WITTUR EBRA20 User manual

Braking System EBRA20
Operating instruction
Braking System EBRA20
Blatt/ sheet D7AJMGB.000
Datum/
date 23.05.2002
Stand/
version B-24.05.2005
Geprüft/
approved WAT/MZE
D7AJMGB 05.2005
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
No part of this publication may be reproduced or
translated, even in part, without prior written permis-
sion from WITTUR GmbH.
Änderungen vorbehalten!
We reserve the right to make alterations with respect
to the specifications and figures in this manual.
Subject to change without notice!
WITTUR GmbH
Sowitschstrasse 1 • A-3270 Scheibbs, Austria
Tel. [phone] •Fax [phone]
http://www.wittur.at •E-Mail: [e-mail]

Contents Page
1 General information prior to installation
1.1 Description and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.002
1.2 Liability and guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.003
1.3 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.003
1.4 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.004
1.5 Advice for when working on safety components . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.004
1.6 Content of supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.005
2 Name plate, designation, identification . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.006
3 Installation
3.1 Installation of EBRA20 to the car frame crosshead beam . . . . . . . . . . . . . . . .D7AJMGB.007
3.2 Preparations and installations in the machine room . . . . . . . . . . . . . . . . . . . .D7AJMGB.009
3.3 Electrical installation of the braking system . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.009
4 Adjustment tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.010
5 Function testing
5.1 Static functions test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.011
5.2 Dynamic functions test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.012
5.2.1 Visual checks after a braking test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.012
6 Maintenance, inspection and repair
6.1 Maintenance and inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.013
6.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.013
6.1.2 Cleaning of guide rails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.013
6.1.3 Returning tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.014
6.2 Maintenance and inspection check list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.014
6.2.1 Checking and changing the brake shoe . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.015
6.2.2 Checking and changing the brake fork sliding elements . . . . . . . . . . .D7AJMGB.015
6.2.3 Checking and changing the car sliding shoe . . . . . . . . . . . . . . . . . . . .D7AJMGB.016
6.2.4 Changing the battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.016
6.3 Carrying out repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.017
6.4 Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.017
6.5 Rescuing trapped passengers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.017
6.5.1 Power ON and the OSG switch has been switched OFF . . . . . . . . . . . .D7AJMGB.019
6.5.2 Power OFF, but the OSG switch has not been switched OFF . . . . . . .D7AJMGB.020
6.5.3 Car cannot be moved following 1 and 2 . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.020
6.6 Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D7AJMGB.021
Blatt/ sheet D7AJMGB.001
Datum/
date 23.05.2002
Stand/
version B-24.05.2005
Geprüft/
approved WAT/MZE
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
Änderungen vorbehalten! Subject to change without notice!
Braking System EBRA20
Operating instruction

1.1 Description and functions
The EBRA20 guide rail brake is used as an ascend-
ing car over speed protection safety device.
EBRA20 is used when the motor-brake effects not
direct to the traction sheave or to the axle of the
traction sheave quite near of this. It acts onto the
car guide rail an reduces the car speed according
to the regulations (EN81-1:1998 9.10.4). The brake
operates with two spring loaded brake shoes an is
opened by an electro magnetic coil. The max.
retardation is 1.0 g.
The brake is installed above the overhead beams of
the sling and it replaces the sliding guide shoe of
the car (the guide shoe of the car is integrated to
the brake body - to be used with sliding guide
shoes only).
EBRA20 is a stand alone braking system which only
needs the tripping information (over speed gover-
nor switch) from the elevator.
The EBRA20 may be used for electrical operated
passenger an goods lifts according EN81-1. The
system does not substitute the safety gear for
down direction.
The settings are carried out in the factory (accord-
ing to the elevator data) an sealed.
The operating range is defined as follows:
• Max. nominal speed 2.0m/s
• Nominal load Q 240 - 2000kg
• Width of guide rail head 7 - 19mm
• Max. guide forces during normal running
F = 2000N
• Weight of one EBRA20 30kg
• Power supply 230 VAC
1. Brake switch
2. Connection cable
3. Lubricator cup
4. Sliding element
5. Brake shoe
6. Sliding guide shoe
7. Base plate
Blatt/ sheet D7AJMGB.002
Datum/
date 23.05.2002
Stand/
version 23.05.2002
Geprüft/
approved WAT/MZE
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
Änderungen vorbehalten! Subject to change without notice!
1 General information prior to installation
Braking System EBRA20
Operating instruction
5
6
7
2
1
3
4

