1 phase, 32 bit industrial level high performance micro-processor, high digitized, exquisite quality design, close loop and open loop, with or with out constant power, 220V input, 600A trigger capacity, multiple version to choose.
ST21 signle phase digital thyristor trigger board adopts 32 bit industrial level high performance micro-processor, high digitized, exquisite quality design, support both network remote control and on-site control method. Fuzzy-PID parameter regulation openness, it combined with open loop regulation, constant voltage regulation, constant current regulation and constant power regulation four kinds of regulation methods into one board, user can choose them freely. Default alarm and interface parameter uses LED digital tube to display, parameters will be automatically saved after setting, and all are digital, no temperature shift. It is with strong anti-interference ability, unique anti-interference measures makes it can work normally even in an extreme interference environment. Strong universality, wide application range, with overheat protection, soft start, soft stop, over voltage protection, over current protection, short circuit protection, phase loss protection and output limit function. It is widely used in thyristor power supply, electric heating temperature control devices, electricity power regulator and other devices.
Technical specifications
1. Working power supply: 220V ±15%, 50/60HZ frequency (Can be customized 380VAC/440VAC according to customer’s needs)
2. Main circuit working voltage: 220/ 380Vac ±15%, 50/60HZ frequency
3. Voltage / Current regulation range: 0 ～100%
4. Trigger current: ≥ 500mA Trigger capacity: ≤ 600A thyristor module
5. Regulation stability: ± 1 VAC or 1%
6. Dielectric strength (voltage isolation): 3500 VRMS
7. Suitable loads: Resistive load, inductive load, capacitive load and transformer primary and other loads
8. No-load consumption: < 10W
9. Mechanism: 180 * 125 * 38 mm (length * width * height)
10. Working temperature: -20℃ ～ 60℃, relative humidity: ≤ 90%
11. LED digital tube display
12. Phase shift angle: 1~178 degree
Adjust output resolution: 1/4000
13. Weight: 0.6Kg
| Item | Power Supply | RS485 Communication | Insert Voltage Sensor | Constant Power | Display |
| ST21A | AC220V | Yes | Yes | Yes | LED digital tube display |
| ST21B | AC220V | No | Yes | Yes | LED digital tube display |
| ST21C | AC220V | No | Yes | No | LED digutal tube display |
| ST21D | AC220V | No | No | No | LED digital tube display |
| ST21E | AC220V | Yes | Yes | No | LCD display |
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