Intelligent Online integrated soft starter PQZR8-SP
The PQRJ8-P intelligent External bypass soft starter is a new intelligent starting device with international advanced level, which is based on microprocessing as the core, combined with technologies such as controllable silicon power drive, software and hardware protection, menu LED display, keyboard operation, torque control, and fuzzy PID closed-loop algorithm. It integrates motor soft start, soft stop, light load energy-saving, and multiple functions. This device has complete functions, stable performance, and is widely used in the start-up process of transmission equipment, fans, slurry machines, compressors, and other loads. Designed for three-phase AC squirrel-cage induction motors operating at 320V to 460V, 50/60Hz, with a rated current of 1200A or less.
Function &Parameter:
Main Circuit Operating Voltage: | AC380V(±15%) |
Main Circuit Operating Current: | 22A~1200A |
Main Circuit Frequency: | 50~60Hz (±2%) |
Soft Starting Rise Time: | 2~60s |
Soft Stop Time: | 2~60s |
Current Limiting Multiple: | 1.5~5.0 Ie (where Ie refers to rated current) |
Initial Voltage: | 30%~70% Ue (where Ue refers to rated voltage) |
Cooling Method: | Natural Cooling / Convection Cooling |
Communication Method: | RS485 Serial Communication |
Starts per hour: | ≤10 times/hour |
- Minimizes mechanical stress on the motor during startup and stopping.
- Protects the motor from damage caused by inrush currents and voltage spikes.
- Optimizes motor operation for energy savings.
- Ensures consistent and reliable performance. Simple to install and maintain.





Overload Protection
Overheat Protection
Overvoltage Protection
Load Loss Protection
Undervoltage Protection
Overcurrent Protection
Phase Loss Protection
Constant Torque Load
Ground Fault Protection
Short Circuit Protection
Stall Protection


Rated Power | 11/15/18.5/22/30/37KW | Rated Power | 45/55/75KW | Rated Power | 90/115/132/160KW | ||
Rated Current | 22/30/37/44/60/75A | Rated Current | 90/110/150A | Rated Current | 180/230/264/320A | ||
Installation Dimension | 13.3*24.9CM | Installation Dimension | 13.4*24.6CM | Installation Dimension | 19.7*37.9CM | ||
Hole intermediate distance | 9*11CM | Hole intermediate distance | 9*11CM | Hole intermediate distance | 9*11CM | ||
Mounting hole diameter | M8 | Mounting hole diameter | M8 | Mounting hole diameter | M8 | ||
Soft Starter Size | 14.5*15.7*27CM | Soft Starter Size | 14.8*16*27.5CM | Soft Starter Size | 26.1*19.4*40.2CM |

Rated Power | 185/200/220/250/280/320KW | Rated Power | 350/400KW | Rated Power | 450/500/630KW | ||
Rated Current | 370/400/440/500/560/640A | Rated Current | 700/800A | Rated Current | 900/1000/1200A | ||
Installation Dimension | 26.2*47.4CM | Installation Dimension | 26.5*51CM | Installation Dimension | 26.5*51CM | ||
Hole intermediate distance | 9*11CM | Hole intermediate distance | 9*11CM | Hole intermediate distance | 9*11CM | ||
Mounting hole diameter | M8 | Mounting hole diameter | M8 | Mounting hole diameter | M8 | ||
Soft Starter Size | 29*24.2*55.6CM | Soft Starter Size | 33*24.3*58.1CM | Soft Starter Size | 41*24.2*67CM |

It's flexible for delivery (e.g., DHL, FedEx, UPS, EMS, etc.).


We are a professional and experienced supplier of automation solution for various field.The main products includes general-purpose inverters, soft starters, and voltage regulators. These products are known for their advanced technology, comprehensive functions, stable operation, simple operation, excellent energy saving capabilities, and outstanding performance.









We provide reliable after-sales support to ensure your inverter operates efficiently. Our services include:
Technical Support: Available 24/7 for installation, troubleshooting, and operational guidance.
Warranty: Coverage for manufacturing defects and component failures.
Maintenance: Regular check-ups by certified technicians to keep your inverter in top condition.
Repairs: Quick and efficient repair services using genuine parts.
Training: User manuals and training sessions for proper operation and maintenance.
Spare Parts: Easy access to a wide range of spare parts for timely replacements.
Your satisfaction is our priority. Contact us for any assistance with your inverter.
1. Are you a trading company or manufacturer?
We are manufacturer, located in wenzhou Zhejiang Province
2. Can I get some samples?
Yes, welcome to receive sample order for testing and quality checking.
3.What's delivery time?
It usually takes about 3-5 working days for small order and 10-15 days for mass production order.
4. What's your payment terms?
T/T, L/C, Western Union.Cash.
5. What's your warranty terms?
We provide 16 months warranty for all the goods from us , and you can refund the goods with any quality problem in 15 days.
6. Do you have the products in stock?
Usually, we have standard models in stock.
7. Can I mix different power in one container?
Yes , different models can be mixed up in one container.
8. How does your factory do the quality control?
Quality is priority ,we always attach the importance to quality control from the beginning to the end of the production .every product will be fully assembled and carefully tested before packing and shipping .