Is it necessary to self-repiy

Update date:2017-10-08 Source:MAXGE

Recently, I have seen a lot of topics about "self-entry", and I would like to make a few comments about myself.

What is the probability that the normal grid will not have zero pressure? It is not possible to have a single overpressure for a single N year, and the maximum number of overpressure can be set up, and it is necessary to "self-reply"?

Someone said, since the compound is in order to quickly return to normal power supply, but did you come up with, if it really happens to break the zero must be larger accident, temporarily can not back to normal, discuss the overpressure "complex", it is better to discuss about the tote one-piece trip, but currently on the market the undervoltage tripping protection generally set up in 160 ~ 160 v or so, in order to avoid misoperation high power equipment is started up, the family is not recommended.

Again "double", more products on the market at present is given priority to with relay, breaking current and switching impulse current cannot too big, and its power consumption to a certain extent, large area to promote the reliability and its power consumption is a problem.

It's necessary to have a self-entry. Imagine: the voltage under pressure exceeds the rating and the electrical equipment can't work properly. The overpressure can cause the equipment to heat up or even damage the electrical appliances. After the action of the overpressure protector, the person is not at the scene or does not know when the voltage is normal, will affect the use. For example: in the morning people go to work, overowe action, if not self-reply, wait a person at night after work to go home and then hand in hand switch to send power, the refrigerator is premature?al leakage from a double meaning.

As for undervoltage, the electronic products in commonly 80 ~ 90 v can work normally, even air conditioning, voltage is too low will protect yourself, won't have too big threat for the average family, if you can not trust can choose over-voltage under-voltag


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