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Entellisys Low-voltage Switchgear
Chapter 6. Testing and 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-231 (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 deter-
mine 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-201 or
DEH-202.
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.
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