Mechanical and electrical trip signalling for overcurrent releases
The following signals are available following tripping the overcurrent release:
a) Mechanical 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.3
250 0.
25/108
.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.
Model 3447
Apparatus Emax DC
Scale
D oc-N 1SDH000635R0002
Page No. special version the auxiliary
contacts also available (gold plated contacts) for rated voltage under (digital signal).
Reference figure the electrical circuit diagrams: S51 (13).
Only available for circuit-breakers withdrawable versions for installing the fixed part. With this accessory, you can reset the mechanical indicator with electronic
relay using remote control and this enables the circuit-breaker reset. The contact
is always supplied with the spring loading geared motor. 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.
The basic configuration described above can modified the user indicate normally open normally closed repositioning the faston
connector the microswitch.
b) Electrical and mechanical 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.
Reference figure the electrical circuit diagrams: S51 (13).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. indicates the number circuit-breaker mechanical
operations.
The auxiliary contacts can have the following configurations:
- break/make contacts for PR122/DC-PR123/DC normally open normally closed for therelease)
- break/make contacts for PR122/DC-PR123/DC normally open normally closed for the release)
- supplementary break/make contacts which can mounted outside the circuit-breaker.3 250 0.
Reference figure the electrical circuit diagrams: (12)
Mechanical operations counter
This connected the operating mechanism means simple lever mechanism. The circuit-breaker can only closed again putting the pushbutton back into its normal position included in
the standard configuration.
Reference Fig. When contacts for PR122/ PR123 are required, zone selectivity and the PR120/K module are not available.
Un max max cosq>
125 0.
Reference figure the electrical circuit diagrams: S33 M/2 (11)
d) Contact for signalling undervoltage release energized (C.
Reference figure the electrical circuit diagrams: S75I (31-32) S75T (31-32) S75E (31-32)
c) Contact for signalling closing springs loaded
This consists microswitch which allows remote signalling the state the circuit-breaker operating mechanism closing springs.
c) Coil for resetting the mechanical 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.
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). The indication visible the front the circuit-breaker from the outside.
Power supply: 24-30 AC/DC
220-240 AC/DC__________
_____________________________________110-130 AC/DC__________
Reference figure the electrical circuit diagrams: S51 (14)
Auxiliary contacts
Auxiliary contacts installed the circuit-breaker are available enable indication the circuit-breaker's status
