6.3
Drive approval test
6.3.1
Half load test
Due to the short-circuit of the motor while the frequency inverter is inactive, the motor will create a
speed depending braking torque. This braking torque will be produced already at a very low speed.
If the car with half load does not move when the brakes are opened, the short-circuit wiring should be
deactivated. After that the test should be repeated.
After testing the short-circuit wiring must be activated again.
Half load test (alternative):
If deactivating of the short-circuit wiring is not possible or not desired, the testing of 50 % balance can
be made as follows:
With half load the motorcurrent has to be measured in up and down direction. Mostly this is possible at
the frequency inverter (please see operating instructions of your frequency inverter). The measured
currents should not divert by more than 10 %.
6.3.2
Testing the brake according EN 81-1
"
When testing the brakes, the short-circuit wiring has to be deactivated to only test the effect of
the brake.
"
It is recommended to perform the tests when the car position is about in the middle of the shaft.
1. Overload
The test shall be carried out whilst the car is descending at rated speed with 125 % of the rated load
and interrupting the supply to the motor and the brake.
2. Failure of one brake circuit:
The test shall be carried out whilst the car is descending at rated speed with rated load.
To simulate the failure of one brake circuit, the single brake circuits have to be released independent
from the safety circuit. This state must not be permanently, it has to be done by a key button or
equivalent. While using this function the safety circuit should always be opened.
While performing this test the elevator has to be observed. If there should be no visible deceleration,
the open brake circuit has to be closed immediately! The elevator has to be put out of service and the
brake to be checked!
As an example take a look at simpli
fi
ed diagram. The diagram is to be understood analogously. Their
adaptation to other applications must be investigated. ZIEHL-ABEGG SE does not guarantee their
suitability in such circumstances.
If the circuitry is made corresponding simpli
fi
ed diagram:
Press one of the key buttons at nominal speed until the elevator stops. Repeat the test by pressing
the other key button to test the second brake circuit.
3. Testing the micro switches
The micro switches have to be single tested. According to their use as a normely open or normaly
closed contact one micro switch contact at a time has to be opened or close.
If there is a wrong or missing micro switch signal, a travel must not be started.
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model series SM225.40B
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A-TBA13_06-GB
Part.-No. 01009090-GB (
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