By converting the electric power system voltage, the received

Power systems, power plants will be a natural primary energy into electrical energy, electricity users to the distant power transmission, power transmission lines in order to reduce losses and line impedance voltage drop, the voltage needs to be increased;  air circuit breaker  users in order to meet safety needs, but also lowers the voltage, and assigned to each user, which can increase and reduce the voltage required, and distribution of electric energy to the substation. So  electric meter  power system voltage through its transformation, acceptance and distribution of electric energy electrical device, which is linked power plants and power users of the intermediate links, through the voltage level of the substation will be linked to the grid, substations the role of the voltage conversion, transmission and distribution of electric energy. By the power transformer substation, power distribution equipment, secondary systems and the necessary ancillary equipment components.

Transmission lines according to the structure can be divided into overhead transmission lines and underground transmission lines

Transmission lines according to the structure can be divided into overhead  air circuit breaker  lines and underground power lines. Former by the line towers, conductors, insulators, etc., set up on the ground; latter mainly cable, laid in the ground (or water). Transmission sent by the current nature can be divided into HVDC and AC  electric meter . 1880s successfully achieved first HVDC, after due not to mention the high voltage limits (transmission capacity and the transmission voltage roughly proportional to the square) late 19th century was replaced by AC transmission. AC transmission success ushered in the 20th century, the era of electrification. Since the 1960s, the development of power electronics technology, there are new developments in HVDC and AC transmission matched to form a hybrid AC-DC power system.

The overall function of the system constituting the power

Electricity  Circuit breaker , it substation, distribution, consumption, together, constitute the overall function of the power system. By transmission, the far apart (up to several thousand kilometers) power plants and load centers linked to the development and utilization of electrical energy beyond the geographical constraints. And  mcb circuit breaker  transfer (such as coal, oil, etc.) compared to the transmission of low loss, high efficiency, flexible, easy to control, less  electric meter  pollution; transmission is also possible to connect the power plants in different locations, the implementation of peak adjustment. Transmission power utilization is an important manifestation of superiority, in the modern society, it is important that the energy arteries.

Fuel cell is hydrogen, natural gas

Today is the era of the Internet, we still have a growing demand for electricity, since we invented computers, home appliances, and more use of electricity products.  mcb circuit breaker  the continual emergence of new technologies makes electricity become a necessity.
The main methods of generation: thermal (coal and other combustible materials), solar power,  air circuit breaker  wind power technology, nuclear power, hydrogen power, hydroelectric power, etc., in the 21st century energy science for human civilization glory. Fuel cell is hydrogen, natural gas, coal gas, methanol, hydrazine fuel chemical energy directly into electrical energy in a class of chemical power. Biomass biomass energy efficient and clean use of technology is based on biomass as an energy carrier.

Today's Internet era, we still have a growing demand for electricity

Electricity is the energy as a power source of energy. Invented in the 1870s, the power of invention and application of a second off the climax of industrialization. Since the 18th century in human history, the world is one of the three scientific and technological revolution, since technology is changing the way people live. Both of today's Internet age we still have a growing demand for electricity,  electri cenergy meter  computers, home appliances, and more use of electricity products. Admittedly the continual emergence of new technologies makes electricity become a necessity. 20th century, large-scale power systems are emerging science of human  air circuit breaker  is one of the most important achievements is the generation, transmission, transformation, distribution and electricity and other aspects of the composition of electricity production and consumption systems.

IF transformer transistor radio in naming naming IF transformer

IF transformer naming method transistor radio (AM) in the IF transformer naming method consists of three parts: Part I: Lord said, with a few letters indicate the name,  Voltage stabilizer   uses. Part II: Dimensions, expressed numerically. Part III: serial number, use numerals. "1" indicates the first in the discharge frequency transformers, "2" represents the second IF amplifier circuit in the transformer; "3" and three in the IF amplifier circuit transformer models used in the primary,  mcb circuit breaker , the figures used dimensions significance would extend the scope of the standard to the power transformer and adds relevant content; right "pilot project" has been added, increasing the "state predictability pilot project", "diagnostic test projects," formed a "pilot project overhaul and requirements "chapter; this standard focuses on the state of maintenance, overhaul cycle weakens, only lists overhaul project. Overhaul in accordance with the actual situation, a selective manner; modify the original Appendix A, delete the original standard other appendices, an increase of Appendix B, Appendix C, Appendix D. Written format according to GB / T l. 1 r 600 and DL provisions plants were modified.

Internal current transformer in series with one end

Uses the output string into the current transformer wires inside an electrical equipment other end  mcb circuit breaker  circuit breakers, input connecting an ammeter in s1 s2 ammeter connected to the other end. Generated when electrical work on the ammeter current  Electric energy meter  spread through pointer display current. But at this current must be multiplied by the number of current transformer ratio is the actual value of the current work is the electrical current.

