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Shanghai Yuexi Trade Development Co., Ltd. power regulator design concept
1、Design of the Control Board
PAC60A series: the use of digital circuit intelligent design, automatic phase discrimination, and strive for simple wiring high quality requirements, low-cost design, its function on the basis of PAC30A increases: current feedback, so that it has: constant current, overcurrent and other functions, control transformer primary side and other inductive load is better.
2、Selection of radiator
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.
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) |
Wiring required: 5 and 6 terminals of a six-wire terminal strip Voltage: 220V AC 50/60Hz，20W/pcs. 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, overcurrent 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 PWM 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 |
When the radiator is over-temperature and the current is overcurrent, it operates
Specification: 1 normally open contact, 1A 250V AC resistive |
| 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. |
| 20 |
Start/Stop Switch (External Switch) |
R1 terminal: CN1-3 terminal, RS terminal: CN1-8 terminal. |
| 21 |
ower regulation/voltage regulation/constant current switching (SW1 DIP Switch) |
When SW1-1=ON and SW1-2=ON, voltage regulation + current limiting. When SW1-1=ON and SW1-2=OFF, constant current + current limiting. When SW1-1=OFF and SW1-2=ON, cycle power regulation + current limiting. When SW1-1=OFF and SW1-2=OFF, PWM power regulation (no current limiting function). |
| 22 |
Constant current control + current limiting |
Current Limiting: Adjusted by the onboard P4 potentiometer or an external current-limiting potentiometer. |
| 23 |
Overcurrent alarm |
Adjusted by the onboard P2 potentiometer. Adjustment range: 100% to 150%. Overcurrent setting: Adjusted by the onboard P2 potentiometer. Overcurrent alarm: Alarm activates during overcurrent, and the tricolor light turns red. Response time: < 20ms. |
| 24 |
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 |
| 25 |
Insulation Insulationresistance Dielectric strength |
Insulation Resistance: |
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PAC60A Three-Phase Power Controller Selection Guide
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| PAC60A- |
Input Signal: 4-20mA (input impedance 100Ω), Output Mode: Voltage regulation or cycle power regulation. Features include soft start and shutdown upon power-up, overheating alarm for the heat sink, and seamless manual-automatic switching. Suitable for star-grounded, ungrounded, or delta-connected inductive and resistive loads, equipped with current limiting and overcurrent protection. Effectively controls silicon carbide rods, silicon molybdenum rods, heating tubes, nichrome wires, transformers, etc. If 0-10VDC or 0-5VDC input is required, 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,
Upper and lower mounting hole spacing:253mm, hole diameter 8mm |
MKKT55A |
≤29KW |
|
MKKT70A |
≤35KW |
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MKKT90A |
≤44KW |
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MKKT110A |
≤44KW |
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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,
Mounting hole spacing:148*273mm,
hole diameter 8mm
|
MKKT90A |
≤44KW |
|
MKKT110A |
≤54KW |
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MKKT160A |
≤90KW |
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MKKT180A |
≤92KW |
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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,
Mounting hole spacing:222*268mm,
hole diameter 8mm
|
MKKT160A |
≤92KW |
|
MKKT180A |
≤98KW |
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MKKT200A |
≤105KW |
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B240C-: 2 fans, blow-type forced air cooling, Radiator capacity: at ambient temperature 40 degrees: 200A/phase, Natural heat dissipation: 70A/phase. |
L 285 x W 250 x D255mm 4 Hole Mounting,
Mounting hole spacing:222*268mm, hole diameter 8mm |
MKKT250A |
≤115KW |
|
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,
Mounting hole spacing:222*343mm, hole diameter 8mm |
MKKT300A |
≤157KW |
|
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,
Mounting hole spacing:220*443mm,
hole diameter 8mm
|
MKKT500A |
≤210KW |
|
B400C-: 2 fans, blow-type forced air cooling. Radiator capacity: ambient temperature at 40 degrees: 630A/phase. Natural heat dissipation conditions: 100A/phase. |
L 477 x W 365 x D 330mm 4 Hole Mounting,
Mounting hole distance:341*457mm,
hole diameter 10mm
|
MKKT600A |
≤265KW |
|
B600C-: 2 fans, blow-type forced air cooling. Radiator capacity: ambient temperature at 40 degrees: 1000A/phase. Natural heat dissipation conditions: 200A/phase. |
L 473 x W 365 x D 330mm 4 Hole Mounting,
Mounting hole distance:341*457mm,
hole diameter 10mm
|
SKKT570A |
≤400KW |
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