A-019
HYW3
Series Intelligent Universal Circuit Breaker
A
Primary power distribution
Figure 7 Drawer seat of the HYW3 Series Intelligent Universal Circuit Breaker
1: Draw-out circuit breaker
The draw-out circuit breaker consists of a circuit breaker body and a drawer. Guide rails are arranged on both sides of the drawer seat, which
have movable guide plates on them, and the main frame of the circuit breaker is placed on the left and right guide plates. The drawer circuit
breaker is connected to the main circuit by inserting the busbar on the breaker body into the bridge contact on the drawer seat. Through
cranking the handle of the lower beam of the drawer seat, three working positions of the drawer circuit breaker can be realized (there is a
position indication beside the handle).
“Connection” position: The main circuit and the secondary circuit are connected.
“Test” position: The main circuit is disconnected and separated by an insulating plate. Only when the secondary circuit is connected, the
necessary operation test can be carried out.
“Disconnection” position: The main circuit and the secondary circuit are all disconnected. If the circuit breaker body needs to be removed in
the “Disconnection” position, the rocker handle must be removed.
The draw-out circuit breaker has a mechanical interlocking device, which can only make the circuit breaker closed at the connection position or
the test position. It cannot be closed in the middle of the connection and test positions.
2: Interlocking mechanism
The interlocking mechanism is installed on the right side plate of the circuit breaker. The flat circuit breaker is interlocked by the steel cable
(Figure 8), and the stacked circuit breaker is interlocked by the connecting rod (Figure 9). When one circuit breaker is in the closing state, the
other one cannot be closed. The interlocking mechanism is installed by the user.
Secondary circuit terminal
(drawer)
Holder
Adjusting frame
Guide rail lock
Guide rail
Drive shaft
HYW3-1600/3 Drawer Seat