The measured size of the current selection of the current transformer rated current ratio

According to the measured size of the current selection of the current transformer rated current ratio, which is to make the current transformer primary rated current is  electric transformer  than the measured current. This is the current transformer in the selection of the most important point to note. Also pay attention to the size of the rated voltage of the current transformer, the choice and use it to line voltage to adapt.
And supporting the use of AC current transformer should be selected 5 amp ammeter range. Usually  mcb circuit breaker  with current  air circuit breaker  supporting the use of this type ammeter scale is based on the current transformer primary winding current rating scale. This marked the ammeter should be equipped with a current transformer rated current transformer ratio, in the selection of this meter, it must be and the corresponding supporting the use of current transformers.

Outside the cassette clever use of magneto optical current transformer current sensing structural characteristics of glass

Outside the cassette clever use of magneto optical current transformer current sensing structural characteristics of the glass, take double half-ring clamp structure in the tank circuit breakers, enclosed combination of electrical appliances and other  Circuit breaker  housing mounted externally, opening up a closed electrical the new direction of current sensing technology, rely on technological progress to break the foreign equipment and technology for the leading power  Electric energy meter  of the situation. Based on magnetic rotation effect, outside the cassette optical current transformer measurement accuracy, precision smart grid to meet the steady-state and transient measurement needs; small size, light weight,  electric meter , in line with the development trend of intelligent substation primary equipment; non-contact with high voltage can be charged to maintenance, operation and better security; clamp in a closed electrical housing exterior, installation, maintenance and replacement easier.

Insulation inverted current transformer seal with fluorine silicone rubber material imported

Gas insulated inverted current transformer ring import fluorosilicone rubber material for high  air circuit breaker  and low temperature changes and harsh environment areas, leakage rate of less than 0.5%; aluminum alloy casing, base, junction boxes, plates,  electric meter  All parts fasteners never rust; density table mounted on the base, the table can display the gas pressure inside the transformer (display 20 ℃ automatically converted to the internal gas pressure) and the density of the internal pressure drop when the transformer provide a signal to the alarm pressure, requiring qi.

Non-contact self-powered clamp current transformer can be connected to only one conductor

Non-contact self-powered clamp current transformer can be connected only with a conductor without having screwed or welded to the bracket complex, so that the installation and maintenance easier. To avoid complicated wiring, these transformers can be installed in the electrical control panel to achieve the sometimes inaccessible or harsh environments running equipment for remote monitoring. Clamp  mcb circuit breaker  has the advantage without the need for a charging device can interfere with the operation of their reassembled into it, which often become engineers designed the clamp transformer power meter only choice. But these advantages there is a price to make than solid core current transformer  mcb circuit breaker  prices are more expensive, but also less accurate. Therefore, understanding the various techniques can be applied to the difference between the limiting conditions and in accordance with specific application to choose is very important. Clamp current transformer is usually based on the above  Electric transformer  solid core transformer. However, in this case, the core is composed of two distinct parts can be separated components. Uncertainty mainly from poor contact between the two parts, and the secondary winding around the core distributed unevenly distributed and only one of the two parts around it. The price and performance of these transformers and equipment of the physical and mechanical properties. Between the two parts of the core need to be very smooth contact surface and enough pressure. This is generally a sufficient clamping force generating member or a flexible material and / or a hinge mechanism and a reliable open characteristics.

Non-contact current transformers are more prone to loss of power as well as installation and safety issues

Because no contact shunt current transformer ratio is more prone to loss of power as well as installation and safety issues, so power measurement systems generally use non-contact current transformer. The traditional solid-core current transformer transformer on the principle that the primary and secondary windings connected to the core via a. Measuring current induced magnetic field within the core, resulting in a current generated in the secondary winding, the current and the primary  electric transformer  the number of turns of the secondary winding is proportional to the quotient. The common current transformer designed to measure the typical range of sinusoidal 50/60Hz AC current. As a result of common materials and processes, the well-known technique is very popular.
Solid core  circuit breakers  is designed specifically for new equipment and building power meter provides economic  Air circuit breaker  solution. But for existing machines and facilities involved in power monitoring numerous applications, these transformers is not appropriate, which may be used in all places before updating solid core transformers, we must cut off the power and disconnect the wires. Installed power metering system power if required, even if only for a while (eg interrupt production lines, telecommunications or data center power, some nuclear power plants, etc.), in general, is not possible, the reason is the cost too high or abnormally dangerous .

Power calculation obviously depends on the precision of the accuracy of the current transformer

Power monitoring system should be based on careful selection of very specific characteristics required current transformer:
1 Accuracy - In most applications, the measurement accuracy of the efficiency of the entire system has a direct impact. Power calculation obviously depends on the precision of the accuracy of the current transformer. A power meter may require accuracy  Circuit breaker  1% of the current transformer, and the accuracy will normally expensive materials and  mcb circuit breaker  processes related. An alternative is the application of each of the transformer of the power meter is calibrated. Taking into account the specific characteristics of each transformer, allows the power meter set at its most precise mode of operation and the variable transmitted from one transformer to another transformer. Learn linearity, drift and repeatability as well as its overall inaccurate readings to compensate opens the door to all kinds of new technology.

