Q:We are a manufacturer of intelligent switching equipment manufacturers to bid in the power grid to say what is the first access to what the Department

2 please hold valid company documents to the trade and Industry Bureau for consultation!

Q:The problem of electric power equipment withstand voltageWhy does the pressure decrease when the altitude is high? The air is thin, is not easy to breakdown (vacuum breakdown is not very low atmospheric pressure)

Because of the low air pressure in the air at high altitude, at the same voltage

Q:1, common measurement and control cabinet, what is the common measurement and control cabinet? What signals are measured? High voltage side (10kV and above) have the corresponding relay protection device, regardless of the panel or on the spot, will not be on the public measurement and control cabinet; the so-called public measurement and control cabinet is measuring what? Low voltage measurement and control? Or what, for example, thank you (power generation, power supply and distribution does not matter, can speak on the line)2, network equipment cabinet, I probably can understand, is from the equipment from various communication signals collected by the communication management unit, the output signal of Ethernet, this cabinet is the main communication management machine and switch is?3, how to locate the remote communication cabinets? What is the main role? What are the main equipment?4, why do we usually need GPS time device, what is the significance? What will happen if there is no?

The common measurement and control cabinet are generally some common control signals such as AC / DC screen, knife position, device power loss and telemetry some voltage and current value, there are no specific remote control, measurement and control device of equipment access to public control

Q:What equipment are used in the power, can help to divide some of the details, as well as the type of equipment under the type of equipment

When drawing the main wiring diagram, the transformer, arrester, capacitor, neutral point equipment and carrier communication can be used to reflect the situation of power supply in normal and accident conditions. Electrical wiring is also known as the main electrical

Q:What are the necessary equipment for power line project?

First of all to have safety equipment, such as an electroscope, grounding wire, personal security line, an insulating rod, a nuclear phase device etc.

Q:1 what is the power system and the power network? 2 what is the rated voltage of the electrical equipment? Why do the power system to use a variety of voltage levels? 3

The rated voltage of the electrical equipment is the working voltage standard designed by the designer.4, the power system uses a variety of voltage levels, on the one hand is the process of historical evolution, in 50s only 35KV, in 60s with 110KV, in 70s the establishment of the 220KV power grid, and later developed to 500KV and DC transmission. On the other hand, a higher voltage level is used to further the safety and economy of transmission. Of course, the retention of 35KV and 110KV, but also taking into account the economic costs of close range transmission.

Q:The difference between electric load and power supply capacity

Power consumption / power consumption of electric equipment used for electric power load.Power supply capacity of the power supply system, generally refers to the user step-down transformer capacity, such as how many kva.

Q:Withstand voltage test, power equipment insulation unqualified reasons?

Voltage test, power equipment insulation failure may be due to: insulation deterioration. Such as transformer oil into the water, solid insulation moisture, insulation aging, etc., will lead to decreased insulation performance, in the pressure test may not be qualified.

Q:Pre checking and checking of goods in power system

That is one of the effective means to ensure the safe operation of electrical equipment. Over the years, the power sector and power equipment of large industrial and mining enterprises are basically in accordance with the rules of the preventive test of power equipment issued by former Ministry of electric power "(hereinafter referred to as the" Regulations ") requirements for testing, the timely detection and diagnosis equipment defects play an important role.

Q:Power equipment Market Overview

The first quarter of 2013, China's economic growth rate has declined, but overall still maintained at a high level, especially the power equipment of power transmission equipment and electrical equipment demand remains steady growth, thereby stimulating imports of the rapid growth of the industry; at the same time, the world economy has been warmer, the international power equipment market demand a modest recovery, I pull the power equipment China's manufacturing exports continued to grow. In the import and export growth driven by two, the first quarter of China's total import and export of electric power equipment manufacturing industry rebounded significantly.