Page 149 - Sace Emax 2 Catalogue

INSTALL ATION 7/15

• Anchorage plates switchgear. To minimize this, fastening plates
The electrodynamic force released during a must be positioned near the circuit breaker ter-
short-circuit can cause high levels of mechanical minals.
stress on the devices and structures of the

500/ E1.2 E2.2 E4.2 E6.2
L [mm]: Max distance of the first anchorage plate from the circuit breaker terminals 15.75
19.69
450/
17.72
400/
350/
13.78
300/
11.81
250/
9.84
200/
7.87
150/
5.91
100/
3.94 40 60 80 100 120 140 160 180 200 220 240 260 280 300
Ipk [kA]: Peak current
In case of flat terminals, please refer to the Instruction Manual 1SDH001000R0809

• 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
Modifiable HR/VR rear 45 Nm 70 Nm
Spread rear 45 Nm 70 Nm 07
Front 45 Nm 70 Nm
Extended front 45 Nm 70 Nm
Spread front 70 Nm 70 Nm
Front for cables 43 Nm 70 Nm

• 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 separators are avail-
able as optional accessories.

Earthing connection • If the continuity of the circuit breaker frame
To achieve continuity and equal potential of with the switchboard earthing is guaranteed by
earthing between the Emax 2 circuitbreaker the metal contact (support) between the circuit
and the protection circuit of the switchboard, breaker and the metal structure of the switch-
customers can do either of the options below: board (which is a part of the protective circuit)
• Connect the Emax 2 fixed circuit breaker or the no connection is necessary (provided that no
fixed part of the withdrawable circuit breaker to panels of insulating material are interposed be-
the protective circuit by means of a cable with tween the circuit breaker and the metal frame
suitable crosssectional area to fulfil the require- of the switchboard).
ments of clause 10.5.2 of the Standard IEC Emax E1.2, fixed version, does not require any
61439-1. earthing connection.