WITTUR USG-25P User manual

Blatt/ sheet D729MGB.000
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
D729MGB 05.2018
*D729MGB$111*
Progressive Safety Gear
USG-25P
ID Unique PM.7.000342.EN
Original Instruction
Product manufacturer reference can be found on the product type label.
or any support or further questions please contact your trading office.
No part of this publication may be reproduced or translated, even in part, without prior written permission from WITTUR. We reserve the right to make alterations with respect to the specifications
and figures in this manual. Original operating instruction language is english.
www.wittur.com

Blatt/ sheet D729MGB.001
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
1 General information prior to installation
1.1 Description and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .002
1.2 Liability and guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .003
1.3 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .003
1.4 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .004
1.5 Advice for when working on safety components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .004
1.6 Content of supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .005
2 Name plate, designation, identification
2.1 Labelling according to EN81 (CE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .006
2.2 Labelling according to GOST R 53780 (Russia) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .007
2.3 Range of use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .008
3 Installation and adjustment
3.1 Mounting to the car frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .009
3.1.1 Mounting with lat bars (integrated solution) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .010
3.2 Adjustment of running clearance (gap brake lining to guide rail) . . . . . . . . . . . . . . . . . . . . . . . . .011
3.3 Dimensioning and cut of synchronisation shaft (type A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .012
3.4 Synchronisation of the safety gear (type A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .013
3.5 Assembling and adjustment of housing (type B) and synchronisation . . . . . . . . . . . . . . . . . . . . .014
3.6 Electrical installation of thesafety gear switch of housing (type B) . . . . . . . . . . . . . . . . . . . . . . .016
3.6.1 Safety gear switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .016
4 Function testing
4.1 irst acceptance test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .017
4.2 Static functions test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .018
4.3 Dynamic functions test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .019
4.3.1 Gripping test for car safety gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .019
4.3.2 Gripping test for counterweight safety gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .020
4.3.3 Checking safety gear, car and counterweight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .021
4.3.4 Visual checks after a safety gear test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .021
4.4 Gripping distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .022
4.4.1 Determining the gripping distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .022
4.4.2 Checkingthe gripping distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .022
5 Maintenance, inspection and repair
5.1 Maintenance and inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .024
5.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .024
5.1.2 Maintenance and inspection check list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .025
5.1.3 Cleaning of guide rails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .025
5.2 Periodical tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .025
5.3 Operational life time of the safety gears . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .026
5.4 Carrying out repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .026
5.5 Spare parts list (type A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .027
5.6 Spare parts list (type B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .028
6 Revision Table
Contents Page

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 max = 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
58
7
6
1 General information prior to installation

Blatt/ sheet D729MGB.003
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
1.2 iability and guarantee
This instruction handbook is written for people
who are familiar with lift servicing and installa-
tion. Sufficient knowledge of lifts is essential.
WITTUR accept no responsibility for damage
caused by improper handling, or for damage
caused as a result of actions other than those
stated in these operating instructions.
The WITTUR guarantee may be voided if parts
other than those described in these instructions
are installed.
Unless stated otherwise, the following are not
permissible due to technical safety reasons:
• The use of components other than those in-
stalled
• Carrying out modifications, of any kind on
the safety gear
• Installing two different brake heads with dif-
ferent index numbers together
• Combining different component types
• Installing progressive safety gears intended
for other employment than that stipulated
• Carrying out faulty or improper maintenance
or inspection checks
• Using unsuitable accessories, spare parts or
operating material which has neither been
re-leased by the WITTUR Company nor con-
sists of original WITTUR spare parts
1.3 Safety precautions
WITTUR machine installation or repair engineers
are chiefly responsible for the safe operation of
machinery.
It is essential to comply with and keep abreast of
all safety rules and legal obligations in order to
avoid personal / product damage during installa-
tion, maintenance and repair work.
Important safety advice and danger warnings are
emphasised with the following symbols:
General danger warning
High danger risk warning (i.e. crushing
edge, cutting edge etc.).
Risk of damage to machinery parts (e.g.
due to incorrect installation, or such like).
Important information sign
These operating instructions belong with the
whole installation and must be kept in a safe
place at all times (i.e. machine room).
The proper assembly and installation of WITTUR
safety gears requires correspondingly well trained
fitting engineers. The responsibility of training
lies with the company appointed to carry out the
work.

