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Zero-Crossing Cycle Phase Control Three-Phase Power Regulator
1、Design of the Control Board
The PAC35C series intelligent SCR cycle power controller is a new product in the application technology of high-power thyristor modules. It operates in cycle power control mode and features automatic phase discrimination, soft start and shutdown upon power-up, and heat sink overtemperature protection. It is suitable for resistive loads and can be configured by customers for center-grounded or ungrounded loads, achieving true intelligence.
2、Selection of radiator
The radiator adopts a blade radiator with high heat dissipation performance.
3、Selection of fans
120 axial fan, ball bearing type. It has the characteristics of long life and low heat generation.
4. Selection of thyristor modules
The Ximenkang module imported from Germany is characterized by low heat generation and high reliability.
| 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 Power Consumption: 5W maximum No separate wiring for power supply is required. |
| 5 |
Fan Power Supply (depending on model) |
Voltage: 220V AC Current: Below 0.5 A |
| 6 |
Control Input |
0-24V DC PWM input (fixed cycle 2 seconds), input impedance 10K. |
| 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 |
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 power supply is 380V.
|
| 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 adjustment (SW1-1 DIP switch)
|
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 Control input and housing, 500VDC 20MΩ minimum The input and power supply of the control board are 500VDC 20MΩ minimum Dielectric Strength: 2000VAC for 1 minute between module output and housing Between the control power supply and the housing, 2000VAC for 1 minute |
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Zero-Cross Three-Phase Power Regulator Selection Guide
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| PAC35C- |
Input Signal: 4-24VDC Pulse Width Modulation Signal (Input impedance greater than 10K) Output Mode: Zero-Cross Power Control Soft Start: Configurable from 0.2 to 60 seconds Protection: Over-temperature alarm for heat sink Switching: Seamless transition between manual and automatic modes Compatibility: Suitable for Y-type loads with center neutral or floating, and delta-type loads Load Power Supply: 380VAC ±10%, 50/60Hz Fan Power Supply: Default 380V direct connection; for 220V control, please specify when ordering |
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Radiator unit |
Overall dimensions of the whole machine |
SCR specifications |
Load power (resistive) |
|
B125C-: 1 fan, blow-type forced air cooling. Radiator capacity: ambient temperature at 40 degrees: 60A/phase. Natural heat dissipation conditions: 10A/phase. |
L 270 x W 127 x D 212mm 2 Hole Mounting, hole diameter 8mm |
MKKT55A |
≤26KW |
|
MKKT90A |
≤40KW |
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MKKT110A |
≤40KW |
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B170C-: 1 fan, blow-type forced air cooling. Radiator capacity: ambient temperature at 40 degrees: 150A/phase. Natural heat dissipation conditions: 15A/phase. |
L 290 x W 172 x D 253mm 4 Hole Mounting, |
MKKT110A |
≤50KW |
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MKKT130A |
≤62KW |
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MKKT160A |
≤80KW |
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MKKT180A |
≤90KW |
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MKKT200A |
≤98KW |
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B210C-: 2 fans, blow-type forced air cooling. Radiator capacity: ambient temperature at 40 degrees: 220A/phase. Natural heat dissipation conditions: 70A/phase |
L 285 x W250 x D 255mm 4 Hole Mounting, |
MKKT180A |
≤92KW |
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MKKT200A |
≤100KW |
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B240C-: 2 fans, blow-type forced air cooling, Radiator capacity: ambient temperature 40 degrees: 200A/phase, Natural heat dissipation: 70A/phase. |
L 285 x W 250 x D255mm 4 Hole Mounting, hole diameter 8mm |
MKKT250A |
≤108KW |
|
MKKT300A |
≤155KW |
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B300C-: 2 fans, blow-type forced air cooling, Radiator capacity: 300A/phase at ambient temperature 40 degrees, Natural heat dissipation: 100A/phase. |
L 360 x W 246 x D 243mm 4 Hole Mounting, hole diameter 8mm |
MKKT300A |
≤160KW |
|
B350C-: 2 fans, blow-type forced air cooling, Radiator capacity: ambient temperature at 40 degrees: 350A/phase. Natural heat dissipation conditions: 100A/phase. |
L 460 x W 244 x D 283mm 4 Hole Mounting, |
MKKT500A |
≤210KW |
| unitmm | A | B | C | D | E |
| B30C | 210 | 127 | 212 | 102 | 198 |
| B125C | 270 | 127 | 220 | 102 | 247 |
| B170C | 290 | 172 | 253 | 148 | 273 |
| B210C | 285 | 250 | 255 | 222 | 268 |
| B240C | 285 | 250 | 255 | 222 | 268 |
| B300C | 360 | 246 | 243 | 222 | 343 |
| B350C | 460 | 244 | 283 | 220 | 443 |
| B400C | 477 | 304 | 295 | 280 | 455 |
| B600C | 473 | 365 | 330 | 341 | 457 |
