M&C TechGroup MP47-Z_Ex Operator's manual - Handbuch (Seite 93)

KNF Motor M 56 Ex Installation and connection
Translation of orignal Operating and Installation Instructions, english, KNF 121220-121648 01/13 13
Select the excessive current protection equipment such that
the motor is protected even when the rotor is blocked.
Î The motors may not be used at variable speed with a fre-
quency converter unless motor, converter, and monitoring de-
vice have been tested and approved together, are marked as
such, and the permissible operating conditions are listed in the
joined EC Type Examination Certificate.
1. Compare the supply data with the data on the motor-plate. For
operating current see type plate.
The voltage must not vary more than + 5 % and - 5 % from that
shown on the type-plate.
2. Open terminal box cover (see Fig. 1/2, page 10 and Fig. 2/2,
page 10).
3. Connect the mains cables to the connections.
The terminal-block connections are to be made as shown in
fig. 3 (single-phase capacitor motor) and figs. 4 and 5 (3-phase
motor).
For connection to the mains supply, the terminal box contains
a terminal board and a screwed cable gland with a M 16 x 1.5
thread (Fig. 1/3, page 10, and Fig. 2/3, page 10). The clamping
range of this screwed cable gland is between 5 and 10 mm.
The maximum conductor cross-section that can be connected
to the connector is 2.5 mm
2 .
At least 7 mm of the insulation must be stripped off each
individual cable strand.
Connect the leads to the anti-twist slotted terminals (max. 2.5
mm
2 ) as shown in fig. 6, or with prefabricated cable lugs (max.
2.5 mm 2 ). If you use cable lugs, within the potentially explosive
atmosphere only crimping may be used to connect the lead.
Soldering is permitted only if the connection is made away
from the potentially explosive atmosphere.
Observe creep and air gaps as per EN 60079-0/60079-7.
Tighten the screws of the connectors with a torque of 3 Nm.
They must not be able to work loose by themselves.
Take care to make the proper connections in the terminal box.
4. Connect the earth (ground) wire to the motor.
For connecting the protective ground lead, a screw (4 mm 2 )
with an anti-twist terminal clip is located in the terminal box (fig.
7). The VDE grounding symbol indicates this screw.
Before connecting, the protective ground lead must be stripped
off about 20 mm.
An additional grounding screw of the same kind is located at
the bottom of the housing.
Connecting motor
Fig. 3: Circuit diagram single-
phase capacitor motor
Fig. 4: Circuit diagram 3-phase
motor (Y connection)
Fig. 5: Circuit diagram 3-phase
motor (∆ connection)