The ST36 twelve-pulse three-phase rectifier thyristor trigger board utilizes a 32-bit industrial-grade high-performance microprocessor and is designed according to high-standard digital safety specifications. It supports both network remote control and on-site control, with open Fuzzy-PID parameter adjustment. It integrates three regulation modes—open-loop voltage regulation, closed-loop constant voltage, and constant current—enabling thyristor control for constant voltage with current limiting or constant current with voltage limiting.

Features include fault alarm and a user interface with parameters displayed via an LCD screen or touchscreen using a Chinese menu. Set parameters are automatically stored. The control board is equipped with functions such as phase-loss protection, soft start on power-up, soft shutdown, manual current sharing, constant current output, constant voltage output, overvoltage protection, overcurrent protection, short-circuit protection, and operational status indication.

It employs a twelve-pulse three-phase full-control bridge rectification or a double inverse star twelve-pulse rectification triggering method with a balancing reactor. It can trigger thyristors rated up to 5000A and is suitable for various load types requiring voltage and current regulation across industrial fields, including resistive loads, inductive loads, and transformer primary sides. It is widely used in equipment such as electrolysis, electroplating systems, and three-phase thyristor power supplies.

Technical Specifications:

Working Power Supply: 220/380Vac ±15%, 50/60Hz

Main Circuit Operating Voltage: 50–660Vac ±15%, 50/60Hz

Voltage Adjustment Range: 0 to full-scale voltage

Current Adjustment Range: 0 to full-scale current

Display Method: LCD screen or touchscreen with Chinese menu

Phase Shift Range: 0–178°

Output Adjustment Resolution: 1/4000

Stability Accuracy: Better than ±1%

Triggering Current: ≥ 750mA

Triggering Capacity: ≤ 5000A unidirectional thyristor

PID Dynamic Response Time: ≤ 50ms

Overshoot: ≤ 10%

Input Signals: DC 0-5V, DC 0-10V, 0-10mA, 4-20mA, 10K potentiometer adjustment

Three-Phase Trigger Imbalance: ≤ 0.3°

Suitable Loads: Resistive, inductive, transformer primary side, and other loads

Alarm Relay Contact Rating: 250Vac / 10A

Dielectric Strength: 3500 VRMS

Dimensions: 240 × 160 × 50 mm

Panel Cutout Dimensions: 225 × 145 mm

Weight: 1.3 kg

Operating Environmental Conditions:

Ambient Temperature: -20°C to 60°C

Relative Humidity: ≤ 90% RH (non-condensing)

Indoor Installation: Environment free from flammable, explosive, corrosive gases, and conductive dust; vibration less than 0.5G.

Altitude: Below 3000 meters. For altitudes exceeding 3000 meters, appropriate derating of capacity grade should be applied.

Product Compliance Standards:

IEC 60947-4-2: Low-voltage switchgear and controlgear – Part 4-2: Contactors and motor-starters – AC semiconductor motor controllers and starters.

GB 14048.6-1998: Low-voltage switchgear and controlgear – Part 4-2: Contactors and motor-starters – AC semiconductor motor controllers and starters.

GB 3797-89: Electrical control equipment – Part 2: Electrical control equipment with electronic components.

IEC 61000-4: Electromagnetic compatibility (EMC) – Testing and measurement techniques.

IEC 65: Safety requirements for mains-powered electronic and related equipment for household and similar general use.