8
Instruction Leaflet
IL29C109J
Effective November 2013
Installation Instructions for ND, HND, NDC, CND,
CHND, CNDC Circuit Breakers with Digitrip OPTIM
Trip Unit and Powernet, and/or Zone Interlock
EATON CORPORATION
www.eaton.com
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 RMS trip units can be field
tested 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
GROUND FAULT TEST RECORD FORM
round Fault Test Records should be Retained by Those in Charge of the Building's
lectrical Installation in order to be available to the Authority having Jurisdiction
Test Date
Circuit
Breaker
Number
Results
Tested By
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 RMS trip unit.
General Test
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 EQUIPMENT. ALWAYS TURN OFF
DUCTING TESTS.
POWER SUPPLYING BREAKER BEFORE CON-
Source
N
Load
Current Limiting
Resistor
(if required)
Figure 4-
1
Typical Performance Test Record Form
Figure 4-2 Connections for Ground Fault Trip Test
