ABB
35
Uniswitch Operation and
Maintenance Manual
UNIS14GB 05-02
4.4.4 Circuit-breaker – type HD4
4.4.4.1 Manual operation for spring charging
Instructions
Figure 4.19
Manual charging of HD4
circuit-breaker springs.
To manually charge the closing springs, fully insert charging lever (80.5)
into seat (44.5) (Figure 4.20) and turn it until the yellow indicator (43.4)
(Figure 4.20) appears.
4.4.4.2 Electrical operation for spring charging
Instructions
Figure 4.20
Operating and signaling parts
of HD4 circuit-breaker
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 (43.4) 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.
4.4.4.3 Circuit-breaker closing
Instructions
! This operation can only be carried out with the closing
springs completely charged.
For manual closing press pushbutton (43.2). When there is a shunt
closing release, the operation can also be carried out by means of a
control circuit.
The indicator (43.3) shows that closing has been accomplished.
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