Blatt/ sheet D729MGB.004
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
Before starting installation work:
Only properly trained personnel may carry
out work, or be allowed access to the in-
stallation site.
- Attach safety devices to guard against falling
(platform or harnesses)
- Cover any floor openings
- Secure installation tools or objects against
accidental falling
- Lift shaft openings should be cordoned off
and suitable warning signs should be erected
when working in shaft openings
- Work involving electrical equipment should
only be carried out by an electrical engineer
or qualified personnel.
1.4 Preparation
Before beginning installation work it is in your
own interest to ascertain the constructional and
spatial conditions. Where (workshop or on site)
and when which installation operations can or
must be carried out. It is recommended therefore,
taking into account all the given circumstances,
to plan the various operational sequences in ad-
vance, rather than carrying them out prematurely
and in an unconsidered manner.
On receipt of the delivery, the goods or compo-
nents should be checked for correctness and
completeness with the order sheet.
The following should be checked also:
- that factory and order number correspond
- that the details on the name plate correspond
to those on the order
- the width and type of guide rail used
- the total load max (P+Q)
- the elevator tripping speed
1.5 Advice for when working on
safety components
Safety gears are classified as safety components.
It is most important that the standards and
guidelines described in this section be complied
with as well as those given in the rest of this op-
erating manual.
These instructions, and especially the sec-
tion on safety precautions, should be read
and fully understood before work begins.
Safety devices require special attention. It is com-
pulsory that they function perfectly to ensure
danger free installation operation.
Safety devices that can only be adjusted after in-
stallation should be done so immediately after in-
stallation.
Operation of safety devices installed ex-works
must be tested immediately.
If it is necessary to disassemble a safety device
during servicing or repair, they should be re-
assembled and comply with the required tests, as
soon as the work has been carried out.

1.6 Content of supply
Check the delivery for correctness, com-
pleteness and condition on the basis of
the order.
Depending on the order the content of supply
can cover:
- One left handed and one right handed safety
gear
- Operating instructions manual
Optional:
- Housing
- Safety switch
(manual or self resetting type)
- Synchronisation shaft
- Rope hitch
Blatt/ sheet D729MGB.005
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
Blatt/ sheet D729MGB.000
Datum/
date 23.05.2007
Stand/
version 23.05.2007
Geprüft/
approved WAT/MZE
EXCELLENCEIN COMPONENTS
Progressive Safety Gear
USG-25P
Operating Instructions
No part of this publication may be reproduced or
translated, even in part, without prior written per-
missionfrom WITTUR GmbH.
Änderungenvorbehalten!
Wereserve the right to make alterations with respect
tothe specifications and figures in this manual.
Subjectto change without notice!
WITTUR GmbH
Sowitschstrasse 1 • A-3270Scheibbs, Austria
Tel.[phone] •Fax [phone]
http://www.wittur.at•E-Mail: [e-mail]
D729MGB 05.2007
*D729MGB$111*
Progressive Safety Gear
USG-25P
Synchronisation shaft
Rope hitch
Housing
Safety switch

Blatt/ sheet D729MGB.006
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
The Type marking is located on the guide plate
(on the front side of the safety gear). The range of
use is stated on a separate sticker (Data label)
nearby on the side of the body. Additionaly a type
label and a identification label are supplied which
are to glue at the housing.
The data on the marking plate and the da-
ta label must be compared with ordering
paper and the project documents.
The Marking gives following data:
• Type term of the safety gear
• Type test designation
• Manufacturing date
• Registration number
(serial number of WITTUR manufacturing)
• Load range - Product code (see chapter 2.3)
• Guide rail nose thickness
• Data label
2 Name plate, designation, identification
Type test designation and
CE-label
Load range
Product code
Registration number
Guide rail thickness
Type term
Data label
incl. LOGO
Manufacturing date
2.1 abelling according to EN81 (CE)

additional Type label for housing:
2.2 abelling according to GOST R 53780 (Russia)
or GOST R53780 the same labelling is used as for EN81.
Additionaly the EAC-Label is supplied:
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









