Xu Ji ZYQ-811 voltage switching box
ZYQ-811 device is suitable for the double bus wiring system. In order to ensure that the electrical components connected to the double bus wiring system are running, the primary system and the secondary voltage system correspond to avoid protection and automatic device error or rejection.
Xu Ji ZYQ-811 voltage switching box
2. Functional configuration
The device has a total layer of boxes, composed of two plug-ins, including two voltage switching plug-ins, both using the rear plug and plug type, to ensure the flexible and convenient configuration.At the same time, the device can automatically switch the voltage.
3. Main technical principles
During the normal operation, If the line is connected to the section I bus line, The voltage switching relay 1YQJ1~1YQJ9 is in the excitation state, The other set of relays 2YQJ1~2YQJ9 are uncharged, AC voltage for line protection and automatic device is controlled by Y Q J 1 ~ 1 Y Q J 9, When the isolation switch auxiliary contact has poor contact or the DC power supply disappears, Relay 1YQJ1~1YQJ9 returns without excitation, At the same time, the series circuit voltage loss signal of the circuit breaker and the relay 1YQJ7 and 2YQJ7, The engaged relay contact or the auxiliary contact of the circuit breaker in the signal circuit is designed to avoid false signal transmission when the line is repaired or stopped from operation.The voltage circuit is automatically switched by the intermediate relay. In the process of reverse bus line, the reverse charging of the standby voltage transformer should not be formed.If Y Q J 1 ~ 1 Y Q J 9, Y Q J 1 ~ 2 Y Q J 9 are excited at the same time, the Y Q J 7 and Y Q J contacts can be connected in time, and the operator is not allowed to disconnect the bus circuit breaker to prevent reverse charging.
In order to increase the reliability of the voltage switching box, the switching power supply of the voltage switching intermediate relay 1YQJ1~1YQJ9,2YQJ1~2YQJ9 shall be controlled by the position relay of the voltage transformer disconnecting switch, the auxiliary contact of the automatic air switch and the auxiliary contact of two groups of line disconnecting switch.
According to the reverse measure requirements, the secondary voltage circuit equipped with distance protection adopts zero-phase ground, and the zero-phase line does not pass through any switch box or switch interlocking contacts
Xu Ji ZYQ-811 voltage switching box
4. Technical data
4.1 Basic Data
4.1.1 Rated data
Rated DC voltage: 220V or 110V;
4.1.2 Power consumption
At rated DC voltage, the power consumption is not greater than 40W.
4.1.3 Contact performance
In the DC inductive load circuit where the voltage is not more than 250V, the current is not more than 0.5A, and the time constant is 5ms±0.75ms, the disconnection capacity is 50W, and the long-term allowed passing current is 5A.
Xu Ji ZYQ-811 voltage switching box
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