Vacuum Interrupter - Toshiba HCV-5HA Instruction Manual

Page 18
Make Sure Power Is Turned Off.
MAINTENANCE
Location
Vacuum Check the upper and lower flanges and interrupter shaft to see if they are
Interrupter contaminated or corroded.
If contaminated...use a clean cloth
and rubbing alcohol.
If corroded.........replace with a
new interrupter.
NOTE: Avoid touching the ceramic surface.
Check the main contact wear in the

vacuum interrupter.

If the wear gauge can be inserted,
then there is sufficient contact material
available for continued use.
If the gauge cannot be inserted, replace
the interrupter.
NOTE: This check is made with the
contactor closed.
Check vacuum in the vacuum interrupter.
Apply 10kVAC between the upper and lower terminals for one minute.
If there is no voltage breakdown, the vacuum interrupter is acceptable for continued use.
If there is voltage breakdown, replace with a new vacuum interrupter before continued
use.
NOTE: If there is a vacuum failure, it can be confirmed by pushing down on the insulating
flange below the vacuum interrupter. If the interrupter shaft can easily be moved, then the
interrupter has lost vacuum.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
Maintenance Procedure
Skin oils may harm the silicon
varnish.
MAINTENANCE
UPPER
FLANGE
LOWER
FLANGE
WEAR
GAUGE
2.7mm
MINIMUM
INSULATING
FLANGE
Fig. 8 Vacuum Interrupter
SHAFT