WITTUR OL20 User manual

© Copyright WITTUR 2016
www.wittur.com
OL20
No part of this publication may be reproduced or translated, even in part, without prior written permission
from WITTUR. We reserve the right to modify all specications and images included in these instructions.
Subject to change without notice!
OVERSPEED GOVERNOR
OPERATING INSTRUCTIONS
Code PM.7.005825.EN
Version -
Date 27.05.2021
*pM.7.005825.en$111*
Original instructions
Product manufacturer references can be found
on the name plate. For any support or further
questions please contact your local distributor.

Overspeed Governor
OL20
Operating instructions
Subject to change without notice! © Copyright WITTUR 2016
Content Page
Sheet PM.7.005825.EN.02
Version -
Date 27.05.2021
Approved WAT/KKR
1. General information prior to installation
1.1 Description and functions........................................................................................................ 4
1.2 Liability and guarantee ............................................................................................................ 5
1.3 Safety precautions .................................................................................................................. 5
1.4 Preparation ............................................................................................................................. 6
1.5 Advices for the work on safety components.............................................................................. 6
1.6 Scope of supply ...................................................................................................................... 7
2. Name plate, designation, identification
3. Mechanical installation and adjustment
3.1 General................................................................................................................................... 9
3.1.1 Handling of the OL20............................................................................................................... 9
3.1.2 Permissible Forces.................................................................................................................. 9
3.1.3 Fixing possibilities ................................................................................................................ 10
3.1.4 Installation tolerances ........................................................................................................... 10
3.1.5 Installation ........................................................................................................................... 10
3.2 Installing the overspeed governor........................................................................................... 11
3.2.1 Prior to installation................................................................................................................ 11
3.2.2 Installing in the machine room .............................................................................................. 12
3.2.3 Shaft head installation........................................................................................................... 13
3.3 Roping of the overspeed governor .......................................................................................... 14
3.4 Variants of OL20 overspeed governor arrangements ............................................................... 14
3.5 Electrical installation and adjustment..................................................................................... 15
3.5.1 Overspeed contact ................................................................................................................ 15
3.5.2 remote control ...................................................................................................................... 16
3.6 Attaching the safety cover ..................................................................................................... 16
4. Function testing
4.1 Static function test:............................................................................................................... 18
4.1.1 Overspeed governor with manual tripping: .............................................................................. 18
4.1.2 Overspeed governor with remote control:................................................................................ 18
4.2 Dynamic function test............................................................................................................ 19
4.2.1 Check of the electrical tripping:.............................................................................................. 19
4.2.2 Check of mechanical tripping................................................................................................. 19
4.2.3 Check of tripping speed (CS / TS):.......................................................................................... 19
4.3 Tripping speed adjustment..................................................................................................... 20
5. Maintenance, inspection and repair
5.1 Maintenance and inspection .................................................................................................. 21
5.2 Mandatory checks/tests and periods...................................................................................... 21
5.3 Inspection checks ................................................................................................................. 22

Overspeed Governor
OL20
Operating instructions
Subject to change without notice! © Copyright WITTUR 2016
Sheet PM.7.005825.EN.03
Version -
Date 27.05.2021
Approved WAT/KKR
5.3.1 General checkings................................................................................................................. 22
5.3.2 Check the rope pulley ........................................................................................................... 22
5.3.3 Check the condition (wearing) of the wheel rope groove ......................................................... 22
5.3.4 Check the tripping pawl ......................................................................................................... 22
5.3.5 Check the adjustment spring.................................................................................................. 23
5.3.6 Check the condition of the wheel bearing ............................................................................... 23
5.3.7 Check the function of the overspeed contact .......................................................................... 23
5.4 Check the cleanness of the governor ..................................................................................... 23
5.5 Functional checks ................................................................................................................ 23
5.5.1 Tripping speed (CS/TS).......................................................................................................... 23
5.5.2 Brake force (lifting force) of the overspeed governor............................................................... 23
5.5.3 Measuring of the brake (lifting) force by 1/2 tension weight mass ........................................... 24
5.5.4 Measuring of the brake (lifting) force with force gauge............................................................ 24
5.6 Carrying out repairs............................................................................................................... 25
5.6.1 Tensioning the governor rope................................................................................................. 25
5.7 Spare parts ........................................................................................................................... 25
5.8 Operational lifetime of the Governor....................................................................................... 25
5.9 Disposal of waste.................................................................................................................. 25
6. Revision table

