A high-tech enterprise integrating research, design, production and sales of power electronic materials (DBC ceramic

copper clad laminate), devices (power electronic modules), and power electronic devices

Capacitor switching control board
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Capacitor switching control board

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Uses and features

1. The control board is a three-phase AC non-contact switch thyristor trigger controller, which is suitable for the zero-crossing trigger of the thyristor in the occasion of shunt compensation capacitor switching.

2. The control board is designed with a highly reliable thyristor zero-crossing trigger circuit, three-phase independent control, pulse transformer output, and high trigger power.

3. The control board has a self-synchronization function, which eliminates the trouble of identifying synchronization and phase sequence in traditional thyristor circuits, and is convenient to use and debug.

4. The control panel has an integrated structure, unique design, beautiful appearance, simple wiring and good interchangeability.

5. The control board is equipped with a metal shield, which is reliable in work, has a very strong anti-interference ability, and has strong applicability.

Technical parameter

1. Trigger output: six-channel wide pulse train trigger, pulse transformer output; peak trigger current ≥800mA; peak trigger voltage ≥6V

2. Input control signal: A, B, C three channels are independently controlled, DC control voltage input 5~24V (minimum current 1mA) or relay contact input and other switch control.

3. Applicable voltage: three-phase AC 380V.

4. Operating environment: ambient temperature -25~+45℃; relative humidity ≤85%; no conductive dust and corrosive gas

5. Working power supply: 220V±10% 50Hz.

6. Working power supply power: ≤10W.

7. Dimensions: 167×192×60mm. See attached drawing 1 for details.

8. Weight: 1.2kg (including shielding cover).

Wiring and debugging application

1. Wiring: Refer to Table 1 and Figure 2 for wiring.

If switch control is adopted, 9#, 10#, 11# correspond to 8# connection, and 12# is floating. If an external high-level signal is used for control, 9#, 10#, 11# correspond to 12# plus 5~24V DC voltage, and 8# is left floating. 13#-24# are respectively connected to the G and K poles of the thyristor of each arm. Note: The G and K of the controller A+ correspond to the G and K of the main circuit A+ arm thyristor.

In order to prevent interference, it is best to route the given control line and AC power line separately and as short as possible. If it is inconvenient to separate the wires, use twisted shielded wires for the given control wires.

2, test and debugging

Check the wiring before turning on the power. Use a multimeter to check the insulation between the power lines and other control lines to ensure that everything is correct. Disconnect the load and connect the resistive test load, especially when the load is a circuit such as a capacitor or a motor, be sure to disconnect it. Use an incandescent lamp or an electric furnace to connect a connection type suitable for the working voltage as a test load, and then restore the actual load after the test is correct.

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