3 Phase Outdoor Pole Mounted Automatic Circuit Recloser ACR Vacuum Circuit Breaker 30KV 33KV 35KV 36KV 38KV 40.5KV

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Our 30- 40.5 KV automatic reclosers have rating as defined in ANSI/IEEE Standard C37.60 (I) as summarised below:

Service Conditions:

a. Temperature-up to 45°C.

b. Altitude-up to 1,000 meters.

Rated Voltage 

a. Nominal system voltage-33,000volt

b. Rated maximum voltage -40500 volts.

c. Power frequency withstand voltage-70 KV

Rated frequency - 50 Hertz 

a tolerance of ± 5 percent. Rated symmetrical making current is the same value as the

rated symmetrical interrupting current, with asymmetrical

relationships as defined in ANSI/IEEE C37.60.

Rated minimum Impulse Withstand Voltage - 170 KV. 



Boerstn 33KV three phase class III recloser is in accordance with the standard ANSI/IEEE C37.60.

The recloser is designed to provide self-contained 33KV circuit protection with series trip,solenoid operation and electronic control single break contact structure and fault interruption under vacuum. The vacuum interrupters are in accordance with ANSI/IEEE C37.85.  The recloser is accordance with ANSI/IEEE C37.85. The recloser is  designed to sense line-to-ground, line-to-line or three-phase fault currents and interrupt all three phases of the distribution circuit simultaneously. The recloser is equipped with a electronic type ground feature. For fault target, Automatic Circuit recloser will be provided with an indicator for detection of fault current on individual phase or ground. If the Electronic Control cubicle of Reclosers or Recloser itself require an auxiliary transformer, the manufacturer must provide the same at his cost. The recloser is provided with in-built auxiliary transformer of required rating to provide power supply to the control panel.

Rated voltage, kV

30 -40.5

Max. working voltage, kV


Rated current, not less than, A

630A / 1250A /1600A

Rated breaking current, not less than, kA


Electrical dynamic withstand current, kA


Operation times


Heating withstand current (during 3 seconds/this parameter must not be as 1 sec) , not less than, kA


Open, close reserve, not less than  

- By rated current, Close-Open action 

- By breaking current, Close-Open action




Breaking own period, not more than, ms


Full breaking period, not more than, ms


Close own period, not more than, ms


Testing voltage of lightning impulse, kV


1 min testing voltage by voltage with production frequency, kV


Cycle of recloser


Max amount of close and open cycle within 1 hour, not less than


Ambient environmental condition performance

Dedicated to work for outdoor and cold weather

Upper limit of ambient relative moisture when air temperature is at 25°C



Ambient environmental min temperature,°C (It must be approved by test)


Ambient environmental max temperature,°C (It must be approved by test)


Environmental condition, not less than

Above 1500 m from sea altitude

Protection degree of drive external main body


Penetration length of external insulating, mm, not less than


Permissible environmental wind amount when no icing-not more than

40 m/s

Permissible environmental wind amount of wire iced period (Icing wall thickness is till 20 mm), not more than

15 m/s

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