Braking System EBRA20
Operating instruction
1.2 Liability 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 stat-
ed 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 per-
missible due to technical safety reasons:
• The use of components other than those
installed
• Carrying out modifications, of any kind on the
brake system
• Installing two different brake heads with dif-
ferent index numbers together
• Destruction of the lead seal
• Combining different component types
• Installing braking systems 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 consists 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
emphasized with the following symbols:
General danger warning
High danger risk warning (i.e. crushing
edge, cutting edge etc.).
Risk of damage to machinery parts (i.e. 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
brake systems requires correspondingly well
trained fitting engineers. The responsibility of
training lies with the company appointed to carry
out the work.
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
Änderungen vorbehalten! Subject to change without notice!
Blatt/ sheet D7AJMGB.003
Datum/
date 23.05.2002
Stand/
version 23.05.2002
Geprüft/
approved WAT/MZE

Braking System EBRA20
Operating instruction
Before starting installation work:
Only properly trained personnel may carry
out work, or be allowed access to the
installation 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 advance,
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 com-
pleteness with the order sheet.
The following should be checked also:
- that the factory and order number correspond
- that the details on the name plate correspond
to those on the order
- the elevator speed
- the width and type of guide rail used
- the nominal load (Q)
1.5 Advice for when working on
safety components
The Brake system EBRA20 is classified as safety
components. It is most important that the stan-
dards and guidelines described in this section be
complied with as well as those given in the rest of
this operating 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
installation should be done so immediately after
installation.
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 reassem-
bled and comply with the required tests, as soon as
the work has been carried out.
Blatt/ sheet D7AJMGB.004
Datum/
date 23.05.2002
Stand/
version 23.05.2002
Geprüft/
approved WAT/MZE
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
Änderungen vorbehalten! Subject to change without notice!

Braking System EBRA20
Operating instruction
1.6 Content of supply
After delivery, check the brake system for damage
and for full delivery of parts. The content of sup-
ply covers:
- Operating instructions manual
- One pcs. EBRA20 (Q<1000kg) or
two pcs. EBRA20 (1000<Q<2000kg)
pre-adjusted and sealed at the factory
- Electrical interface (optional):
• Controller box (incl. electronics
and battery)
• Electronics (separate)
• Battery (separate)
- Mechanical interface (optional):
• Adapter plate to car frame
• Fixing screw-packages
Blatt/ sheet D7AJMGB.005
Datum/
date 23.05.2002
Stand/
version 23.05.2002
Geprüft/
approved WAT/MZE
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
Änderungen vorbehalten! Subject to change without notice!
Braking System EBRA20
Operating instruction
Braking System EBRA20
Blatt/ sheet D7AJMGB.000
Datum/
date 23.05.2002
Stand/
version 23.05.2002
Geprüft/
approved WAT/FLE
D7AJMGB 05.2002
THELMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
No part of this publication may be reproduced or
translated,even in part, without prior written permis-
sion fromWITTUR GmbH.
Änderungenvorbehalten!
Wereserve the right to make alterations with respect
to the specifications and figuresin this manual.
Subjectto change without notice!
WITTUR GmbH
Sowitschstrasse 1 • A-3270 Scheibbs, Austria
Tel.[phone] •Fax [phone]
http://www.wittur.at•E-Mail: [email protected]
Controller box
Electronics
Battery

