ZUFK Common compensation intelligent composite switch

Main purpose and scope of application
ZUFK series intelligent composite switches (composite switches for short) have two types: common compensation and separate compensation switches. The common compensation switch is used to switch three-phase capacitors and adopts the delta connection; the separate compensation switch is used to switch single-phase. The capacitor adopts the Y-shaped connection method. The composite switch uses a thyristor switch and a magnetic latching switch to run in parallel, which has the advantage of zero-crossing switching of the thyristor at the moment of turning on and off, and has the advantage of zero power consumption of the magnetic latching switch during the normal on period. The composite switch has significant advantages such as no impact, low power consumption, and long life. It can replace contactors or thyristor switches and is widely used in the field of low-voltage reactive power compensation.
This product complies with: National Standard GB/T29312-2012 (our company is the main drafting unit of this standard)

Working conditions
1. Working temperature: -25℃~55℃ Storage and transportation temperature: -40℃~85℃;
2. Relative humidity: 5%-95%, non-condensing;
3. Atmospheric pressure: 80kPa-110kPa;
4. Altitude Height: <2000m;
5. Earthquake intensity: <8;
6. Installation site: Except for fire, explosion, flooding, strong chemical corrosion and other places, there is no severe vibration;

Model and meaning

Main technical parameters
1. Rated voltage: 400/230V±20%
2. Switch withstand voltage: ≥2000V
3. Switch voltage drop: ≤0.05V
4. Electromagnetic compatibility: Pulse group IEC255-22-1 Class 2 radiated electromagnetic field IEC60255-22 -3 Class 2 electrostatic discharge IEC255-22-2 Class 3 fast transient IEC61000-4-4 Class 3
5. Service life: more than 300,000 times
6. Switching power consumption: ≤2W
7. On-off interval: ≥30 seconds
8 、Allow current harmonic: ≤10%
9. Control level: 5-24VDC
10. Input current: <10mA
11. Insulation strength: 2.5kV/1mim

Indicator instructions
1. Only one of the closing and opening indicator lights is on at the same time, which is used to indicate the working status of the switch.
2. When the lack of phase indicator light is on, it means that at least one phase of the three-phase input is lack of phase. The common compensation type has the function of lack of phase quick disconnection.
3. When the delay indicator light is on, it means that the switch has a control signal input and the closing indicator light is on. However, the default capacitor discharge delay can not be closed immediately. At this time, the delay indicator flashes, and the delay will be delayed after the discharge delay has passed. When the indicator goes out, put the switch on.

Features
1. Voltage zero crossing input, current zero crossing removal, no inrush current, no overvoltage;
2. Low power consumption after the switch is turned on, no need for external heat sink;
3. The switch itself does not generate harmonics;
4. Input signal Photoelectric isolation with the switch, high EMC protection measures, strong anti-interference ability;
5. It can be directly used in conjunction with the company's dynamic compensation controller;
6. With switch operation status divided into iE] and combined question, lack of phase and delay indicator;
7. With enhanced comprehensive protection functions, including system input voltage phase loss protection, power supply voltage phase loss protection, undervoltage protection, power failure protection, self-diagnostic fault protection, etc.;

Wiring schematic diagram

Note: The total compensation switch can only be connected to 380V signal lights; the sub-compensation switch can be connected to 380V or 220V signal lights

Shape and installation dimensions

Note
1. The connection between the sub-compensation switch and the capacitor adopts the Y-shaped connection, that is, the three output terminals of the switch are connected to one end of three single-phase capacitors, and the other end of the capacitor is connected to the neutral line.
2. If the compound switch is used when the harmonic content is greater than 5%, it is recommended to take harmonic control measures according to the situation.
3. The compound switch is not suitable for places where frequent switching is required. It is recommended that the switching interval be greater than 30 seconds.
4. Vertical installation, fixed diagonally, using upper and lower two layers of U-shaped channel steel for fixing, and it is forbidden to use iron plates for sealing and fixing.
5. When using a composite switch, pay attention to the proper selection of capacity specifications and reliable wiring.
6. When using a single-phase composite switch, the neutral line of the single-phase capacitor must be in good contact, otherwise it will likely cause damage to the composite switching power supply neutral line carrying too high neutral current.

Ordering instructions
1. For the split-compensation switch, the capacity of the capacitor refers to the sum of the capacity of the three single-phases.
2. There are two control modes for the split-compensation switch, which respectively support the controller output adopting the public positive terminal or the public negative terminal. If the company's supporting power factor automatic compensation controller is used, the public positive terminal output will be adopted.
3. Selection of heating current for composite switch: usually 60A for capacity not greater than 20kvar, 80A for 21kvar-30kvar, and 100A for (31 -40)kvar.