GE EntelliGuard G User manual

DEH41480
Test Cabinet (Inspection Box)
for Testing Accessories on Manually and
Electrically Operated EntelliGuard G™ Low Voltage
Circuit Breakers
Instructions
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EntelliGuard GTM Breaker Test Cabinet
Table of Contents
Section 1. Introduction
1-1 Introduction........................................................................................................................................................................................ 6
1-2 Safety.................................................................................................................................................................................................... 6
1-3 Maintenance...................................................................................................................................................................................... 6
Section 2. Receiving, Handling & Storage
2-1 Receiving ............................................................................................................................................................................................. 7
2-2 Handling .............................................................................................................................................................................................. 7
2-3 Storage................................................................................................................................................................................................. 7
Section 3. Description & Principals of Operation.................................................................................................................................... 8
Section 4. Installation....................................................................................................................................................................................................... 9
Section 5. Maintenance................................................................................................................................................................................................... 9
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EntelliGuard GTM Breaker Test Cabinet
List of Figures
1. EntelliGuard GTM Test Cabinet .......................................................................................................................................................................... 8
2. Test Cabinet Schematic Diagrams .............................................................................................................................................................. 10
3. Test Cabinet Internal Wiring Diagram........................................................................................................................................................ 11
THESE INSTRUCTIONS ARE INTENDED FOR USE BY QUALIFIED PERSONNEL FOR INSTRUCTION AND MAINTENANCE PURPOSES.
REPRODUCTION IN WHOLE OR IN PART IS NOT PERMITTED WITHOUT THE EXPRESS PERMISSION OF GENERAL ELECTRIC.
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EntelliGuard GTM Breaker Test Cabinet
Section 1. Introduction
1-1 Introduction
This manual provides the information needed by the user
to properly install, operate and maintain the Test Cabinet.
1-2 Safety
Each user must maintain a safety program for the
protection of personnel, as well as other equipment, from
the potential hazards associated with electrical
equipment.
The following requirements are intended to augment the
user’s safety program, but NOT supplant the user’s
responsibility for devising a complete safety program.
The following basic industry practiced safety
requirements are applicable to all major electrical
equipment such as switchgear or switchboards. GE
neither condones nor assumes any responsibility for
practices which deviate from the following:
1. ALL CONDUCTORS MUST BE ASSUMED TO BE
ENERGIZED UNLESS THEIR POTENTIAL HAS BEEN
MEASURED AS GROUND AND SUITABLE GROUNDING
CONDUCTORS HAVE BEEN APPLIED TO PREVENT
ENERGIZING. Many accidents have been caused by
back feeds from a wide variety of sources.
2. Although interlocks to reduce some of the risks are
provided, the individual’s actions while performing
service or maintenance are essential to prevent
accidents. Each person’s knowledge; his mental
awareness; and his planned and executed actions
often determine if an accident will occur. The most
important method of avoiding accidents is for all
associated personnel to carefully apply a thorough
under-standing of the specific equipment from the
viewpoints of its purpose, its construction, its
operation and the situations that could be
hazardous.
All personnel associated with installation, operation and
maintenance of electrical equipment, such as power
circuit breakers and other power handling equipment,
must be thoroughly instructed, with periodic retraining,
regarding power equipment in general as well as the
particular model of equipment with which they are
working. Instruction books, actual devices and
appropriate safety and maintenance practices such as
OSHA publications, National Electric Safety Code (ANSI
C2), the National Electric Code, and National Fire
Protection Association (NFPA) 70B Electrical Equipment
Maintenance must be closely studied and followed.
During actual work, supervision should audit practices to
assure conformance.
1-3 Maintenance
Excellent maintenance is essential for reliability and
safety of any electrical equipment. Maintenance
programs must be tuned to the specific application, well
planned and carried out consistent with both industry
experience and manufacturer’s recommendations. Local
environment must always be considered in such
programs, including such variables as ambient
temperatures, extreme moisture, number of operations,
corrosive atmosphere or major insect problems and any
other unusual or abusive condition of the application.
