| VerSaVac™ |
| Scope: |
This Specification
contains the requirements for the design and manufacture of single-phase
distribution capacitor switches.
|
| Reference
Standards: |
The switch
shall be designed, tested and manufactured in accordance with ANSI C37.66
- 1969 or latest version for distribution capacitor switches, including
other applicable ANSI, NEMA, IEEE standards as defined in the reference
section of the standard. |
| Service
Conditions: |
The
switch shall be suitable for outdoor application. Service conditions for
the capacitor switch shall be usual standards for installation; ambient
temperatures from -40oC to +55oC. Unusual service conditions, such as
temperature extremes, will be specified. |
|
Switch Construction:
|
Current interruption
shall be by vacuum interrupters manufactured in a highly controlled
process using vacuum furnaces.
Solid, non-hydroscopic, high dielectric material shall be used to insulate
around the vacuum interrupter. No oil or SF-6 gas shall be used for
interruption or insulation. No epoxy shall be used for insulation.
The operating mechanism shall utilize solenoids for the opening and
closing functions. The switch operator shall be totally enclosed within
a corrosion resistant housing. A pressure equalizing system to prohibit
ingress of moisture into the switch shall be used.
The interrupter
housing shall be porcelain with one hole terminal pads.
The switch will have no external moving parts.
The switch shall be able to be vertically or horizontally mounted.
Switch position indication shall be located on the underside of the
switch to permit viewing from ground level.
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| Capacitor
Switch Performance Requirements: |
The switch shall
be capable of a minimum mechanical life of 50,000 open and close operations
without requiring any maintenance.
The switch shall provide synchronized operation (4ms) of all three switches
to limit electrical insulation stress on the capacitor bank.
The switch shall be capable of being utilized for zero-voltage closing
applications.
The switch shall have a minimum of 10 years field proven experience.
The switch will
operate at a minimum control voltage of 80 VAC.
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