Eaton Power Xpert XGIS, Instruction Booklet

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Instruction Booklet IB022018EN
Effective July 2020
Instructions for the installation and
commissioning of Power Xpert
TM
XGIS gas insulated switchgear
EATON
www.eaton.com
5.14 Voltage transformer installation and removal
m WARNING
DO NOT ATTEMPT ANY WORK ON THIS EQUIPMENT SUCH AS INSTALLING
COMPONENTS, PERFORMING ANY EXAMINATIONS, PERFORMING ANY
ADJUSTMENTS, PERFORMING ANY SERVICING, OR PERFORMING ANY
MAINTENANCE WHILE IT IS ENERGIZED. BEFORE PERFORMING ANY
WORK, FOLLOW ALL APPROPRIATE HAZARD ASSESSMENT AND ENERGY
CONTROL PRECAUTIONS AND PROCEDURES.
VERIFY NO VOLTAGES ARE PRESENT ON ALL INCOMING AND OUTGOING
CONDUCTORS, AND ANY ENERGY SOURCES CONTAINED WITHIN THE
EQUIPMENT PRIOR TO SERVICING, THEN GROUND (CONNECT TO EARTH)
ALL INCOMING AND OUTGOING CONDUCTORS ATTACHED TO THIS
EQUIPMENT AND TO ANY INTERNAL ENERGY SOURCES.
Voltage transformers can be furnished on XGIS switchgear. If they
are supplied, they are field mounted after the switchgear has been
installed.
5.14.1 VT lifting truck
XGIS voltage transformers are heavy ( ~ 165 lb). An optional lifting
truck (Catalog Number 87A1090G01) can be used to move and
position the top mounted fused VTs for installation. This truck can
be configured in two ways, convertible in the field from one to the
other. The Lifting truck configurations are the High Lift Truck and the
Low Lift Truck.
If a VT Lift Truck is employed, rail kits are available to provide the
required truck rail parts and mounting hardware. The kits vary
depending upon the task to be performed. They are:
•
87C2288
– Rail Kit for Front/Back Lifting
•
87C2289 – Rail Kit for Side Lifting (basic)
•
87C2290 – Side Lifting expansion Kit (additional rail sections
and hardware for long lineups
See the project drawings for the details of converting the Lift Truck
from High Lift to Low Lift configuration.
5.14.1.1 VT High Lift Truck
The default configuration, the “High Lift” truck, used on installations
where the control room ceiling is high enough above the gear to
accommodate the truck height above the vertical section top (see
Figure 108
and
Figure 109)
.
Figure 108. Top fused VT high lift truck.
The High Lift Truck can be configured to lift top VTs from in front of
the vertical section to above the top of the section. The truck is then
trolleyed back to the rear of the section over the VT compartment,
and lowered into place in the VT compartment using the truck winch.
To do this, a temporary braced rail jig is installed at the target
vertical section, which provides truck travel rails aligned with the
VT compartment left and right wall top angles, for front to back
movement. The VT Lift Truck is mounted on these rails.
The VT Lifting Truck hoist is used to raise a VT in its bracket from
floor level to transfer height. The Truck and VT assembly is moved
laterally to its target vertical section for installation. Then the VT
assembly is lowered into place at its connection point. See Figure
109.
Figure 109. Top fused VT high lift truck on rails.