30
Testing Limitrip Devices
Test—Short Time Delay
1.
Connections to the device as described under the
heading “Connections.” The GRABBER connections are
not needed
2.
Set LONG TIME PICK-UP on “A,” LONG TIME BAND on
4 (all switches open), INSTANTANEOUS on “12X,”
SHORT TIME PICK-UP on “3X,” and SHORT TIME
BAND on 1 (Minimum setting, both switches closed).
3.
Press the START button and adjust the current on 2
amperes or more and then release buttons. In turn,
press the STOP and RESET buttons.
4.
Close the circuit breaker, if desired.
5
Press the START button, the delay on the stop clock
should be 0.07 to 0.170 seconds. See Figure 20.
6.
Repeat for SHORT TIME BANDS of INTERMEDIATE
(Band 3). Compare with Figure 20, The other phases and
different values of current can be tested if desired. Make
current settings as quickly as possible to avoid overheat-
ing.
Bench Test—Limitrip Devices
To bench test Limitrip devices, follow the same procedures
previously indicated for testing on the breaker. The following
adjustments in procedure and comments should be noted:
(The alligator clips are used to connect the test set-cord-set
leads to the Limitrip device for bench testing. (2) Since the
wiring harness is attached to the trip device, the color coding
of the leads still match the color of the banana plug. (3) The
signal circuits share a common ORANGE lead. (4) Connec-
tions can be made using any lead of the color coded groups.
Again, each signal (Orange-Yellow) and all three pair of power
leads (Blue-Green) must be checked
