The TemRack iR, distributed by NHP, is a fully integrated automated motorised racking device, which enables remote racking of the Terasaki TemPower 2 AR Air Circuit Breaker (ACB) body in and out of its associated carriage.

The automated racking function permits safe isolation of the ACB with zero physical interaction between personnel and the ACB, thereby reducing the risk of exposure to explosive arc fault events and high incident energy.

According to the hierarchy of control, isolation involves personnel being separated from the energised electrical equipment and conductors. It is most effective for personnel who do not have to operate or perform work on the electrical equipment.

The most likely time for an incident to occur in a switchroom is during electrical and mechanical operations, such as switching, isolation and racking of circuit breakers.

The time spent in a potentially dangerous area can be minimised by utilising common accessories for switchgear that facilitate remote operation, such as motor operators and open/close coils. There are also methods available to complete the racking of circuit breakers remotely. These allow the operator to be away from the switchroom when switching and racking operations are occurring.

The automated racking function of the TemRack iR permits safe isolation of the ACB with zero physical interaction between personnel and the ACB, thereby reducing the risk of exposure to explosive arc fault events and high incident energy.

The mechanical interlocks and safety functions of the TemRack iR integrate seamlessly with the ACB and the ACB’s functionality remains unaffected. Similarly, the customer’s electrical protection methodology/system onsite remains unaffected.

Featuring integrated digital I/O for control and feedback, the TemRack iR allows the operator to remotely rack the ACBs in or out while the operator is located outside the switch room. Remote control can be performed via a local control station or other remote methods utilising the integrated I/O on the customer’s automation system. Where ACBs are fitted with open/closed coils, the remote operation of the ACB can also be performed as a further risk mitigation strategy.

The TemRack iR device can be fitted as part of a new ACB build or retrofitted to an existing Terasaki AR2 ACB by NHP’s Service and Solutions Team.