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POL-ACR Series Automatic Circuit Reclosers

Auto recloser (ACR) is recognized by electric utilities throughout the world as an essential device for achieving their prime goal: providing maximum continuity of electric service to their customers simply and economically. Reclosers sense and interrupt fault currents and automatically restore service after momentary outage.

 

Auto Recloser is an automatic medium voltage electric switch which is designed for use on overhead electricity distribution networks to detect and interrupt momentary faults. It shuts off electric power when trouble occurs, such as a short circuit. Where a household circuit breaker remains shut off until it is manually reset, a recloser automatically tests the electrical line to determine whether the trouble has been removed. And, if the problem was only temporary, the recloser automatically resets itself and restores the electric power.

 

On high-voltage electric lines, 80 to 90 percent of trouble occurrences are temporary –such as lightning, windblown tree branches or wires, birds, or rodents–and will, by their very nature, remove themselves from the electric line if the power is shut off before permanent damage occurs to the lines.

The recloser senses when trouble occurs and automatically shuts off the power. An instant later (the length of time may be noticeable only as a lightbulb flicker), the recloser turns the power back on, but if the trouble is still present, it shuts it off again. If the trouble is still present after three such tries, the recloser is programmed to consider the problem permanent and it remains off.

 

Description

POL-ACR12

POL-ACR24

POL-ACR40

Rated maximum voltage

12 kV

24 kV

40 kV

Rated basic impulse level, P>P

85 kV

145 kV

185 kV

Rated basic impulse level, P>E

75 kV

125 kV

170 kV

Power frequency withstand, Dry

50 kV

60 kV

70 kV

Power frequency withstand, Wet

45 kV

50 kV

60 kV

Rated continuous current

630 A / 1250 A

630 A / 1250 A

1200 A

Rated fault making current

50 kA

50 kA / 63 kA

42 kA

Rated fault breaking current

20 kA

20 kA

16 kA

Cable charging current

20 A / 40 A

20 A / 40 A

40 A

Line charging current

5 A / 10 A

5 A / 10 A

5A

Rated fault duration time

3 s

3 s

3 s

Contact resistance, VCB

< 35 µΩ

< 35 µΩ

< 35 µΩ

Contact resistance,ABI

< 60 µΩ

< 65 µΩ

 

Network frequency

50/60 Hz

50/60 Hz

50/60 Hz

Rated operation voltage

220 VAC

24/48 VDC

24 VDC

Rated power

40 W

40 W

40 W

Design specification

IEC 62271-111

IEC 62271-111

IEC 62271-111

Marking specification

IEEE std C37.60

IEEE std C37.60

IEEE std C37.60

Operation sequence, no charge

25 ms trip - 50 ms close - 25 ms trip

25 ms trip - 50 ms close - 25 ms trip

25 ms trip - 50 ms close - 25 ms trip

 

 

 

 

 

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