Gearless Lift Machine
WSG-18 and WLG-18
Operating Instructions
Seite/page
21
Datum/date
14.02.2006
Stand/version
0.17
Änderungen vorbehalten!
Subject to changes without notice!
MADE BY
SAD GmbH
A MEMBER OF WITTUR
9.7. Testing the brake system to EN 81-1
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 indepen-
dently.
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 deceler-
ating the car.
Failure of a brake
If one brake fails, the brake system must still be capable
of decelerating the car sufficiently during its downward
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 preferably be done using suit-
able electric circuitry, but can also be performed manual-
ly.
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
There are several possible ways of operating the brakes
separately:
•
The preferred method is separate electrical control of
the brakes. The individual brakes can be activated/deac-
tivated quickly by individual control buttons (The con-
nections for the two coils are accessible in the brake
magnet.)
•
Block one brake arm in its open position by using a
suitable excentric lever. This lever makes it possible to
release the blocked brake arm immediately in the case
of an emergency.
Note
Note
Monitoring the brakes
Check the brake monitoring switches individually. No car
travel must be permitted if a micro switch signal is miss-
ing or a wrong signal operates.
