SJKQ2Z series intelligent automatic dual power conversion switch

Scope of application
The SJKQ2Z series intelligent automatic dual power transfer switch (hereinafter referred to as the switch) is suitable for AC 50Hz, rated working voltage 400V, and rated working current 16A~1600A. The switch used for the mutual conversion between the two commonly used power sources (N) and the backup power source (R) in emergency power supply systems (can also be set manually) and as a control circuit for control, signaling, interlocking, and other purposes. This product has a communication port in some models, which can achieve remote control and allow users to realize unmanned substations. Suitable for residential communities, military facilities, hospitals, shopping malls, airports, and other places

Normal working conditions
The installation altitude shall not exceed 2000 meters
The upper limit of the ambient temperature should not exceed+40 ℃, the lower limit should not be lower than -5C, and the 24-hour average value should not exceed+35C
The relative humidity of the atmosphere should not exceed 50% when the ambient air temperature is+40 ℃. At lower temperatures, there may be higher temperatures, and it should be considered that humidity changes can cause condensation on the surface of the product
◆ Non explosive medium, and the medium does not contain gases and dust that can corrode or damage insulation
◆ Places without significant shaking or impact vibration
Structure and Function
This intelligent conversion switch consists of two main parts: a microcomputer controller and a switch conversion device, which are connected by dedicated cables. The switch is composed of a microcomputer controller, a micro motor, a gear machine, a micro switch, an operation keyboard, an LCD display screen, a molded case circuit breaker, etc. Capable of automatic and manual operation; The dual interlocking of mechanical and electrical components maximizes the satisfaction of power supply and distribution needs. The switch has three operating positions for users to choose from: common power (N) on, double off, and backup power (R) on. The switch has the characteristics of small size, light weight, stable operation, and easy use
Intelligent controller function
SJKQ2Z is a new type of intelligent automatic dual power conversion switch. The intelligent controller is input by keyboard and displayed on LCD, which can synchronously detect the common power supply (N) and the backup power supply (R) in three phases: for phase failure, voltage loss or undervoltage, when it is lower than 85% of the rated working voltage value, it is judged as undervoltage, and the backup power supply (R) fault alarm and double division. The microcomputer processes the detection results and issues corresponding instructions, and the processing results can be displayed on LCD, providing users with a good human-machine dialogue interface. The alarm can also be manually turned off. Regardless of the current working mode, if the microcomputer detects abnormal data, it will disconnect from the abnormal power supply and enter the dual protection state within 3 seconds. After a delay (0-30 seconds), it will switch to normal power supply. Example: In the self switching and self recovery mode, if the common power supply (N) fails, it will automatically switch to the backup power supply (R) for power supply. If the common power supply (N) returns to normal, it will automatically return. If both working power supplies fail, the microcomputer will issue a dual split command after 3 seconds, and the power supply that returns to normal will be given priority for operation




Note: The above diagram is for user reference only. The comprehensive functional wiring diagram may vary depending on the model and function. When a fire occurs, the EPS fire signal is activated (provided by the fire center), causing the Q1 and Q2 circuit breakers to trip or be in a disconnected state
(KG) wiring terminal
(Q1, Q2) Circuit breakers
(Built in) power generation and unloading contacts
The dotted line is provided by the user