75
6.2.4 Circuit-breaker - type HD4
Manual operation for spring charging:
To manually charge the closing springs, fully insert charging lever 90.8 (figure 122) into seat 90.6 and
turn it until the yellow indicator 90.7 appears.
Electrical operation for spring charging:
On request, the circuit-breaker can be fitted with the following accessories for electrical operation:
• geared motor for automatic charging of the closing springs;
• shunt closing release;
• shunt opening release.
The geared motor automatically recharges the springs after each closing operation until the yellow
indicator 90.7 appears. Should there be no voltage during charging, the geared motor stops and then
starts recharging the springs automatically when the voltage is on again. In any case, it is always
possible to complete the charging operation manually.
Circuit-breaker closing:
This operation can only be carried out with the closing springs completely charged. For manual closing
press pushbutton 90.3. When there is a shunt closing release, the operation can also be carried out
by means of a control circuit. The indicator 90.4 shows that closing has been accomplished.
Circuit-breaker opening:
For manual opening, press pushbutton 90.2. When there is a shunt opening release, the operation can
also be carried out with remote control by means of a control circuit. The indicator 90.4 shows that
opening has been accomplished.
An additional control mechanism fitted in the door of the circuit-breaker compartment enables
mechanical operation of the circuit-breaker with the door closed and with the withdrawable part in
either position (figures 7, 8);
• Press the relative mechanical pushbutton, having previously turned knob 45.2 anti-clockwise to the
stop, if the withdrawable part is in the service position;
• Observe the switch position indicator.
Detailed information about installation and maintenance can be found in instruction manual.
10.2
13.15
90.1
90.2
90.3
90.4 90.5
90.7
90.6
Figure 121: HD4 type circuit-breaker - side view
10.2 Control wiring plug
13.15 Withdrawable assembly
Figure 122: Operating and signalling parts of HD4 circuit-
breaker
90.1 Signalling device for state of SF6
pressure (on request)
90.2 Opening pushbutton
90.3 Closing pushbutton
90.4 Operation counter
90.5 Circuit-breaker open/closed indicator
90.6 Shaft for manual closing spring
charging
90.7 Signalling device for closing springs
charged/discharged
To Next Page
Loading...
Need help?
General
