Electrically connecting the unit

  1. Switch off power supply circuits, position a visible sign warning against being accidentally switched back on.
  2. Open terminal box, route cables into terminal box and screw down with cable feedthrough. Cable screw connections according to standard EN 60079-1 (Ex “d”) must be used.

 

Motor

Cable entry, thread

Terminals

n

ISO

NPT

3-phase

Mains connection

56 – 71

1

M20x1.5

½"-NPT

M4

1-phase

Secondary connection

56 - 71

1

M20x1.5

½"-NPT

M4

The table below shows the torques for the cable entries:

Metric

NPT

Permissible cable width range [mm]

Nm

M12x1.5

 

2 - 5

7.5

M12x1.5

 

3 - 6.5

7.5

M16x1.5

NPT 3/8"

3 – 7

9

M16x1.5

NPT 3/8"

5 – 10

9

M20x1.5

NPT 1/2"

10 – 14

10

M20x1.5

NPT 1/2"

7 – 12

10

M25x1.5

NPT 3/4"

9 – 16

12

M25x1.5

NPT 3/4"

13 – 18

12

M32x1.5

NPT 1"

14 - 20

15

M32x1.5

NPT 1"

18 – 25

15

M40x1.5

NPT 1 1/2"

20 - 26

24

M40x1.5

NPT 1 1/4"

20 – 26

24

M40x1.5

NPT 1 1/2"

22 – 32

24

M40x1.5

NPT 1 1/4"

22 – 32

24

Circuit diagram 3-phase with PTC thermistor triggering system
Circuit diagram 3-phase with PTC thermistor triggering system
  1. Wire the unit electrically, install the PTC thermistor triggering system according to the relevant circuit diagram Circuit diagram. Every unused core line, in multi-core cables, must either be connected to earth at the end in potentially explosive atmospheres or be adequately insulated by terminals suitable for the type of ignition protection. Insulation with insulating tape alone is not permitted (EN 60079-14).
    Fit terminal box cover for explosion protection. Ensure that there are no dirt particles in the terminal box and that the seal of the terminal box cover has close contact all the way around the terminal box. Please refer to the following table for tightening torques.

Thread

M4

M5

M6

M8

M10

Tightening torque [Nm]

2

3.2

5

12

18

  1. If necessary, fit an on/off switch (provided by the customer).