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the persists E
• inserted the ism sert and turn the key
•
C ircuit-breake interm ediate position betw connected
and disconnected plete the ope ratio n
• ndervoltage release not energized eck the corre pow circuit
• unt ning release rem ains energized the pow circuit
• cking-in ope tio not carried corre ctly paragraph 7.3
Model 3447
A pparatus Emax DC
S cale
D oc-N 1SDH000635R0002
Page No.
22/108
.Measures taken for any operating anomalies
P ressing i-Test tto 122/P 123 not circ it-b g
Anomalies
T ALARM led 122/PR 123 release lig up
Release ils rru out, rru ted
The release clo sin release not ize fficie tly
The release clo sin release rem ains ize d
The oving part rack into fixe part
The oving part not rack fixe part
The circu it-b not close
The circu it-b not n
Possible causes Checks and remedies
•
•
C cto inserted corre ctly
C oil fth ning release YO1 interrupted
C eck and insert cto correctly
Replace the YO1 shunt opening release
•
D fect the electronic circuits the icroprocessor
release
Put the circu it-b service and release
w ith the test apparatus
The ssib cause trip are listed part the
m anual relating the releases
Take ction cco the cause: particular, ear
is higher than 80% ARNING led lit up), circuit-breaker can
rem ain service, but repla cem circu it-b kin parts
m ust sch ith tim reaches
100%, the circuit-breaker ust put out service ediately.
A pro for circuit-
breaking parts
•
P ctio reset Press the echanical pushbutton for signalling protection tripping
•
O perating echanism consent contacts blocked closing
position
C state cts series ith release circu it
• •
A uxiliary circu pow voltag low easure voltag ust less 85% the rated
voltage
• •
D ifferent pow supp voltag fro the one indicated the
rating plate the releases
C the rating plate lta releases
• •
O perating circu faulty heck connections, fuses, interlocks, protection circuit-breakers
and contacts
• ire tightening screw loose tightness fth screw conn ctin the ires
• rre electrical ctio pow circu ctio ith the rre circu diagram
• elease coils interrupted eplace the coils
•
• perating ism blocked perate hand
