INSTALL AT ION
7/15
• Tightening torques The following table indicates the values required for connecting the circuit breaker terminal and the connecting bars.
Terminals
E1.2
E2.2 / E4.2 / E6.2 70 Nm / 619.55 lb-in
Adjustable HR/VR rear
40 Nm / 354.03 lb-in 40 Nm / 354.03 lb-in 40 Nm / 354.03 lb-in 40 Nm / 354.03 lb-in 70 Nm / 619.55 lb-in 43 Nm / 380.58 lb-in
Spread rear
–
Front
70 Nm / 619.55 lb-in
Extended front
– – –
Spread front
Front for cables
• Segregation plates and separator plates The rear part of the circuit breaker has been de- signed with specific slots in which insulating walls can be housed to facilitate segregation of live parts. In addition, phase barriers are available as an optional accessory for E1.2.
Earthing connection To achieve continuity and equal potential of earthing between the Emax 2 circuit breaker and the protec- tion circuit of the switchgear, customers can use ei- ther option below: • Connect the Emax 2 fixed circuit breaker or the cra- dle of the drawout circuit breaker to the protective circuit by means of a cable with suitable cross-sec- tional area to fulfil the switchgear requirements.
• If the continuity of the circuit breaker frame with the switchboard earthing is provided by the metal contact (support) between the circuit breaker and the metal structure of the switchboard (which is a part of the protective circuit) no connection is nec- essary (provided that no panels of insulating mate- rial are interposed between the circuit breaker and the metal frame of the switchboard). Emax E1.2, fixed version, does not require any earth- ing connection.
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