Self-healing low-voltage reactive power compensation capacitor
Technical field
The present invention relates to the electric component technical field, more particularly, relate to a kind of self-healing low-voltage reactive power compensation capacitor.
Background technology
Along with society is constantly progressive, electric, mechanization develops rapidly, commercial power constantly increases, the business electrical cost also constantly increases thereupon, obviously descending appears in the quality of electrical network, in order further to improve power grid quality and consumer electronics safety, to fall end grid electricity fee cost and consider, many enterprises begin constantly to use the self-healing reactive-load compensation capacitor; The capacitor of self-healing adopts the single-layer polypropylene film as medium, surperficial evaporation the thin metal of one deck as conductive electrode.When applying too high voltage, polypropylene screen electricity weakness is breakdown, and the breakdown point impedance obviously reduces, the current density that flows through sharply increases, and makes metallization coating produce high heat, and the metallic conductor around the breakdown point evaporates loss rapidly, form coat of metal clear area, breakdown point recovers insulation automatically.The capacitor of self-healing is divided into dry type and oil immersed type, requirement for the capacitor of self-healing is when capacitor lost efficacy, capacitor leaves from circuit interruption, danger such as can not have blast, catch fire, capacitor is always followed a large amount of heats and gas when puncturing, the pressure of capacitor shell is increased, and dry-type capacitor is because its potting compound is a solid, gas is difficult for overflowing, thereby has hidden danger on fire.Then there is the danger of leakage of oil in the oil immersed type capacitor, also can pollute electric equipment and environment simultaneously, and above-mentioned two class capacitors exist all that volume is big, the shortcoming of Heavy Weight, and the life-span of product is shorter.
Summary of the invention
The present invention seeks to that present self-healing low-voltage reactive power compensation capacitor volume is big, the shortcoming of Heavy Weight in order to solve; the life-span of product is shorter; the problem of fail safe deficiency; provide that a kind of volume is little, in light weight, it innerly has a dual electic protection self-healing low-voltage reactive power compensation capacitor; can stop the accident of fire or stream oil preferably; security performance is strong, to overcome the deficiencies in the prior art.
For solving the problems of the technologies described above, construct a kind of self-healing low-voltage reactive power compensation capacitor, comprise capacitor shell, terminal, connecting line, metallized film, connecting line splicing ear and metallized film, in the capacitor shell, establish plate in the iron, at metallized film outer wrapping insulating barrier, in the capacitor shell, fill inert gas.
Above-mentioned self-healing low-voltage reactive power compensation capacitor is established seal between terminal and capacitor shell.
Above-mentioned self-healing low-voltage reactive power compensation capacitor, described seal is a silicon particle.
Above-mentioned self-healing low-voltage reactive power compensation capacitor, described insulating barrier are the cable paper webs.
Above-mentioned self-healing low-voltage reactive power compensation capacitor, described metallized film is a polypropylene screen.
Above-mentioned self-healing low-voltage reactive power compensation capacitor, the capacitor shell is columniform.
Compared with prior art, the present invention has the following advantages:
Self-healing low-voltage reactive power compensation capacitor of the present invention is by improving existing capacitor internal structure, effectively reduce the weight of capacitor and reduce certain production cost, the loss angle of this capacitor is little, good electric property, self-healing performance is good, long service life.Concrete advantage is:
1) have good self-healing performance, product is stability and safety more;
2) internal structure is simple, and radiator structure is reasonable, and product weight is light;
3) withstand voltage properties of material, temperature rise in order, radiating effect is good
4) can further enhance productivity.
Description of drawings
Fig. 1 is the structural representation of self-healing low-voltage reactive power compensation capacitor of the present invention;
Embodiment
As shown in Figure 1, in self-healing low-voltage reactive power compensation capacitor, capacitor shell 8 is aluminum hulls that radiating rate is fast, intensive performance is good, terminal is established at its top, and a heat resistant plastice terminal cap 1 is arranged on the terminal, can effectively alternate differentiation be isolated and play the effect of arc protection, three copper posts 2 are arranged on the terminal, guaranteed that capacitor contacts with external connection well, envelope has high insulating property, resistant to elevated temperatures silicon particle 9 on copper post 2, guarantees the favorable sealing property of capacitor; Copper sheet 3 is bonded together at high electric current moment copper sheet and copper post below copper post 2, when capacitor when being subjected to overcurrent, superpotential damage for a long time, this butt-joint point then plays the effect of fuse, the protection user equipment.Discharge resistance 10 connects copper sheet 3, and discharge resistance 10 selection resistive performances are good, withstand voltage properties is strong and caloric value is few.This capacitor adopts the vapour-pressure type protective device, and plate 4 is another protective devices of capacitor in the iron, effectively capacitor for voltage protection and device security; Connecting line 5 connects copper sheet 3, establish film in the capacitor bottom and roll axle center 7, be wound with thin-film component on the axle center, thin-film component is selected the polypropylene metallized film 6 of high-quality, the polypropylene metallized film 6 of high-quality has the advantages that little, the low temperature rise of good electric property, loss angle is waited until, has high-temperature resistant performance, feature that shrinkage is good simultaneously.The cable paper 11 of good insulation performance performance also is set in aluminum hull.For starting current line loss few and that reduce from the outside is consumed, capacitor internal element group is that triangle connects.This capacitor shell is columniform, makes space that product occupies still less, convenient transportation and packing.
The present invention is the packing material of capacitor with the special gas, falls end production cost, reduces the overall weight of capacitor, and product has easy for installation, advantage safe in utilization, and product is connected well with extraneous, can compensate on request.Fill inert gas in the capacitor, effectively stop the capacitor fire incident.The present invention is a benchmark with special thin-film material, has promoted the quality scale of product.
Below only be the preferred embodiments of the present invention; can not limit interest field of the present invention with above-mentioned scheme; should be understood that; for those skilled in the art; do not breaking away under the principle prerequisite of the present invention; can also make some improvement and change, these improvement and change also are considered as protection scope of the present invention.