 
 
  






!"!  ##$
%#&'&(# ")%
$$$$""
*+*
,&##%(#%&(+
-./0 1( 
2 /0*
#/  3

& 
Blatt/ sheet D729MGB.007
Datum/
date 23.05.2007
Stand/
version E-05.04.2016
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
Type term
Load range - Product coed
Serial number
Order Number / Elevator number
(refer to delivery or order sheet)
Manufacturing date
Type-examination
number acc. to EN81
and CE-label
Mass to be gripped Guide rail thickness

Blatt/ sheet D729MGB.008
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
Rail type (manufacturing method)
acc. DIN ISO 7465 (z.B. T89/A):
A - drawn
B - machined
Rail condition:
Poiled
-- not oiled (dry)
Explanation to Data label:
Calculation method Fmax:
2.3 Range of use
K+Q+T
M1
Fahrhöhe
Travel
M2
max mass to be gripped
K = mass of the car
Q = nominal load
T = mass of the car frame
M1 = mass of travelling cable
M2 = mass of compensation rope/-chain
M = M1 + M2
max = K+Q+T+0,375xM=____kg
P masses of the empty car and components supported by the car,
i.e. part of the travelling cable, compensating ropes/chains (if any)
Q Nominal load
Product code
902560 G01
oiled
drawn (A) machined (B)
dry
drawn (A) machined (B)
650 ... 731 720 ... 809
902560 G02 732 ... 825 810 ... 912
902560 G03 826 ... 932 913 ... 1033
902560 G04 933 ... 1056 1034 ... 1173
902560 G05 1057 ... 1198 1174 ... 1338
902560 G06 1199 ... 1361 1339 ... 1531
902560 G07 1362 ... 1550 1532 ... 1759
902560 G08 1551 ... 1768 1760 ... 2028
902560 G09 1769 ... 2020 2029 ... 2346
902560 G10 2021 ... 2313 2347 ... 2600
465 ... 482 622 ... 679
483 ... 553 680 ... 748
554 ... 635 749 ... 828
636 ... 730 829 ... 920
731 ... 841 921 ... 1025
842 ... 969 1026 ... 1148
970 ... 1117 1149 ... 1291
1118 ... 1290 1292 ... 1458
1291 ... 1490 1459 ... 1653
1491 ... 1723 1654 ... 1881
902560 G11 2314 ... 26001724 ... 1995 1882 ... 2150
902560 G12 1996 ... 2310 2151 ... 2466
max (P+Q) [kg]
according to guide rail manufact. type & surface condition
The ±7,5% clause
according EN81-50 /
5.3.4 must not be
used.

Blatt/ sheet D729MGB.009
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
3.1 Mounting to the car frame
In accordance to the delivery content the manner
of how to mount it to the car frame is deviating:
• Mounting with flat bars (see chapter 3.1.1)
(e.g. integrated directly to the upright)
• Safety gear with housing (see ig.1)
• If mounting method is different, additional
documentation in included in delivery
In general:
Brake shoe and guide rail must be verti-
cally and horizontally lined up in parallel!
The following malfunction of the safety
gear may appear because of inaccurate
mounting:
• unintended gripping of the Roller
• no 100% braking extent
When mounting the safety gear, observe
the position of the overspeed governor
rope. The position of the lifting lever of
the rope at the safety gear cannot be
changed if the safety gear is built in.
<90°
<90°
ig. 1: Alignment
<90°
3 Installation and adjustment

Blatt/ sheet D729MGB.010
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
3.1.1 Mounting with Flat bars
(integrated solution)
Demands:
• rectangular cut out (e.g. in upright) of
minimum WxH = 165x135mm
• fixing holes ø12,5mm (for M12 screws) with
a height distance tolerance +0/-0,5mm
or details refer also to catalogue
D700CDEGB.1.9
Mounting:
(1) Mount upper flat bar (10mm thick material)
(2) Put in the safety gear (from back throuch the
cut out) and secure with lower falt bar
(3) Hang in the reset spring (spring force
1=35-40N, spring rate ~1,4N/mm)
and mount the reset limiter screw (M8)
Ensure correct alignment to guide rail (see
chapter 3.2)
Note: the tightening momentum for M12
is 80Nm
Note: the tightening momentum for M8 is
10-13Nm
(4) Repeat this sequence on the other safety gear

