4
Type VFI, Fluid-insulated Switchgear
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
MN285006EN March 2018
WARNING
Hazardous voltage . Always use a hotstick when working
with this equipment . Failure to do so could result in
contact with high voltage, which will cause death or
severe personal injury .
G108A .0
The Type VFI switchgear is equipped with hotstick-operable
handles that may be located on the tap- and/or source-side
of the unit. The VFI switchgear can be configured for either
single-phase or ganged three-phase operation (all three
phases operated simultaneously with a single handle).
The operating handle(s) (shown in
Figure 3
and
Figure 4
)
provide convenient push-to-close and pull-to-open operation.
The operating handle(s) may be padlocked in the open
position. When configured for single-phase operation, each
phase trips independently; however, the control may be
configured to provide simultaneous tripping of all three
phases.
Weight
The weight of the unit is shown on the nameplate. Make
sure that lifting equipment used is rated sufficiently to safely
handle the switchgear.
Special certifications
Units can be provided with a UL
®
listing and labeling
depending on the features specified. Please ensure
appropriate labeling is provided prior to installation for
instances where a UL
®
listing is required.
Figure 3 . VFI switchgear operating handle, three-phase
ganged operation
Figure 4 . VFI switchgear operating handles, single-
phase operation
Installation procedure
WARNING
This equipment is not intended to protect human
life . Follow all locally approved procedures and safety
practices when installing or operating this equipment .
Failure to comply can result in death, severe personal
injury, and equipment damage .
G102 .1
1.
Check fluid level .
Make sure the fluid in the switchgear
tank is at the proper level by checking the fluid level
indicator on the front plate(s). Some units have fluid
level indicators on both source-side and tap-side front
plates; both indicators should be at the proper level.
WARNING
This equipment relies on dielectric fluid to provide
electrical insulation between components . The dielectric
strength and moisture content of the fluid must be
checked on a regular basis, as part of the routine
maintenance inspection, to ensure that it is at or
above minimum dielectric requirements and below the
maximum moisture content . Use of this equipment
with dielectric fluid that does not meet requirements
can result in internal flashovers that will damage the
equipment and can result in death or serious injury .
G107 .3
2.
Test fluid dielectric strength and moisture content .
If the switchgear has been stored for some time or
is being relocated, perform these tests on the fluid in
accordance with ASTM-approved testing procedures.
