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How trapped key interlocking protects workers at HV substations
29 May 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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Castell Safety - Trapped Key Safety Interlocks, Lockout Tagout Equipment and Drive-away Prevention
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Castell Safety - Trapped Key Safety Interlocks, Lockout Tagout Equipment and Drive-away PreventionCastellProducts

Products - Key Exchange Units - Y [Key Exchange]
Y The Y type key exchange unit is designed to form part of an integrated safety system linking machine control and access interlocks. The key exchange is configured to trap and release keys in a pre-determined sequence, depending on the operating requirements of the safety interlocking system.

The box can be supplied in numerous key configurations, with one key to release any number of keys. It is always supplied in two rows (see the photograph below).

In all cases, the use of a key exchange box forms part of the integrated solution to machinery safety - Access to the machine.

Depending on the number of access points requiring control, this box would work in conjunction with Access interlocks and key switches (Powersafe).
Y
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