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| Low-voltage Electrical Market Issues 2 |
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4. Residual current operated protective devices
Residual current protection in China from the mid-1970s to develop and market application, after 80 to 90 years to promote the use of continuous improvement and development has formed a perfect variety, complete specifications of the product range of residual current protection in low-voltage power grid Security protection has played a pivotal role.
China's production of residual current protective device products of all kinds: Household and similar places with residual current circuit breaker; industrial residual current relay and residual current circuit breaker (derived by the low-voltage molded case circuit breakers, residual current circuit breaker); portable residual current protector.
Household and similar places is divided into residual current circuit breaker residual current circuit breaker with overcurrent protection and overcurrent protection without residual current circuit breaker. Country production of residual current circuit breaker with overcurrent protection models C45Vigi, DZL18-20, DZL118, DZ12L, DZ47L and K series and so on. Rated current 63A, short-circuit breaking capacity of not more than 6kA, most electronic AC type residual current circuit breaker.
Without overcurrent protection for residual current circuit breaker domestic product Product Type: DZL43 (FIN), NFIN AB62 DZL33 DZL38. Rated current below 63A, which most of the rated voltage of 220V, rated current of 30A and below the single-phase circuit using diode residual current circuit breaker, most electronic AC type, also part of the part of the electromagnetic.
The industrial residual current breaker with overload and short circuit protection, domestic production of major products Model: DZ15L, DZL25 DZ10L and DZ20L maximum nominal amount of current to 630A, rated short-circuit breaking capacity most about 20KA.
Residual current relays domestic production of the main
To Product Model: JD1, JD3 & the the LJM type used mainly in the rural areas, the LTS residual current relay, main circuit rated current capacity of up to 800A. Portable residual current protection of domestic production of the main products Model: the LBX, LBC, CL1-10 and THD10 residual current protection plug, etc., are used in a single-phase circuit, rated voltage 220V, rated current of 16A and below, the main purpose supporting the use of, and supporting the export of household appliances and home appliances. Specified in IEC standard for mobile leakage protection, only type A (AC and DC dual-use), and our most AC products.
The yield of the residual current protection in China has been able to meet the needs of national economic development, but the production stays in imitation and repeated trial, the development of new products. Part of a joint venture to introduce foreign products or the introduction of foreign technology to develop products to scale production, most of the factory annual production capacity in the millions, backward mode of production, product reliability. Residual current circuit breaker as DZ15L the mid-1970s, China developed the first generation of residual current circuit breaker, technical indicators with significantly behind similar foreign products, but still occupy the conduction status.
Market issues can not be ignored
In the above four categories of products, the low-end products, high-performance, high-end, there is less since the color characteristics of the product. The affordable products repetitive and more, such as GJ20 manufacturers nearly 200 more than 160 DZ20 circuit breaker manufacturers. This one, the intensity of competition between the low-voltage electrical giant is also evident. Chint Group , has more than 600 sales companies and special sales agency in the country and abroad to set up five branches and more than 20 distributor; Delixi Group has more than 600 domestic marketing agency, more than 30 overseas outside marketing agency.
And these sales network is still expanding. With the sinking of the electricity market in China, the "war" between the smell of gunpowder and more concentrated in these enterprises.
On the product, the single species of major products, derived specifications less and fewer attachments, it is difficult to meet the requirements of different users, product design backward, poor quality, many enterprise product standards have not been in accordance with IEC standards and national mandatory standards.
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| 12月27日（木）18:12 | コメント(0) | Economy | 管理
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| Low-voltage Electrical Market Issues 1 |
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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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| 12月27日（木）18:10 | コメント(0) | Economy | 管理
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