Page 363 - SACE Tmax XT - Technical Catalogue

WIRING DIAGR AMS 3/33

03
Instructions for resetting the circuit-breaker af- 2. Electrical resetting under the operator's
ter tripping responsibility
To be wired (by the customer): contact SO1,
Selection of the type of circuit-breaker resetting SO2, contact SY/1 and the auxiliary relay KO
depends on design requirements and on service (only for MOD).
conditions. Opening of the circuit-breaker is allowed by
Resetting can take place following tripping of the means of the contact S02. Such contact shall be
following releases: protected to avoid unwanted activation and can
• overcurrent; be used only if the information received by the
• undervoltage; operator make it possible to exclude tripping
• shunt opening. due to a short-circuit, or if the causes of the
short-circuit have been removed.
The following three possibilities are suggested 3. Electrical resetting always allowed
(see diagrams in the following page): To be wired (by the customer): contact SO1,
1. Only manual resetting SO2, contact SY/1 and the auxiliary relay KO
To be wired (by the customer): contact SO1, (only for MOD).
contact SY/1 and the auxiliary relay KO (only for Opening is always allowed by means of contact
MOD). S02.
Opening is prevented until the circuit-breaker is
in the tripped position. NB: If the magnetic, thermal magnetic or elec-
To reset the circuit-breaker it is necessary to tronic trip unit is present, it is necessary to find
activate the special lever on the front of the the causes which led to the circuit-breaker being
motor until the circuit-breaker goes into the in the tripped position so as to prevent reclosing
open position. under short-circuit conditions. In all cases, man-
ual resetting is always allowed.