Low voltage reactive power compensation device for capacitors switching compound switches

Low voltage reactive power compensation device for capacitors switching compound switches

Description

ZBFK series low-voltage composite switch is an intelligent energy-saving capacitor switching switch carefully developed for the defects of SCR and AC contactor in the application of low-voltage reactive power compensation. It is suitable for the rapid switching of low-voltage reactive power compensation capacitors cut control.

Working principle is to connect the thyristor module (1600V reverse double-well connection type) in parallel with the AC contactor (magnetic latching relay), and through the analysis and control of the internal chip, automatically find the best input (cut) point, so that the composite switch is The moment of input and removal has the advantage of zero-crossing switching of the thyristor, and it has the advantage of low power consumption of the contactor during normal operation.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.

Advantages

Composite switch has the characteristics of low power consumption, no heat, no harmonics, safety and reliability, and its switching speed is between the contactor and the thyristor non-contact switch, and it has a wide range of applications.

1. Zero-crossing switching: SCR and magnetic latching relay are connected in parallel to realize voltage zero-crossing conduction and current zero-crossing cutoff, no inrush current, no arc.
2. Voltage phase loss protection: When the system voltage lacks phase power supply, the switch refuses to close; if there is a phase loss, it will automatically return to the input.
3. Power lack phase protection: When the working power supply lacks phase power, the switch refuses to close; if there is a lack of phase, it will automatically return.
4. Undervoltage protection: The switch refuses to close when the voltage is less than or equal to 20% of the rated voltage (220V).
5. Self-diagnostic failure protection: If the component fails, it will refuse to close or automatically return to open.

6. No-load protection: The switch refuses to close when the load is not connected.
7. Power failure protection: When a sudden power failure occurs after being connected, it will automatically trip and disconnect.
8. No harmonic injection: zero-crossing trigger will not generate harmonics.
9. Low power consumption: only consumes power at the moment of switching action, not usually
10. Photoelectric isolation technology: strong anti-interference ability, safe and reliable work.
11. Intelligent control technology has extremely high performance advantages in terms of inrush current and safety and reliability.
12. Compared with similar products, it has advanced technology, high efficiency, low consumption and environmental protection, especially in terms of safety and reliability.

Precautions

1. It is strictly forbidden to reverse the AC input and output.

2. DC control mode: the input polarity of the level signal must be connected correctly.

3. AC control mode: please confirm the control voltage.

4. Communication control mode: the data line is plugged in correctly and in place.

5. It must be noted that the switch and the capacity of the connected capacitor match properly.

6. The phase sequence of the three-phase A, B, and C of the main circuit of the power supply must be connected correctly.

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