Overspeed Governor
OL20
Operating instructions
Subject to change without notice! © Copyright WITTUR 2016
Sheet PM.7.005828.EN.04
Version -
Date 27.05.2021
Approved WAT/KKR
1. General information prior to installation
1.1 Description and functions
The overspeed governor is a safety device that comes
into operation when the lift car exceeds its permitted
speed.
When the lift exceeds it’s nominal speed about a
predetermined value, the overspeed governor causes
the lift to stop, and in down direction if necessary also
causes the safety gear to be applied.
The basic functions of the governor are to detect
overspeed mechanical and electrically:
• to stop the elevator drive electrically
• to activate the safety gear mechanical
A tension weight is needed to tighten the rope of the
overspeed governor.
OL20
nominal speed 0,3 - 0,63m/s
0,7/1/1,5/1,6/1,75m/s
Rope diameter 6mm
Rope type steel wire rope bre core
Rope quality 1770N/mm²
System height max. 90m
Tension weight min. 400N
brake force min. 300N
Operating Temp. +5°C ... + 55°C *)
Storage Temp. -25°C ... + 60°C
*) For lifts according EN81: +5..... +40°C, General
temperature range if no tighter range is stated in the
local valid code: +5..... +55°C
If the nominal elevator speed is exceeded, the activation
bolt (1) on the tripping pawl (2) will hit the safety switch
(3) to switch off the safety circuit. If the speed still
increases, the tripping pawl (2) will grip into the rotating
trip wheel (4), which will block the governor wheel (5)
and activate the safety gear. If the force in the rope
exceeds the brake force, the rope in wheel starts to slip
inside the trip wheel groove. This is to protect rope and
the safety gear system from damage.
Travel upwards: In upwards direction the safety circuit
is switched off in the same way and at same speed as
for downwards direction. The safety gear will not be
activated in upward direction!
1. Rope pulley
2. Adjustment spring
3. Overspeed contact
4. Tripping pawl
5. Remote control magnet
6. Roller
7. Rope Guard
8. Cam

Overspeed Governor
OL20
Operating instructions
Subject to change without notice! © Copyright WITTUR 2016
Sheet PM.7.005828.EN.05
Version -
Date 27.05.2021
Approved WAT/KKR
1.2 Liability and guarantee
This instruction manual is written for people who are
familiar with elevator maintenance and installation.
Sufcient knowledge of elevators is essential.
WITTUR does not take 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 is not permissible
due to technical safety reasons:
• The use of components other than those installed,
• carrying out modications of any kind on the safety
gear,
• installing two different safety gears with different se-
rial numbers together,
• destruction of the seal. If the seal has been damaged,
the complete set of safety gears has to be replaced!
• Combining different component types,
• installing progressive safety gears intended for em-
ployments other than those stipulated,
• carrying out faulty or improper maintenance or in-
spection checks,
• using unsuitable accessories, spare parts or operat-
ing material which has neither been released by the
WITTUR company nor consists of original WITTUR
spare parts.
1.3 Safety precautions
Installers and maintenance personnel are fundamentally
responsible for their safety while working. The
monitoring and following of all valid safety rules and
legal conditions is required in order to prevent personal
injury and damage to materials during installation,
maintenance and repair work. This especially refers to
the corresponding accident prevention rules.
Important safety advice and danger warnings are
emphasized with the following symbols:
General danger warning
High risk danger warning (i.e. crushing edge,
cutting edge etc.)
Risk of damage on machinery parts (i.e. due to
incorrect installation etc.)
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, tting
engineers. The responsibility of training lies with the
company appointed to carry out the work.

