Description; Functional Description - Tractel tirak MWX 500-1537 Série Manuel D'installation

Operating equipment
It must be possible to position the operating equipment in such a
way that safe operation is always possible regardless of the
movements of the hoist.
The control buttons must be arranged so that there is no possibil-
ity of confusion.
On a button panel the UP button should be the closest button to
the cable outlet.
Nameplate and warning signs / application
restrictions
Replace missing or illegible nameplates and warning signs im-
mediately.
See Fig. 7.
Item Name
1 Warning sign 'Wire rope diameter'
2 Electric motor nameplate
3 Brake nameplate
4 Emergency descent warning sign
5 tirak™ nameplate
6 Rope identification
The necessary information can be obtained from the nameplate.
Directives and standards
Applicable directives and standards: See '9.1 Directives and
standards' on page 11.
Product versions covered in the manual
The product versions described in this manual are listed in
Table 1 on page II.
Running hours counter
The running hours counter is located in the hoist's terminal box.
The running hours counter counts the time in which the hoist is in
operation as running hours (UPWARD and DOWNWARD
movements). To read the running hours counter: See
'15.3 Reading the running hours counter' on page 22.
G961.1 - 03/2012
4

Description

4.1

Functional description

The tirak is a hoist for raising and lowering loads. The hoist is
TM
operated with an electric motor. The X-model series hoists can
raise and lower as well as pull and release in the pulling direction
of the rope. The hoists are equipped with a free reeler or a driven
reeler for storing the rope.
The free reeler is driven by the rope and the hoist's momentum.
The rope is stored automatically in the free reeler.
Driven reelers are driven by the hoist's drive shaft via a sliding
clutch. The rope is wound on using a preset force.
Optional: The rope is fed onto the driven reeler through a rope
guide. When the wire rope is being unwound the hoist pulls it off
of the rope reel against the force of the sliding clutch.
The lifting path or stroke is limited by the length of rope that can
be stored on the free reeler or the driven reeler. The rope length
chosen must be such that in driven reelers the last turn of the
rope always remains on the rope reel.
It is operated via a button panel, control box, a central control
unit or a remote control with a frequency converter.
The electromagnetic spring-applied brake automatically locks
when the operating control for travelling UP or DOWN is released
or when the power fails. When lowering the load by manually
venting the spring-applied brake a centrifugal brake prevents the
rope from accelerating up to a fast speed.
The optional secondary brake BSO is mounted in or in front of
the support frame, serves as a speed limiting device and pre-
vents the load from falling in the event of broken gears, for ex-
ample. If the secondary brake is triggered the hoist is switched
off and the suspension rope caught.
The hoist's payload can be multiplied according to the block and
tackle principle by reeving the rope. See '4.9 Load limits' on
Page 10.
Press the EMERGENCY-STOP button to stop the hoist immedi-
ately in an emergency situation.
Hoists with a load bearing capacity of 1,000 kg or greater are
equipped with a mechanical load limiting device. Hoists with a
load bearing capacity up to 1,000 kg can be optionally equipped
with an electrical or a mechanical load limiting device.
The load limiting device will activate automatically when the
overload setting is reached. The upward travel of the hoist is
stopped. The maximum overload that has to be set up can be
found in the applicable directives and standards (See
'9.1 Directives and standards' on Page 11).
The system manufacturer / operator is responsible for determi-
ning and setting up the application dependent maximum overload.
For further information see '15.5 Adjustment, Adjusting the load
limiting device' on Page 23.
Installation and operating manual
EN-7