The trigger plate is an integrated trigger plate with three-phase AC voltage regulation and power regulation (it cannot be used for rectification). Phase shifting voltage regulation can be suitable for various types of loads, and zero-crossing power regulation is only suitable for constant resistance loads.
Phase-shifted voltage regulation type adjusts the output voltage by changing the size of the conduction angle. This trigger method is continuous, providing a stable output voltage with no voltage spikes and can limit instantaneous current. It is suitable for various types of loads. Currently, transformers, inductive coils, and variable resistance loads all use this trigger method. However, this trigger method can cause harmonic pollution to the power grid.
Change the cycle to zero adjustment type
The zero-crossing adjustment type operates at the zero point of a sine wave, using a complete sine wave as a unit. By changing the period of the on-off sine wave, it adjusts the output power. This ensures that the on-sine waves are evenly distributed, causing only slight fluctuations in the needle readings of voltmeters and ammeters. When multiple regulators operate, this method avoids current concentration because the zero-crossing trigger does not pollute the power grid and has a high power factor. However, it cannot limit instantaneous current, making it unsuitable for inductive loads and variable resistance loads. Constant resistance loads generally use this triggering method.
2. Trigger plate setting
P1 potentiometer
The P1 potentiometer is a preamplifier potentiometer, which is designed to convert 4-20mADC into 0-5VDC. It is set at the factory and does not need to be set
P2 potentiometer
P2 potentiometer is the overcurrent alarm setting potentiometer. The factory setting is: when CT voltage exceeds 4.4VDC, an overcurrent alarm occurs. No special setting is required under no special circumstances
P3 potentiometer
The P3 potentiometer is a current limiting potentiometer. The factory setting is that when the CT voltage exceeds 4VDC, the trigger board automatically reduces the output voltage until the CT voltage is less than 4VDC. Users can set the P3 potentiometer according to the field requirements.
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