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The following signals are available following tripping the overcurrent release:
a) echanical trip signalling for overcurrent releases
This enables visual signalling the operating mechanism pushing the trip pushbutton when the circuit-breaker has been opened following
tripping overcurrent release.
Reference figure the electrical circuit diagrams: S75I (31-32) S75T (31-32) S75E (31-32)
c llin rin loaded
This consists microswitch which allows remote signalling the state the circuit-breaker operating mechanism closing springs. The contact
is always supplied with the spring loading geared motor.
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. special version the auxiliary
contacts also available (gold plated contacts) for rated voltage under (digital signal). With this accessory, you can reset the mechanical indicator with electronic
relay using remote control and this enables the circuit-breaker reset.
Only available for circuit-breakers withdrawable versions for installing the fixed part. is
supplied request.
Power supply: 24-30 AC/DC
220-240 AC/DC__________
_____________________________________110-130 AC/DC__________
Reference figure the electrical circuit diagrams: S51 (14)
A ilia ts
Auxiliary contacts installed the circuit-breaker are available enable indication the circuit-breaker's status.
The basic configuration described above can modified the user indicate normally open normally closed repositioning the faston
connector the microswitch.
Un max max ç
125 0.
Reference figure the electrical circuit diagrams: UI/N
Model 2234 Apparatus Scale
L 2778
Doc-No- 1SDH000460R0002
Page No.
Reference figure the electrical circuit diagrams: (12)
T tio rs
a) Current sensor for the neutral conductor outside the circuit-breaker
The sensor allows neutral protection means connection the overcurrent release and available only for three-pole circuit-breakers. The circuit-breaker can only closed again putting the pushbutton back into its normal position included in
the standard configuration. the electrical circuit diagrams: /1^10 (21-22)
b) Electrical signalling for circuit-breaker connected/test isolated/disconnected
In addition mechanical signalling the position the circuit-breaker, possible have electrical signalling means auxiliary
contacts which are installed the fixed part.
Reference Fig.15 ms
The versions available are:
a) Electrical signalling for circuit-breaker open/closed
It possible have electrical signalling the circuit-breaker status (open/closed) auxiliary contacts. reset the circuit-breaker, necessary reset the mechanical indicator
pushbutton.
Reference figure the electrical circuit diagrams: S33 M/2 (11)
d) ontact for signalling undervoltage release energized (C.3 250 0.3
250 0.
Reference figure the electrical circuit diagrams: S51 (13).
c) Coil for resetting the echanical release trip indicator
This enables visual signalling the operating mechanism (mechanical) and remotely (electrically means changeover switch) the circuit-
breaker being opened following trip the overcurrent releases.
b) lectrical and echanical trip signalling for overcurrent releases
This enables visual signalling the operating mechanism (mechanical) and remotely (electrically means changeover switch) the circuit-
breaker being opened following trip the overcurrent releases.aux YU)
The undervoltage releases can fitted with contact (by choise, normally closed open) for signalling undervoltage energized for remote
signalling the state the undervoltage release.
Reference figure the electrical circuit diagrams: S51 (13). When contacts for PR122/ PR123 are required, zone selectivity and the PR120/K module are not available.
The auxiliary contacts can have the following configurations:
- break/make contacts for PR121 normally open normally closed)
- break/make contacts for PR122/ PR123 normally open normally closed for the release)
- break/make contacts for PR121 normally open normally closed);
- break/make contacts for PR122/ PR123 normally open normally closed for the release)
- supplementary break/make contacts which can mounted outside the circuit-breaker.
The auxiliary contacts can have the following configurations:
- contacts; group consisting connected signalling contacts, disconnected signalling contacts and test position signalling contact (main
contacts isolated, but sliding contacts connected)
- contacts; group consisting connected signalling contacts, disconnected signalling contacts and test position signalling contacts (main
contacts isolated, but sliding contacts connected)
