0102030405
High voltage soft start state cabinet
Products Details
High voltage soft start state cabinet is mainly suitable for (3~10kV) squirrel cage asynchronous motor start and stop control and protection. The high quality anti-parallel thyristor components and electronic control equipment are connected between the stator winding of the high voltage motor and the power supply. When the motor starts, according to a certain law (such as constant current or voltage slope) control the conduction fish of the interproduct tube, and continuously change the input of the stator final group of the motor from pressure to full pressure, after the start is completed, the bypass contactor is drawn. It has the function of fault protection such as over-cut, short-phase starting, peak overcurrent, etc. Using it can effectively avoid the harmful impact caused by excessive motor starting current to the power grid, and can normally use high-power motor under limited power grid capacity and extend its service life. In addition, High voltage soft start state cabinet also has a “soft stop” function, when soft stop, the motor stator winding voltage will be smoothly reduced, thus avoiding the sudden stagnation of the equipment, which is useful for the pump (can avoid the effect of water hammer) or conveyor belt.
1. Small size and full functions
The wooden cabinet integrates the high-voltage solid-state soft-start cabinet, high-voltage switch cabinet, and bypass cabinet into an integrated cabinet. It is small in size. Compared with a separate high-voltage switch cabinet and a teaching cabinet,
The starting cabinet area is reduced by half, and it also has the functions of soft start, soft stop, switch cabinet and bypass cabinet.
2. The starting current is small and the energy saving effect is significant
The medium- and high-voltage switch solid-state soft-start integrated cabinet adjusts the voltage by changing the conduction angle of the thyristor, without energy loss and starting current.
Small, 2.5~3.5 times the rated current.
3. Strong anti-interference ability, adaptable to various usage environments
This cabinet is designed with a special resistance-capacitance absorption circuit, which has strong anti-interference performance. The product performance is stable, not affected by the ambient temperature and geographical location, and can be started frequently.
4. Comprehensive protection functions and high security
It has fault protection functions such as overload, phase loss, and starting peak overcurrent. The starting parameters are optional, adjustable and controllable.
5. Maintenance-free, cost saving
The maintenance-free design reduces the wiring cables of high-voltage switch cabinets and soft-start cabinets. No other maintenance is required after being put into use, which can save a lot of money in maintenance costs.
Basic parameters
| Voltage | 3~10kV(11kV Motor requires special design) |
| Power | 200~15000kW(Above 5000kW special custom cabinet sizes are required) |
| Starting Current | 2.5~3.5 times rated current |
| Starting Pressure Drop | With bypass contactor＜3V |
| Starting Time | 0~120s adjustable |
| Starting Frequency | Frequent start-up possible |
| Start-up Method | Current limiting starts；Voltage linear curve starts; Voltage exponential curve starts; Current starts with a linear curve; Current exponential curve starts |
| Shutdown Mode | Free shutdown; Soft shutdown;Brake; Soft shutdown+Brake; Point function |
| Overload Capacity | 500% 30s 120% long-term |
| Communication Function | RS485 Port |
| Protection Grade | IP4X |
| Structure | Cabinet |
| Dimension | W*D*H:1000*1500*2300 |
| Protection function | Run Over Current Protection; Motor Thermal Overload Protection;Phase Current Unbalance Protection; Phase Loss Protection; Overheat Protection |
| Altitude | standard altitude≤1000m |
| Ambient temperature | -25 °C~+ 45 °C |
| Maximum relative humidity | 95% non-condensing |
| Mounting | Non-corrosive gas; Non-conducting dust; No violent vibration(＜0.5G);well-ventilated |
Performance characteristics
Soft starting cabinet can reduce the motor hard starting (i.e., direct starting) caused by the grid voltage drop, so that it does not affect the normal operation of other electrical equipment in the common network, can reduce the motor’s inrush current, the inrush current will cause the motor local temperature rise is too large, reducing the life of the motor, can reduce the mechanical impulse brought about by the hard starting, the impulse to accelerate the wear and tear of the transmission machinery (shafts, mesh gears) to reduce the electromagnetic interference, the inrush current will be in the form of electromagnetic waves to interfere with the normal operation of electrical instrumentation. The current will interfere with the normal operation of electrical instruments in the form of electromagnetic wave.
The soft start cabinet makes the motor can start and stop freely, reduces idling, improves the operation rate, and thus has the role of energy saving.
FAQ
1.Starting principle of high-voltage soft start cabinet.
The working principle of high-voltage solid-state soft start cabinet is to start and stop by adjusting the voltage and frequency of the motor. Contact us
2.The role of high-voltage soft start vacuum contactor.
The vacuum contactor of the high-voltage soft start cabinet is the main component switch of the high-voltage soft start cabinet, which is used for starting switching, star point shorting or rotor shorting of the high-voltage soft start cabinet. Contact us
3.The benefits of soft start motor compared to direct start motor？
Reduce the damage to the power grid caused by excessive direct starting current of the motor, extend the service life of the motor, and are widely used in the start of fans, water pump compressors, air and other equipment in the fields of steel, chemical industry, building materials, metallurgy, building materials, coal mines, and other large and medium-sized motors. Contact us
