalog number TVPBP) is
plugged into the jack on the front of the rating plug.
• The breaker is carrying a load current of at least 20%
of its current sensor rating.
• External +24 Vdc control power is connected.
Press and hold the VIEW button for at least five seconds. If
the Trip Unit is operating properly, the LTPU LED will
blink slowly. Note that if the Trip Unit is not powered by
one of the above sources, this test will not give a true
indication of Trip Unit functioning.