Overspeed Governor
OL20
Operating instructions
Subject to change without notice! © Copyright WITTUR 2016
Sheet PM.7.005828.EN.06
Version -
Date 27.05.2021
Approved WAT/KKR
Before starting installation work:
Only properly trained personnel may carry out installation
work or be allowed access to the installation site.
-Attach safety devices to guard oneself from falling
(platform or harnesses).
-Cover any oor openings.
-Secure installation tools or objects against
accidental falling.
-Elevator 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 qualied
personnel.
1.4 Preparation
Before starting assembly or installation work, it is in your
own interest to clarify the constructional and spatial
conditions as well as where (workshop or on site),
when and which installation operations can or must
be carried out. It is therefore recommended to take all
given circumstances into account and to plan various
operational sequences in advance, rather than carrying
them out prematurely and in an unconsidered manner.
On the receipt of the delivery, the goods or components
should be checked for correctness and completeness
with the order sheet.
The following should also be checked:
-The factory and the order number must correspond.
-The details on the name plate must correspond to
those on the order sheet.
-The elevator speed,
-the width and the type of guide rail used,
-the total load (mass to be gripped).
1.5 Advices for the work on safety components
Overspeed governors are classied as safety
components. It is most important for this product to
take into account all standards and guidelines described
in this section as well as other information given in this
operating manual.
These instructions, especially the section on
safety precautions, should be read and fully
understood before work begins.
Safety devices require special attention. Their proper
functioning is essential for a safe operation of the
system.
Safety devices which can only be adjusted after
installation must take place immediately after
installation.
If safety devices are already factory-preset, the function
of those must be checked and tested immediately.
Should it be necessary to disassemble a safety device
during servicing or repair, they are to be reassembled
and checked with the required tests and returned as the
work is carried out.

Overspeed Governor
OL20
Operating instructions
Subject to change without notice! © Copyright WITTUR 2016
Sheet PM.7.005828.EN.07
Version -
Date 27.05.2021
Approved WAT/KKR
1.6 Scope of supply
After delivery, the safety gear has to be checked for
damage and completeness. The scope of supply covers:
-Operating instructions manual
-Overspeed governor pre adjusted and calibrated at
the factory (right or left handed)
-Remote control (pre assembled; optional)
-different types of Safety covers
-different types of bases (optional)
-Mounting- and xing screw-packages

Overspeed Governor
OL20
Operating instructions
Subject to change without notice! © Copyright WITTUR 2016
Sheet PM.7.005828.EN.08
Version -
Date 27.05.2021
Approved WAT/KKR
2. Name plate, designation, identication
The overspeed governor OL20 identication indicators
are provided on the name plate which is located on the
front side of the governor
These consist of a name plate and an identication
sticker which gives the following data:
• Type term of overspeed governor
• Serial number
• Elevator number
• Nominal speed
• Safety circuit switch-off speed
• Mechanical tripping speed
• Rope diameter
The overspeed governor is pre-adjusted and
calibrated at the factory. No re-adjustment is
allowed.
Imaging of label
-EN81-20/50
Ground silver, letters black
Character style for datatable: Arial
Grund Silber, Schrift Schwarz
Schriftart Datentabelle: Arial
WITTUR
40
70
WITTUR
P01
Serial-No.:
Elevator-No.:
Prod.Date:
XXXXXXXAXX-SIDE-Y
OL20
CS
V
TS
V
#,##
m/s #,##
m/s #,## m/s
V
NS
#,# mm
Tripp. direction
Traceability
1068276P01
Type-Label (CB = EN81)
Wittur 11

