KNF AC Motor M 43 Ex
Installation and connection
Translation of original Operating and Installation Instructions, english, KNF 121218-121646 01/13
11
dependent delayed protection switch with current-dependent
all-pole triggering as per EN 60947 or through use of an equiv-
alent device. The following notes apply:
The protection device must be set for the rated motor current
(see output plate). It must be selected such that the motor is
thermally protected even when the rotor is blocked.
Î
The installation, or additional measures, must protect the motor
against water as well as against electrical, chemical, thermal,
or mechanical effects, so that in operation the protection
against explosion remains effective.
Î
When selecting cables and wiring, the general requirements for
use in potentially explosive atmosphere must be met (see EN
60079 or DIN VDE 01 65). In particular, cables and wiring must
be chosen to withstand the expected mechanical, chemical,
and thermal conditions.
Î
When routing cables and wiring, and making connections, the
necessary conditions and safety measures must be observed
(see EN 60079 or DIN VDE 0165).
Î
The cable fittings must be tested for potentially explosive
atmosphere and approved with an EC-Type Examination Cer-
tificate.
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 + 10 % and - 10 % from
that shown on the type-plate.
2. Open terminal box cover (see Fig. 1/
2
, page 9).
3. Connect the mains cables to the connections (see fig. 2 and
the following references).
For connection to the mains supply, the terminal box contains
a connector and two screwed cable glands with a M 16 x 1.5
thread (Fig. 1/
3
, S.
9). The clamping range of these screwed
cable glands 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 6 mm of the insulation must be stripped off each
individual cable strand.
Observe creep and air gaps as per EN60079-0.
Take care to make the proper connections in the terminal box.
After inserting the cable into the terminal box, tighten the
clamping screw (compression screw) on the cable gland with a
torque of 2.5 Nm.
Connecting motor
black
black
red
red
Capacitor
Fig. 2: Electrical connection
