GI-E Range
Operating mechanism
PE60234
b The SF6 gas circuit breaker GI-E range is equipped with a well proven stored
energy type operating mechanism, series GMh, suitable for three-pole reclosing.
This type of operating mechanism has been used for many years in the indoor circuit
breakers too and it is proven by a long service experience. The spring motorcharged
operating mechanism has been designed in order to assure a long mechanical life.
b The operating mechanism is stored energy type.
v The closing springs are charged by a motoreducer that can be operated either by
d.c.or by a.c.operating voltages;
v after every closing operation the motoreducer automatically recharges the closing
spring.(Charging time is less than 15 seconds) The opening springs get charged with
the energy stored by the closing spring during the circuit breaker closing operation;
v in case of emergency the springs can be manually charged by means of hand
charging lever. This device is removable type, located on the front of the operating
mechanism;
v the stored energy is capable to carry out the O-C-O cycle without recharging.
b Opening and closing operations have a speed independent from the operator one.
b The opening and closing operations of the circuit breaker can be performed either
electrically by means of electrical push buttons, operating opening and closing coils,
or manually, by means of mechanical push buttons.
v The mechanical and electrical push buttons are provided on the front of the
operating mechanism.
b The electrical closing and opening operations can be performed either locally or
remotely.
v The operating mechanism is equipped with a 3 positions selector switch, (local/
zero/remote positions with withdrawble key in zero and remote positions and with N°1
aux.contact available in order to remotely signalize the local and zero positions).
The spring motorcharged operating mechanism complete of all its operating and
control devices is housed in an hot dip galvanised box.
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