System Manual
3 Product Description
17
3.4.4
Operations on the DC circuit breakers
The MV Station is equipped with electrically-controlled air circuit breakers on the DC side.
The appearance of the circuit breaker panel is shown in the figure below.
A
D
C
B
E
Push OFF
Push ON
DISCHARGED
SPRING
CLOSED
Item
Name
Description
A
Manual energy storage
handle
When the circuit breaker has no energy, you can
manually store energy through this button.
B
Circuit
breaker
state
indicator
Display the present state of the circuit breaker, OPEN or
CLOSED
C
Push OFF button
The breaker is switched off when this button is pressed
D
Push ON button
The breaker is switched on when this button is pressed
E
Energy
storage
state
indicator
Display the present energy storage state, CHARGED
SPRING or DISCHARGE SPRING
The DC Switch can be used together with a micro-motor. When there is the
power supply on the MV Station AC side, the energy can be stored to the
breaker through this motor; when there is no power supply on the MV Station
AC side, you need to store the energy through the manual energy storage
handle.
The operation steps are briefly described in followings.
Switch on
Press the Push ON button on the breaker panel to switch on the breaker.
Before switching on the breaker, you need to check if the energy storage state displayed on
the panel is CHARGED SPRING. If the state is DISCHARGED SPRING, you need to store
the energy manually by turning the manual energy storage handle down until the breaker
panel displays CHARGED SPRING.
DISCHARG
ED
SPRING
CHARGED
SPRING
After the breaker is switched on, the breaker panel displays CLOSED.
Switch off
Press the Push OFF button on the breaker panel to switch off the breaker.
After the breaker is switched off, the breaker panel displays OPEN.
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