One of the critical service activities, sometimes neglected,
involves the calibration of various control devices. These
monitor conditions in the primary and secondary circuits,
sometimes initiating emergency corrective action such
as opening or closing circuit breakers. In view of the vital
role of these devices, it is important that a periodic test
program be followed. As was outlined above, it is
recognized that the interval between periodic checks will
vary depending upon environment, the type of device
and the user’s experience. It is the GE recommendation
that, until the user has accumulated enough experience
to select a test interval better suited to his individual
requirements, all significant calibrations be checked at an
interval of one to two years.
To accomplish this, some devices can be adequately
tested using test sets. Specific calibration instructions on
particular devices typically are provided by supplied
instruction books.
Instruction books supplied by manufacturers address
components that would normally require service or
maintenance during the useful life of the equipment.
However, they cannot include every possible part that
could require attention, particularly over a very long
service period or under adverse environments.
Maintenance personnel must be alert to deterioration of
any part of the supplied switchgear, taking actions, as
necessary to restore it to serviceable status.
Industry publications of recommended maintenance
practices such as ANSI/NFPA 70B, Electrical Equipment
Maintenance, should be carefully studied and applied in
each user’s formation of planned maintenance.
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EntelliGuard GTM Breaker Test Cabinet
Section 1. Introduction (cont.)
Some users may require additional assistance from GE in
the planning and performance of maintenance. GE can
be contracted to either undertake maintenance or to
provide technical assistance such as the latest
publications.
The performance and safety of all equipment may be
compromised by the modification of supplied parts or
their replacement by non-identical substitutes. All such
design changes must be qualified to ANSI/IEEE Standard
C37.59.
The user should methodically keep written maintenance
records as an aid in future service planning and
equipment reliability improvement. Unusual experiences
should be promptly communicated to GE.
Section 2. Receiving, Handling and Storage
2-1 Receiving
Each test cabinet is carefully inspected before shipment.
Immediately upon receipt of the test cabinet, an
examination should be made for any damage sustained in
transit. If damage or rough handling is evident, a damage
claim should be filed immediately with the transportation
company and the nearest General Electric Sales Office
should be notified.
It is expected that due care will be exercised during the
unpacking and installation of the test cabinet so that no
damage will occur from careless or rough handling, or from
exposure to moisture or dirt.
2-2 Handling
Normal care in handling the test cabinet will result in a
trouble-free installation and long testing life.
2-3 Storage
It is recommended that the test cabinet be put immediately
in its permanent location. If this is not possible, the following
precautions should be taken to assure proper storage of the
test cabinet.
1. The test cabinet should be stored in a clean location,
free from corrosive gases or fumes; particular care, for
example, should be taken to protect the equipment
from moisture and dust, as this combination has a very
corrosive effect on many parts.
2. If the test cabinet is stored for any length of time, it
should be inspected periodically to see that rusting has
not started and to insure good mechanical condition.
Should the cabinet be stored under unfavorable
atmospheric conditions, it should be cleaned and dried
out before being placed in service.
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EntelliGuard GTM Breaker Test Cabinet
Section 3. Description and Principles of Operation
The test cabinet, catalog no. GTC250 (Fig.1) is used to
operate an EntelliGuard GTM Drawout low voltage power
circuit breaker that has been removed from the metal-
enclosed equipment. It provides a convenient means of
accessing the electrical close and trip circuits of the
breaker during maintenance and inspection procedures.
Control voltages must match the rating of charge, close,
and trip circuits on the breaker.
This unit is designed to be wall or cabinet mounted. It has
a test connector (with green ground wire), a 10-foot wire
bundle, switches for opening and closing and charging
the breaker, and control power switch, all located on the
front of the cabinet.
Separate fuse holders and control power indicating lights
are provided for the charge, close, and trip circuits. Lights
are also provided for breaker open and close indication.
