Test Procedure; When To Test; Self Testing; Functional Field Testing - Eaton Cutler-Hammer Digitrip 1150 Instructions Manual

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5.0 TEST PROCEDURES
5.1 General
WARNING
DO NOT ATTEMPT TO INSTALL, TEST, OR PERFORM
MAINTENANCE ON EQUIPMENT WHILE IT IS ENER-
GIZED. DEATH OR SEVERE PERSONAL INJURY CAN
RESULT FROM CONTACT WITH ENERGIZED EQUIP-
MENT.
DE-ENERGIZE THE CIRCUIT AND DISCONNECT THE
CIRCUIT BREAKER BEFORE PERFORMING MAINTE-
NANCE OR TESTS.
WARNING
ANY TRIPPING OPERATION WILL CAUSE DISRUP-
TION OF SERVICE AND POSSIBLE PERSONAL
INJURY, RESULTING IN THE UNNECESSARY
SWITCHING OF CONNECTED EQUIPMENT.
CAUTION
TESTING A CIRCUIT BREAKER WHILE IT IS IN-
SERVICE AND CARRYING LOAD CURRENT IS NOT
RECOMMENDED.
TESTING OF A CIRCUIT BREAKER THAT RESULTS IN
THE TRIPPING OF THE CIRCUIT BREAKER SHOULD
BE DONE ONLY WITH THE CIRCUIT BREAKER IN
THE TEST OR DISCONNECTED CELL POSITIONS OR
WHILE THE CIRCUIT BREAKER IS ON A TEST
BENCH.

5.2 When to Test

Testing prior to start-up can best be accomplished with
the breaker out of its cell or in the Test, Disconnected, or
Withdrawn (or Removed) cell positions.
NOTE: Since time-current settings are based on desired
system coordination and protection schemes, the protec-
tion settings selected and preset in accordance with
Section 4 should be reset to their as-found conditions if
altered during any routine test sequence.
Courtesy of NationalSwitchgear.com

5.3.1 Self Testing

The Digitrip 1150 provides means via the TEST selection
in the main menu to conduct PHase or GrouND testing in
either a Trip or Nontrip mode. See Appendix D-20 for
pushbutton sequence to conduct the testing. To conduct
this testing as well as viewing setting on the bench a
small Auxiliary Power Module, CAT No. PRTAAPM, is
available for these functions.
This Module is a intermittent duty device that is powered
via 120 VAC, 50/60 Hertz and will plug into the upper right
corner of the product. See Figure 1.1.

5.3.2 Functional Field Testing

CAUTION
PERFORMING TESTS WITHOUT THE CUTLER-
HAMMER-APPROVED TEST KIT MAY DAMAGE THE
DIGITRIP UNIT.
Use the test receptacle to verify a functional load test of a
major portion of the electronic circuitry of the Digitrip and
the mechanical trip assembly of the breaker. The testing
can determine the accuracy of the desired trip settings by
performing Long Delay, Short Delay, and Ground Fault
functional tests. The Cutler-Hammer-approved test kit is
listed below.
Model Test Kit
Digitrip 1150 Test Kit (140D481G02R, 140D481G02RR,
140D481G03, or G04) with Test Kit
Adapter 8779C02G04
The test port is located on the front left-hand corner of the
DT1150 units (see Figure 1.1). To access the port,
remove the plexiglass cover from the front of the circuit
breaker. Using a small screwdriver, gently pry up on the
test port cover to remove this item.
The test kit authorized by Cutler-Hammer for use with the
Digitrip units plugs into the test port of the unit and
provides a secondary injection test that simulates currents
from the current transformers. Existing test kits, styles
140D481G02R, 140D481G02RR, 140D481G03 or G04,
along with the Magnum Test Kit Adapter 8779C02G04,
can be used to test the trip unit and breaker.
I.L. 70C1036H01
Effective 8/18/99