Door interlocks HST
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Contacts that protect life. Trapped-key interlocking systems Door interlocks HST®

Safety for Man, Machine and Process Since 1987, our family business has developed to become a worldwide active specialist in industrial safety. With own subsidiaries and sales partners in all important industrial nations of the world, we are at the disposal of our customers for all questions of safety at work. The requirements of the market make it necessary to constantly review our products and redesign them on the highest-possible level within the framework of the applicable standards and directives. Our organisation is certified to ISO 9001:2008. In addition, in May 2011 we have...

Inspecting, measuring, testing, using... merciless! © by Haake Technik GmbH 2015 | 3

Hazardous machines and systems are frequently equipped with safety elements (guard doors) with a locking mechanism to protect the operator. Their function is to prevent hazardous machine functions if the guard door is not closed and locked and to keep the guard door closed and locked until the risk of injury has passed. Key-operated mechanical interlocks, also called trapped-key systems assume these functions. They are based on the easy-to-under-stand premise that a key cannot be in two places at the same time - it can for instance be inserted in a switch or be used for opening a door...

Vorsicht! Hochspannung! Betreten Lyerboten! The system consists of a central electrical part (for instance in the control panel) and mechanical units at the guard doors: • high degree of safety, individual codes • only pre-determined secure safety sequences are possible • no spare actuator 'in the pocket' • no cables to individual guard doors (cost savings, fault prevention) • easy retro-fitting • door interlocks have a locking feature • particularly suited when there are different energy types on the machine (electric, pneumatic...) • in areas where people can be trapped: personal safety...

Interlocking without cabling Switching element HST-S i i Suard locking mechanism HST-TS2 B I I I I T First safety related function: The actuator of the guard locking device can only be removed when the contacts of the switch element are open (OFF position). Second safety related function: The contacts of the switching element can only be closed again (ON position), when the actuator of the guard locking is trapped. 6 | © by Haake Technik GmbH 2015

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Interlocking without cabling Interlocking device HST-B Trapped-key interlocking systems HST-W5 Guard locking mechanism HST-TZ1 System name: S-A2 First safety related function: The actuator of the guard locking device can be removed only when the bolt of the mechanical switch interlock is extended. Second safety related function: The bolt of the mechanical switch lock can be retracted only when the actuator of the guard locking device is trapped. 8 | © by Haake Technik GmbH 2015

Object protection with non-accessible area Today, we have to service this machine. But we have to open four Today, we have to service this machine. But we have to open four doors, before we can do anything. doors, before we can do anything. Today, we have to service this machine. But we have to open four doors, before we can do anything. Today, we have to service this machine. But we have to open four Today, we have to service this machine. But we have to open four doors, before we can do anything. doors, we have to service this machine. But we have to open four Today, before we can do...

Interlocking without cabling Switching element with locking mechanism HST-M A Trapped-key interlocking systems HST-W5 Guard locking mechanisms HST-TS1 System name: S-C2 First safety related function: The actuator of the guard locking mechanisms can be removed only when the magnet of the locking device is energized and the contacts of the switch element are open. (OFF position). Second safety related function: The contacts of the switching element can only be closed again (ON position), when the actuators of the guard locking mechanisms are trapped. 10 | © by Haake Technik GmbH 2015

Object protection with non-accessible area Oh dear, that does not sound good ... the machine must be repaired. ...when the machine is switched off. To get access to the defective area of the machine, key "A" must be taken out to release the correct key "B". The key is released only... Oh dear, that does not sound good ... the machine must be repaired. To get access to the defective area of the machine, key "A" must be taken out to release the correct key "B". The key is released only... Oh dear, that does not sound good ... the machine must be repaired. To get access to the defective area...

The main system components at a glance Interlocking device HST® LS is used as an attachment to existing switchgear or control units. The standard version is equipped with a 9.5 mm square bolt for actuating levers or special switching device adapters. By turning the key, the switching device is turned off; the key is released and can be removed. Interlocking device HST® B is used for locking switching devices (circuit breakers, disconnectors, earthing switches etc.). By turning the key, the bolt moves into a corresponding recess on the handle or the control unit of the switching device and...

The main system components at a glance Guard locking mechanism HST® TS 1 K consists of a lock and a locking bolt part and can be used on swing and sliding doors or flaps. Versions with different locking bolt positions are available. Insert the key to open the guard door or flap. The locking bolt can then be rotated by 90 ° and removed. The key is trapped. Guard locking mechanism HST® TS 1 consists of a lock and a locking bolt part and can be used on swing and sliding doors or flaps. Versions with different locking bolt positions are available. Insert the key to open the guard door or flap....