Inside the unit is a terminal block for connecting the
control power source(s) to the test cabinet. Four holes are
provided on the back of the test cabinet for mounting
using 3/8-inch hardware (mounting hardware is not
included).
1. Control power input holes
2. Terminal block for control power (inside)
3. Clamp for test connector cable
4. Fuse holders
5. Control power indicating lights
6. CLOSE/OPEN push button switches
7. Close & Trip control power OFF / ON switch
8. Green/Red indicating lights
9. Charging motor control power OFF / ON switch
F
igure. 1. EntelliGuard
G
TM Test Cabinet
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EntelliGuard GTM Breaker Test Cabinet
Section 3. Description and Principles of Operation (cont.)
CAUTION: The green ground wire and test connector
must be connected to the breaker before the power is
turned on.
OPERATION OF TEST CABINET: (Circuit breaker must be
out of its cubicle)
1. Make sure both CONTROL POWER switches are in the
“OFF” position.
2. Connect the green ground wire to the breaker frame.
3. Plug the TEST CONNECTOR into the breaker
secondary disconnect. Use only the secondary
disconnect on the top left of the breaker (viewed
from the front of the breaker). Make sure the TEST
CONNECTOR is fully engaged into the breaker
secondary disconnect.
4. Turn the CLOSE & TRIP power switch to the “ON”
position. The trip power and close power indicating
lights should be illuminated. If any of the indicating
lights fail to illuminate, check the appropriate control
power fuse(s) located at top. If the fuses are not
blown, check the lamp in the indicating light
assembly.
5. Move the CHARGE MOTOR CONTROL POWER switch
to the “ON” position to charge the closing springs.
The charge control power indicating light should be
lit. The charge switch can remain in the “ON” position
during testing.
6. The circuit breaker close and trip circuits can now be
exercised by operating the CLOSE and OPEN
switches on the test cabinet. Operation of the
breaker auxiliary switch can be verified by observing
the RED and GREEN indicating lights on the test
cabinet. When breaker contains a command close
coil (ccc) the operations as follows. For closing rotate
and hold the close switch to the right. Push the
green button on the breaker. This button is located
between the Close & Trip buttons when a command
close coil is present.
7. Undervoltage coil 1 operation (when equipped) can
be verified by rotating UV1 switch to the left.
8. Shunt trip coil 2 operation (when equipped) can be
verified by rotating the TRIP2 / UV2 switch to the left.
9. Undervoltage coil 2 operation (when equipped) can
be verified by rotating switch from right position to
center. When the breaker is equipped with UV2, the
TRIP2 / UV2 switch must be turned to right position
before closing breaker or the breaker will go trip free.
10. When breaker testing is complete, turn the CONTROL
POWER and CHARGE switches to the “OFF” position.
Pull the TEST CONNECTOR out of the breaker
secondary disconnect. Remove the green ground
wire from the breaker frame.
11. Discharge the charging spring before attempting to
install the breaker into its cubicle.
Section 4. Installation
The test cabinet should be installed on the wall at a
location where maintenance and testing of the breaker
can be conveniently done.
Conduits may be installed for cables to supply control
power for testing. Two 1-inch diameter holes are located
on the left side to accommodate wiring. Refer to the
wiring diagram in Figure 2 for control power connections
and jumper positions.
Section 5. Maintenance
Aside from keeping the unit clean and dry, the most
important thing is to return the clamp to the cabinet area
when not connected to a breaker.
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EntelliGuard GTM Breaker Test Cabinet
Figure 2 Test Cabinet Schematic Diagrams
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EntelliGuard GTM Breaker Test Cabinet
Control
Power
Connection
Figure 3 Test Cabinet Internal Wiring Diagram
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These instructions do not purport to cover all details or variations in equipment nor to provide for every possible
contingency to be met in connection with installation, operation or maintenance. Should further information be desired
or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, the matter should
be referred to the General Electric Company.
GE
______________________________________________________
General Electric Company
Switchgear Business Department
510 East Agency Road
West Burlington, Iowa 52655
DEH-41480 ©2010 General Electric Company