GV2ME series motor protective circuit breaker

Motor protector is to protect the motor, the motor is overload, lack of phase, short circuit, short circuit, over voltage, under voltage, leakage, three phase unbalance, overheating, bearing wear, stator rotor eccentricity, to alarm or protect the device.
Common types of motor protectors
1, thermal relay: Ordinary small capacity AC motor, working condition is good, there is no frequent starting and other bad conditions of the situation; because of poor accuracy, reliability can not be guaranteed, not recommended.
2, electronic type: detection of three-phase current value, the whole set current value of potentiometer or pull off code switch, circuit is generally used in analog mode, the use of anti time limit or time limit for work. Protection functions including overload, lack of phase, blocking, etc., the type of failure to use the indicator light shows that the operation of the use of digital tube display.
3, intelligent: detection of three-phase current value, the use of single-chip microcomputer, to achieve the motor intelligent integrated protection, set protection, measurement, communication, display as one. The setting current adopts digital setting, operation panel button to operate, the user can according to the specific circumstances of the motor in the field of various parameters correction setting; the use of digital tube as display window, or the use of large screen LCD display, can support a variety of communication protocols, such as ProfiBUS, ModBUS, etc., the price is relatively high, for more important occasions; high voltage motor protection are the use of intelligent protection device.
4, thermal protection: in the motor of the buried thermal element, according to the motor winding temperature of the motor, the protection effect is good, but the motor capacity is large, need to use the current monitoring type, to avoid the temperature of the motor when the temperature rises sharply, due to the delay of the temperature measurement element, resulting in motor winding damage.
5, magnetic field temperature detection: in the motor of the magnetic field detection coil and temperature measurement element, according to the motor internal rotating magnetic field changes and temperature changes in the protection, the main functions include overload, plugging, lack of phase, over heat protection and wear monitoring, protection function is perfect, the need to install magnetic field detection coil and temperature sensor.