Commissioning and operation
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| BA 14.0197 | 11/2010
36
6.2
Function checks before commissioning
6.2.1
Operational check
Brake with microswitch
Danger!
The brake must be free of residual torque. The motor must not rotate.
Danger!
Live connections must not be touched.
1. The switching contact for the brake must be open.
2. Remove two bridges from the motor terminals to deenergise the motor.
– Do not switch off the DC brake supply.
Stop!
If the brake is connected to the neutral point of the motor, the PE conductor
must also be connected to this point.
3. Apply DC voltage to the brake.
4. Measure the AC voltage at the motor terminals. It must be zero.
5. Close the switching contact for the brake.
– The brake is released.
6. Measure the DC voltage at the brake:
– The DC voltage measured after the overexcitation time (see bridge/half−wave
rectifier,
32) must correspond to the holding voltage (see Tab. 4). A ±10 %
deviation is permissible.
7. Check air gap "sLü".
– It must be zero and the rotor must rotate freely.
8. Check the switch position of the microswitch (see Tab. 5).
9. Open the switching contact for the brake.
– The brake is applied.
10. Check the switch position of the microswitch (see Tab. 5).
11. Switch off DC voltage for the brake.
12. Bolt bridges to the motor terminals.
13. If necessary, remove additional PEN conductor (step 2).
