WEG W22 Premium E3 Manual De Instalación, Operación Y Mantenimiento página 98

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When connectors are used, all wires of the stranded cable must be properly inserted and fixed inside
the connector.
If motors are supplied without terminal blocks, insulate the cable terminals with suitable insulation material that
meets the power supply voltage and the insulation class indicated on the motor nameplate. The connection
must be made outside the hazardous area or protected by a standardized type of protection.
Ensure correct tightening torque for the power cable and grounding connections as specified in Table 8-8.
The clearance distance (see Figure 6.13) between non-insulated live parts with each other and between
grounded parts must be as indicated in Table 6.3.
Clearance distance
Clearance distance
Voltage
U ≤ 440 V
440 < U ≤ 690 V
690 < U ≤ 1000 V
1000 < U ≤ 6900 V
6900 < U ≤ 11000 V
11000<U ≤ 16500 V
Even when the motor is off, dangerous voltages may be present inside the terminal box used for the
space heater supply or winding energization when the winding is used as heating element.
Motor capacitors will hold a charge even after the power has been cut off. Do not touch the capacitors
and/or motor terminals, before discharging the capacitors completely.
After the motor connection has been completed, ensure that no tool or foreign body has been left inside
the terminal box.
98 Manual of Electric Motors
Figure 6.13 - Clearance distance representation
Table 6.3 - Minimum clearance distance (mm) x supply voltage.
Minimum clearance distance (mm) x type of protection
Clearance distance
Ex e
Ex de
6
10
14
60
100
-
Clearance distance
Ex n
Ex d
Ex t
4
5.5
8
45
70
105