Blatt/
sheet
D729MGB.018
Datum/
date
23.05.2007
Stand/
version C-07.09.2011
Geprüft/
approved WAT/MZE
Änderungen vorbehalten!
Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
4.2
Static functions test
The function of the safety gear is to be checked
with empty car and at service speed before the
real safety gear test is performed.
•
Activate the safety gear actuating lever (or
the overspeed governor rope as well by means
of the tripping function if available) manually
(about 300N). At the same time, use the
emergency control or inspection run control
to gradually lower the car.
•
After a few centimetres, the car should be
caught on the left and right by the safety
gear.
•
The safety gear contact should respond
•
Then release the safety gear by running up
the car. Check that the actuating mechanism
and the safety gear contact have returned to
their initial positions.
Version with manual resetable safety switch:
reset the safety switch manually
•
Check that both safety gears work at the
same time.
Gripping marks on the guide rails
must be the same length and on the same
height.
If the safety gears are not working simul-
taneously, the safety gear synchronisation
must be readjusted.
For rated speed lower 1,5m/s the dynamic
safety gear test can be done when the
function test is shown to be ok.
If the rated speed is above 1,5m/s, another
safety gear test must be done with rated
load in the car and at a speed of about
1,5m/s. Measure the gripping distance as
shown in section 4.4. From the tripping
speed
v
and the gripping distance s the
retardation
R
can be calculated according
to the following formula.
R = v
2
/ (2 x s)
The retardation
R
should be within 5 m/s
2
and 9 m/s
2
If the retardation is not correct the safety
gear must be replaced (please contact
WITTUR).
The real safety gear test can be performed
when the above mentioned tests are ok.