The EBRA20 identification indicator is located on
the top of the brake connection box.
It gives following data:
• Type term
• Serial number
• Elevator number
• Tripping speed
• Nominal load
Number of brakes (1... Q<1000kg)
(2... 1000<Q<2000kg)
• Rail head width
• Spring adjustment dim. (B)
The EBRA20 is preset in the factory and should not
be adjusted on site conditions.
Spring length (B) is measured when EBRA20 is on
the rail and braking and should be +/-1 mm from
the value given.
Blatt/ sheet D7AJMGB.006
Datum/
date 23.05.2002
Stand/
version 23.05.2002
Geprüft/
approved WAT/MZE
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
Änderungen vorbehalten! Subject to change without notice!
2 Name plate, designation, identification
Braking System EBRA20
Operating instruction
Type test designation
and CE-label
Tripping speed vmax = (m/s)
Nominal load
Q = (kg)
Serial number
Order number - Elevator number
(refer to delivery or order sheet)
Typ termDate of manufacture

Braking System EBRA20
Operating instruction
3.1 Installation of EBRA20 to the car
frame crosshead beam
The installation could be done during car frame
assembling (refer to chapter crosshead beam
installation) or also afterwards if the elevator is to
be modernized.
Check that there is two spare wires in trav-
elling cable (A) - otherwise install a new
travelling cable.
(1) Fix car sling in position to guide (if modern-
ization)
(2) Remove the old sliding shoe of the car (B) and
possible other fixings above the car frame
crosshead beam
(3) Fix the adapter plate(s) (C) to the crosshead
beam - drill fixing holes ø14mm to the beams
if required.
Take care of tightening torque
Screw M12: 80Nm
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
Änderungen vorbehalten! Subject to change without notice!
3 Installation
Blatt/ sheet D7AJMGB.007
Datum/
date 23.05.2002
Stand/
version 23.05.2002
Geprüft/
approved WAT/MZE
(1-3)Screw package
601775G04
B
C

(4) Fix the EBRA(s) (D) on the adapter plate
There are two EBRA20 units when nominal
load of the lift is above 1000kg.
Take care of tightening torque
Screw M12: 80Nm
(5) Connect the connection cables from each
brake unit to the car roof terminal box (E).
The brake switch contact is wired in series
with the safety gear contact in lift safety
circuit.
Blatt/ sheet D7AJMGB.008
Datum/
date 23.05.2002
Stand/
version 23.05.2002
Geprüft/
approved WAT/MZE
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
Änderungen vorbehalten! Subject to change without notice!
Braking System EBRA20
Operating instruction
(4)
(5)
Screw package
601775G04
D
E
A

Braking System EBRA20
Operating instruction
Refer also to chapter 3.3 Electrical installa-
tion of the braking system.
(1) Change the whole overspeed governor (OSG)
and the cable (A) if it is not equipped with a
switch with two NC-contacts (F).
(2) Install the controller box (B) to the machine-
room wall and connect the cables (C) from the
box to the controller cabinet.
The following conditions / interfaces are required
to operate the EBRA20:
• Overspeed governor contact switch with
two NC-contacts
• 230 VAC power supply including 6 A fuse
• two strands in travelling cable
• Brake switch of EBRA20 to be connected in
safety circuit
Blatt/ sheet D7AJMGB.009
Datum/
date 23.05.2002
Stand/
version 23.05.2002
Geprüft/
approved WAT/MZE
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
Änderungen vorbehalten! Subject to change without notice!
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 dou-
ble insulation
• the use and laying of cables is governed
by the EMC
The braking switch contact opens the lift
installation’s remotely controlled safety
circuit.
3.3.1 EBRA20 connection cable
Refer to chapter 4 Adjustment task
(1) Connect the cables (A) in the controller cabi-
net to over speed governor (OSG). Make the
connections of power supply for the EBRA20
magnet through the travelling cable (D) and
230V power supply for the board (E).
If the car light supply is used the wires
should be marked to have electricity when
the main supply of the lift is switched OFF.
3.2 Preparations and installations in the machine room
3.3 Electrical installation of the braking system