Seepex BN 5-12 Series, Operation & Maintenance Manual

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Manual of Electric Motors 87
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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.
Table 6.3 - Minimum clearance distance (mm) x supply voltage
Voltage Minimum clearance distance (mm)
U ≤ 440 V 4
440 < U ≤ 690 V 5.5
690 < U ≤ 1000 V 8
1000 < U ≤ 6900 V 45
6900 < U ≤ 11000 V 70
11000 < U ≤ 16500 V 105
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.
Ensure correct tightening torque for the power cable and grounding connections as specified in Table 8.7
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
Clearance distance
Clearance distance
Figure 6.13 - Clearance distance representation
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