ABB Sace Emax 2 Installation, Operation And Maintenance Instructions page 30

Emax e1.2 low voltage air circuit-breakers

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ABB | SACE Emax 2

Grounding The fixed part of withdrawable circuit-breakers has a screw for the earth connection.

The connection must be implemented by means of a conductor of suitable cross-section according to the

IEC 61439-1 Standard.

Clean and degrease the area around the screw before making the connection.

After assembly of the conductor, tighten the screw with a torque of 2 N m - 17.7 lb in.

Alternatively, no connection will be required if circuit-breaker frame continuity with the switchgear

earthing is provided by the metal contact (support) between the circuit-breaker and the metal structure

of the switchgear (or a part of the protection circuit) (as long as there are no insulating panels between

the circuit-breaker and the metal frame of the switchgear).

The fixed circuit-breaker version does not need an earth connection.

Figure 67

Management operations

5 - Installation

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