19
Keys (on request)
6 Apparatus racking-in lock
7 Earthing switch closing lock
8 Earthing switch opening lock
9 Insertion of the apparatus raking-in/out crank lever
10 Insertion of the earthing switch operating lever
Can only be removed with the truck in the racked-out position
Can only be removed with the earthing switch open
Can only be removed with the earthing closed
Can always be removed
Can always be removed
Accessory devices
18 Shutters fail-safe
19 Apparatus-switchgear unit compatibility matrix
20 Circuit-breaker mechanical operating mechanism
The device locks the shutters in the closed position when the apparatus is
removed from the compartment. The operator cannot open the shutters
manually. The shutters can only be operated by the apparatus truck or the
service trucks.
The apparatus multi-contact plug and relative switchgear unit socket are
equipped with a mechanical matrix, that
disables apparatus racking-in into
a switchgear unit with an inappropriate rated current.
The apparatus compartment is equipped with a mechanical device, that
enables circuit-breaker closing and/or opening directly by means of the
front operating mechanism Push Buttons, keeping the door closed. The
controls can be operated with the circuit-breakers in the operation and
racked-out position.
Locking magnets (on request)
16 Apparatus racking-in/out
17 Earthing switch ON/OFF
Magnet energized
Magnet energized
ypes of interlocks
Standard safety interlocks (mandatory)
Type Description
1
A Apparatus racking-in/out
B Apparatus closing
2
A Apparatus racking-in
B Apparatus multi-contact plug unplugging
3
A Earthing switch closing
B Apparatus racking-in
4
A Apparatus compartment door opening
B Apparatus racking-in
5
A Feeder compartment door opening
B Earthing switch opening
Condition to be fulfilled
Apparatus in OFF position
Defined truck position
Apparatus multi-contact plug plugged
Truck in tes
t position
Truck in test position
Earthing switch in OFF position, Earthing sw.
Operating handle cover in closed position.
Truck in test position
Apparatus compartment door closed
Earthing switch in ON position
Cable compartment door closed
Note: Apparatus is circuit-breakers.
Padlocks
11 Apparatus compartment door opening
12 Cable compartment door opening
13 Insertion of the apparatus raking-in/out crank lever
14 Insertion of the earthing switch operating lever
15 Shutters opening or closing
It is necessary to use padlocks with 5-8 mm hasp diameter
4.4 Control wiring plug connector coding
The connection between low voltage
compartment and circuit breaker is established
by a multi-pin control plug and socket. It is
recommended to ensure connecting the
secondary plug and socket before rack-in of the
circuit breaker from test to service position.
The control wiring plug and socket are also coded
to prevent any erroneous connection between
incompatible withdrawable part and the
switchgear, though their dimensions appear
similar.
Thanks to the coding fitted in the control wiring
plug and socket!
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