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Electrical Service Life; Mechanical Service Life; Wipe Measurement; Service Life Of Capacitor - Toshiba HCV-1JBU Vacuum Contactor, 1.5kV - 600A HCV-1KAU Vacuum Contactor, 1.5kV - 720A Instruction Manual

Vacuum contactor, 1.5kv - 600a & 720a
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MAINTENANCE

ELECTRICAL SERVICE LIFE

The electrical service life of the vacuum
interrupter is defined by the electrode wear and
the
number
of
(mechanical life).
To determine electrode wear, measure the
distance between the lever and washer in the
closed (ON) state, as shown in Figure 13. This
dimension is called the "wipe". If the 1.0mm
contact wear gauge cannot be inserted, then
the end of the service life has been reached.
The maximum number of open/close operations
is 500,000 regardless of the magnitudes of the
currents interrupted.
information
regarding
vacuum interrupters.
The drive unit and the closing coils also have
an electrical service life of 500,000 operations.
As a result, these parts should be replaced
around 500,000 operations.

MECHANICAL SERVICE LIFE

The normally energized type has a mechanical
service life of 2.5 million operations.
mechanical
service
interrupters is 500,000 operations.
For
the
components
replacement or detailed inspection and cleaning
are recommended after the indicated number of
operations.
Isolation
Flange
A
Figure 13 - Wipe Measurement
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
open/close
operations
Contact Toshiba for
replacement
of
the
The
life
of
the
vacuum
listed
in
Table
Table 4 - Recommended Part Replacement
Intervals
Part Name
Vacuum Interrupter
Auxiliary Switch
Moveable Core
Stationary Core
Closing Coil
Flexible Conductor
SERVICE LIFE – CAPACITOR SWITCHING
Switching of the capacitor loads produces
severe conditions for contactors, such as high
frequency inrush current and phase-to-phase
recovery voltage more than twice the normal
voltage.
The criterion for the maximum number of the
capacitor current switching operations is shown
4,
in Figure 14. The vacuum interrupter should be
replaced
when
operations in the graph is reached.
10
8
6
4
2
1
20
10
Figure 14 - Capacitor Switching Life
Page 23
Number of Operations
for Replacement
500,000
200,000
Detailed inspection and
cleaning every 500,000
operations.
Detailed inspection and
cleaning every 500,000
operations.
500,000
500,000
the
number
of
switching
40
60
200
400 600
100
Switching Current (A)
1000

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