Effective 2/2/2001
Page 24
I.L. 70C1037H03
5.3 Functional Field Testing
CAUTION
PERFORMING TESTS WITHOUT THE CUTLER-HAM-
MER-APPROVED TEST KIT MAY DAMAGE THE DIG-
ITRIP UNIT.
5.3.1 Field Test Kit
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.
The test port is located on the front left-hand corner of the
trip unit
(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.
CAUTION
BEFORE PLUGGING A TEST KIT INTO THE TEST
PORT, PLACE THE LTM JUMPER IN THE INACTIVE
POSITION (SEE FIGURE 4.3). AFTER TESTING, RE-
TURN THE LTM JUMPER TO ITS ORIGINAL POSITION.
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 the
current transformer. 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.
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 DISRUPTION
OF SERVICE AND POSSIBLE PERSONAL INJURY,
RESULTING IN THE UNNECESSARY SWITCHING OF
CONNECTED EQUIPMENT.
CAUTION
TESTING A CIRCUIT BREAKER WHILE IT IS IN-SER-
VICE AND CARRYING LOAD CURRENT IS
NOT
RECOM-
MENDED.
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Withdrawn (or Removed) cell positions.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.
Model
Test Kit
Digitrip DT20 family
Test Kit (140D481G02R, 140D481G02RR,
140D481G03, or G04) with Test Kit
Adapter 8779C02G04
