Wenzhou Shuguang Fuse Ltd. / high-voltage fuses low-voltage fuses high-voltage fuse

Wenzhou Shuguang Fuse Ltd. (high voltage fuses high-voltage fuse fuse) spiral RL1 in Fig. (B), RL1 series screw type fuse the porcelain caps, porcelain sets, Fuse and base composition. Melting tube built with quartz sand, fuses and fuse indicator with red points. When viewed from the ceramic glass window to the fuse cap with the red dot indicator automatically it falls off, indicating fuse blown. Rated voltage AC fuse tube 500V, rated current of 2 ~ 200A. Commonly used in machine control circuit (but note up and down when installing wiring termination method). The structure is generally divided into a melt fuse holder and melt components. Fuses are connected in series in the protected circuit when the circuit current exceeds a certain value, the melt due to heat and fuse, the circuit is cut off, which play a protective role. Heat and melt through the square and continuous power is proportional to the melt current time, when the short circuit current is large, rapid warming melts immediately blown, when the circuit current value is equal to the rated current of the melt, the melt is not You will be blown. So fuses can be used for short circuit protection. Due to melt when the electrical equipment overloading by an overload current can accumulate heat, the heat when electrical equipment overload continuous melt accumulated after a certain time it can fuse, fuse it also can be used for overload protection. Common fuse shape as shown in Figure RC1A series fuse as shown in (a), it is a simple structure, the porcelain base and porcelain fuse cover two parts. Fuses screwed on porcelain cap of copper brake pad, the porcelain lid into the base use, unplug the porcelain lid can replace fuses. Due to low and wide application of the fuse easy to use, prices. RC1A series fuse is mainly used for AC 380V and below the circuit end of the line for short circuit protection and electrical equipment, in the lighting circuit overload protection may also play a role. RC1A series fuse rated current of 5 ~ 200A, but poor ultimate breaking capacity, since the fuse for the semi-enclosed structure, sound and light the fuse is blown phenomenon of explosive in the workplace should be prohibited. No packing tube fuse RM10 series as shown in (C), the fuse tube, melt and socket components. Fuse tube steel paper into both ends of brass removable cap, the inner tube of variable cross-section of the melt fuse, replace melt more convenient. RM10 series of ultimate breaking capacity fuses than RC1A improved for small-capacity power distribution equipment. There packing tube fuse RT0 series as shown in (d), the fuse tube, the melt composition and sockets, fuse tube white porcelain fuses and RM10 similar, but the inner tube filled with quartz sand, quartz sand in the melt blown When play interrupter role in the end of the fuse tube also has a fuse indicator. The fuse breaking capacity of 2.5 to 4 times higher than the same capacity RM10 type. RT0 series fuse is suitable for AC 380V and below, short-circuit current of the power distribution system, as the lines and electrical equipment short-circuit protection and overload protection. To fuse requirements are: electrical equipment in normal operation, the fuse should be blown; in the event of a short circuit, the fuse immediately; normal range of fluctuation in the current occurs (such as motor starting process), the fuse should be blown; with When electrical equipment continued overload, should delay fuse. Selection of fuses including type selection and melt rated current is determined. When you select the type of fuse, the main basis for the size of the load protection characteristics and short-circuit current. For example, for lighting and motor protection fuses, is generally considered their overload, then, we hope that the appropriate fuse melting coefficient smaller. Therefore, smaller capacity lighting circuits and motors should be used to melt the fuse RC1A series lead and zinc alloy, and a large capacity of lighting circuits and electric motor, in addition to overload, we must also consider short-circuit breaking short-circuit current capability division. If the short-circuit current is small, it can melt tin quality RCIA series or melt of zinc of RM10 series fuses. Fuse protection for low-voltage power lines workshop, generally considered short-circuit breaking capacity of. When the short-circuit current is larger, it should adopt RL1 series fuses have high breaking capacity. When the short-circuit current is relatively large, it should adopt the role of RT0 series current limiting fuses. Fuse rated voltage is greater than or equal to the rated voltage of the fuse circuit current rating should be based on load and choose. ① resistive loads or lighting circuits, these load start-up process is short, running the current relatively stable, generally based on the load current rating of 1 to 1.1 times the rated current choice of a melt, and then select the fuse rated current. ② motors and other inductive loads, such load starting current is 4 to 7 times the rated current, generally choose the melt is rated at 1.5 to 2.5 times the rated motor current. Thus in general, the fuse is difficult to play the role overload, but only as a short-circuit protection, thermal overload relays job application. For more than one motor, requiring multiple IFU≥ (1.5 ~ 2.5) INMAX + ΣIN where IFU-- melt rated current (A), the maximum rated INMAX-- a motor current (A) ③ To prevent leapfrog fuse , on the lower level (power dry, leg) between the fuse should have good coordination and for this purpose the upper level (supply mains) fuses melt rated current ratio to the next level (power leg) large 1 ~ 2 differential. Wenzhou Shuguang Fuse Co., Ltd. is specialized in various fuse product development, production and sales. The company since its inception, always adhere to the "science and technology, quality and development, customer satisfaction" policy. Continue to develop innovative products. The company has advanced technology, perfect testing equipment and a high-quality team of workers, the implementation of design and development, manufacturing and after-sale service management system, in recent years, the company rapid development, economic and social benefits significantly improved, Companies continue to deepen and improve the quality management system, long-term development has always been not more than, at the same time vigorously develop new products, always attached importance to the process. Quality raw materials, sophisticated testing equipment is backed by the quality assurance system, the company's high-voltage fuse, MOA, indoor wall bushing, insulators and other products by the relevant state authorities several tests, the performance indicators are in line with relevant technical requirements, the products are exported all over the country, reliable quality assurance, selling service so that we occupy the market. The company pursues "efficiency, quality, kind, innovation, purpose and dedication to welcome customers to negotiate business and cooperation. Expertise and experience at home and abroad Wenzhou Shuguang Fuse Fuse, will provide the technology, performance and quality Best product! Your affirmation is our ultimate goal!