Yangshan Merchants buy pd777-8 multi-function meter Tel: Xianghu Electric Manufacturer: Hunan Xianghu Electric Co., Ltd .: 400-6733-731
q Consulting: 297-088-066
wx consulting: hnxhdq
The improvement of the economic living standard has undoubtedly led to a higher pursuit of household products such as cabinets, which has already risen from a single meeting of demand to an even higher stage of art aesthetic appreciation. Therefore, in order to adapt to the trend of the times, the cabinet industry must incorporate culture into it and establish a new brand era. The establishment of a brand is to create a product with its own characteristics, and it also represents it. Nowadays, some high-end cabinet brands have already tried to make consumers like the brand itself. The society is developing and progressing, and consumer demand is constantly upgrading and updating. The current packaging culture trend of the cabinet industry is the reason why brands are seeking to meet consumer demand, especially how to meet the spiritual level of high-end consumer groups. Demand is becoming a trend in the development of the cabinet market.
Xianghu Electric Co., Ltd. production: pd777-8 multimeter contact phone rey-ii40 / 4p / 40a
Choose according to the purpose of use and the place where the electrical equipment is located
The overall market dynamics of 100g optical fiber With the development of the global network communications industry, cloud computing technology has become more mature, and data transmission volumes have increased rapidly. Therefore, telecommunications companies have actively introduced 10g / 40g optical division wave multi-tasking networks. The scale of the optical fiber market is gradually expanding. It is expected that by 2016, the global 100g wavelength divider (wdm) linecard scale will reach 1.8 billion US dollars, exceeding the existing 10g and 40g market scale. On the other hand, telecommunications companies are actively testing 100g networks, and related equipment manufacturers, fiber optic chips, and the entire industry chain have also begun to move towards 100 products.
1) Protection against direct contact with electric shock. The danger of direct contact with electric shock is large and the consequences are serious. Therefore, a more sensitive leakage circuit breaker should be selected. Power tools, mobile electrical equipment and temporary lines should be installed in the circuit. Residual current circuit breaker with a current of 30ma and an operating time within 0.1s. For residential dwellings with a large number of household appliances, install them behind the household energy meter. If an electric shock easily causes secondary injury (such as working at heights), a leakage circuit breaker with an operating current of 15ma and an operating time within us should be installed in the circuit. For electrical equipment in China, a leakage circuit breaker with an operating current of 6ma and an operating time within us should be installed.
Experts said that the concentration of the mold industry park can not only promote the development of the mold industry, but also have a certain positive effect on getting rich local people. At the beginning of 2013, the Machine Tool Industry Association released an analysis report on the economic performance of the industry in 2012. As soon as this data came out, it was hotly debated in the industry, because this number would be significantly different from the actual body of the enterprise. In 2012, the machine tool industry experienced a low tide that has never been seen in a decade. Although everyone cannot tell the situation of the entire industry, the situation of listed companies in the industry can be described as a loss. According to the data disclosed by listed companies, most listed companies have experienced severe recession, with a general decline of more than 30 and a serious decline of 90.
2) Indirect contact electric shock protection Indirect contact electric shock in different places can cause different degrees of injury to the human body. Therefore, different places should be installed with different leakage circuit breakers. In places where the danger of electric shock is relatively large, it is required to use a leakage circuit breaker with high sensitivity. The danger of electric shock is much greater in wet places than in dry places. Generally, an earth leakage circuit breaker with an operating current of 15-30ma and an operating time within 0.1s should be installed. For electrical equipment in water, action should be installed. Leakage circuit breaker with a current of 6-10ma and an operating time within us. For electrical equipment where the operator must stand on a metal object or inside a metal container, as long as the voltage is higher than 24v, an earth leakage circuit breaker with an operating current of 15ma or less and an operating time within us should be installed. For fixed electrical equipment with a voltage of 220v or 380v, when the shell ground resistance is below 500fz, a single unit can be installed with a leakage circuit breaker with an operating current of 30ma and an operating time within 0.19. For large electrical equipment with a rated current of more than 100a or a power supply circuit with multiple electrical equipment, an earth leakage circuit breaker with an operating current of 50--100ma can be installed. When the grounding resistance of the electrical equipment is below 1000, it can be installed Residual current circuit breaker with an operating current of 200-500ma.