ID No.
2D
Code
Wittur elevator components India Pvt. Ltd.
Survey nos 45/1B, 3&4, Pondur Village
Sriperumbudur - 602 105, Tamil Nadu, INDIA
Rope diam.:
Tripp. direction
right
left
Certificate number
Variable
Content according
(dependent on customer)
XXXXXXXAXX-SIDE-Y
XXXXXXX: main drawing nr.
AXX: OL Variant
SIDE: CAR or CWT (EN)
Y: Tripp direction (L/R)
Serial-No.
Serial number #########
Elevator-No. Elevator number
Prod. Date YYYY-MM-DD
V NS/ V custom nominal speed
V CS/ V
adjusted contact speed
V TS/ V adjusted tripping speed
custom rope diameter
2D Traceability code according 904554
P01 R2211 Polyester For Labels 0.11
PART
TEIL
LOCAL INFO WAT
LOKALE INFO WAT
ITEM NO.
ARTIKELNR.
DESCRIPTION
**...spec. acc. to WITTUR material datasheet
BESCHREIBUNG
**...Spez. lt. WITTUR Materialdatenbank
SURFACE TREATMENT
OBERFLÄCHENBEH.
MASS[kg]
MASSE[kg]
19/08/2021
AT1LatsLAT1LatsL - initial version
-
PCP01
A3
SIZE
2:1
SCALE
PRODUCT CODE
OL20
PRODUCT CATEGORY
7 - SAFETIES
ADD. DESCRIPTION
Type label
DESCRIPTION
1068276
DRAWING NUMBER
ISO1101
B
FUNCTIONAL CLASS
GT2
GEN. TOLERANCE WST-00033
ISO1302
ALLG. TOLERANZ WST-00033
GEOM. TOLERANZ SYMBOLEOBERFLÄCHE SYMBOLE
FUNKTIONSKLASSE
ZUS. BESCHREIBUNG
BESCHREIBUNG
ZEICHNUNGSNUMMER ERSTE FREIGABE
DATUM
MAßSTAB
DATUM
INDEX
PRODUKTKATEGORIE
BLATT
FORMAT GEZEICHNET VON
PRODUKTKODE
KONSTRUIERT
Typenschild
AT1LatsL
AT1LatsL
DATE
1/1
DESIGNED BY
SHEET REVISION FIRST APPROVAL
-
DATE
DRAWN BY
Checked
PCP01
17/12/2020
©WITTUR HOLDING GmbH
-
A
B
C
D
E
F
1 2 3 4 5 6 7 8
The reproduction, distribution and utilization of this document as well as the communication of its contents to others without express authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or design.
V5.0
Revision Qty. Description Change no. Done by Approved by Date of issue
Weitergabe sowie Vervielfältigung dieses Dokuments, Verwertung und Mitteilung seines Inhalts sind verboten, soweit nicht ausdrücklich gestattet. Zuwiderhandlungen verpflichten zu Schadenersatz. Alle Rechte für den Fall der Patent-, Gebrauchsmuster- oder Geschmacksmustereintragung vorbehalten.
SURFACE TEXTURE SYMBOLS GEOM. TOLERANCE SYMBOLS
nominal speed
v=(m/s)
Factory ID
Serialnumber
Traceability Code Tripping direction
Manufacturer
Type test
designation and
CE number
Rope diameter
(mm)
safety circuit switch
off speed (m/s)
Tripping speed
(m/s)
Date of manufacture

Overspeed Governor
OL20
Operating instructions
Subject to change without notice! © Copyright WITTUR 2016
Sheet PM.7.005828.EN.09
Version -
Date 27.05.2021
Approved WAT/KKR
3. Mechanical installation and adjustment
3.1 General
Check the direction of rotation: When the car /
counterweight travels downwards, the governor
has to rotate in the arrow direction. Arrow is
shown on type label. (Front side of governor)
3.1.1 Handling of the OL20
Do not lubricate the rope groove of the governor
rope pulley with any oil or grease This might
reduce the braking force!
Do not take/carry the governor by overspeed
contact or spring
Do not use hammers for any adjustment/
alignment actions!
Do not remove any assembly aids (cable ties) before both
mechanical installation and adjustment are nished!
3.1.2 Permissible Forces
OL20
Governor Weight ~5,3kg
max. tension force
(TW + rope mass) 1100N
Rope type steel wire rope bre
core (bright)
Rope diameter 6mm
Rope quality 1770N/mm²
min. breaking force of the
rope (in accordance with
EN 12385-5)
21KN
Tension weight min. 400N
brake force min. 300N
Only Governor ropes with low grade of lubrication
are allowed to be used!
M10x25 - 8.8
Arrow indicating the
governor tripping
direction
Electrication of the
safety circuit contact,
refer to wiring diagram

Overspeed Governor
OL20
Operating instructions
Subject to change without notice! © Copyright WITTUR 2016
Sheet PM.7.005828.EN.010
Version -
Date 27.05.2021
Approved WAT/KKR
3.1.3 Fixing possibilities
OL20 can only be xed in standing position
3.1.4 Installation tolerances
The over speed governor must be installed
vertically.
The overspeed governor must be installed in a
way so that the governor rope runs parallel into
the wheel groove!
The max. allowed tolerances are:
• Rope diameter = 6mm
3.1.5 Installation
The OL20 could be used at facilities according to
EN81-20.
Test groove