Blatt/
sheet
D729MGB.002
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
1.1
Description and functions
The progressive type safety gear USG-25P is a
combined c-type spring, frame and friction ele-
ment, which is activated by a movable roller. The
braking force is adjusted by means of variable
machining dimensions, therefore the re-adjusting
is impossible. The safety gears are fixed normally
below the car or counterweight frame. There is
always a pair of safety gears used.
When the tripping speed of the overspeed gover-
nor is reached during downward drive, the safety
gear is engaged.
The overspeed governor rope is blocked and pulls
the lifting lever up into brake position. Both safe-
ty gears, connected by a gripping shaft will grip
at the same time.
The uniform braking of both safety gears is
caused by a good synchronisation during mount-
ing. This must be done very carefully.
The release of the safety gear is done by moving
the car or counterweight upward about 100mm.
With the exception of resetting the safety switch,
which must be done by trained personal (if the
safety gear is equipped with a manual resetable
switch), is the safety gear ready for operation im-
mediately.
If this safety component is handled with care and
scheduled examination is performed, it will be
very long live and fail save.
The operating range is defined as follows:
•
max. elevator speed
2,0 m/s
•
width of guide rail head 8 - 16 mm
•
max. mass to be gripped Fmax = 2600kg
•
governor tripping force max. 1000N
1. Spring Body
2. Gripping Roller
3. Brake lining
4. Guide plate
5. Housing (optional)
6. Lifting lever
7. Reset spring
8. Reset limiter
1
2
3
4
5
8
7
6
1
General information prior to installation
