ABB ZX0 Manual For Installation And Operation page 47

Circuit-breaker operating mechanism
− On failure of the supply voltage, the circuit-breaker can be
opened at any time by pressing the mechanical OFF but-
ton. Closing of the circuit-breaker with the mechanical ON
button is dependent on the stored-energy spring mecha-
nism being charged. The condition of the stored-energy
spring mechanism is displayed mechanically (10 in figure
4.1.2.3.1.1).
− On failure of the supply voltage or the stored-energy spring
charging motor for the circuit-breaker operating mecha-
nism, the charging process can be performed or completed
manually.
− To do this, insert the charging lever (11 in figure
4.1.2.3.1.1) into the receptacle and perform approxi-
mately 25 strokes until the charged condition is indi-
cated
− When the charged condition is reached, the charging
mechanism is disengaged, and no further movements of
the charging lever can be made.
Fig. 4.1.2.3.1.1: Manual charging of the stored-energy spring
10
11
12
Condition indicator for
the stored energy spring
Charging lever
Receptacle for charging lever
11
12
10
Indication of spring
discharged
Indication of spring
charged
Manual ZX0 HB 600 en - Revision 05 | 47