4.2
Dynamic functions test
Nobody should be in the lift car, on the car
roof or in the lift shaft when carrying out
test runs or functions tests!
General notes:
Each gripping test has to be documented and a
copy of the test report should remain in the eleva-
tor book.
After each test or activation of the safety
gear check that there are no defects that
can impair the normal run of the elevator.
Change the safety gear if there is a damage
on it. A visual check is sufficient.
It is recommended to do the test near a
door, to unload the weights and make it
easier to lift up the elevator after testing
the safety gears.
4.2.1
Gripping test for car safety gear
Method A - Gripping test with overload
-
125% of the rated load in the car
-
gripping speed = nominal speed or lower
• Secure the counterweight safety gear (if any)
by tying the safety gear lever up. This prevents
unintended gripping of the counterweight
safety gear due to jumping of the counter-
weight.
• Place test weights (equal to 125% of the
rated load) inside the car. Distribute the
weights evenly.
• Drive the car down with nominal or lower
speed, keep the machine brake manually
open. After reaching the test speed activate
the tripping function of the overspeed gover-
nor at the door zone.
• If the car does not stop after 1-2 seconds close
the brake immediately.
• Try to drive the car down to check that the
safety gear has engaged (suspension ropes
should slide on the traction sheave).
Method B - Gripping test with rated load
-
100% of the rated load in the car
-
gripping speed = tripping speed of the over-
speed governor
Always ensure that the travelling height is
high enough to keep the car from running
onto the buffer.
Three persons are required for the test. The first-
person keeps the machine brake open. The second
person monitors the speed of the elevator with a
manual tachometer. The third person observes the
distance to the pit. His task is to notify when the
machine brake must be closed if the safety gear-
does not grip within safe distance to the pit. After
switching the power OFF, if the safety gear does-
not grip within the value of nominal speed +2 sec-
onds close the machine brake. For example, if the
nominal speed is 3m/s the safety gear must grip
within 5 seconds.
• Secure the counterweight safety gear (if any)
by tying the safety gear lever up. This prevents
unintended gripping of the counterweight
safety gear due to jumping of the counter-
weight.
• Place test weights (equal to 100% of the rated
load) inside the car. Distribute the weights
evenly.
Änderungen vorbehalten!
Subject to change without notice!
© WITTUR – All rights reserved
Progressive Type Safety Gear
CSGB-01C
Operating instructions
Blatt/
sheet
PM.7.003609.EN.014
Datum/
date
14.07.2016
Stand/
version
Geprüft/
approved
WAT/MZE
A-02.05.2017
