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The versions available are:
a) Electrical signalling for circuit-breaker open/closed
It is possible to have electrical signalling of the circuit-breaker status (open/closed) 4, 10 or 15 auxiliary contacts.
The auxiliary contacts can have the following configurations:
- 4 + 2 break/make contacts for PR122 (2 normally open + 2 normally closed + 2 for the release)
- 10 + 2 break/make contacts for PR122 (5 normally open + 5 normally closed + 2 for the release)
- 15 supplementary break/make contacts which can be mounted outside the circuit-breake
The basic configuration described above can be modified by the user to indicate normally open or normally closed by repositioning
the faston connector on the microswitch. When 10 contacts for PR122/ VF are required, the PR120/K module is not available.
Reference Fig. in the electrical circuit diagrams: Q/1÷10 (21-22)
b) Electrical signalling for circuit-breaker connected/test isolated/disconnected
In addition to mechanical signalling of the position of the circuit-breaker, it is possible to have electrical signalling by means of 5 or
10 auxiliary contacts which are installed on the fixed part.
Only available for circuit-breakers in withdrawable versions for installing on the fixed part.
The auxiliary contacts can have the following configurations:
- 5 contacts; group consisting of 2 connected signalling contacts, 2 disconnected signalling contacts and 1 test position signalling
contact (main contacts isolated, but sliding contacts connected)
- 10 contacts; group consisting of 4 connected signalling contacts, 4 disconnected signalling contacts and 2 test position signalling
contacts (main contacts isolated, but sliding contacts connected)
Reference figure in the electrical circuit diagrams: S75I (31-32) - S75T (31-32) - S75E (31-32)
c) Contact for signalling closing springs loaded
This consists of a microswitch which allows remote signalling of the state of the circuit-breaker operating mechanism closing springs.
The contact is always supplied with the spring loading geared motor.
Reference figure in the electrical circuit diagrams: S33 M/2 - (11)
d) Contact for signalling undervoltage release energized (C.aux YU)
The undervoltage releases can be fitted with a contact (by choise, normally closed or open) for signalling undervoltage energized for
remote signalling of the state of the undervoltage release.
Reference figure in the electrical circuit diagrams: (12)
Mechanical operations counter
This is connected to the operating mechanism by means of a simple lever mechanism. It indicates the number of circuit-breaker
mechanical operations. The indication is visible on the front of the circuit-breaker from the outside.
10.2. Mechanical locks
a-b) Lock in open position
Different mechanisms are available which enable the circuit-breaker to be locked in the open position.
These devices can be controlled by:
- a key (a): a special circular lock with different keys (for a single circuit-breaker) or with the same keys (for several circuit-breakers).
In the latter case, up to four different key code numbers are available.
- padlocks (b): up to 3 padlocks (not supplied): Ø 4 mm..
c) Circuit-breaker lock in connected - test isolated - disconnected position
This device can be controlled by a special circular lock with different keys (for a single circuit-breaker) or with the same keys (for
several circuit-breakers available up to four different key code numbers) and by padlocks (up to 3 padlocks, not supplied - Ø 4 mm).
Only available for circuit-breakers in withdrawable versions for installing on the moving part.
d) Accessories for lock in test isolated - disconnected position
In addition to the circuit-breaker lock in the connected - test isolated - disconnected position, this allows locking only in the discon-
nected or test isolated positions. Only available for circuit-breakers in withdrawable versions for installing on the moving part.
e) Accessories for shutter padlocks
They enable the shutters to be padlocked (installed on the fixed part) in the closed position.
Only available for circuit-breakers in withdrawable versions for installing on the fixed part.
f) Mechanical lock on compartment door
This prevents the compartment door from being opened when the circuit-breaker is closed (and connected in the case of withdraw-
able circuit-breakers) and prevents circuit-breaker closing with the compartment door open.
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 a special tool.
b) IP54 door protection
This is provided by means of a transparent plastic escutcheon plate which fully protects the front of the circuit-breaker and ensures
a degree of protection to IP54. Mounted on hinges, it is fitted with a key lock.
Interlock between circuit-breakers
This mechanism makes the mechanical interlock between two or three circuit-breakers (even of different sizes and in any fixed/with-
drawable version) by means of a flexible cable. The electrical circuit diagram for the electrical changeover by means of a relay (to be
provided by the customer) is supplied with the mechanical interlock. The circuit-breakers can be installed vertically or horizontally.
4 types of interlocks are available:
type A: between 2 circuit-breakers (power supply + emergency)
B2342
Model
Apparatus
Emax VF
1SDH000909R0001
Doc. no.
Scale
Page No
30/66
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