Gearless Lift Machine
WSG-S2.4
Operating Instructions
Code
GM.8.003290.EN
Date
13.06.2016
Version
0.10
Page
20
Subject to changes without notice ! Subject to changes without notice !
EN
6.7. Testing the brake system to EN 81
Overload
• The brake system should be tested by interrupting the power supply to the motor and brake system with the
car moving downward at rated speed and
1.25 times
the rated load. The brake system must be capable of
decelerating the car.
Failure of a brake
• If one brake fails, the brake system must still be capable of decelerating the car sufficiently during its down -
ward travel at rated load and rated speed.
• When simulating the failure of one brake, the other brakes must be kept open separately, even if the safety
circuit is open. This should be done using suitable electric circuitry or by hand.
• This state must not be maintained in the long term!
• Observe the lift during this test. If it does not decelerate, close the open brake circuit immediately.
Separate operation of the individual brakes
• The only method by which the partial brakes can be released separately is through electrical control. The
brakes can be activated/deactivated quickly using individual control buttons.
Monitoring the brakes
• Check the brake monitoring switches individually. No car travel must be permitted if a microswitch signal is
missing or a wrong signal operates.
The brake system should be tested with the car about halfway down the shaft. If any motor short-circuit
connections have been made, these should be deactivated so that the brake effect can be tested
independently.
