GE Industrial Solutions Arc Vault Protection System - Manual (Page 33)

DEH-41483 Rev. 3 Arc Vault™ Protection System
Testing and inspection
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SECTION 6. TESTING AND INSPECTION
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
Risk of shock. The equipment must be completely de-
energized while the tests are in progress. Failure to do
so may result in death or serious injury.
Directions for testing relays, instruments, and meters are
given in the instruction book furnished for each device. The
proper settings of the protective relays and Arc Vault trip
units 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. When the equipment is
shipped from the factory, the time dial of all inverse-time
induction disc relays (i.e., IFC types) is set to zero to prevent
contact bounce during transportation.
NOTICE
The trip setting adjustments of the relay for each Arc
Vault may be at any setting when shipped from the
factory and must be correctly set prior to energizing
the equipment.
General instructions for setting the relays are given in Arc
Vault Relay Controller page 33.
The extent of the tests on the equipment as a whole will
depend on the type and function of the equipment. Tests
which should be performed, however, include Arc Vault
operation, and switchgear meggering, phasing, and
grounding checks.
If local codes demand a high potential test, or the
purchaser wishes to make these 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.
CAUTION
Potential and control power transformers must be
disconnected during high-voltage testing.
Table 6-1 Switchgear test voltage
Switchgear
Voltage Rating
ANSI
Test Voltage,
AC RMS
Field
Test Voltage,
AC RMS
600V
480V
2200V
1960V
1650V
1470V
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.
Test
The compartment housing the Arc Vault has a TEST position
in which the 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 Arc
Vault device 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 Arc Vault device and should therefore
be used only for testing Arc Vault device operation.
Once in the TEST position the device can be tested by
pressing the “Press to Charge” button. The indicators
directly above the button will show the state of the device.
Red light - indicated not charged
Yellow light – indicates charging or discharging this may
take a few seconds
Green light – indicated fully charged
Once the green light is lit, a test fire of the unit can be
performed by turning the momentary “Test Switch” to the
test position. You may hear the plasma gun internal to the
device discharge. You will see the indicator lights change
state and the “Event Alarm” yellow “pop out” indication
extract.