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22 May 2017

Lack of equipment service requirements and avoiding maintenance shutdowns can often lead to a situation where critical switchgear is neglected, resulting in the deterioration and premature failure of switchgear contacts, conductors and connections are corroded. Consequentially, the switchboard and switchgear starts to overheat causing sudden failure in the switchgear creating unexpected power and financial losses for the site.

Most modern air circuit breakers (ACBs) use an electronic trip unit to protect from electrical short circuits, which monitor current and voltage. These trip units are insensitive to the temperature, so in the event of a loose connection or worn contact, which will lead to overheating, the trip unit will not be aware of the situation as this is beyond the ‘normal’ protection functions.

As a solution for this potential problem, the innovative manufacturer Terasaki has stepped ahead of the market and added an extra protective dimension for the AGR31C electronic trip units to guard against overheating of contact, connections and conductors – known as 3C protection.

This 3C overheating alarm is available via a relay output contact or via the integrated MODBUS communications. 3C overheating protection can also be configured to trip the TemPower 2, if the ACB is supplying a ‘non critical’ process.

Stay safe with the Terasaki TemPower 2 ACB with advanced 3C overheating protection from NHP.

TemPower 2 Air Circuit Breaker

TemPower 2 Air Circuit Breaker

Safety, Performance, Protection, Reliability.


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