72
Instruction Booklet
IB022018EN
Effective July 2020
Instructions for the installation and
EATON
www.eaton.com
Section 7: Testing
XGIS switchgear is filled with the SF6 insulating gas in the factory
and tested as a complete system.
Current tests and voltage withstand tests may be conducted without
removing cables or discharging the insulating gas.
7.1 Typical tests
Prior to beginning any testing, confirm that the equipment is
de-energized.
Below is a list of common tests that may be performed on the
XGIS switchgear. Consult Eaton engineering services for more
information.
XGIS test list:
•
Voltage withstand test
•
Main circuit contact resistance (section to section)
•
CTs ratio and polarity
•
PTs ratio and polarity
•
VDS functionality
•
Relay functionality
•
Ground bus continuity check
•
Camera operation if provided (optional equipment)
7.2 Voltage test
In addition to a standard AC power frequency withstand voltage
test that can be performed on the XGIS switchgear, several different
voltage withstand tests can be performed on XGIS switchgear
cables. These include but are not limited to the following tests.
•
DC voltage withstand test
•
Very Low Frequency (VLF) withstand test
Prior to performing any voltage withstand tests the switchgear must
be prepared for voltage withstand testing.
7.2.1 Preparation for voltage withstand test
Prior to beginning preparing the switchgear for voltage
withstand testing, confirm that the equipment is de-energized.
m
CAUTION
FAILURE TO EFFECTIVELY GROUND VOLTAGE DETECTING CABLES L1, L2,
L3 PRIOR TO POWER FREQUENCY WITHSTAND VOLTAGE TESTING OR VLF
VOLTAGE TESTING COULD RESULT IN PERSONAL INJURY OR EQUIPMENT
DAMAGE.
The Voltage Detection System is equipped with four ports at the
front of the device to measure the detected voltage from the
bushings. Three ports are for L1, L2, and L3 voltages, and the fourth
port is a ground connection.
The following procedure must be followed before performing any
voltage withstand testing:
1. Ensure that the voltage detection cables and the ground wire are
securely connected behind the VDS device.
2. Using three wires that are terminated with banana jack at each
end, connect the first wire between L1 port and the ground
port, connect the second wire between L2 and the ground port
and connect the third wire between L3 and the ground port as
shown in
3. After performing the voltage withstand test and before
energizing the switchgear for normal service, remove the three
wires from the front of the voltage detecting device.
Figure 132. VDS grounding.
Prior to performing any voltage withstand test, the voltage
transformers and lightning arresters must be isolated.
When performing a voltage withstand test on the switchgear, the
voltage transformer must be in one of the following states:
1. VT installed and VT disconnect switch grounded, thereby
removing the VT circuit from the PFWV test.
2. VT is removed and an insulating plug is installed in the VT
port with the VT disconnect switch connected (see below for
information on how to plug the VT port)
.
3. VT installed, primary VT fuse is removed, low voltage VT
secondary circuit open (fuse removed or breaker open), and
VT disconnect switch closed. In this case, the PFWV cannot
exceed the field test level for the given service voltage (cannot
perform PFWV test at type test levels for this option).
