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LCD liquid crystal display, 12-bit data acquisition precision, ST31 three-phase thyristor voltage regulation module uses 32-bit industrial-grade high-performance microprocessor, designed to technical safety standards High digital, support network remote control and local control mode, Fuzzy -PID Open-loop parameter adjustment integrates three adjustment methods: open-loop voltage regulation, closed-loop constant voltage and constant current, and control the thyristor to achieve constant voltage current limiting or constant current voltage limiting.


ST31 three-phase rectifier thyristor trigger board uses 32-bit industrial-grade high-performance microprocessor, high digital safety standard design, supports network remote control and on-site control mode , open adjustment of Fuzzy-PID parameter, set open-loop voltage regulation, Closed-loop constant voltage and constant current regulation modes are integrated into one mode, and the thyristor is controlled to achieve constant voltage current limit or constant current voltage limit. Interface parameters and error warnings are displayed on the LCD liquid crystal display or Chinese menu on the touch screen, and the setting parameters are automatically stored. The control board has functions such as phase loss protection, power-on soft start, soft shutdown, constant current output, constant voltage output, overvoltage protection, overcurrent protection, protection short circuit and working status indicator. It has fully controlled three-phase bridge rectifier, double inverting star rectifier and anti-parallel AC triggering mode by thyristor, can trigger thyristor below 3000A, suitable for resistive load, inductive load, regulate voltage and current in various industrial fields. Capacitive loads, transformer primary side and other types of loads are widely used in electrolytic plating, battery charging and discharging, three-phase thyristor power supply, electric heating temperature control, discharge control arc and other devices.

Please choose the ST33 model, the performance remains the same, and the ST31 model is no longer delivered to new customers.


◆ Working power source: 220 / 380Vac ± 15% 50 / 60HZ

◆ Main circuit working voltage: 50 ~ 660Vac ± 15% 50/60HZ

◆ Voltage adjustment range: 0 ~ full scale

◆ Current adjustment range: 0 ~ full scale

◆ Display mode: Chinese interface on LCD screen

◆ Phase shift range: 0 ~ 178° Adjustment output resolution: 1/4000 Stability accuracy: better than ±1%

◆ Trigger current: ≥ 750mA Trigger capacity: ≤ 3000A DC thyristor

◆ PID Dynamic response time: ≤50mS Deviation: ≤10%

◆ Input signal: DC0-5V, DC0-10V, 0-10mA, 4-20mA, 10K potentiometer adjustment

◆ Three-phase trigger imbalance: ≤ 0.3°

◆ Applicable load: main measurement of capacitance and transformer and other loads.

Indoor installation: no flammable, explosive, corrosive gases, no conductive dust, vibration less than 0.5G, and altitude less than 3000 meters. If it exceeds 3000 meters, the power level should be reduced appropriately.

Dimensions: 240X160X50mm

Opening size: 225X145mm

◆ Weight: 1KG

◆ Products conform to standards:

IEC60947-4-2: Low-voltage switchgear and control equipment Part 4-2: Motor contacts and starters. AC semiconductor motor starter and controller.

GB14048.6-1998: Low-voltage switchgear and control equipment - Part 4-2: Contactors and motor starters AC semiconductor motor starter and controller.

GB3797-89: Electronic control equipment Part 2 - Electronic control equipment with electronics.

IEC61000-4: Electromagnetic Compatibility, Testing and Measurement Techniques.

IEC65: Safety of household and similar general purpose electronic appliances and associated equipment powered by mains power.

Related accessories and products:

STP30 Constant Voltage Feedback Board ;

STP10 RC absorption board;

STP22 enabled expansion module;

Display operation module STP01 ;

SFP30 high voltage acquisition module;

Module SFP20IGTB ; Module SFP21IGTB.

ST31 three-phase thyristor voltage regulator module


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