Gearless Lift Machine
WSG-18 and WLG-18
Operating Instructions
7.1. General
The electrical connection may only be made
by a qualified electrician.
Before starting any work on the machines,
ensure that the lift machine or system is
properly isolated.
Before making any connections check that
•
the connecting cables are suitable for their specific
application and for the relevant voltages and currents.
•
the sufficiently dimensioned connecting cables and
torsion, strain and shear relief as well as anti-kink pro-
tection are provided
•
the protective conductor (Protection Class I only) is
connected to the earthing terminal
•
there are no foreign bodies, dirt or moisture in the ter-
minal boxes
•
cable entries not in use and the terminal box itself are
tightly sealed to prevent the ingress of dust or splash
water.
The insulation system of the motors is
designed such that they can be connected
to a converter with a maximum d.c. link
voltage U
link max
up to max. 700 Volt.
Note
: U
link max
is the maximum value of the
d.c. link voltage which is only transient and
approximately equivalent to the inception
voltage of the braking chopper or of the
energy recovery unit.
The maximum permissible rate of voltage
rise (dU/dt) at the motor terminals may be
max. 1.3 kV/
µ
s (in accordance with the
specifications of DIN VDE 0530 T1, Supple-
mentary Sheet 2). The overvoltage at the
motor terminals must not exceed 1.3 kV. It
may be necessary to use motor current fil-
ters or reactors to achieve these values.
7.2. Motor connection / Winding protection
The electrical connection of the motor and the winding
monitoring devices is made in the terminal box on top of
the machine.
The motor cable must be shielded. Ensure that the cable
shield contacts the frame over a large area at both ends.
The motor phases U1, V1 and W1 must be connected cor-
rectly to the corresponding phases of the converter; they
must not be interchanged.
The thermocouples installed in the winding
such as PTC thermistor detectors and ther-
mostatic switches must be evaluated in the
control system or frequency converter to
protect the motor from overtemperature.
The separately driven fan must be properly
connected and operated. It can be switched
in dependence of temperature by the ther-
mal switch S4, if required (relay must be
used).
Seite/page
10
Datum/date
14.02.2006
Stand/version
0.17
Änderungen vorbehalten!
Subject to changes without notice!
MADE BY
SAD GmbH
A MEMBER OF WITTUR
7. Electrical connection
Danger
Note
Cable cross-section required:
The currents specified under the machine
data for the series WLG-18 refer to duty
type S3-60%. This must be taken into
account when selecting the cable cross-
section required. The continuous Ir.m.s.
value required for the selected cable is
approximated from:
I
r.m.s. (cable)
≈≈
I
N (motor, S3-60%)
/ 1.28
The following table gives the recommended values for
the current-carrying capacity of PVC cables at a maxi-
mum ambient temperature of 40 °C:
Note
Caution
Cable cross-
section
WSG-18
Permis. max. cur-
rent (r.m.s. value)
WLG-18
Permis. max. current
I
N
(S3 - 60%)
2,5 mm
2
22,6 A
29,2 A
4,0 mm
2
29,6 A
38,2 A
6,0 mm
2
38,3 A
49,4 A
10,0 mm
2
53,1 A
68,6 A
16,0 mm
2
71,3 A
92,0 A
25,0 mm
2
94,0 A
121,3 A
35,0 mm
2
117,4 A
151,9 A
50,0 mm
2
146,2 A
188,7 A
