Switch Information

34 kV 600 A Single Pole Switch

SWITCH
CONFIG.
BIL KV
(T:T-T:G)
VOLTAGE
RATING kV
CURRENT
RATING A
OPERATING
MECHANISM
TYPE
CONTROL
VOLTAGE
OUTLINE
DRAWING
 VES
SWITCH
PART NO.
1 POLE 200-200 34 600 SOLENOID 120 VAC 1001565 1000776G1

 

This switch is used for both capacitor and arc furnace switching.  It is solenoid operated because it is used in three phase sets requiring simultaneous contact closure.  It can close at zero voltage for capacitor switching or at peak voltage for arc furnace switching.  Its solenoid operating current is 60 to 65 amperes peak for 1-1/2 cycles.  An inadequate current supply is a common cause of improper operation.  This switch has one form A (e.g. normal open) and one form B (e.g. normal closed) auxiliary contact. The controls for capacitor switching are shown here.  Repair parts are shown beginning here.

Multiple switches are used in parallel for arc furnaces with up to 4000 amperes primary current.  The switch current rating is derated to 500 A when used in parallel. Arc furnace controls that can operate from one to six switches per phase are shown here.  An arc furnace transformer control can optionally be operated using either resistor insertion or peak voltage closing to reduce in-rush currents.

Accessories available for this switch include both current limiting reactors and also resistor modules.  The 30 micro henry reactor replaces the buss bar between the two modules.   The reactor is used to limit in-rush currents when two capacitor banks are installed in parallel on a single buss.  This switch also can be adapted as a resistor insertion switch by installing two 80 ohm resistor modules, one each, on top of the two vacuum interrupter modules.  The two resistor modules are then series connected with the buss bar and have a total series resistance of 180 ohms.  The controls required are shown starting here.  The reactors and resistors are shown here.

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