What is trapped key interlock system?
Trapped-key interlocking utilizes locks and keys for sequential control of equipment and machinery to ensure safe operation. Trapped-key interlocks are widely used to ensure safe access to potentially live or dangerous plant or equipment in an industrial setting.
What is Castell key interlock?
Castell trapped key interlocks have been used as part of integrated safety systems across a wide number of industries worldwide for over 95 years. Our products are designed and manufactured to withstand the environmental conditions where people and assets need to be protected.
What is key interlock solenoid?
The shift interlock solenoid is a safety mechanism that keeps the driver from shifting out of park when the brake pedal is not pressed down. In addition to the brake pedal being pressed down, the ignition must be in the on position.
What happens when you remove a key from an interlock?
Turning the key in the breaker interlock then moves the bolt such that the circuit breaker cannot be reclosed and allows the key to be withdrawn from the interlock. The circuit breaker is now safely locked open. Removal of the key ensures that it cannot be unlocked and reclosed by anyone except the person holding that key.
What are the interlocks on a light switch?
The switch has two interlocks – lock 1 which locks the switch in either the open or closed position and lock 2 which is keyed differently and is utilized to lock the switch open (the key in lock 2 is held whenever the switch is closed). Using the first key to unlock lock 1 frees the switch for manual opening and traps that particular key.
What are rotary trapped key interlock switches used for?
Our Rotary Trapped Key Interlock Switches are used for electrical isolation of machinery to improve safe access and also as teach boxes in robot cells. Once the power has been turned off, the key can be withdrawn and used in the next sequence of operation such as unlocking an access hatch or allowing valves to be operated.
How does a slamlock lock work with a trapped key?
Our Slamlock™ Trapped Key Interlock Switches combine the features of trapped keys with tongue actuated interlocks. When the actuator is inserted into the interlock (guard closed), the trapped key can be rotated and removed. With the key free, the actuator cannot be removed. This locks the guard door.
The switch has two interlocks – lock 1 which locks the switch in either the open or closed position and lock 2 which is keyed differently and is utilized to lock the switch open (the key in lock 2 is held whenever the switch is closed). Using the first key to unlock lock 1 frees the switch for manual opening and traps that particular key.
Turning the key in the breaker interlock then moves the bolt such that the circuit breaker cannot be reclosed and allows the key to be withdrawn from the interlock. The circuit breaker is now safely locked open. Removal of the key ensures that it cannot be unlocked and reclosed by anyone except the person holding that key.
Our Slamlock™ Trapped Key Interlock Switches combine the features of trapped keys with tongue actuated interlocks. When the actuator is inserted into the interlock (guard closed), the trapped key can be rotated and removed. With the key free, the actuator cannot be removed. This locks the guard door.
How does an EMD guardmaster interlock switch work?
This interlock switch uses a SI Guardmaster® safety relay in combination with an EMD Guardmaster safety relay to execute the timing sequence. Turning a non-removable key initiates the timer. When the EMD times out, its output energizes an internal solenoid which then allows the removal of either one or two trapped keys.