Trapped Key Interlocks
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- Control Switches
- Access Interlocks
- Switchgear Interlocks
- Key Exchange Boxes
- System Key
- Switchgear Interlock
Trapped key interlocking is a very effective means of controlling access to hazardous machinery. The technology forces operating and maintenance personnel to follow a predetermined sequence of events that will ensure the machinery is isolated before access is permitted. Trapped key interlocks are robust, easy to operate and can be fitted to a wide range of applications.
The all stainless steel range of interlocks are robust, durable, easy to install and proven in all types of hostile environments. Our range includes bolt and access interlocks, power control and isolation switches key exchange boxes, timers and motion control sensors.
(HST-S) Control Switches
HST-SHST-S Switches can be used to control access to dangerous machinery. When the key is removed the power to the machine is isolated. The key can then be used to release an access interlock on the door in the guarding surrounding the machine. This ensures that when the door is unlocked the machine is off and is therefore in a safe condition. Solenoid released switches are available which only allow the key to be released when a signal is provided (for example when a machine is stopped and in a safe condition).
(HST-TS) Access Interlocks
HST-TSThe HST-TS access interlock range are manufactured of stainless steel and supplied with protective flip caps as standard ensuring they are suitable for even the harshest environments.
(HST-B) Switchgear Interlocks
HST-BThe HST-B range can be used to lock 'ON' or 'OFF' electrical switchgear circuit breakers, disconnectors and earthing devices by extended the bolt into a corresponding slot in a cam connected to the switchgear operating handle or toggle. Only when the switchgear is in the desired position can you release the key.
(HST-X) Key Exchange Boxes
HST-XCHST-X Exchange boxes are used to increase the number of keys available in an interlocking sequence. For instance if more than one access door needs to be open at any one time.
(HST-K) System Key
HST-KManufactured of stainless steel the keys are coded so that they only fit the lock for which they are intended, thus ensuring a high degree of safety. The user selects an engraving for the key that is of relevance to him or her (maximum 5 digits). This appears on the key, the respective lock and its dust-cap.
(HST-LS) Switchgear Interlock
HST-LSThe common usage for the HST-LS interlock is to either lock 'ON' or 'OFF' electrical switchgear/control units. The standard unit is fitted with a 9.5mm square x 48.5mm long shaft that can utilise actuating levers or specific switchgear adaptors to operate motor or rotary handled isolators.
Please note: This is only a small selection of the ISS Safety range of Trapped Key Interlocks, other variations and specials available upon request. ISS Safety employ technically qualified personnel who cover the UK. All of our safety engineers are qualified to "NEBOSH" National safety standards and are capable of providing advice on the use and application of the most appropriate interlocking system. To discuss a particular safety application or to receive a visit from one of our engineers please call us on +44 (0)20 8732 5505 or send us an e-mail to info@iss-safety.co.uk.