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Higher kA Terasaki air circuit breakers

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article image Tempower 2 ACB.

NHP has added the new higher kA AR-H range to the recently introduced Terasaki TemPower 2 air circuit breaker range. This new addition provides additional application capability to the AR-S standard range.

The new AR-H type is available in two frame sizes; the AR2, 2000A frame and the AR 3, 3200A frame.

Current sensor ratings are available ranging from 200 to 3200A. Maximum breaking capacity kA ratings at 440V, range from 80kA in the AR2 frame size, to 100kA in the AR3 frame size.

When compared, the "standard" AR-S range is 65kA and 80kA respectively. The standard AR-S 4000A ACB continues with its breaking capacity of 100kA at 415V.

The AR ACB range is also suited to operate at 690V, as 690V installations are becoming more common in Australia and New Zealand. The new AR-H range allows breaking capacities of up to 85kA at 690V to be achieved.

In terms of overcurrent protection relays, both the AR-S and H types use the same OCRs and offer similar features and options. External accessories are also similar for common frame sizes.

Terasaki ACB's are also now available with Modbus and LonWorks communications capabilities. Already, many TemPower 2 ACBs have been sold in Australia and New Zealand fitted with Modbus comms.

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