Squirrel cage AC motor soft starter (5.5KW to 550KW)

squirrel cage motor will create big current shake when it is start in full volatege ( 5-8 times more than rated current), especially for big capacity motor, it will make big trouble for electic grid and other loaded equipment,heavily reduce the equipment service life. so, smooth start and stop is neccessory for motors.

this type starter is designed for 5.5kw-550kw squirrel cage motor

 

TYPICAL APPLICATION RANGE:

PUMP: wiht pump control function, reduce pump current water hammer brought about by the liquid current impaction at starting and stopping, save the maintenance cost of the system

 

BALL MILL: with voltage slope starting, reduces the wear and tear of the gear torque , and work load of maintenance and lengthens  the service lift

 

FAN: the solid soft starter replaces the traditional starter, reduces wear and tear and mechanical shock

 

COMPRESSOR: using current limiting , to realize smooth start and lower the motor templerature rise

 

CRUSHER: locked rotor protection and quick protection make it to avoid motor over-hearting /burning  caused by mechanical faults and block

 

CONVERYING MACHINERY: soft starting and stop control realize the smooth and gradual start process, and smooth slowing stop ,thus avoid damage caused to material and equipment by shocks

 

Successfully applied in many famous big Project and places, such as Three Georges project, national engineering designing institute, mining company, cement mill, stell mill,sugar factory,wood industry, chemical industry, city planning, and other place with big power motor and high electric consume place.

Operating principle and performance characteristics

WGQ8 intelligent starter adopts three pairs of parallel thyristor put in the stator loop of motor,use switch function of thyristor to control its touching angle with microcontroller, so as to control input voltage of the motor  to make it soft start.

when motor start is over and current of motor falls to the oridnary level, it can control bypass signals to motivate bypass switch, put the motor parallel to the power grid

 

Controllable start current: under common load condition, start current can be controlled <= rated 1.5--4A. ,reduce the start current and motor temperature increasing.

 

With strong anti-interference ability: adopt high performance microprocessor digital control,reliable working and strong anti-interference ability.

 

Human-machine interface: consist of  128X64 dot matrix character LCD, 3 signal indicators, 6 simple keyboards,. show the data directly and operate easily

 

 6 kinds of start way: voltage slop start, current-limit slope start, impulse jump start, slope steady start, steady start and point start which are applicable to all kind of loads.

 

two shut down way: SOFT SHUT DOWN and FREE SHUT DOWN. SOFT shut down characteristics can meet mechanic demands of various situation, and the time and voltage for soft shut down can be adjusted

 

Protection and monitor: it has 17 kinds of protection role: such as over/ under voltage, over/under current, overheat, overload, short circuit, open-phase, overheat, communication faults, etc. It will stock the fault data for user's analyze.

 

Analog output: 4-20mA standard analog current output

 

other working condition: no efflorescence, no inflammable and explosive, no aggressive gas ( special requirement please state when place order)