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How trapped key interlocking protects workers at HV substations
08 Jun 2015

Interlocking switchgear within HV substations ensures that personnel operate equipment safely, according to the correct procedures. Using a well-designed trapped key interlocking scheme will prevent personnel accessing potentially dangerous areas before the switchgear system has been put into a safe condition. A good interlocking scheme will also ensure that the system functions correctly, so that […]
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Catalog - Access Interlocks - GATESAFE [Emergency Exit device]
GATESAFE The Gatesafe is an emergency exit device that can be fitted to left & right hand hinged doors and should be used in conjunction with the Castell access locks, the MAI, Al, MAIE & AIE.

The Gatesafe is complete with an emergency stop button that can be depressed to both isolate the supply voltage and allow emergency exit from the area.

The switch contact arrangement of 2N/C 1N/O make it suitable for category 4 safety applications where cross monitoring is required. These features make it particularly suitable for full body access areas where personnel safety keys are not deployed. The Gatesafe is designed to operate as part of an access control system.

A typical example of machine isolation and controlled access is shown below.
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