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1. completion the operation, remove all traces
of grease dust with cloth soaked suitable solvent.
The connections must not exert any strain the terminals any direction.
The terminal box immediately accessible when the compartment door open. 19
Model 3447
A pparatus Emax DC
S cale
D 1SDH000635R0002
Page No.
The terminals are marked with alphanumerical identification codes for the electrical circuit diagram.
The terminal box identified code the electrical circuit diagram.1 Interfacing elements for fixed circuit-breakers
A special terminal box provided, fitted with screw terminals for connecting the auxiliary circuits.
After the assembly, tighten the bolt with torque Nm.
5.
Always use two wrenches (so not strain the insulating parts excessively), applying the tightening torque indicated Fig.
Always insert large-diameter flat washer and spring washer between them (to spread the tightening pressure over greater area).3. Check tightness
after hours.2 Assembly procedure for the connection busbars
M12 high strength screws
Tightening torque the main terminals: Nm
No. When copper connections are used, advisable tin-plate the contact surfaces.
11/108
.Check the state the contact surfaces the connections very carefully: they must very clean with burrs, dents traces rust which must
be eliminated using fine file emery cloth prevent localized increases temperature. conductor with cross-section conforming current standards must used
for the connection.3 iring circu it-b xilia circu its
5.
Make the contact between connection and terminal and tighten the fixing screws completely.
5. scre s
fo l
E2 2
E4 4
No.
Before assembling the connection, clean and degrease the area around the screw.
Each terminal complete with bolt for fixing the connection. s
fo l
E3 3
E6 6
Fig. 18.
Fig.2 arthing
The fixed circuit-breaker and the fixed part the withdrawable circuit-breaker have one two terminals the rear, marked with the special
symbol, for connection earth (Fig. and Fig.
When aluminium connections are used, advisable apply thin layer Vaseline over the contact surfaces. 12). 18
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