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2.3 To check the insulation resistance
When
resistance and immediately afterwards
the
dangerous voltages and must not be touched.
Before commissioning the motor, after it has been in storage or has
not been used for a lengthy period of time (longer than six months)
the insulation resistance of the coil must be measured. Check the coil
using an insulation resistance measuring instrument (max. direct
voltage 500 V) against the earth.
If the minimum insulation resistance at a coil temperature of 25 C is
less than 30 M or less than 1 M at a coil temperature of 75 C, the
motor coil must be dried until the required minimum insulation
resistance has been achieved.
The coil temperature must not be allowed to exceed 80 C. To ensure
that air exchange takes place in enclosed motors, loosen the bearing
plate. If you wish to dry the coil by connecting it to low voltage, seek
assistance from the supplier.
After drying the coil the bearings must be serviced (see relevant
section).
3
Installation and commissioning
Before completing any work on the
motor the voltage supply must be
disconnected.
3.1 Installation
3.1.1 Site
The motors should be installed where they allow easy access, at
ambient and coolant temperatures of max. -15 °C to +40 C (IEC
60034-30). Altitude of site max. 1000 m (above sea level).
The cooling air must be able to flow to and from the motor without
hindrance and must not be drawn in again immediately after being
fed out of the motor. The air intake and outfeed apertures and the
ducts between the cooling ribs are to be kept free of dirt.
If the motor is installed with its shaft ends pointing upwards and
downwards, it must be ensured that no water can ingress into the top
bearing.
3.2 Securing the motors
Motors with feet must be installed and secured on a flat, shockfree
surface. All the securing feet must lie flat on the surface; if necessary
place thin sheets of metal beneath the feet to compensate for
unevenness.
For flange motors attention must be given to ensuring that the
counter flange runs evenly. Even running errors may cause bearing
damage or the failure of sealing systems.
3.3 Condensation drain holes
It must be ensured that the existing condensation drain holes are at
the lowest point of the motor when it has been installed and are kept
free of dirt.
Sealed condensation drain holes are to be opened from time to time
and then sealed again.
3.4 Balancing
If a motor is commissioned without a
drive element, the fitted spring is to be
secured to prevent it being thrown out.
Take the appropriate action to prevent contact with rotating
parts.
The motors are marked on the shaft end face with the kind of balance
corresponding to DIN ISO 8821:
Balancing with a half featherkey „H"
Balancing with a full featherkey „F"
If the drive element is connected, consideration must be given to the
relevant balancing type.
measuring
the
insulation
terminals
may
be
carrying
English
3.5 Electrical connection
The electrical connection may only be performed by a specialist in
accordance with current safety regulations.
The mains voltage and frequency must comply with the data on the
rating plate. Tolerances of 5% for the voltage and/or 2% for the
frequency are permissible.
Operating the motor with a frequencyinverter, an EMC-compliant
connection in accordance with Directive 89/336 EEC is carried out.
A connection diagram, Figure 3, is supplied with every motor. The
connection of the motor and the controller, overload guard and earth
are to comply with the VDE and installation regulations as well the
country-specific, national and international regulations of the
electricity supply companies.
The direction of rotation from the shaft has to be checked befor
starting. The reversal of the direction of rotation is possible by
swapping any two mains wires.
The infeed parts used as a pull-relief and torsion guard for the supply
cables are to be used properly. Any infeed apertures which are not
required are to be sealed.
The tightening torques for screw connections on the terminal board
connectors are shown in Figure 2.
3.6 Motor protection
Connect the integral neutral conductors to the trip unit as shown on
the connection diagram in the connection box cover or supplied with
the motor. Any puncture tests which are necessary should only be
completed using a measurement bridge (max. 2.5 V).
If a temperature monitor is fitted as an opener to protect the motor, it
is to be connected in series as shown on the connection diagram to
the auxiliary power circuit (min. 25 V ..... max. 250 V 1,6 A).
In order to prevent an independent restart of the motor after it has
been cooled down and the downshift of the embedded sensors,
appropriate actions are taken.
3.7 Commissioning
3.7.1 To install the transmission elements
Only use suitable tools and equipment to install and remove the
transmission element. No pressure or blows must be exerted on the
motor bearing.
3.7.2 Alignment for operation with a coupling
For operation with a coupling, the shafts are to be aligned axially and
radially against each other. The gap between the coupling halves is
to be adjusted as instructed by the coupling manufacturer.
Only use couplings which are elastic to central offset, angled,
longitudinal and rotary motion. Rigid couplings are not allowed and
may only be used in exceptional cases by agreement with the
manufacturer.
3.7.3 Before commissioning at least the following checks are to
be made:
-the rotor can be turned without catching,
-the motor has been aligned and installed properly,
-the output elements have correct settings,
-all the electrical connections, connection elements and securing
bolts have been properly tightened and made,
-any additional equipment is fully functional,
-the coolant supply is not defective,
-contact guards have been fitted for moving parts and live parts.
5
Caution - risk of burns.
Temperatures of over 80 C can be
generated on the surface of the motor.
If necessary fit a contact guard.
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