26
Standard safety interlocks (mandatory)
Type Description Condition to be met
1
A Apparatus racking-in/out Apparatus in OFF position
B Apparatus closing Defined truck position
2
A Apparatus racking-in Apparatus multi-contact plug plugged
B Apparatus multi-contact plug unplugging Truck in test position
3
A Earthing switch closing Truck in test position
B Apparatus racking-in Earthing switch in OFF position
4
A Apparatus compartment door opening Truck in test position
B Apparatus racking-in Apparatus compartment door closed
5
A Cable compartment door opening Earthing switch in ON position
B Earthing switch opening Cable compartment door closed
Note: Apparatus are circuit-breakers and contactors
Keys (on request)
6 Apparatus racking-in lock Can only be removed with the truck in the racked-out position
7 Earthing switch closing lock Can only be removed with the earthing switch open
8 Earthing switch opening lock Can only be removed with the earthing switch closed
9
Insertion of the apparatus raking-in/out crank
lever
Can always be removed
10 Insertion of the earthing switch operating lever Can always be removed
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
Locking magnets (on request)
16 Apparatus racking-in/out Magnet energized
17 Earthing switch ON/OFF Magnet energized
Accessory devices
18 Shutters fail-safe
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.
19 Apparatus-switchgear unit compatibility matrix
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.
20
Circuit-breaker mechanical operating
mechanism
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
pushbuttons, keeping the door closed. The controls can be
operated with the circuit-breakers in the operation and racked-
out position.
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4. Panel design and equipment
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