GE Industrial Solutions Entellisys Low Voltage Switchgear - Manuel (Page 40)

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6. Testing & Inspection
6-1 General
After the equipment has been installed and all
connections made, it must be tested and inspected
before it is put in service. Although the equipment and
devices have been tested at the factory, a final field test
must be made to be sure that the equipment has been
properly installed and that all connections are correct.
WARNING: The equipment must be completely de-
energized while the tests are in progress.
ADVERTISSEMENT: L’équipement doit être
complètement désamorcé lorsque l’on procède à des
tests.
Directions for testing Entellisys instrumentation is
provided in DEH-501 (Entellisys System User’s Manual)
and DEH-233 (Entellisys System Test Kit User’s Manual.)
The proper settings of Entellisys instrumentation are
normally determined from a complete power system
coordination study performed by the purchaser or their
consultant; therefore, the settings of these devices must
be made by the purchaser.
NOTE: The trip setting adjustment of the EntelliGuard
Messenger for each circuit breaker may be in any
position when shipped from the factory and must be
correctly positioned prior to energization of the
equipment.
NOTE: Les ajustements des réglages du disjoncteur
peuvent être en n’importe quelle position lorsque
celui-ci est expédié de l’usine et ils doivent être
positionnés correctement avant que l’équipement ne
soit mis sous tension.
The extent of the tests on the equipment as a whole will
depend on the type and function of the equipment. Tests
that should be performed, however, include circuit
breaker operation, and switchgear meggering, phasing,
and grounding checks.
High-potential tests to check the integrity of the
insulation are not necessary if the installation
instructions are carefully followed. If local codes demand
this test, or the purchaser wishes to make high-potential
tests, the voltage should not exceed 75 percent of the
IEEE factory test voltage.
For the power circuit, the IEEE factory test voltage is two
times switchgear rating plus 1,000 volts. See Table 6-1.
Potential and control power transformers must be
disconnected during high-voltage testing.
Switchgear
Voltage
Rating
ANSI
Test Voltage,
ac RMS
Field
Test Voltage,
ac RMS
600V
480V
240V
2200V
1960V
1480V
1650V
1470V
1110V
Table 6-1
6-2 Key Interlocks
After initial installation of the switchgear equipment, all
necessary interlock keys should be inserted into the
appropriate locks and all spare keys should be stored in
a location in accordance with the owner's established
procedures.
CAUTION: Refer to the key interlock schematic
included in the summary furnished with the
equipment to determine the sequence of operation
and the correct number of operating keys required.
This precaution is necessary since the improper use of
spare keys will defeat the interlocking scheme.
ATTENTION: Référez-vous au schéma des clés de
verrouillage inclus au sommaire fourni avec
l’équipement pour déterminer les séquences
d’opération et le nombre correct de clés d’opération
requises. Cette précaution est nécessaire étant donné
qu’un mauvais usage des clés de réserve rendra
inopérant le programme de verrouillage.
6-3 Breaker Operation Test
All compartments housing EntelliGuard circuit breakers
have a TEST position in which the breaker primary
contacts are disconnected while the secondary contacts
are still engaged. This TEST position permits complete
testing of the electrical control circuit without energizing
the primary power circuit. When the breaker is first put
into service, its control circuit must be thoroughly tested
while in this position to make sure that all closing and
tripping circuits are complete and functioning properly.
The TEST position is not suitable for inspection and
maintenance of the breaker and should therefore be
used only for testing breaker operation.
Refer to the appropriate breaker instruction manual for
other pre-operational checks on the breakers. See DEH-
41526.
6-4 Entellisys System Test Kit
An Entellisys System Test Kit is required for testing
Entellisys Low Voltage Switchgear functionality. The
system test kit user manual is DEH-233.
6-5 Final Steps to Be Taken Before
Energizing Equipment
The following steps should be taken before energizing
the equipment:
1. Manually exercise all switches, circuit breakers,
and other operating mechanisms to make certain
they are properly aligned and operate freely.
2. Conduct an electrical insulation resistance test to
make sure the switchgear is free from short
circuits and grounds. This should be done both
phase-to-ground and phase-to-phase with the
switches or circuit breakers both opened and