Switch Information

34 kV, 300 A, 3 Pole Switch

Switches with .160 Inch Gap Comparable to Joslyn™ Switches With Similar Ratings
SWITCH
CONFIG.
BIL  kV
(T:T-T:G)
VOLTAGE
RATING kV
CURRENT
RATING A
OPERATING
MECHANISM
TYPE
CONTROL
VOLTAGE
OUTLINE
DRAWING
VES
SWITCH
ORDERING
NO.
3 POLE 200:200 34 300 15 PIN MOTOR 24 VDC 1003256 1003315G1
3 POLE 200:200 34 300 15 PIN MOTOR 48 VDC/120 VAC 1003256 1002521G1
3 POLE 200:200 34 300 15 PIN MOTOR 125 VDC 1003256 1002521G2
3 POLE 200:200 34 300 15 PIN MOTOR 220 VAC 1003256 1003315G6
3 POLE 200:200 34 300 35 PIN MOTOR 24 VDC 1003256 1003316G1
3 POLE 200:200 34 300 35 PIN MOTOR 48 VDC/120 VAC 1003256 1003252G1
3 POLE 200:200 34 300 35 PIN MOTOR 125 VDC 1003256 1003252G2
3 POLE 200:200 34 300 35 PIN MOTOR 220 VAC 1003256 1003316G2
3 POLE 200:200 34 300 SOLENOID 120 VAC 1003256 1002201G1
Switches with .160 inch Gap with Grading Capacitors and Having No Known Joslyn™ Equivalent
SWITCH
CONFIG.
BIL  kV
(T:T-T:G)
VOLTAGE
RATING kV
CURRENT
RATING A
OPERATING
MECHANISM
TYPE
CONTROL
VOLTAGE
OUTLINE
DRAWING
VES
SWITCH
ORDERING
NO.
3 POLE 200:200 34 300 15 PIN MOTOR 24 VDC 1003256 1003315G5
3 POLE 200:200 34 300 15 PIN MOTOR 48 VDC/120 VAC 1003256 1002521G5
3 POLE 200:200 34 300 15 PIN MOTOR 125 VDC 1003256 1002521G6
3 POLE 200:200 34 300 15 PIN MOTOR 220 VAC 1003256 1003315G
3 POLE 200:200 34 300 35 PIN MOTOR 24 VDC 1003256 1003316G5
3 POLE 200:200 34 300 35 PIN MOTOR 48 VDC/120 VAC 1003256 1003252G5
3 POLE 200:200 34 300 35 PIN MOTOR 125 VDC 1003256 1003252G6
3 POLE 200:200 34 300 35 PIN MOTOR 220 VAC 1003256 1003316G6
3 POLE 200:200 34 300 SOLENOID 120 VAC 1003256 1002201G2
Switches with .320 Inch Gap with Grading Capacitors and Having No Known Joslyn™ Equivalent
SWITCH
CONFIG.
BIL  kV
(T:T-T:G)
VOLTAGE
RATING kV
CURRENT
RATING A
OPERATING
MECHANISM
TYPE
CONTROL
VOLTAGE
OUTLINE
DRAWING
VES
SWITCH
ORDERING
NO.
3 POLE 200:200 34 300 15 PIN MOTOR 24 VDC 1003256 1003315G7
3 POLE 200:200 34 300 15 PIN MOTOR 48 VDC/120 VAC 1003256 1002521G7
3 POLE 200:200 34 300 15 PIN MOTOR 125 VDC 1003256 1002521G8
3 POLE 200:200 34 300 15 PIN MOTOR 220 VAC 1003256 1003315G8
3 POLE 200:200 34 300 35 PIN MOTOR 24 VDC 1003256 1003316G7
3 POLE 200:200 34 300 35 PIN MOTOR 48 VDC/120 VAC 1003256 1003252G7
3 POLE 200:200 34 300 35 PIN MOTOR 125 VDC 1003256 1003252G8
3 POLE 200:200 34 300 35 PIN MOTOR 220 VAC 1003256 1003316G8

 

The Vacuum Electric Switch Co. is offering this switch in three different versions to improve restrike resistance during capacitor switching.  The improvements in restrike resistance are achieved by first adding grading capacitors and second by increasing the open gap between the vacuum contacts from .160 to .320 inches.

The geometric configuration of this switch may result in the parasitic capacitance in parallel with each vacuum interrupter being unequal.   This is most likely to occur when this switch is used on poles where objects in close proximity may cause a larger portion of the recovery voltage to appear across the upper module and reduce the switching capability.  Grading capacitors tend to equalize the capacitance across each vacuum interrupter diminishing this effect.  The recovery voltage withstand capability is further improved by increasing the contact open gap from .160 to .320 inches.  The larger gap requires more energy than is available from a solenoid mechanism so that it is only possible on motor operated switches.

The common uses of this 34 kV switch are either capacitor switching or sectionalizing.  It can have either a solenoid or motor operated mechanism.  The principal differences between switches with the two mechanisms are the complexity of control, control current demand, available operating voltages, and mechanical life.   A motor operated switch requires a simple control system because the control current is less than 6 amperes and is available with a variety of control voltages.  The VES motor operator has a limited life of approximately 30,000 operations as compared to the 200,000 operations for  the solenoid operator.  A solenoid  operated switch requires a peak operating current of 120 to 130 amperes for 1-1/2 cycles which may be difficult to supply.  This problem may be overcome by using a stored energy control such as shown here.

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