3.2 Adjustment of running clearance
(gap brake lining to guide rail)
After mounting and alignment of the safety gear,
adjust the running clearance “A” (see ig.2).
Adjustment (on sample option housing):
(1) Check, if the safety gear can be moved side-
ways easily (move by hand manualy)!
(2) Ensure that the gripping roller rests in it’s ini-
tial most bottom position.
Refer also to synchronisation adjustment
(chapter 3.4)
(3) Adjust the running clearance of 3,0+0/-0,5mm
between brake lining (3) and guide rail by
means of the limiter screw (8)
(4) Lock the limiter screw (8) with the counter
nuts
Check the horizontal alignment!
The brake lining edge have to be on the
same level as the guide rail nose edge
(5) Repeat this adjustment se-
quence on the other safety
gear
Check the horizontal
movement of the safety
gears - the movement
should be able to be
done easily by hand. Be
sure that brake lining (3)
is able to access the
guide rail when safety
gear is activated.
Blatt/ sheet D729MGB.011
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
DBG
A=3,0mm+0/-0,5
fig. 2: Running clearance
8
3

Blatt/ sheet D729MGB.012
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
The Synchronisation shaft is drilled and pinned
during installation (clamping sleeve strong
DIN1481 ø8x40mm)
Note:
drill hole diameter 8mm
3.3 Dimensioning and cut of synchro-
nisation shaft (type A)
Dimension:
Shaft dim. = S235JRG2 / ø30 x 3,5mm
Length = DBG -140mm
Installation situation:
clamping sleeve
ø8x40mm

Blatt/ sheet D729MGB.013
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
Both safety gears must operate synchronous.
Check the Synchronising of both safety
gears in up- and downward direction.
Use e.g. paper strips. Pull the activation lever on
the contact point of over speed governor rope up
and down and check if both paper strips will be
clamped by the gripping roller.
If necessary readjust by use of the screw (11).
Check again the Synchronising of both
safety gears in up- and downward direc-
tion.
3.4 Synchronisation of the safety gear (type A)
11

3.5 Assembling and adjustment of
housing (type B) and synchronisa-
tion
Both safety gears must operate synchro-
nous.
If there is safety gear delivered with safety gear
housing and synchronisation do the assembling
and adjustment as follows:
(1) it the synchronisation-axles (1) into the low-
er cross beam of the car frame - insert the
sliding-bushes (2) and fix the axle with the
delivered clamping-flats (3).
(2) Mount the safety gear housing (4) to the low-
er cross beam of the car frame (by means of
treated-plates (5) and screws M16x40)
Take care of tightening torque
Screw M16: 195Nm
(3) it the safety gear lifting lever (6) to the syn-
chronisation-axle-plate (1)
let a gap of 0,5mm by means
of the self locking nut
Blatt/ sheet D729MGB.014
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
1
4
5
(2)
(3)
2
3
M16x40
gap ~0,5mm
1
6
(1)

Blatt/ sheet D729MGB.015
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) Install the synchronisation rod (7) to the axle-
plates (1) - secure with pin (8). Adjust the
length by means of the adjustment nuts and
lock with lock nuts (9).
(5) Mount the fixing bracket (10) to the cross-
beam profile and hook in the synchronisation
retaining spring (11)
(6) ix the governor rope hitch (13) to the safety
gear lever - install the governor rope (use de-
livered rope clips).
(7) it the safety gear switch (12) to the beam
profile
(8) Check the safety gear - synchronisation
function. If both safety gears do not
grip at the same time (refer also to
chapter 3.3), adjust the length of the
synchronisation rod by use of the ad-
justment nut.
7
8
(4)
(5)
7
9
10
11
Rope clip
Adjustment nut
(6)
12 Switch cam
(7)
13