Yangshan Merchants buy pd777-8 multi-function meter Contact phone: Xianghu Electric pd777-8 multi-function meter
In order to give full play to the innovative power of the enterprise, the Mechatronics Group proposes an innovation-driven development path of independent research and development, joint development, introduction of absorption, digestion and improvement. This, first of all, needs to create an innovative environment within the group. In 2014, the Mechanical and Electrical Group held the first scientific and technological progress since its establishment, and proposed to create an innovative industrial group, establish a new mechanism for assessing and encouraging scientific and technological innovation in the group, and commend innovation collectives and individuals with millions of yuan. This year, the Mechanical and Electrical Group held the second session of technological advancement, launched 20 key projects of technological innovation, implemented these projects to each enterprise and management team, and signed technical innovation responsibility certificates with the enterprise.
Select based on the normal leakage current of the circuit and equipment
1) Single-use leakage circuit breaker. The operating current should be greater than 4 times the leakage current during normal operation of the device.
2) Leakage circuit breakers for branch lines, the operating current should be greater than 2.5 times the leakage current during normal operation of the line, and also greater than 4 times the leakage current of the electrical equipment in the line.
3) The operating current of the main circuit or the earth leakage circuit breaker of the total protection should be 2.5 times greater than the leakage current during normal operation of the power grid. If it is not easy to measure the leakage current of the line or electrical equipment, it can be estimated according to the following empirical formula: lighting circuit or residential electrical circuit: operating current of the leakage circuit breaker idz>; isj / 2000; hybrid power and lighting circuit: leakage Circuit breaker operating current idz>; isj / 1000. In the formula, idz is the operating current of the leakage circuit breaker, and isj is the current in the circuit.
1) Electrical equipment powered by single-phase 220v power supply should use two-pole two-wire or single-pole two-wire leakage circuit breakers.
2) Electrical equipment powered by three-phase three-wire 380v power supply should use three-pole four-wire or four-pole four-wire leakage circuit breakers.
Yangshan Merchants buy pd777-8 multi-function meter
Notes on editing and installation
1. Before installation, check whether the data on the leakage circuit breaker nameplate is consistent with the requirements for use.
2. Do not install too close to the high-current bus bar and AC contactor.
3. When the operating current of the earth leakage circuit breaker is greater than 15ma, the equipment enclosure it protects must be reliably grounded.
4. Full consideration should be given to the power supply mode, voltage of the power supply line and the grounding system of the system.
5. To install the earth leakage circuit breaker with short circuit protection, you must ensure that there is a sufficient arcing distance.
6. The control circuit externally connected to the combined leakage circuit breaker shall use copper wires with a cross-sectional area of not less than 1.5m㎡.
7. After installing the leakage circuit breaker, the original low-voltage line or the original ground protection measures of the equipment cannot be removed, and the neutral line on the load side of the circuit breaker must not be shared with other circuits to avoid malfunction.
8. During installation, the neutral line and the protective ground line must be distinguished strictly. The neutral wire of the three-pole four-wire and four-pole leakage circuit breakers should be connected in the circuit breaker. The neutral wire passing through the circuit breaker can no longer be used as a protective ground wire, nor can it be repeatedly grounded or connected to the electrical equipment shell. The protective earth wire must not be connected to the earth leakage circuit breaker.
9. The protection scope of the earth leakage circuit breaker shall be an independent circuit, and it shall not be electrically connected to other circuits. Earth leakage circuit breakers cannot be used in parallel to protect the same line or electrical equipment.
10. After the installation is completed, the test button should be operated to check whether the earth leakage circuit breaker can operate reliably.
Yangshan Merchants buy pd777-8 multi-function meter
In terms of accessories alone, the appearance of the bulb lamp has been finalized, and plastic-clad aluminum can pass through the high-end market, while the low-end market continues to run with a full plastic bird cage structure; in terms of downlights, ceiling lamps, etc. Plastic heat dissipation products and industry recognition. Fourth, in terms of channels, the advantages of traditional channels have been declining since 2015, and coupled with the rapid development of Internet marketing, e-commerce channels may or may surpass traditional channels and stand on the platform's first year. In the past, most licenses were operated by enterprises, and traditional channels accounted for 80%. However, in 2015, licenses operated by enterprises, e-commerce or o2o models will achieve breakthrough growth, or grow at 40p, or double, and there will even be some licenses. Rely on e-commerce channels to become famous.
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Keywords: Low-voltage electrical appliances - Instrumentation - Circuit breakers - Switching appliances - Transformers