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Low-voltage Electrical Market Issues Can't Be Ignored
1. Universal Circuit Breaker
China's current production of universal circuit breaker can be divided into three grades:
First gear products DW10 (single function, supplies, consumption of silver by the inclusion of eight ministries and the elimination of outdated products directory) DW16 (expected to completely replace DW10), which is characterized as the representative of the layout, fixed-mounted, side handle operation simple structure, easy maintenance, cheap, general industrial system for selective protection is not required, or the vast rural distribution system.
The second tranche of DW15, ME (DW17) representatives, as well as AE, 3WE, AH and other products. This file is suitable for general industrial system. Circuit Breaker, about 60% of the market share.
The third tranche Products DW45, M Series, DW40, F, products. This file product is suitable for large capacity power distribution system, focus on engineering , high-rise hotel, office building, the largest city substation . The current market share of only 3%.
2. Molded Case Circuit Breakers
Molded case circuit breaker according to their main purpose is generally divided into two categories: one main distribution protection, a motor protection circuit breaker.
China's current production distribution molded case circuit breaker DZ10 has been included in the 16 batches of elimination products DZ15, DZ20, TO, TG, H series and other products. Group product upgrading and the introduction of foreign technology manufacturing products of the late 1970s to the mid-1980s, compared with DZ10 products, which is characterized by the breaking capacity improved significantly, significantly reduced the volume, relatively complete variety of specifications, such as DZ20 series C ( economic type), Y (general), J (higher), G (high breaking type), also derived from the quadrupole and no arcing products.
After the 1990s, the producers of molded case circuit breakers with reference to foreign 1980s a number of new products developed or imitation. More prominent CM1 molded case circuit breakers, Changshu Switchgear Factory developed its main features is that breaking capacity to further improve the learning arc distance reduced, the volume is also significantly reduced, and the producers of such products has reached 10.
The mid-1990s, Shanghai Electrical Apparatus Research Institute and other units to track foreign new technologies and products, at the same time learn from the achievements DZ20 secondary development, development of a new generation of high-performance, miniaturized molded case circuit breakers.
Motor protection circuit breaker products the DX5-20, M611, 3VE1, DZ35-25 and other products. DZ5-20 is a product of the mid-1960s to design bulky, technical and economic indicators lag behind, the maximum rated current of 20A, control motor power 10kA, Rated short-circuit breaking capacity of 15kA, in addition to the built-in auxiliary contacts without any attachments. M611 and 3VE1 of the 1980s, the introduction of foreign technology manufacturing, performance indicators than DZ5-20 step and has a wide range of accessories, but not high breaking capacity, technical indicators relative to the current international level is relatively backward. DZ35-25 is the tracking of the foreign new product development in China from 1994 to 1995, a new generation of motor protection circuit breaker, rated current of 25A, the control motor power 12.5kA, rated short-circuit breaking capacity 3kA/380V alternative DZ5-20 So far, not mass production capability.
3. AC contactor
AC contactor in the control of electrical products, contact our production mainly include air type AC and DC contactors, vacuum contactor. Air AC contactor including rotary contactors, direct-acting contact, there is a direct-acting contact derived switching capacitor contactors. Production of the largest empty direct acting AC contactor such products in addition to the current products CJ20, B, 3TB, LC1-D CJ10 has been included in a batch of 16 out product, its market share of approximately 50% (as calculated by the output value of about 70%). CJ20 national unified design products, and the rest of the 1980s, the introduction of foreign technology manufacturing products. Overall technical level, equivalent to the international level early 1980s.
At present, China is developing a new generation of AC contactor, which CJ40 has to complete the 63,80,100,125,160,200,250,315,400,500 ten current levels, the maximum capacity of 800A, a new generation of small capacity contactor is also being developed.
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