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The accessory connector can be fixed in an accessory terminal box.
Frame Size: 160 to 200
Frame Size: 225 to 355
As reported previously, connections must be made using clamping torques that matches screw size:
Screw Size
M4
M5
M6
M8
M10
M12
Clamping
Torque [N.m]
1.2
2
3
6
10
15.5
Minimum air distances, between conductors, specified by EN 60079-7 or IEC 60079-7 Standard:
Rated Voltage – U [V]
Minimum air - distance [mm]
176 < U < 220
4
220 < U < 275
5
275 < U < 440
6
440 < U < 550
8
550 < U < 693
10
693 < U < 880
12
880 < U < 1100
14
2.3.3 Protecting Devices
Thermal Protector Device:
The type of protector used is thermistors (PTC – positive temperature coefficient).
Thermistors are semi-conductor heat detectors which sharply change their resistance upon reading a pre-set
temperature.
They are fitted into the winding and linked by a bushing line M10 x 1.5 (0.5 mm² cable) with a connector inside
the terminal box.
Protection Device Diagram
Connector
Bushing line M10 x 1.5
Winding
PTC / Winding
Connection
2.4 CABLE INLETS
They must be designed according to Installation and Type of Protection Standards specified in 2.1.
When cable inlets are provided with cable gland, this must be suitable to the unit and to the cable type; the
8 | INDUCTION MOTORS FOR HAZARDOUS AREAS
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