SCR firing card/ Thyristor Trigger Control Board

ST33 three-phase rectification thyristor control voltage trigger regulator board (it can also be called SCR firing card, SCR firing board, thyristor triggering board, SCR/thyristor power regulator and SCR power controller.) adopts 32-bit industrial grade high-performance microprocessor, high digital precision quality design, support network remote control and on-site control mode. The fuzzy-PID parameter is open-ended, which integrates open-loop voltage regulation, closed-loop constant voltage and constant current in one, to control the thyristor to achieve constant voltage current limiting or constant current voltage limiting. The fault alarm and interface parameters are displayed on the LCD screen or touch screen menu in Chinese, and parameters are automatically stored after setting. The control board (regulator) has the functions such as phase loss protection, power-on soft start, soft shutdown, constant current output, constant voltage output, overvoltage protection, overcurrent protection, short circuit protection, and working status indication. It has three-phase full-control bridge rectification, double anti-star rectification and thyristor anti-parallel AC triggering mode, which can trigger thyristor below 5000A, suitable for resistive load and, inductive load, capacitive load, transformer primary side and other types of loads which adjust by voltage and current regulation in various fields of industry. It has been widely used in electrolytic and plating devices, battery charge and discharge devices, three-phase thyristor power supply devices, electric heating temperature control devices, arc discharge control and other equipment.

Technical Specifications：

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

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

◆ Voltage adjustment range: 0 ~ 100%

◆ Current adjustment range: 0 ~ 100%

◆ Display methods: LCD interface

◆ Phase shift range: 0~178°

◆ Adjust output resolution: 1/4000

◆ Stability accuracy: better than ±1% or 1V

◆ Trigger current: ≥ 750mA

◆ Trigger capacity: ≤ 5000A thyristor

◆ PID dynamic response time: ≤ 50mS

◆ Overshoot: ≤ 10%

◆ Input signal: Panel button operation or DC0-5V or DC0-10V or 0-10mA or 4-20mA or 10K potentiometer adjustment  (Pls express which you need)

◆ Three-phase trigger imbalance: ≤ 0.3°

◆ Applicable load: Resistive, inductive, capacitive, transformer load and other loads

◆ Alarm relay contact capacity: 250Vac/10A

◆ Dielectric strength(voltage isolation): 3500 Vac for 1 minute

◆ Ambient (working) temperature: -20°C~ 60°C

◆ Working Relative humidity: ≤ 90% RH (no frost)

◆ Indoor installation requirements: no flammable, no explosive, no corrosive gas, no conductive dust, and vibration should be less than 0.5G

◆ Dimensions: 240 * 160 * 50mm

◆ Dimensions between install holes: 225 * 145mm

◆ Weight: 1KG

ST33 meets the standard:

IEC60947-4-2: Low-voltage switchgear and controlgear. Part 4-2: Contactors and motor-starters. AC semiconductor motor Controllers and starters.

GB14048.6-1998: Low-voltage switchgear and controlgear Part 4-2: Contactors and motor starters AC semiconductor motor controllers and starters.

GB3797-89: Electronic Control Equipment Part II - Electronic Control Equipment with Electronic Devices.

IEC61000-4: Electromagnetic compatibility, test and measurement technology.

IEC65: Safety of household and similar general purpose electronic and related equipment powered by grid power.