ZN85-40.5 Vacuum Breaker

KEY WORDS:High pressure vacuum switch



The ZN85-40.5/T2000-31.5 indoor HV vacuum breaker(short for breaker)is used for switching on/off load current, over load current, fault current in industrial and mining establishments, power plants and transformer substations with three-phase AC 50HZ,rated voltage 40.5KV power system.
The breaker and operating mechanism use up-under arrangement stucture, reducing the depth of the breaker effectively.
With reasonable general planning, goodly and compact outline, small size and flexible operation, the break has features of reliable electric specification, long life, easy to check and non-maintenance of the mechanism.
The breaker is used for operating frequently and in some places with difficult working conditions 
Technical data:

Item Unit Parameter
Rated voltage KV 40.5
Rated frequency HZ 50
Rated current A 1250 1600 2000
Rated short circuit breaking current KA 25 31.5 40
Rated short current switching current(Peak value) KA 63 80 100
Rated peak value withstand current KA 25 31.5 40
Rated peak value withstand current KA 63 80 100
Power frequency wtihstand voltage KV 95
Lightning impulse withstand voltage(Peak value) KV 185
Rated operating sequence   O-0.3s-CO-180s-O
Breaking current frequency under rated short circuit Times 20
Mechanical life 10000
Breaking time ms ≤80
Single capacitor bank breaking current A 630
Back to back capacitor bank breaking current 400
Rated operating voltage V DC/AC:100/200

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