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f) echanical lock com partm ent 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.
The accessory for installation the busbars and available different sizes: 3200A for three- and four-pole circuit-breakers, 4000A
for three-pole circuit-breakers.
Model 2234 Apparatus Scale
L 2778
Doc-Na 1SDH000460R0002
Page No. the latter
case, four different key code numbers are available. Only available for circuit-breakers withdrawable versions for installing the moving part.
T tio rs
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. The indication visible the front the circuit-breaker from the outside. The electrical circuit diagram for the electrical changeover means relay (to provided the customer)
is supplied with the mechanical interlock.
The accessories can for example:
- the shunt opening release
- the shunt closing release
- the motor operator
- the auxiliary contacts.
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. The accessory fitted with dip-switch multiple selector which reset according the required sensitivity (3A 30A). Mounted hinges, fitted with key lock.
- supply essential parts the installation, other than the safety services.
d cce sso rie iso isco cte sitio n
In addition the circuit-breaker lock the connected test isolated disconnected position, this allows locking only the disconnected test
isolated positions.rth (sta tra sfo r)
PR122 and PR123 microprocessor-based electronic releases may used combination with external toroid located the conductor, which
connects the star center the MV/LV transformer (homopolar transformer) earth: this case, the earth protection defined Source Ground
Return. 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.
c) ircuit-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).
The the toroid can regulated 100 250 400 800 using different combinations the connections.
d ica tio r
This connected the operating mechanism means simple lever mechanism.
- padlocks (b): padlocks (not supplied): mm.
c) Hom opolar for residual current protection
The toroid enables the residual current protection activated and can combined with the PR122/P LSIRc, PR122/P LSIG releases (with
PR120/V) and PR123/P.
Only available for circuit-breakers withdrawable versions for installing the moving part.
10.
in rlo irc it-b rs
This mechanism makes the mechanical interlock between two three circuit-breakers (even different sizes and any fixed/withdrawable version)
by means flexible cable.
e) ccessories for shutter padlocks
They enable the shutters padlocked (installed the fixed part) the closed position.
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 circuit-breakers can installed vertically horizontally.
The change over from the normal supply the emergency supply, can done manually (with local remote control) automatically. indicates the number circuit-breaker mechanical
operations.
27/158
.
Reference figure the electrical circuit diagrams: UI/0.
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.
Only available for circuit-breakers withdrawable versions for installing the fixed part.2 ica s
a-b) Lock open position
Different mechanisms are available which enable the circuit-breaker locked the open position
