8
Instruction Leaflet
IL29C092E
Effective November 2013
Installation Instructions for KD, HKD, KDC, CKD,
CHKD, Circuit Breakers with Digitrip OPTIM
Trip Unit and Powernet and/or Zone Interlock
EATON CORPORATION
www.eaton.com
circuit breaker. If contamination is found, look for the
source and eliminate the problem.
4-2.
Switch circuit breaker to ON and OFF several times
to be sure that the mechanism linkages operate freely
and do not bind. If mechanical linkages do not operate
freely, replace circuit breaker.
4-3.
With the circuit breaker in the ON position, press
the PUSH-TO-TRIP button to mechanically trip the cir-
cuit breaker. Trip, reset, and switch circuit breaker ON
several times. If mechanism does not reset each time
the circuit breaker is tripped, replace the circuit breaker.
4-4.
Check base, cover, operating handle, and handle
barrier, for cracks, chipping, and discoloration. Circuit
breakers should be replaced if cracks or severe discol-
oration is found.
4-5.
Check wire connecting terminals and other type
bus bar connectors for looseness or signs of overheat-
ing. Overheating will show as discoloration, melting, or
blistering of conductor insulation, or as pitting or melting
of conductor surfaces due to arcing. lf there is no evi-
dence of overheating or looseness, do not disturb or
tighten the connections. lf there is evidence of over-
heating, terminations should be cleaned or replaced.
Before re-energizing the circuit breaker, all terminations
and cable should be refurbished to the originally
installed condition.
4-6. Check circuit breaker mounting hardware, and tight-
en if necessary.
4-7. Exposure to certain types of chemicals can cause
deterioration of electrical connections. Check area
where circuit breaker is installed for any safety hazards,
including personal safety and fire hazards and take
required precautionary actions.
Field Testing
Any field testing should be done in accordance with
applicable NEMA Standard. The operation of circuit
breakers with Digitrip OPTIM trip units can be field test-
ed periodically using the hand held OPTIMIZER (see
user manuals).
Performance Testing for Ground Fault Trip Units
Code Requirements
The National Electrical Code under Article 230-95-C
requires that any ground-fault protection system be per-
formance tested when first installed. The test shall be
conducted in accordance with approved instructions
provided with the equipment. A written record of this
test shall be made and shall be available to the authority
having inspection jurisdiction.
Standards Requirements
As a follow-up to the basic performance requirements
stipulated by the N.E.C. as stated above, UL Standard
No. 1053 requires that certain minimum instructions
must accompany each ground fault protection system.
These following statements plus a copy of the test
record form illustrated in Figure
4-1
are shipped with
each Digitrip OPTIM trip unit.
General Test Instructions
The interconnected system shall be evaluated in accor-
dance with the equipment assembler's detailed instruc-
tions by qualified personnel.
The polarity of the neutral sensor connections (if used)
must agree with equipment assembler's detailed instruc-
tions to avoid improper operations following apparently
correct simulated test operations. Where a question
exists, consult the specifying engineer and/or equipment
assembler.
The grounding points of the system shall be verified to
determine that ground paths do not exist that would
bypass the sensors. The use of high-voltage testers
and resistance bridges may be used.
WARNING
THERE
IS A HAZARD OF ELECTRICAL SHOCK OR
BURN WHENEVER WORKING IN OR AROUND
ELECTRICAL EQLIIPMENT. ALWAYS TURN OFF
POWER SUPPLYING BREAKER BEFORE CON-
DUCTING TESTS.
Since Digitrip OPTIM trip units derive their operating
power from the phase currents, and not from the
neutral current, passing current through the neutral
sensor only will not properly test the ground fault
feature.
Using a low-voltage (0-24 volt), high current, ac source.
apply a test current of 125% of the Digitrip OPTIM
Ground Fault Trip Unit pick-up setting through one
phase of the circuit breaker, as shown in Figure 4-2.
This should cause the breaker to trip in less than 1 sec-
ond, and if an alarm indicator is supplied, it should oper-
ate. Reset the breaker and the alarm indicator. Repeat
the test on the other two phases.
If the system is a 4-wire system with
a
neutral current
sensor, apply the same current as described above