Within the protected transformer short-circuit failure caused by the saturation

Occurred in the area to be protected transformer saturation caused by short-circuit fault is not easy with the differential and restraint currents ratio distinction. This is because the differential and restraint currents measured value will be affected, and they will immediately satisfy the protection ratio of operating conditions. At this time, the ratio of the operating characteristics of the differential  Electric energy meter  effective, the failure rate differential protection features to meet operating conditions.
That occurred outside the protected transformer fault, it produces a large short-circuit currents caused through saturation will have a great false differential current, which in the case of each measuring point is not the same saturation is more serious. If the magnitude of the resulting operating point falls triggered by the ratio of the operating  electric transformer  of the differential protection zone, and do not take any measures to stabilize the differential protection ratio, the ratio differential protection will malfunction. Calculated according to Kirchhoff's current law to get the amount of current transformers on each side of the differential current, basic balance at the beginning of a short time, only the current imbalance will produce a smaller, until saturation will produce a greater differential current, causing the transformer differential protection. How to identify the current transformer saturation .

For active suspension electronic current transformer DC power supply design

Current transformers are important equipment for power system, introduce a suitable active electronic current transformer floating DC power supply design principles.  electric meter  coil and rechargeable batteries using a combination of methods can be taken on the bus current to improve the way the new program, the power over a wider dynamic range of the primary current electronic current transformers to meet power  electric transformer . Experimental results show that the power supply to meet the high voltage side of the electronic circuit for energy requirements. The method is to solve active electronic current transformer high side power problem one effective method.

Current and voltage of the power system, the basic physical

Current, voltage, power system is the basic physical quantities. Electronic current and voltage transformers as a new type of current, voltage measuring device with small size, light weight, no ferromagnetic saturated ferromagnetic resonance  mcb circuit breaker , computer protection interface easily with other characteristics, has made rapid progress in recent years. The digital output electronic transformer Electric transformer developed after further accelerate the pace of development of electronic transformer. This paper describes a comprehensive electronic transformer basic principles and the basis of composition, introduced digital output interface electronic transformer important part - the definition and composition of merged cells analyzed merging unit features.

The high-pressure-side circuit is improved

To improve measurement accuracy electronic current transformers, in which the high-pressure side of the circuit is proposed to improve the current new design. Main narrative of the coil, high-side power, high-pressure side of the signal processing circuit that is integral circuit, phase shift circuit improvements. By using the new  Electric transformer  coil wound coil can and transverse surface of each turn and so on, to overcome the shortcomings of conventional Rogowski coil. A new high-voltage power supply scheme, the power supply circuit can bus high current and low  electric meter  can still work, to provide a stable output voltage, effective solution to the electronic current transformer high side power problems. Introduced a digital integrator, using integral algorithm design digital integrator has a higher accuracy and stability, excellent phase characteristics. Also proposed based on the all-pass Bessel filter constant delay filter, the amplitude characteristic constant, and in the low frequency range with a constant delay time.

Voltage transformer as a new current, voltage measuring device with a small

Electronic current and voltage transformers as a new type of current, voltage measuring device with small size, light weight, no ferromagnetic saturation, ferromagnetic resonance frequency bandwidth, computer protection interface easily with other  electric transformer   has made rapid progress in recent years. The digital output electronic transformer standard protocol developed after further accelerate the pace of development of electronic transformer. This paper describes a  Electric transformer  electronic transformer basic principles and the basis of composition, introduced digital output interface electronic transformer important part - the definition and composition of merged cells analyzed merging unit features. According to their functional characteristics, the authors propose a FPGA and DSP architecture merging unit implementations.

Analysis of the hollow spiral coil sensing principle two structures

Hollow spiral coil emphatically analyzed two structures sensing principle and the mechanism of resistance to external magnetic interference deduced their mutual inductance is calculated and studied to explore the practical engineering of a variety of air-core coil spiral structure; affect spiral hollow coil performance factors were analyzed, and the corresponding measures to solve; designed experimental model, and thus the experimental testing and research; Finally, the study explored the hollow spiral coil electronic current transformers at high pressure, the low pressure  Electric energy meter  technology devices and made PCB planar spiral hollow coil can be used as the focus of future research and application. Theoretical analysis and experimental results show that: the hollow spiral coil current sensor  electric meter  frequency bandwidth, fast response, anti-electromagnetic interference capability, and can accurately measure small currents, as an electronic energy meter and relay dedicated current transformer Similarly, since no magnetic saturation, but also for medium and high voltage high current measurement system. The patented technology, which for the development of new electronic current transformer has important theoretical significance and practical value.