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Switchgear and protection: trapped key interlocking vs LOTO
23 Apr 2015

There are two potential options when considering a mechanical safety system for switchgear applications. The choice is between a trapped key interlocking system or a padlock-based lock-out / tag-out (LOTO) system. Both systems: Provide a method of isolating switchgear. Allow safe personnel access when maintenance of machinery is required. Are available in full stainless steel […]
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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 - Time Delay and Motion Sensing Units - TDR [Electronic Timer with Electrical Isolation]
TDR The TDR-20 is a heavy duty trapped key interlock switch controlled by a fail-safe timer and solenoid.

The unit is designed to control access to hazardous machines with run down times and can be used in high risk category 4 applications.

The unit incorporates: a dual channel fail-safe timer; heavy duty continously rated solenoid; solenoid position monitoring; 20A electrical switch; front panel lamp indication of solenoid position and timer failure and up to four lock centres for multiple access applications.
TDR
Data Sheet
Technical Sheet
Install Sheet
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