The motor protector adopts modular structure design, which separates the main controller from the display operation module, and can choose whether to use the display operation module according to actual needs, which can replace the traditional molded case circuit breaker (only the knife fuse switch can be used), heat Relays, current transformers, various signal lights, ammeters, high current buttons (signal buttons only), a large number of intermediate relays and time relays, transmitters, PLCs and other components. It is an ideal product for motor protection in petroleum, chemical, coal, electric power, metallurgy, municipal and other industries.
The choice of motor protector type under motor operating conditions:
1. For single-machine independent operation motor with low requirements on working conditions, simple operation control and no impact on production, ordinary type protector can be used. Because of the simple structure of ordinary protector, it is convenient to install and install wiring and replace it on site. , with cost-effective features.
2, for the harsh working conditions, high reliability requirements, especially for motors involving automated production lines, should use high-end, full-featured intelligent motor protectors.
3. For explosion-proof motors, eccentricity due to bearing wear may cause high temperature friction at the explosion-proof gap, which may cause explosion hazard. The wear status monitoring function should be selected. For special equipment such as large-capacity high-pressure submersible pumps, due to the difficulty in inspection and maintenance, the wear condition monitoring function should also be selected, and the temperature of the bearing should be monitored to avoid major economic losses caused by broom accidents.
4. For protectors with explosion-proof requirements, according to the specific requirements of the application site, the corresponding explosion-proof motor protector should be selected to avoid safety accidents.
There are many factors related to the selection of the motor protector, such as the installation position, power supply situation, power distribution system, etc.; also consider whether to protect the newly purchased motor configuration, or upgrade the motor protection, or improve the accident motor protection. Etc.; also consider the difficulty of changing the motor protection mode and the degree of impact on production; the selection and adjustment of the protector should be considered comprehensively according to the actual working conditions on site.
The choice of motor protector type under motor operating conditions:
1. For single-machine independent operation motor with low requirements on working conditions, simple operation control and no impact on production, ordinary type protector can be used. Because of the simple structure of ordinary protector, it is convenient to install and install wiring and replace it on site. , with cost-effective features.
2, for the harsh working conditions, high reliability requirements, especially for motors involving automated production lines, should use high-end, full-featured intelligent motor protectors.
3. For explosion-proof motors, eccentricity due to bearing wear may cause high temperature friction at the explosion-proof gap, which may cause explosion hazard. The wear status monitoring function should be selected. For special equipment such as large-capacity high-pressure submersible pumps, due to the difficulty in inspection and maintenance, the wear condition monitoring function should also be selected, and the temperature of the bearing should be monitored to avoid major economic losses caused by broom accidents.
4. For protectors with explosion-proof requirements, according to the specific requirements of the application site, the corresponding explosion-proof motor protector should be selected to avoid safety accidents.
There are many factors related to the selection of the motor protector, such as the installation position, power supply situation, power distribution system, etc.; also consider whether to protect the newly purchased motor configuration, or upgrade the motor protection, or improve the accident motor protection. Etc.; also consider the difficulty of changing the motor protection mode and the degree of impact on production; the selection and adjustment of the protector should be considered comprehensively according to the actual working conditions on site.
