L2234
L2778
Emax
8/158
Doc. No.
Model
Apparatus
Scale
Page No.
1SDH000460R0002
4.3 Installation of the fixed part of the withdrawable circuit-breaker
4.3.1
Preparation of the fixed part
Assembly of the anti-racking-in lock
Before installing the fixed part, it is necessary to check the presence of the anti-racking-in lock for circuit-breakers with different electrical
characteristics from those of the fixed part. If the anti-racking-in lock has been supplied separately, proceed to assemble it as follows:
– On the self-adhesive plate (4), find the assembly position of the stop bolts in relation to the circuit-breaker which has to be housed in the fixed
part.
– Insert the hexagonal-head screws (1) in the holes found in the previous item as shown in the figure.
– Fix the screws with the washers (2) and the hexagonal stops (3).
Make sure that the anti-racking-in lock corresponding to the one installed on the fixed part is present on the circuit-breaker (moving part).
– Anti-racking-in plate on the moving part (5).
Fig. 8
Table of the circuit-breaker weights (Kg.)
Notes
The weights indicated in the table are intended for circuit-breakers complete with PR121, PR122
or PR123 releases and relative current sensors, excluding the accessories.
The withdrawable version includes the moving part in the same conditions as above, and the
fixed part with horizontal rear terminals.
4.
Installation
4.1 Installation room
Install the circuit-breaker in a dry, dust-free, non-corrosive room, and
in such a way that it is not subject to shocks or vibrations. Where this
is not possible, install it inside a switchboard with a suitable degree of
protection.
For the preparation of the installation room, please refer to the "Overall
dimensions" paragraph, which gives information on the following points:
– minimum installation volumes of the circuit-breakers and derived
versions
– distances to be respected for circuit-breakers in compartments
– overall dimensions of the circuit-breakers
– fixing drillings
– compartment door drillings.
The installation, commissioning and any ordinary and extraordinary
maintenance have to be done by skilled personnel, with a detailed
knowledge of the apparatus.
4.2 Installation of the fixed circuit-breaker
Fix the circuit-breaker to a horizontal surface using the screws (M10 x
12 min.).
Fig. 7
With regard to lifting, follow the instructions: the circuit-breakers must be placed on a sturdy supporting surface and lifted, preferably, by means
of a special fork-lift truck. However, the use of ropes is allowed. In this case, the lifting ropes must be hooked up as shown in the figures (the lifting
plates are always supplied with the circuit-breaker).
Selective
Fixed version Withdrawable version
circuit-breaker
3 poles
4 poles
3 poles
4 poles
E1
45
54
70
82
E2
50
61
78
93
E3
66
80
104
125
E4
97
117
147
165
E4/f
120
170
E6
140
160
210
240
E6/f
165
250
Current-
Fixed version Withdrawable version
limiting
3 poles
4 poles
3 poles
4 poles
E2L
52
63
80
95
E3L
72
83
110
127
