Thyristor Control Board Rectifier Circuit for Electroplating SCR Firing Card

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. 

ST33 Thyristor/SCR control board wiring diagram
Contact for more details