ThyssenKrupp Mini gearless DAF270, Operating Manual

Page: 43 / 76

O
PERATING
M
ANUAL
6. S
ERVICING
ThyssenKrupp Aufzugswerke GmbH
43
Issue 06.2004
6.2 Drive brake test
Inspection interval: inspection of the brake shall be carried before initial
operation, after exchange of brake and once a year in the course of the
general elevator servicing.
a) The brake deceleration is tested for each brake circuit
individually.
Note: before testing:
•
Inspection signs must be made available at the landing doors.
•
Close the doors acc. to the rules.
•
Make sure that the car is empty.
•
While testing the brake circuit with the empty car moving upwards the car
must be at least 2 landings below the upper-most landing.
•
While testing the brake circuit with the fully loaded car moving downward
the car must be at least 2 landings above the lower-most landing.
•
The single circuits are tested by applying below voltage at the single brake
coils:
Brake type SZ1700/
1700 with excitation / withstand voltage 104 / 52 VDC
Brake type SZ1700/ 1200 with operating voltage 207 VDC
While testing the brake circuit, the brake of the 2. brake circuit must be
released during the braking operation (even in case of emergency stop).
Withstand voltage must be applied at the magnet coil of the 2. brake
circuit.
Disable release monitoring of the brakes until the respective brake circuit
is tested.
Attention: should the elevator move after release of one brake circuit or fail
to decelerate sensibly during the braking operation, switch the continuously
energised coil off immediately .
The dual circuit braking function is not guaranteed. Check brake!
Testing with deceleration measure:
Check brake deceleration at each brake circuit individually.
Testing may be performed while moving the empty car upwards or the fully
loaded car downwards.
•
Connect deceleration measure
•
Activate normal run (brake to be tested is released)
•
Activate emergency stop as soon as rated speed is reached (brake to be
tested closes). While testing the brake circuits individually, the motor coils
should be de-energized. Motor braking may lead to wrong test results.
•
Determine deceleration for 1. brake circuit using a measuring device
•
Compare measurement and reference value
•
Remove continuous voltage supply at continuously open 2. brake circuit
and connect to 1. brake circuit.