Safety Interlock

1. Haake Technik GmbH Master Esch 72 48691 Vreden Germany Tel.: +49 2564 3965 0 Fax +49 2564 3965 90 www.haake-technik.com info@haake-technik.com © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

2. People, machinery and processes are in safe condition with Haake Technik Application: How to guard a service lift in Wind Turbines. © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

3. As the demand of Wind Turbines get higher an higher worldwide the owner, and manufactureres of them realize that service lifts are a good investment for the user and service personel to act safe and comfortable © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010 Tower Rotor Blade Generator Service Lift Shaft Service Lift Cage Different Levels

4. Without a safety arrangement the following can happen: © Haake Technik GmbH 06/10 The worker goes to the Service Lift Cage © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

5. Without a safety arrangement the following can happen: © Haake Technik GmbH 06/10 He steps in and goes up to one of the higher plattforms © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

6. © Haake Technik GmbH 06/10 Without a safety arrangement the following can happen: He steps in and goes up to one of the higher plattforms © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

7. Without a safety arrangement the following can happen: © Haake Technik GmbH 06/10 Another worker comes an requires the lift. © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

8. Without a safety arrangement the following can happen: © Haake Technik GmbH 06/10 The lift comes down. © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

9. Without a safety arrangement the following can happen: © Haake Technik GmbH 06/10 Attention: Without the Lift Cage the worker could fall into the shaft !!! © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

10. Without a safety arrangement the following can happen: © Haake Technik GmbH 06/10 To avoid this, the worker can be secured by an Interlock System wich makes shure that: - a second person can not require the lift - a defined process has to be followed up - the lift is always at the same plattform as the user © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

11. Parts to use: © Haake Technik GmbH 06/10 Rotary Switch HST-S This unit is mounted inside the cage of the service lift. To use the service lift, the key has to be inserted and rotated. That means only the worker in the Service Lift Cage is able to activate the lift. © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

12. Parts to use: © Haake Technik GmbH 06/10 Key HST-K The key can only be in one lock. Either in the rotary switch or in the door-interlock. The key should be delivered with a chain to fix it stationary inside the Service Lift Cage. © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

13. Parts to use: © Haake Technik GmbH 06/10 Door Interlock HST-TS This interlock is mounted at every level or plattform of the tower. It locks the door or barrier as long as the key is in the rotary switch. © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010

14. How it works: © Haake Technik GmbH 06/10 Either Or Or Plattform 1 Plattform 2 Plattform 3 ... Rotary Switch HST-SU: To switch on or turn off the energy of the service lift. Key can only be removed when energy is switched off. Door Interlock HST-TS: Bolt can only be pulled out, when key is inserted. Thus it can only be opened when energy is switched off. © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010 e.g. Barrier

15. © Haake Technik GmbH 06/10 © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010 How it works: Either Or Or Plattform 1 Plattform 2 Plattform 3 ... Rotary Switch HST-SU: To switch on or turn off the energy of the service lift. Key can only be removed when energy is switched off. Door Interlock HST-TS: Bolt can only be pulled out, when key is inserted. Thus it can only be opened when energy is switched off. e.g. Barrier

16. © Haake Technik GmbH 06/10 The worker goes to the Service Lift Cage © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010 How it works: He takes the key, puts it into the roaty switch and turns around

17. © Haake Technik GmbH 06/10 © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010 How it works: The worker goes to the Service Lift Cage He takes the key, puts it into the roaty switch and turns around

18. © Haake Technik GmbH 06/10 © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010 How it works: The energy cicuit is closed now and the lift can go upwards

19. © Haake Technik GmbH 06/10 © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010 How it works: The key has to be removed from the rotary switch now, to opend the barrier

20. © Haake Technik GmbH 06/10 © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010 How it works: The key has to be removed from the rotary switch now, to opend the barrier

21. © Haake Technik GmbH 06/10 © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010 How it works: The worker puts the key into the door interlock, rotades it, and the barrier can be opened.

22. © Haake Technik GmbH 06/10 © Haake Technik GmbH 06/10 Mr. Karl-Heinz Pohl 06/2010 How it works: The key stays in the interlock. - a second person can not require the lift - a defined process has to be followed up - the lift is always at the same plattform as the user Thus: