Principle of leakage protector
The state in order to regulate the correct use of leakage protector, has promulgated the "leakage protector safety supervision regulations" (labor security word (1999) 16) and "leakage protector installation and operation (GB13955-92) and a series of standards and regulations.
Based on these standards and regulations, we should follow the following main principles in the selection of leakage protector:
1. Purchase of leakage protector should be purchased with the production qualification of the manufacturer's products, and product quality testing. Here to remind you: the market sales of leakage protector a lot of substandard products. October 28, 2002, the State Administration of Quality Supervision, Inspection and Quarantine announced leakage protector product quality sampling results, there are about 20% of the products are unqualified, and its main problems: some can not be normal breaking short-circuit current, eliminating the fire hazards; some can not play a role in the protection of the person electrocuted; there are also a number of should not be tripped trip, affecting the normal use of electricity. Impact on the normal use of electricity.
2. Should be based on the scope of protection, personal equipment safety and environmental requirements to determine the leakage protector supply voltage, operating current, leakage current and action time and other parameters.
3. The power supply using leakage protector for hierarchical protection, should meet the upper and lower switching action selectivity. Generally on the level of leakage protector rated leakage current is not less than the next level of leakage protector rated leakage current, so that both sensitive protection of personal and equipment safety, but also to avoid overstep trip, reduce the scope of the accident check.
4. Hand-held power tools (in addition to Class III), mobile household appliances (in addition to Class III), other mobile electromechanical equipment, as well as electrical equipment with a greater risk of electrocution, must be installed leakage protector.
5. Construction sites, temporary lines of electrical equipment, should be installed leakage protector. This is the "construction site temporary electricity safety technical specifications" (JGJ46-88) in the clear requirements.
6. Institutions, schools, enterprises, residential buildings within the socket circuit, hotels, restaurants and guest houses in the guest room socket circuit, must also install leakage protector.
7. Installed in the water supply lines and equipment, as well as humidity, high temperature, metal occupancy coefficient and other conductive places, such as machining, metallurgy, textiles, electronics, food processing and other industries, as well as boiler rooms, pump rooms, canteens, bathrooms, hospitals, etc., must be protected by leakage protector.
8. Fixed-line electrical equipment and normal production workplace, should be used with leakage protector power distribution box. Temporary use of small electrical equipment, should be selected leakage protection plug (seat) or socket box with leakage protector.
9. leakage protector as a direct contact protection supplemental protection (can not be the only direct contact protection), should be selected with high sensitivity, fast-acting leakage protector.
General environmental selection action current does not exceed 30mA, action time does not exceed 0.1s., these two parameters to ensure that the human body if electrocuted, will not make the electrocuted person to produce a pathophysiological danger effect.
In the bathroom, swimming pool and other places leakage protector rated action current should not exceed 10mA.
In the electric shock may lead to secondary accidents in the occasion, should be used for rated action current of 6mA leakage protector.
10. For electrical equipment that does not allow power outages, such as public **** place of passageway lighting, emergency lighting, power supply for fire-fighting equipment, power supply for burglar alarms, etc., should be used to alarm leakage protector connected to the sound and light alarm signals, notify the management staff to deal with the problem in a timely manner.
Leakage switch brand recommendation
Schneider
Schneider Electric (China) Co., Ltd. began in 1920 in France, the world's top 500, the world's energy efficiency management experts, the world's leading brand of power distribution equipment, the electrical field of the famous manufacturers
Global energy efficiency management experts Schneider Electric for more than 100 countries, energy and infrastructure, industrial, industrial and commercial facilities, and the world's most famous manufacturer
Global energy efficiency management experts Schneider Electric for the more than 100 countries, energy and infrastructure, industrial, commercial and industrial facilities. Schneider Electric, a global expert in energy efficiency management, provides total solutions for the energy and infrastructure, industrial, data center and network, building and residential markets in more than 100 countries, with world-leading positions in energy and infrastructure, industrial process control, building automation, and data center and network markets, as well as strong market capabilities in residential applications. Dedicated to providing customers with safe, reliable and efficient energy, Schneider Electric generated sales of 19.6 billion euros in 2010 and employs 110,000 people. Schneider Electric is here to help you make the most of your energy!
ABB
ABB (China) Co., Ltd, the top ten brands of electrical equipment, the world's top 500 enterprises, the global power and automation technology leader in the field, to participate in the construction of key national projects of large multinational corporations, is committed to providing solutions for customers in the industrial and electric power industry
ABB Group is ranked among the world's top 500 enterprises, the group's headquarters is located in Zurich, Switzerland. Headquartered in Zurich, Switzerland, ABB was founded in 1988 as a result of the merger of two international companies with a history of more than 100 years: the Swedish company ASEA and the Swiss company BBCBrownBoveri. Founded in 1883 and 1891, respectively, ABB is a leader in power and automation technologies that help power, utility and industrial customers improve their performance while reducing their negative impact on the environment.The ABB Group operates in more than 100 countries around the world, employs 130,000 people, and had sales of $32 billion in 2010.
The ABB Group is the world's leading supplier of power and automation technologies, and is the world's leading supplier of power and automation technologies.
CHENGTAI CHNT
Zhejiang Chint Electric Appliances Co., Ltd, the core holding company of Chint Group, founded in 1984, is a listed A-share company mainly engaged in low-voltage electrical appliances, and a leading enterprise of industrial electrical appliances and new energy
Zhejiang Chint Electric Appliances Co. It is also the largest enterprise in China's low-voltage electrical appliances industry in terms of production and sales volume. The company specializes in the research, development, production and sales of more than 100 series and 10,000 specifications of low-voltage electrical appliances, including power distribution appliances, control appliances, terminal appliances, power supply appliances and power electronics. The company won the National Quality Management Award, the first Zhejiang Provincial Government Quality Award, the first Wenzhou Mayor's Quality Award, and was successfully listed on the Shanghai Stock Exchange on January 21, 2010, becoming China's first A-share listed company with low-voltage electrical appliances as its main business.
Understanding the principles of leakage protector selection you will certainly help in the selection of leakage protector.