Q:Why the fuse resistance is large

When the circuit fails or abnormal, accompanied by rising current, and the rising current may damage some important devices in the circuit or expensive devices, it is possible to burn the circuit or even cause a fire.

Q:How to choose a fuse

the line in the fuse at all levels of the rated current to be matched with the melt to maintain the rated current must be greater than the next level of melt rated current

Q:Fuses are generally not overloaded.

No limit measures can be taken after the load current has increased.

Q:What is the role of the circuit breaker

From the fact that the circuit breaker is a switch, it and other common switch of the main points are: 1. Applicable voltage level 2. Arc medium and way, there are vacuum, less oil, oil and sulfur hexafluoride, etc

Q:Why can not change the fuse when replacing the fuse

Fuse is to limit the current to ensure that the meter does not burn

Q:The difference between DC fuses and AC fuses

any waveform of DC does not exist in the zero, in the open DC short-circuit fault current

Q:Broken speed, which can be divided into?

European regulations fuse (VDE)

Q:Fuse always burn Is the line short circuit yet?

if the use of any of these appliances alone, it will burn insurance, that may be the electrical failure, it was caused by the professional electrical repair division to check the electrical friends

Q:When using low-voltage fuses, note that

single-phase line should be installed on the neutral line fuse; in the three-phase four-wire loop on the neutral line, the use of zero protection on the zero line is strictly prohibited fuses;

Q:What is a tube fuse

This fuse of the insulating tube if filled with quartz sand, the breaking current with a current limiting effect, can greatly improve the breaking capacity, it is also known as high breaking capacity fuse