What is the ideal motor protector?
The ideal motor protector is not the most functional, nor the most advanced, but should be the most practical. So what is reliable? Reliable first of all should meet the reliability of the function, such as over current, phase failure function must be able to operate in various occasions, various processes, various ways of overcurrent, phase failure can be reliable. Secondly, its own reliability (since the protector is to protect others, especially high reliability) must have adaptability and durability to various harsh environments.
Economical: Adopt advanced design, reasonable structure, professional and large-scale production, reduce product cost, and bring high economic benefits to users.
Convenience: It must be at least similar to the thermal relay in terms of installation, use, adjustment, wiring, etc., as simple and convenient as possible.
For this reason, experts have already predicted that in order to simplify the electronic motor protection device, the design without the power supply transformer should be designed and used, and the semiconductor should be used instead of the electromagnetic actuator with contacts. In this way, it is possible to manufacture a protective device consisting of a minimum number of components.
We know that: active will certainly bring unreliable, a normal work requires working power, and another phase failure, will certainly lose the working power, this is a contradiction that can not be overcome. In addition, it needs long-term power supply, which is easily affected by grid voltage fluctuations and large current surges. The failure rate of itself will be greatly improved. At the same time, the volume and cost will be increased. The power supply voltage level needs to be considered, which makes the use inconvenient. Therefore, the motor protection industry takes active and passive as a milestone in technological progress.
The ideal motor protector is not the most functional, nor the most advanced, but should be the most practical. So what is reliable? Reliable first of all should meet the reliability of the function, such as over current, phase failure function must be able to operate in various occasions, various processes, various ways of overcurrent, phase failure can be reliable. Secondly, its own reliability (since the protector is to protect others, especially high reliability) must have adaptability and durability to various harsh environments.
Economical: Adopt advanced design, reasonable structure, professional and large-scale production, reduce product cost, and bring high economic benefits to users.
Convenience: It must be at least similar to the thermal relay in terms of installation, use, adjustment, wiring, etc., as simple and convenient as possible.
For this reason, experts have already predicted that in order to simplify the electronic motor protection device, the design without the power supply transformer should be designed and used, and the semiconductor should be used instead of the electromagnetic actuator with contacts. In this way, it is possible to manufacture a protective device consisting of a minimum number of components.
We know that: active will certainly bring unreliable, a normal work requires working power, and another phase failure, will certainly lose the working power, this is a contradiction that can not be overcome. In addition, it needs long-term power supply, which is easily affected by grid voltage fluctuations and large current surges. The failure rate of itself will be greatly improved. At the same time, the volume and cost will be increased. The power supply voltage level needs to be considered, which makes the use inconvenient. Therefore, the motor protection industry takes active and passive as a milestone in technological progress.
