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Shanghai Yuexi Trade Development Co., Ltd. power regulator design concept
1、Design of the Control Board
2、Selection of radiatorPAC30A series: the use of digital circuit intelligent design, automatic phase discrimination, and strive for simple wiring and high quality requirements, low-cost design, basically achieve the cost of the solid state relay, while making up for the defects of the solid state relay, so that the function of PAC30A has reached: power regulation/voltage regulation arbitrary setting, initial power-on with slow start, manual/automatic adjustment output, output limit, load center grounding or non-grounding arbitrary setting, special voltage and frequency optional, etc.
The radiator adopts a blade radiator with high heat dissipation performance.
3、Selection of fans
4. Selection of thyristor modules120 axial fan, ball bearing type. It has the characteristics of long life and low heat generation.
2 types of thyristor modules are used:
A: The Ximenkang module imported from Germany is characterized by low heat generation and high reliability.
B: Domestic module, specially selected low-voltage drop chip, soldered and pressed with imported insulating materials with high heat dissipation performance Joined. It is characterized by strong overload capacity and reliable quality.
| 1 |
Load Control Element |
hyristor (SCR) Module |
| 2 |
Load Power Supply |
Three-phase 380V AC ±10% 50HZ |
| 3 |
Current Capacity |
25A, 50A, 60A, 80A, 90A, 115A, 140A, 160A, 190A, 250A, 320A, 400A AC |
| 4 |
Control Board Power Supply and Power Consumption |
Power Supply: 380V AC ±10% 50HZ, requires same phase as load power supply Power Consumption: 5W maximum |
| 5 |
Fan Power Supply (depending on model) |
Voltage: 220V AC Current: Below 0.5 A |
| 6 |
Control Input |
4～20mA or 0-10V DC input, receiving impedance 100Ω |
| 7 |
LED Status Indicator |
Input Indicator LED (1): Red Three-color Status LED (1): Green, Running (output on) Yellow flashing, Stopped (no output) Red-green flashing, Heat sink overtemperature alarm (no output) |
| 8 |
Control Mode |
Phase Control: Continuous voltage regulation Power Control: Resistive cycle zero-crossing power regulation |
| 9 |
Output Resolution |
Phase Control: 0.2°, Power Control: 20ms |
| 10 |
Phase Shift Range |
0～175°, Star load (center point grounded) 0～150°, Delta load or Star load (center point ungrounded) |
| 11 |
Drive Output |
With single silicon anti-parallel thyristor module Variable width pulse: 8°~120° Voltage: 5V Current: 100mA maximum |
| 12 |
Manual Mode |
External 10KΩ potentiometer adjustment |
| 13 |
Soft Start Time |
During phase control, adjusted by P3 potentiometer. Adjustment range: 0.2~120 seconds |
| 14 |
Soft Shutdown Time |
During phase control, fixed at 10 seconds |
| 15 |
Voltage Limit |
Adjusted by onboard P1 potentiometer or external 10KΩ potentiometer. Adjustment range: 0~100% |
| 16 |
Heat Sink Overtemperature Protection |
80℃ temperature switch, normally closed contact Action time: < 20ms |
| 17 |
Alarm Output |
Activated when heat sink overtemperature Specification: 1 normally open contact, 1A 250V AC resistive Output terminals: CN2-1, CN2-2 |
| 18 |
Emergency Stop |
When the alarm is activated, the control output will stop urgently Action time: < 20ms Disable: After the alarm is dismissed, enter the standby state or power on again |
| 19 |
Fan Control |
The fan is connected to a normally open temperature switch at 40°C. When the heatsink temperature is below 40°C, the fan does not rotate, ensuring the fan's lifespan. Fan power supply: 220V. |
| 20 |
Start/Stop Switch (External Switch) |
R1 terminal: CN1-3 terminal, RS terminal: CN1-7 terminal. R1 - RS terminal: Voltage-free contact input. Short-circuit voltage regulation (factory setting): slow shutdown, open circuit: slow start |
| 21 |
Power regulation/voltage regulation switching (SW1-1 DIP Switch) |
SW1-1=ON, Voltage Regulation (Factory Setting) SW1-1=OFF, frequency power regulation |
| 22 |
Working environment and storage temperature |
Temperature range: 0~+40°C Humidity range: 90% RH max, no condensation Altitude: below 2000m Storage temperature: -10~+60°C Other requirements: good ventilation, no direct sunlight or thermal radiation, no corrosion sexual, flammable gases |
| 23 |
Installation form and requirements |
Wall-mounted, vertically mounted, well ventilated |
| 24 |
Insulation Insulationresistance Dielectric strength |
Insulation resistance: module output and housing, 500VDC 20MΩ minimum
The power supply end and enclosure of the control board are 500VDC 20MΩ minimum |
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Classic SCR three-phase power regulator selection table
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Code |
Basic parameters |
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| PAC30A- |
Input signal: 4-20mA DC signal (input impedance 120 ohms), output form phase shift voltage regulation/frequencyower regulation can be set arbitrarily,power on slow start 0-60 seconds can be set, radiator over-temperature alarm protection, manual automatic non-disturbance switching. It is suitable for Y-type load center connection or dangling, triangular load. Load power supply 380VAC ± 10%, 50Hz The default input signal is 4-20 mA, and the 0-5V and 0-10V input require remarks The default power supply of the fan is 380V pass-through, and 220V control is required.
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Radiator unit |
Overall dimensions of the whole machine |
SCR specifications |
Load power (resistive) |
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B160S-: 1 fan, blow-type forced air cooling. Radiator capacity: ambient temperature at 40 degrees: 150A/phase. Natural heat dissipation conditions: 15A/phase. |
L 290mm, W 170mm, D 240mm, 4 hole mounting
Mounting hole spacing:100mm*274mm, hole diameter 10mm |
MKKT90A |
≤42KW |
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MKKT110A |
≤52KW |
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MKKT130A |
≤63KW |
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MKKT180A |
≤90KW |
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MKKT200A |
≤98KW |
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| unit mm | A | B | C | D | E |
| B160S | 290 | 171 | 240 | 100 | 274 |
