High Voltage limit Current Fuse For Voltage Transformer Protection
High Voltage limit Current Fuse For Voltage Transformer Protection. Limiting fuses and current limiting resistor into the arc reactor transform limiting. Limiting resistor in the circuit so that the current value is limited to a certain amplitude less. Whether or not a short circuit will not exceed a certain value. There are two limiting fuses melt structures, one-line melt, melt in a spiral wound. Arc reactance increases with elongated arc after arc melt line. And gradually changing the phase. Melt the use of helical spiral reactance change phase transformation. Both create a zero off the voltage, current, while the zero crossing. In the current phase peaked forward to extinguish the arc. This time to extinguish the arc flow capacity is a big difference. Seen in the power supply design must consider the type and structure of the filter limiting fuses. To limit the peak short-circuit current limiting fuses fuse is called. Good job of limiting fuses only half wave. Otherwise it is difficult limiting fuse breaking.
Melt the use of metallic conductors as a series in the circuit when an overload or short-circuit current through the melt, because of its self-heating and fuse, thus breaking an electrical circuit. Fuse simple structure, easy to use, widely used in power systems, various electrical equipment and household appliances as a protective device.
Feature
Melt fuse rated current is not equal to the rated current, rated current melt equipment to be protected by the load current selection, melt the fuse current rating should be greater than the rated current, with the main electrical fit OK.
Fuses mainly from the melt, housing and bearing three parts, which are the key elements to control the melt fusing characteristics. Material, size and shape determine the melt fusing characteristics. Melt material is divided into two types of low melting point and high melting point. Low melting point materials such as lead and lead alloys, it is easy to fuse the low melting point, due to its greater resistance, it made a larger cross-sectional dimensions of the melt, fuse metal vapor produced when more capacity is only applicable to low-scoring off the fuse devices. Refractory material such as copper, silver, high melting point, is not easily blown, but because of its lower resistivity, the melt can be made smaller than the cross-sectional dimension of low melting point, low fusing metal vapor produced when applied to high breaking fuse capacity. Melt into filamentous shape and banded two. Tapered shape change can significantly alter the fuse characteristics.
Fuse with anti- delay characteristics, namely overload current hour, long operating time; Overload current large, fusing time is short. So, in a certain overload current range, when the current returns to normal, the fuse is not blown, you can continue to use. There are various blown fuse characteristic curve can be applied to the needs of different types of protected objects.
Zhejiang Xiya Electric Equipment Co., Ltd. Was founded in 1995, invest about more than RMB 10 million, one of the high-tech enterprise of production, sales, research and development. The company covers a land area of 5 acres. We are specialized in manufacturing dropout fuse cutout, zinc oxide arrester, isolating switch, lightning protection insulator, composite insulator, bushing and surge protector and complete sets of products. Our company has been elected to Two-Net reconstructing enterprise by Nation Economy & Trade Committee.
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