6.3
Tests
Tests on elevator systems can be performed by the assembly company or a certi
fi
cation authority or
organisation. This involves discovering of failure-critical and hazardous conditions. The relevant
operator is responsible for safety. The descriptions below are intended as recommendations for the
technical procedure and do not deal in suf
fi
cient depth with safety engineering aspects of the relevant
system. Therefore, priority is given to the safety engineering speci
fi
cations of the assembly company
or operator. Only trained specialist personnel may carry out tests.
6.3.1
Half load test with current measurement
The test for the 50 % weight compensation should preferably be carried out as follows:
"
The motor current is to be measured in both travel directions with a half load.
"
The measured currents should correspond as closely as possible.
"
The difference between the measured currents should not show a variation of more than 10 %.
Half load test with release of the brake only
"
The shorting circuit, if installed, should be disabled for the duration of the half load test.
"
With a half load and the brake released, the car may not move.
"
After the half load test, the shorting circuit is to be reactivated.
6.3.2
Testing the brake in accordance with EN 81-20:2014
"
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.
"
When driving upwards with a load of 125%, approx. 2.5 x more losses occur in the drive than for a
100 % load, which leads to a correspondingly rapid heating of the motor. As no shut-off takes place
at overtemperature during travel, a journey may only be of short duration.
"
ZAtop SM132/ZAtopx BD132: maximum 10 seconds
"
ZAtop SM180/ZAdisc SL506/ZAdisc SL510: maximum 15 seconds
"
ZAtop SM190/SM200/SM210/SM225/SM250: maximum 20 seconds
"
ZAsyn2 500AL/ZAsyn 700AL/ZAsyn 860AL: maximum 20 seconds
"
Longer travel at 125 % nominal load due to a low inspection speed and/or a high travel distance is
not permitted.
"
To avoid this problem, we recommend transporting the test load upwards in 2 parts and with a
125 % load only downwards.
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 failure of a brake circuit, it must be possible to keep the brake circuits open mechan-
ically independently of one another even when opening the safety circuit.
"
This condition may not be permanent and must therefore be created using buttons or similar.
"
At the same time, the safety circuit should be opened when using this function.
"
For this test, the elevator must be observed.
"
If no discernible delay occurs, the brake circuit held open is to be closed immediately.
"
The system should be stopped and the brake tested.
As an example, refer to the principle circuit diagram in the
“
Electrical installation / Brake / Brake
control
”
chapter. The logic of the principle circuit diagram should be understood. Transferability to the
relevant application must be veri
fi
ed and ZIEHL-ABEGG SE provides no guarantee of suitability.
If the circuit is designed in accordance with the principle circuit diagram:
"
At the nominal speed, press one of the buttons and hold it down until the elevator has stopped.
"
Repeat the test with the other button to test the second brake circuit.
3. Testing the microswitches / inductive proximity switches
"
The release monitoring for the brakes must be evaluated.
"
Before every trip, the change in the state of both brake circuits must be monitored separately.
"
Switching must thus be tested individually, according to the function as an NC and/or NO contact.
"
If there is a missing or incorrect signal, the elevator cabin may not leave the stopping point.
Original operating instructions
ZAtop
–
model series SM250.60B
Start-up
A-TBA20_02-GB 2032 Index 003
Part.-No. 01013399-GB (EU-BD 783)
26/72
