NETZSCH NM125BY B.1 Series - Electrical Connection; Terminal Box Cover Seals

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3 ATEX Explosion hazard areas

B 1091 en-3118 37

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3.3.2 Terminal box cover seals

The terminal box cover gasket is captively mounted on the terminal box cover. Please only use an

original seal when replacing the seal.

If the terminal box is opened during installation, maintenance, repair, troubleshooting or overhaul, the

terminal box cover must be re-fitted after the work is complete. There must be no dirt on the surface of

the seal or the sealing surface of the terminal box frame.

The screws for the terminal box cover must be tightened with a torque according to the list below.

Tightening torques for terminal box cover screws

Thread diameter M4 M5 M6 M8

Tightening torque (Nm) 0.8 - 1.2 1.2 - 1.8 1.5 - 2.5 3.0 – 5.0

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3.3.3 Electrical Connection

The electrical connections of the terminal board are protected against twisting. The voltage supply to

the terminal board must be made by means of suitable ring terminals. The ring terminals are installed

between the two brass washers below the lock washer. The nuts must be tightened with a torque

according to the table below. The contact pressure is permanently maintained by means of the specified

torque and the lock washer. In addition, twisting of the ring terminals of the voltage supply is prevented.

The connection elements are corrosion-proof.

Tightening torques for terminal board connections

Thread diameter M4 M5 M6 M8