GE Industrial Solutions WavePro - Manuel (Page 15)

Power+™ Trip Units
Chapter 3. Trip Unit Status
9
3–1 Target Module
Trip Unit status information is provided by the optional
target module. 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 target module is shown in Figure 12.
Target modules are available with or without ground-fault
trip indication. If a Trip Unit is ordered without a target
module, a blank insert is installed in the Trip Unit slot.
Catalog numbers are listed in Table 11.
NOTE: The target modules that include ground-fault trip
indication do not provide the ground-fault protection
function. If ground-fault protection is required, a
ground-fault-equipped rating plug must be installed in
the Trip Unit.
NOTE: Les modules à voyants lumineux (target) qui
incluent une indication de déclenchement d’un défaut
de mise à la terre ne sont pas équipés d’un fonction de
protection d’un défaut de mise à la terre. Si une telle
fonction est requise, un calibreur mini d’une fonction de
protection d’un défaut de mise à la terre doit être installé
dans le déclencheur.
Figure 12. Target module.
Catalog No. Description
TARGET00 Blank insert
TARGET01 Without ground fault target
TARGET02 With ground fault target
Table 11. Target Module catalog numbers.
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 (this LED is only present on catalog
number TARGET02 and is operable only if a rating
plug with ground fault is installed in the Trip Unit).
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 Battey 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.