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3 Fasten the bolts with screwdriver or spanner. For the M12x45 bolts, the fastening torque
is 60~70N.m.
• Incorrect connection sequence may cause fire. Pay maximum attention to
the connection sequence.
• Ensure the firmness of the cable connection. Poor connection or oxidation
of the surface may cause over-heating or fire.
• Long bolts may affect the insulation and may cause short circuit.
• Remove the heat-shrink tubing between the cable lug and the copper bar if
necessary. Poor contact or over-heating may follow if otherwise.
step 7 Confirm that all cable connections are secure.
step 8 Install the cable fixings.
- - End
Subsequent processing
Using fireproof materials to seal the bottom cable entry hole, remove the debris inside the
cabinet, and restore the cabinet cover.
6.4.3 MV Side Connection
6.4.3.1 Inspection Before Wiring
• Check and ensure that the MV side of the inverter unit is disconnected
• Refer to the transformer manual and use the special lever to disconnect the load switch
of the transformer
• Check and ensure that the sleeves in the wiring area in the HV compartment are free
from damage, deformation, and fracture.
6.4.3.2 Procedure
step 1 Drill holes on the bottom sealing plate of the HV cabinet according to local standards and
regulations.
step 2 Lead external cables inside through the bottom cable entries.
Each of the three-phase (phase H1, phase H2, and phase H3) cables is led inside through
the same cable entry.
6 Electrical Installation System Manual
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