Vacuum-circuit :
  ZW7-40.5 series of outdoor high valtage



General Description :

ZW7-40.5 series of vacuum circuit breakers are three-phase, A.C 50Hz outdoor high voltage distribution equipment with 40.5Kv rated voltage, which can be used to open or close loading current, over-loading current and short-circult current. ZW7-40.5 series of vacuum circuit breakers possess reasonable designing construction, convenient maintenance, With current transformer (current ration : 100:5 H 200:5 H 400:5 H 1000:5 H 1600:5), and it is equipped with four coils for each phase used for measurement and protection. The operating mechanism us CD10-III type electric magnetic operating mechanism.

Applying ambient conditions :

1. The height above the sea level should be no higher than 1000m.

2. Ambient temperature : The max. temperature should be +40. The min. temperature should be -30

3. The wind pressure should be no more than 700Pa (equals to wind speed of 34m/s)

4. Earthquake intensity should be no more than 8 degree.

5. The degree of air-filth should be III class.


Main Technical Specification :
Name Unit Data
Rated Voltage kV 40.5
Rated current A 1250 1600 200
Rated frequency Hz 50
Rated power frequency withstand voltage (1min) kV 95
Rated short time withstand current kA <20
Rated withstand current (peak) kA <50
Rated short-circuit breaking current kA 25  31.5
Rated  short-circuit making current kA 63  80
Rated lighting impulse withstand voltage kA 185
Rated duration of short circuit S 4
Operating cycles at rated short-circuit breaking current Cycles 12(8)
Mechanism endurance Cycles 6000  10000
Closing time ms <150
Opening time ms <60
Overall dimension (Width X Depth X Height) mm 2335X500X2275
Rated operating voltage and rated voltage of auxiliary circuit V A.C(D.C)220V 110V


The Constructions Characteristics :
Zw7-40.5 series of vacuum circuit breakers are mainly made up of vacuum interrupters, current transformer, actuator and electric magnetic operating mechanism. The overall construction is adopted insulating bottle supporting type. The vacuum interrupter is mounted in the upper insulating bottle, and between them, a new kind of insulating material is filled, which can solve the problem of condensed water and other problems caused by filled gas or filled oil due to good insulating property, durability and resistance for outdoor high temperature. The lower insulator bottle is used to support the vacuum interrupter. Three-phase insulating bottle are mounted in the waterproof mechanism box, in which a heater is equipped for protecting the electric control component against damp.


1. Upper outgoing terminal    2. Insulating bottle for Vacuum interrupter
3. Lower outgoing terminal   4. Interrupter Support  5. CD10 type mechanism
6. Support insulating bottle    7. bolts of flying rings    8. Door handle   9. strut



1. Upper outgoing terminal    2. Insulating bottle for Vacuum interrupter
3. Lower outgoing terminal   4. Interrupter Support  5. CD10 type mechanism
6. Support insulating bottle    7. bolts of flying rings    8. Door handle   9. strut

    

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Bucheon-city, Gyeonggi-do 420-020, KOREA