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38 Electrical installation
Measuring the insulation
￭
Measuring the insulation of the drive
WARNING!
Do not do any voltage withstand or insulation resistance tests on any part of the
drive as testing can damage the drive. Every drive has been tested for insulation
between the main circuit and the chassis at the factory. Also, there are
voltage-limiting circuits inside the drive which cut down the testing voltage
automatically.
￭
Measuring the insulation of the input power cable
Before you connect the input power cable to the drive, measure its insulation according to
local regulations.
Connecting the input power cables
￭
Connection diagram – 6-pulse supply unit
This is a connection diagram for the 6-pulse supply unit. See also the delivery specific circuit
diagrams.
1
1
Fuses or other protection means for the short-circuit protection of the cable.
2
Grounding of the cable shield at the cable entry (360 degrees grounding).
Additional information:
• See the technical data for the dimensions of the cable entries, and the dimensions and tightening torques
of the terminals.
• Use a separate PE conductor in addition if the conductivity of the shields does not meet the requirement for
the PE conductor.
• See ACS880 multidrive cabinets and modules electrical planning instructions [3AUA0000102324 (English)]
for the cable selection instructions.
￭
Connection diagram – 12-pulse supply unit (option +A004)
This is a connection diagram for the 12-pulse supply unit (option +A004). See also the
delivery specific circuit diagrams.
L1
L2
L3
PE
2
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