According to incomplete statistics, the amount of electricity consumed by the burning of the motor is tens of millions of degrees per year. The number of motors is out of phase, and the number of burns caused by overload is more than 3 million. As a result of the burning of the motor, more than 5,000 major safety accidents have occurred. The loss caused by the shutdown and suspension of production reached 18 million yuan. Therefore, good motor protection has the important significance of improving economic efficiency and protecting safety.
The traditional motor protection device is mainly composed of fuses and thermal relays. The fuses are mainly used for short-circuit protection. The selection of the fuse current needs to consider the starting current of the motor. Therefore, it is not advisable to use a fuse alone to protect the motor. The thermal relay is the most widely used motor overload protection device, but the thermal relay has low sensitivity, large error, poor stability and unreliable protection. This is also the case. Although many devices have thermal relays installed, the phenomenon that the motor is damaged and affects normal production is still widespread. Traditional protection devices have not yet been able to achieve mechanical wear monitoring of the motor and eccentricity monitoring of the stator and rotor.
The motor integrated protector is a product that can replace low-voltage electrical appliances such as circuit breakers, contactors, thermal relays, fuses, etc. From the perspective of the structure and function of the motor integrated protector, its series of products is not only a contactor, or Single products such as circuit breakers or thermal relays have now become a complete set of control and protection systems. The emergence of the motor integrated protector completely solves the traditional form of using discrete components. In the past, it was composed of many kinds of combinations, such as common circuit breakers or fuses + contactors + overload relays, which may have too many problems, now Can be overcome and perfected.
The ideal motor integrated protector is not very functional, nor is it advanced or good, but practical and reliable. Practical requirements should meet the requirements of reliability, economy, convenience, etc., with a high performance-price ratio. Reliable should be functionally reliable. For example, over-current and phase-off functions must be reliable for various occasions, various processes, overcurrents and phase failures in various ways. Secondly, it needs its own reliability. The motor integrated protector must have adaptability, stability and durability to various harsh environments.
The traditional motor protection device is mainly composed of fuses and thermal relays. The fuses are mainly used for short-circuit protection. The selection of the fuse current needs to consider the starting current of the motor. Therefore, it is not advisable to use a fuse alone to protect the motor. The thermal relay is the most widely used motor overload protection device, but the thermal relay has low sensitivity, large error, poor stability and unreliable protection. This is also the case. Although many devices have thermal relays installed, the phenomenon that the motor is damaged and affects normal production is still widespread. Traditional protection devices have not yet been able to achieve mechanical wear monitoring of the motor and eccentricity monitoring of the stator and rotor.
The motor integrated protector is a product that can replace low-voltage electrical appliances such as circuit breakers, contactors, thermal relays, fuses, etc. From the perspective of the structure and function of the motor integrated protector, its series of products is not only a contactor, or Single products such as circuit breakers or thermal relays have now become a complete set of control and protection systems. The emergence of the motor integrated protector completely solves the traditional form of using discrete components. In the past, it was composed of many kinds of combinations, such as common circuit breakers or fuses + contactors + overload relays, which may have too many problems, now Can be overcome and perfected.
The ideal motor integrated protector is not very functional, nor is it advanced or good, but practical and reliable. Practical requirements should meet the requirements of reliability, economy, convenience, etc., with a high performance-price ratio. Reliable should be functionally reliable. For example, over-current and phase-off functions must be reliable for various occasions, various processes, overcurrents and phase failures in various ways. Secondly, it needs its own reliability. The motor integrated protector must have adaptability, stability and durability to various harsh environments.
