Transforms in two nets, massively has used the surplus electric current movement leakage protector, several years have passed by, the fact proved, leaks the protector damage artificially, relieves the movement phenomenon to be extremely serious. Used electricity the loss question, the security uses electricity the question to be still stern. Investigates its reason is various, but the immediate cause is leaks the protector the frequency to move, resists to move, seriously affected has normally used electricity, causes the tube, to use electricity the personnel to leak the protector to lose the confidence, even gave up.

Leaks the protector the frequency to move, including two aspects:

One is when the electrical network really has the earth, leaks the protector normal movement. In this kind of normal movement, because the electrical network gets older, the climate environmental variation, the electrical network has the movement which 接地�?causes to occupy the overwhelming majority, but because the person receives an electric shock the movement which causes is few. May imagine, can normally use electricity is people's first demand, in order to prevent has the probability extremely low person to receive an electric shock the injury to incur the frequent power cut, affects the regular production and the life certainly can create people's worry.

Two is the electrical network has not originally had the earth, but is leaks the protector possibly to produce in the below situation moves by mistake:

1, because leaks the protector is the signal triggers the movement, then also can produce the signal under other electronmagetic interferences to trigger the leakage protector movement, forms moves by mistake.

2, when power switch 合闸 power transmission, can produce the impact signal to create leaks the protector to move by mistake.

3, sum of the multi- branches leakage may create jumps the ranks moves by mistake.

4, the neutral axis repetition earth possibly creates the string to flow moves by mistake.

Obviously, because leaks the protector the possibility which has these in the technology to produce moves by mistake, can cause to leak the protector the frequency to move the question seriously, is more complex.

Analyzes from the technical principle, leaks the technical erroneous zone which the protector also exists possibly produces resists to move.

1, when the neutral axis has the repetition earth, can cause to leak the protector to have the divergence to resist to move, but the neutral axis repetition 接地�?is very difficult to find.

2, when the power source lacks, 所�� happen to is leaks the protector time the work power source, can produce resists to move.

May see by the above analysis, leaks the protector the frequency which occurs in the actual use to move, resists to move the question, also has the objective environment and the management reason, also has in the leakage protector itself technology the erroneous zone. Uses the leakage protector to request the electrical network in particular 中��?to have to earth, but leaks the protector related the technical erroneous zone mostly with the electrical network 中��?earth:

First, as a result of 中��?the earth, the electrical network phase line strut year to year withstands the phase voltage, thus the strut is penetrated, forms the electrical network 接地�? creates divulges, causes the leakage protector frequency to move.

Second, as a result of 中��?earth, when the phase line occasionally earths, can produce immediately very in a big way divulges the electric current, not only increases the electricity to damage, is easy to cause the fire, can intensify leaks the protector the frequency to move.

Third, as a result of 中��?earth, when the person receives an electric shock, can produce the very big electric shock class immediately, to person's life threat extremely big, even if has the leakage protector also first suffers the electric shock, then act the protection, if the movement slow or malfunctions, the consequence can be more serious.

Fourth, as a result of 中��?the earth, the electrical network meets to the place distributed capacity in the return route, can enlarge switch 合闸 time to the place surge current, creates moves by mistake.

Fifth, because 中��?already earthed, the neutral axis had the repetition earth very difficultly to discover, the neutral axis repetition earth could cause to leak the protector to have the divergence to resist to move with the string flows moves by mistake.

Obviously leaks the protector indeed to have the technical erroneous zone, moreover these technical erroneous zones and the electrical network 中��?earth are the close correlation, when uses the leakage protector, the electrical network 中��?has no alternative but to earth, therefore in leaks the protector in the technical mentality to solve its frequency to move, resists to move the question is not greatly possible. [ Makes commentary ]