Gearless elevator:
• Switch the main power OFF. Open the machine
brake manually and let the counterweight
accelerate to the tripping speed of the over-
speed governor. The overspeed governor
should trip, which will engage the safety gear
and stop the counterweight.
Do not let the counterweight run onto the
buffer.
Geared elevator:
• Accelerate the counterweight with the hoist-
ing motor to the nominal speed, keep the
machine brake open manually, switch the
main power OFF and let the counterweight
accelerate to the tripping speed of the over-
speed governor. The overspeed governor
should trip, safety gear engage and counter-
weight stop.
Do not let the counterweight run onto the
buffer.
• Try to drive the counterweight down to check
that the safety gear has engaged (suspension
ropes should slide on the traction sheave).
4.2.3
Checking safety gear, car and counter-
weight and returning the elevator to
normal drive
• Release the safety gear by driving the car or
counterweight up.
max. Force to lift the elevator after gripping:
F = ( 1,3 x Fmax - mcwt ) x g
F ........... lifting force [N]
Fmax ... mass to be gripped [kg]
mcwt ... mass of counterweight [kg]
g ........... gravity 9,81 [m/s²]
• Remove test weights (if applicable).
• Reset the overspeed governor (if needed).
• Remove temporary securing of the safety gear
(if applicable).
• Check from the gripping marks if left and
right safety gear gripped at almost the same
height.
4.2.4
Visual checks after a safety gear test
• Check that the inclination of the car, car sling
or counterweight frame, in any direction, is
not more than 5% (for example car floor is not
horizontal or car entrance is not parallel with
landing door entrance). A visual check is suffi-
cient.
• Safety gear:
Drive the car to the lowest floor and check
from the pit following items:
- existence of tripping wedge
- existence of brake lining
- visual defects of safety gear parts
- defects on the Synchronisation resp.
governor linkage
- defects on the safety gear housing
• Check that the actuating mechanism and the
safety gear contact have returned to their ini-
tial positions
If there is any defect the safety gear must
be replaced!
After the safety gear test the burrs must be
removed from the guide rails.
If deviations from the permitted limits had
been noticed during safety gear test please
contact us at WITTUR.
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.016
Datum/
date
14.07.2016
Stand/
version
A-02.05.2017
Geprüft/
approved
WAT/MZE
