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- padlocks (b): padlocks (not supplied): mm.
These devices can controlled by:
- key (a): special circular lock with different keys (for single circuit-breaker) with the same keys (for several circuit-breakers). The mechanical interlocks between
two three circuit-breakers are made means cables that can used for circuit-breakers installed, either side-by-side one over the other. Only available for circuit-breakers withdrawable versions for installing the moving part. the latter
case, four different key code numbers are available.
Only available for circuit-breakers withdrawable versions for installing the moving part.
The change over from the normal supply the emergency supply, can done manually (with local remote control) automatically.
Model L3447
A pparatus Emax DC
S cale
D oc-N 1SDH000635R0002
Page No.
f) Mechanical lock compartment door
This prevents the compartment door from being opened when the circuit-breaker closed (and connected the case withdrawable circuit-
breakers) and prevents circuit-breaker closing with the compartment door open.
- supply essential parts the installation, other than the safety services.
4 types interlocks are available:
type between circuit-breakers (power supply emergency)
type between circuit-breakers power supplies emergency)
type between circuit-breakers power supplies bus-tie)
type between circuit-breakers power supplies single closed circuit-breaker)
The emergency power supply generally supplied order substitute the normal power supply two cases:
- supply safety services for people.
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Transparent protection covers
a) Protection covers for opening and closing pushbuttons
These protection covers, applied over the opening and closing pushbuttons, prevent the corresponding circuit-breaker operations except by
using special tool.2 echanical locks
a-b) Lock open position
Different mechanisms are available which enable the circuit-breaker locked the open position.
Only available for circuit-breakers withdrawable versions for installing the fixed part. For
the change over, the circuit-breakers must supplied with the necessary accessories for the electrical remote control and for electrical and
mechanical interlocks provided for the changing over.
e) Accessories for shutter padlocks
They enable the shutters padlocked (installed the fixed part) the closed position.
The accessories can for example:
- the shunt opening release
- the shunt closing release
- the motor operator
- the auxiliary contacts.
b) IP54 door protection
This provided means transparent plastic escutcheon plate which fully protects the front the circuit-breaker and ensures degree
of protection IP54.
c) Circuit-breaker lock connected test isolated disconnected position
This device can controlled special circular lock with different keys (for single circuit-breaker) with the same keys (for several circuit-
breakers available four different key code numbers) and padlocks (up padlocks, not supplied mm).
d Accessories for lock test isolated disconnected position
In addition the circuit-breaker lock the connected test isolated disconnected position, this allows locking only the disconnected test
isolated positions.
For the change over, the customer can use suitable electronic relay, whose diagram supplied ABB SACE. The electrical circuit diagram for the electrical changeover means relay (to provided the customer)
is supplied with the mechanical interlock.
Interlock between circuit-breakers
This mechanism makes the mechanical interlock between two three circuit-breakers (even different sizes and any fixed/withdrawable version)
by means flexible cable.1Q. The circuit-breakers can installed vertically horizontally. Mounted hinges, fitted with key lock
