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Then mount the pulley or coupling on the shaft end: make sure to screw a nut with a washer having at least the
same diameter of the pulley hub or coupling on the threaded bolt.
Use the utmost care in mounting dynamically balanced pulleys or couplings on the shaft end. Machines to be con-
nected to the motor by means of couplings are to be aligned according to the specifications of the coupling's manu
facturer.
-
Use only flexible couplings!
Mains and other electrical connections
The motors work as per VDE 0530 with mains voltage oscillations of up to ±10 % or frequency oscillations of up to –
5 % to +3 %. The mains ratings must match the voltage and frequency data specified on the ratings plate.
Connect the motors according to the connection diagrams attached to the terminal box. Use only the supplied origi-
nal connection components.
Please note!
Carry out the motor, controller, overload protection and earthing connection operations in
compliance with local installation requirements.
Please note!
If the accidental starting of the system may expose the personnel to danger, do not use
any automatically restarting motor protective equipment.
Mains connection of explosion-protected motors
Besides any general installation regulations, follow carefully EN 60079-14 and EN 50281-1-2. Afterwards suitable
overload protection is to be provided either with a motor circuit breaker or similar protective devices. These may
include also PTC thermistors with tripping devices. These must be specified on the rating plate together with a trip-
ping time t
A
.
In addition, any "Special Requirements" specified in the test certificate are to be complied with. These are marked
with an "X" after the test certificate number on the rating plate.
Motors with direct line lead-in
The free end of the cable inserted in the motor must be connected according to the regulations in force concerning
the connection area. If the line lead-in used on the motor is provided with pull relief, the cable can be laid freely; oth-
erwise the cable must be secured with a pull relief device in the near vicinity.
The maximum operating temperature at the line lead-in must not
exceed 90° C.
Terminal box
Open the box by loosening the screws on the cover (Fig. 5) or, in the case of models with grub screw (Fig. 6), by
turning the grub screw counter-clockwise and then loosening the tapped cover.
Close the terminal box again after connecting the mains by following the same instructions in the opposite order.
In order to change the position of the cable and line lead-ins, you can turn the terminal box by 4
x
90°.
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Loosen either
– the four fastening screws or
– the anti-rotation pins by means of the grub screw.
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Turn the terminal box to the desired position.
