The conventional motor soft starter will switch to bypass contactor after starting. Online motor soft starter means that after the soft starter is started, there is no bypass and there is no need to switch bypass, and the main circuit thyristor is always running online, so it is called online soft starter. Based on years of design, research, and field application experience, this three-phase on-line motor soft starter has the qualities of reliable and steady performance, small size, and high cost performance.
Main functions:
1.Effectively reduce the starting current of the motor; Can reduce the distribution capacity, avoid grid expansion investment.
2. Reduce the starting stress of motor and load equipment; Prolong the service life of the motor and related equipment.
3. Soft stopping function can effectively solve the parking surge problem of inertial systems; That is a traditional starting equipment cannot be achieved.
4.With six unique starting mode; To adapt to the complex motor and load, achieve perfect priming effect.
5.With complete and reliable protection function; effectively protect the safety of motor and related production equipment.
6. Intelligent motor soft starter, the application of network technology used motor control technology to adapt to the rapid development of electric power automation technology in the higher requirements.
Reliable quality:
1.The computer simulation design.
2. SMT production process.
3.Good EMC performance.
4.The machine before delivery on the high temperature aging, vibration test.
Perfect and reliable system protection function:
1. Protection of no voltage, less voltage and over voltage.
2.Protection of overheating and starting time too long.
3. Protection of Input phase lost, output phase lost and 3 phase unbalance.
4. Protection of starting over current, running overload, and load short circuit protection.
Maintenance function:
1.Fault self-diagnosis (short circuit, over voltage, less voltage, one phase grounded, motor overload, one phase lost, motor blocked, and intelligent software can inspect drag system working state).
2.Combination of modular design, according to the fault display content, quick troubleshooting.
Independent intellectual property products:
1.Independently software copyright.
2.Motor starting and protection proprietary technology.
3.Unique way to detect debug equipment and process.
Quick and thoughtful after-sales service:
1.Reliable performances lay the foundation of qualified service and quality.
2.Provide perfect system solution.
3.The timely and thoughtful Consulting Services.
4.Constantly improve the product performance according to user's opinion.
Item | Specification |
Power supply | AC400V±15% |
Power frequency | 50/60Hz |
Adaptive Motor | Squirrel-cage three-phase asynchronous motor |
Starting times | It is recommended not to exceed 20 times per hour |
Start Mode | 1) Current-limiting start;2) Voltage ramp start;3) Torque control +current-limiting to start;
4) Torque control +voltage ramp to start; 5) Current ramp to start; 6) Voltage current-limiting double closed-loop start; |
Scenter Mode | 1) Soft scenter;2) Free scenter; |
Protective Function |
1) Open loop protection for external instantaneous scenter terminals;2) Over-heat protection for soft starter;3) Protection for too long starting time;
4) Input open phase protection; 5) Output open phase protection; 6) Unbalanced three-phase protection; 7) Starting over current protection; 8) Running overload protection; 9) Under voltage protection for power voltage; 10) Over-voltage protection for power voltage; 11) Protection for fault parameter setting; 12) Load short circuit protection; 13) Auto restart or incorrect wiring protection; 14) Incorrect wiring protection of external control scenter terminals; |
Protection Class | IP00,IP20 |
Cooling Pattern | Natural wind cooling |
Place to be used | Indoor location with good ventilation free from corrosive gas and conductive dust. |
Environment Condition | Below 2000M. Rise the rate power when the altitude is more than 2000M.Ambient Temperature -25+45°CAmbient Humidity 95%(20°C±5°C)
Vibration<0.5G |
Model | Power | Current | Rated voltage |
(kW) | (A) | (V) | |
NKR-LN-4037 | 18.5 | 37 | 400 |
NKR-LN-4044 | 22 | 44 | |
NKR-LN-4060 | 30 | 60 | |
NKR-LN-4075 | 37 | 75 | |
NKR-LN-4090 | 45 | 90 | |
NKR-LN-4110 | 55 | 110 | |
NKR-LN-4145 | 75 | 145 | |
NKR-LN-4175 | 90 | 175 | |
NKR-LN-4220 | 110 | 220 | |
NKR-LN-4250 | 132 | 250 | |
NKR-LN-4300 | 160 | 300 | |
NKR-LN-4370 | 200 | 370 | |
NKR-LN-4470 | 250 | 470 | |
NKR-LN-4570 | 315 | 570 | |
NKR-LN-4720 | 400 | 720 |
The loading | Voltage ramp start time(s) | Voltage ramp scenter time(s) | Initial voltage | Voltage ramp (Current limit) | Current limitto start |
Bill mill machine | 20 | 6 | 60% | 400% | 350% |
Fan | 26 | 4 | 30% | 400% | 350% |
Centrifugal | 16 | 20 | 40% | 400% | 250% |
Piston compressor | 16 | 4 | 40% | 400% | 300% |
hoister | 16 | 10 | 60% | 400% | 350% |
Stirring machine | 16 | 2 | 50% | 400% | 300% |
Breaker | 16 | 10 | 50% | 400% | 350% |
Screw compressor | 16 | 2 | 40% | 400% | 300% |
Rotating conveyor | 20 | 10 | 40% | 400% | 200% |
Light load | 16 | 2 | 30% | 400% | 300% |
Convey belt | 20 | 10 | 40% | 400% | 250% |
Heat pump | 16 | 20 | 40% | 400% | 300% |
Online motor soft starter can be widely used as blew:
● Pump: make use of the soft stop function to relieve the influence of water hammer so as to save the system maintenance cost.
● Ball mill: make use of the voltage ramp startup to reduce gear torque friction so as to save cost and time.
● Fan: reduce the belt friction and mechanical conflict to save maintenance cost.
● Conveyor: make use of the soft start to realize smooth and gradual startup process in order to avoid product move and liquid overflow.
● Compressor: use limited current to realize smooth start-up, decrease heat from motor and prolong device life.
1. ODM/OEM service is offered.
2. Quick order confirmation.
3. Fast delivery time.
4. Convenient payment term.
At present, the company is vigorously expanding overseas markets and global layout. We are committed to becoming one of the top ten export enterprises in China’s electrical automatic product, serving the world with high-quality products and achieving a win-win situation with more customers.