Blatt/ sheet D729MGB.016
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
(1) Connect the contact
(2) Test the safety gear switch function - adjust
if necessary
(3) Adjust the switch horizontally on its fixing
bracket.
Adjusting dimension: 3-5 mm from the
guard peak
The contact must break just before safety
gear gripping!
3.6.1 Safety gear switch
- utilization category: AC-15
Ue/Ie240V / 3A
- conv. thermal current: Ithe = 10A
- rated insulation voltage: Ui= 250V AC
- protection type: IP 43
- approved in accordance: DIN VDE 0470 T1
IEC/EN 60947-5-1
- protection class: II, totally insulated
(1-3)
Safety gear switch
3.6 Electrical installation of the
safety gear switch of housing
(type B)
Work involving electrical equipment
should only be carried out by an electrical
fitter or qualified personnel.
Before carrying out work, switch off all
voltage to installation equipment.
Take note of the following when laying
the connection cable:
• that the single polarity cables have
double insulation
• the use and laying of cables is governed
by the EMC
The safety gear contact opens the lift in -
stal lation’s remotely controlled safety cir-
cuit.
23 24
11 12

Blatt/ sheet D729MGB.017
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
4.1 First acceptance test
Operational reliability of the installation is as-
sured. The quality and function of individual com-
ponents are subject to thorough inspection and is
checked before dispatch from our works. The
safety gear system should undergo an opera-
tional test before commissioning or before possi-
ble inspection done from the local authorities.
First test run after installation
Before the first test run:
Clean the guide rails!
The protective coating of grease is to be
carefully removed from the guide rails!
The cleaning of the guide rail must be
done with a disc brake cleaner or a similar
fluid. It is not allowed to do mechanical
cleaning like filing, grinding. If the surface
cannot be cleaned properly contact the
guide rail manufacturer.
Clear all people and objects from the lift
shaft before commencing the test run
Risk of crushing injuries!
The entire lift travel path should be slowly trav-
elled (in inspection mode) before the functions
tests. Attention should be paid to the clearance of
all fastened parts, especially with regards to the
guide brackets/safety gear devices. ind and re-
move any protruding bolts or other dangerous re-
strictions well in advance.
Preparations before tests:
When sliding guides shoes are used, a thin
coating of the guide rail oil is to be ap-
plied to the guide rails.
When roller guide shoes are used the
guide rail may not be lubricated at all.
The lubrication oil may not include high
pressure additives.
• Check the activating force of the safety gear
synchronisation (it should be between 200
and 250 N). This value can be higher if the
travel is over 75m. Calculate the minimum re-
quired force 1as follows:
1= mass of overspeed governor rope x down-
wards acceleration x safety factor (2)
e.g.: 1min = 80kg x 1,5m/s 2 x 2=240N
This is the minimum force which should be
measured on the safety gear synchronisa-
tion to prevent unintended gripping. If the
force is less than the retaining spring of
the safety gear synchronisation must be
adjusted.
• Check the tripping force of the overspeed
governor 2:
This force must be at least twice as high as
the force measured on the safety gear
synchronisation.
e.g.: 1= 240N =>
2min = 2 x 1= 2 x 240 = 480N
The maximum tripping force 2max of the
overspeed governor is 1100N +100N.
4 Function testing

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.
or 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. rom the tripping
speed vand the gripping distance s the
retardation Rcan be calculated according
to the following formula.
R = v2/ (2 x s)
The retardation Rshould be within 5 m/s2
and 9 m/s2
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.

Blatt/ sheet D729MGB.019
Datum/
date 23.05.2007
Stand/
version G-07.05.2018
Geprüft/
approved WAT/MZE
Änderungen vorbehalten! Subject to change without notice!
Progressive Safety Gear
USG-25P
Operating Instructions
4.3 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 ele-
vator 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 dam-
age 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.
4.3.1 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 pre-
vents unintended gripping of the counter-
weight safety gear due to jumping of the
counterweight.
• Place test weights (equal to 125% of the rat-
ed 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
governor 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.
With gearless elevators:
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 O , if the safety gear does
not grip within the value of rated speed + 2 sec-
onds close the machine brake. or example, if the
rated speed is 3 m/s the safety gear must grip
within 5 seconds.
• Secure the counterweight safety gear (if any)
by tying the safety gear lever up. This pre-
vents unintended gripping of the counter-
weight safety gear due to jumping of the
counterweight.
• Place test weights (equal to 100% of the rat-
ed load) inside the car. Distribute the weights
evenly.