S&C Instruction Sheet 682-510 29
Maintenance
★ These recommendations may differ from company operating procedures and rules� Where a discrepancy exists, users should follow their company’s
operating procedures and rules�
Components
No maintenance is required for remote supervisory Vista
Under ground Distribution Switchgear. However, occa-
sional inspection of the switchgear and exercising of
the load-interrupter switches and fault interrupters are
recommended. Two battery chargers are available for Vista
Underground Distribution Switchgear. For information on
battery charger TA-3409 and instructions for replacing the
battery, see S&C Instruction Sheet 680-540. For informa-
tion on battery charger TA-2646, identiable by number
G-4875 on the front panel, see S&C Data Bulletin 682-97.
When access to the bushings or high-voltage
components is required for inspection, service, or
repairs, always observe the pre cautions below� Failure
to observe these precautions will result in serious
personal injury or death�
1�
Access to switchgear must be restricted only to
qualified per sons� See the “Qualified Persons”
section on page 2�
2�
Always follow safe operating procedures and rules�
3�
Before touching any bushings or components,
always discon nect load-interrupter switches and
fault interrupters from all power sources (including
backfeed) and test for voltage�
4�
After the switchgear has been completely
disconnected from all sources of power and tested
for voltage, ground all load-inter rupter switches and
fault interrupters�
5�
Always assume the bushings are energized unless
proved otherwise by test, by visual evidence of an
Open-Circuit condi tion at the load-interrupter switch
or fault interrupter, or by observing that the load-
interrupter switch or fault interrupter is grounded�
6�
Test the bushings for voltage using the Voltage-
Indication fea ture (if furnished) or other proper
high-voltage test equipment�
7�
Make sure the switchgear tank and pad-mounted
enclosure (if furnished) are properly grounded to the
station or facility ground� Do not return equipment
to service unless such grounds are properly made�
DANGER
★
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