亚洲色图图片区,中文字幕久热精品视频免费,色妞一区二区三区

Mine general low-voltage switchgear

This switchgear is suitable for the power supply system of the mine central control room, underground parking lot, and main ventilation passage electromechanical chamber in coal mines without gas, dust explosion and other similar mines. It is a 380V~1140V system Power, power distribution, lighting, motors and other electrical equipment receive, feed, control and protect and power conversion equipment, the switchgear is also suitable for ground substations and power supply systems in metallurgy, chemical industry, electric power and other departments.

JP outdoor integrated distribution box

JP outdoor integrated distribution box is an outdoor integrated distribution device that integrates metering, outgoing, reactive power compensation, etc. , Installed on the pole of the transformer on the household supplementary column, a new generation of ideal power distribution products for urban and rural power grid transformation.

JXF integrated distribution box

JXF integrated distribution box is suitable for three-phase three-wire, three-phase four-wire, three-phase five-wire system with 50Hz, 500V and below, load current not more than 250A, for control of power distribution system, leakage protection and motor overload, short circuit, Phase loss protection and various controls. The box has reasonable design, small size, beautiful appearance, safe and reliable use, and is widely used in metallurgy, petrochemical, medical and health, aviation, residential quarters, shopping malls, schools, and urban renovation.

XL-21 power cabinet

XL-21 power cabinet is widely used in power plants and industrial and mining enterprises. It is used for power or lighting distribution in power distribution systems such as three-phase three-wire, three-phase four-wire, three-phase five-wire and other power distribution systems below three-phase AC 500. It is installed against the wall, operated in front of the screen, and inspected in front of the screen; the box body is a fully enclosed structure, which is assembled from C profiles or 8MF profiles. A new type of rotary load isolation switch is used in the box. It can be operated with load. The front door is equipped with voltage and current indicating instruments, as well as main components such as signal lights, buttons, and transfer switches. This distribution box adopts self-designed new components, with compact structure, elegant appearance, convenient maintenance, and a variety of wiring schemes for users to choose from. It is an ideal product to replace the old XL-21 power box.

GGJ low voltage reactive power compensation device

Because the device can effectively improve the power factor of the electrical load, reduce the line loss, and improve the actual load capacity of the transformer. It has significant energy-saving effect. At the same time, the use of specific reactors in the system can also effectively prevent harmonic amplification and effectively absorb most of the harmonic currents, so that the total harmonic voltage distortion rate limit and the harmonic current content limit of each order meet the requirements. National standards to achieve the purpose of harmonic control. However, if an ordinary contactor is used to switch the capacitor bank, it will bring large inrush current, slow compensation time, high maintenance cost and short service life. Therefore, we recommend users to give priority to the following occasions. Consider using dynamic var compensation. For example, in the low-voltage power grid of industrial and mining enterprises' substations, production workshops and civil buildings, it is especially suitable for transmission and distribution systems with frequent load changes and unstable reactive power. This product complies with: GB/T15576-2008 "Low-voltage complete sets of reactive power compensation equipment", IEC60439 "Low-voltage complete sets of switchgear and control equipment" and other standards.

GGD AC low voltage fixed switchgear

GGD AC low-voltage fixed switchgear is suitable for power distribution systems with AC 50HZ, rated working voltage 380V, and rated working current up to 3150A for power users such as power plants, substations, factories and mines. for distribution and control. GGD AC low-voltage fixed switchgear is a new type of low-voltage power distribution cabinet designed according to the requirements of the competent superiors of the Ministry of Energy and the majority of power users and design departments, and based on the principles of safety, economy, rationality and reliability. The product has the characteristics of high breaking capacity, good dynamic and thermal stability, flexible electrical scheme, convenient combination, series, strong practicability, novel structure, high protection level, and can be used as a replacement product for low-voltage switchgear. GGD AC low-voltage fixed switchgear complies with EC439 "Low-voltage switchgear and control equipment", GB7251 "Low-voltage switchgear" and other standards.