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3 installation of the frequency inverter – NORD Drivesystems BU0180 User Manual

Page 21

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2 Assembly and installation

BU 0180 GB-0914

Pre-series version

21

2.1.3

Installation of the frequency inverter

The housing cover must first be removed in order to make the electrical connections to the frequency
inverter. To do this, unscrew the 4 fastening screws, so that the housing cover can be removed upwards.

After the electrical connections of the supply cables have been made, the housing cover can be replaced.

To achieve the maximum protection class IP55/IP66, care must be taken that all the fastening screws of the
housing cover are tightened diagonally, step-by-step and with the torques stated in the table below.

For the cable gland of the connecting cable, appropriate screwed connections for cable cross-section must
be used.

Frequency inverter size

Screw size

Tightening torque

Size I

M5 x 25

3.5 Nm ± 20%

Size II

M5 x 25

3.5 Nm ± 20%