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July 4, 2012

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Interlocks – Castell multivoltage interlock

Castell Safety International Ltd has launched a multivoltage interlock primarily for use with uninterruptible power-supply (UPS) systems.

The KSUPS+ is a solenoid-controlled trapped key interlock that, according to the company, only
permits access to a UPS system once it has been put into a safe condition.

Featuring a number of design improvements, the input voltage for the KSUPS+ ranges from 24V ac/dc to 220V ac/dc. Having a wide voltage input range means that a single device now replaces eight previous devices, says Castell, which adds that the monitored solenoid increases the safety performance rating of the KSUPS+, ensuring a higher level of protection for personnel working on UPS systems.

Castell has also reviewed the aesthetics of the KSUPS+. Not only does this improve the look of switchgear cabinets but it also aids operational efficiency and gives a clear indication of where the safety component is located on a panel, says the firm. Importantly, the interlock retains the same mounting dimensions as the previous unit, which means the KSUPS+ can be retrofitted.

Inserting and turning the key operates four pole-switch contacts and allows the system to run. The key remains trapped and can only be released when a signal is received by the device and the solenoid is energised, explains the company. Removing the key switches the contacts to the ‘off’ state, and the key can then be used to open the access interlock.

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