4.3.3
Tolerated gripping distances
The following tables are showing the tolerated
gripping distance depending on test method and
tripping speed.
The table contains generic values based on the fol-
lowing assumptions:
•
CSGB-0x is the only active braking element
•
Rope mass, compensation ropes, pulleys
and motor without mass and inertia
•
Mass of empty car / Rated load ratio (P/Q)
between 0,6 and 2
•
Balancing (b) between 40 and 50%
It is permissible to use deviating values
when the distributor delivers a calculation
based on the system data to ensure a big-
ger range.
Note that the brake distance can differ from the
calculated values by several parameters:
Additional brake forces as motor brake, shaft effi-
ciency (friction) or motor short circuit can shorten
the gripping distance.
High inertia from pulleys, motor, ropes and com-
pensation means can cause a longer gripping dis-
tance.
Depending on the test method and the position in
the shaft the mass of the empty car / rated load
ratio (P/Q ) and the balancing (b) as well at the
unbalanced rope mass can cause a longer or a
shorter gripping distance.
Therefore it is possible to prove longer or shorter
distances by a calculation including the data from
the actual application.
Intermediate test speed values must be
rounded up and down.
Examples:
Test speed:
vtest = 1,65 m/s
Use vtest = 1,7 m/s in the belonging table.
Test speed:
vtest = 1,64 m/s
Use vtest = 1,6 m/s in the belonging table.
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.018
Datum/
date
14.07.2016
Stand/
version
Geprüft/
approved
WAT/MZE
A-02.05.2017
