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2026专业的全站克隆服务 - 极速上线 Xiamen first transformer Co., LTD Home About us About us View More Company profile Process flow Honor and qualification Corporate culture Corporate environment Product center Product center View More 10KV- Current/voltage transformer Current transformer for inflatable cabinet Voltage transformer for inflatable cabinet Low voltage current transformer 20KV-35KV current/voltage transformer Outdoor combined metering box News information News information View More Company dynamics Industry dynamics Video center Service and support Service and support View More Data download Contact us Contact us View More Contact information Map navigation Online message EN English Chinese About us Company profile Process flow Honor and qualification Corporate culture Corporate environment Product center 10KV- Current/voltage transformer Current transformer for inflatable cabinet Voltage transformer for inflatable cabinet Low voltage current transformer 20KV-35KV current/voltage transformer Outdoor combined metering box News information Company dynamics Industry dynamics Video center Service and support Data download Contact us Contact information Map navigation Online message Product Center  10KV- Current/voltage transformer 10KV- Current/voltage transformer Power factor: COSφ=0.8 (lag) Rated secondary current: 5A or 1A Rated frequency: 50Hz or 60Hz;   Current transformer for inflatable cabinet Current transformer for inflatable cabinet New and improved products for ZW32 switches   Voltage transformer for inflatable cabinet Voltage transformer for inflatable cabinet It is suitable for voltage and electric energy measurement and relay protection in power system within rated voltage range   Low voltage current transformer Low voltage current transformer A low voltage current transformer usually consists of a main coil and a secondary coil. The main coil is usually wound by a conductor, and its number of turns determines the transformer's ratio   20KV-35KV current/voltage transformer 20KV-35KV current/voltage transformer Power factor: COSφ=0.8 (lag) Rated secondary current: 5A or 1A Rated frequency: 50Hz or 60Hz;  About us --> Xiamen First Transformer Co., Ltd. is a private enterprise specializing in the production, research and development and sales of transformers, the company is located in Haicang District, Xiamen City, the factory covers an area of 6000 square meters, the main production of high voltage, indoor, outdoor current, voltage transformers, complete varieties and specifications, is the backbone enterprise manufacturing medium voltage transformers. The company has the domestic advanced level of epoxy one-time pressure injection molding equipment, vacuum ··· 10 Years Company production experience 12 + Various qualification certificates 100 + Company employee 6000 ㎡ Floor space View details environment environment --> Cargo placement Cargo placement Copper storage shelves Copper manufacturing Winding process Corporate environment Laser marking Inspection equipment solution solution --> Primary and secondary fusion ring cabinet/inflation cabinet Vacuum circuit breaker on column Power distribution room Electric power system Primary and secondary fusion ring cabinet/inflation cabinet Epoxy resin cast insulation fully enclosed structure, high quality transformer using longer built-in fuse can effectively protect PT, fuse replacement is convenient. Our company has long-term cooperation with large enterprises at home and abroad, power transmission and distribution industry, well-known enterprises and so on, gathering good quality and high-quality service reputation in the industry, good operation of the power system. Consult us Vacuum circuit breaker on column Electrical system is the basic technical guarantee for high-rise buildings to provide user-friendly services to owners and ensure the stable operation of building automation system. At the same time, in the total energy consumption of high-rise buildings, the electrical system also accounts for a large part of the energy consumption Consult us Power distribution room The quality of the distribution box is closely related to the transformer of the distribution box, but most people do not understand the transformer of the distribution box, nor do they know what the role of this part is, in fact, the role of the transformer of the distribution box is very large, and relay protection is one of the well-known roles. Through the relay protection can ensure the stability of the current, to ensure that the enterprise does not have any problems in the production process. It can be said that the higher the production demand of the enterprise, the higher the requirements for the transformer of the distribution box will be.As we all know, the current flow of the equipment needs to be controlled within a certain standard, if it exceeds the standard, it will cause damage to the equipment. The transformer of the distribution box can reduce the current through the equipment, ensure that the current is suitable for the equipment, avoid equipment damage due to high current, and fundamentally ensure the smooth production of the enterprise. Consult us Electric power system The transformer, as an important measuring instrument, is used in the power system, which makes the high voltage and current visible through the transformer. The transformer can measure the voltage, current and electric energy of the primary system in combination with measuring instruments and metering devices. Together with the relay protection and automatic device, it can constitute the electrical protection and automatic control of various faults in the power grid. The performance of transformer directly affects the accuracy of power system measurement and measurement and the reliability of relay protection device. Consult us Honor Honor --> Honor Honor Honor Honor Honor Honor Media Center Media Center --> What is the main role of the high voltage transformer? Classification of high voltage transformers: By function: Voltage transformer :JDZ series Current transformer :lzb series By filling material: oil-immersed transformer: insulated oil-filled dry transformer: epoxy resin filled semi-enclosed transformer According to sealing grade :JDZ transformer such as horn, terminal and other parts are exposed, others are closed. Fully enclosed transformer: The whole body is closed. Voltage transformer - According to the principle can be divided into electromagnetic induction and capacitive voltage. According to the purpose, voltage transformers are divided into two categories: measurement and protection. 1. Electromagnetic induction voltage transformer. It works on the same principle as a transformer. The basic structure is also iron core, primary and secondary windings. It is characterized by small and constant capacity and close to no-load state during normal operation. The impedance of the voltage transformer itself is very small. Once the secondary side is short circuited, the current will increase sharply, burning out the coil. Therefore, the primary side of the voltage transformer is connected with a fuse and the secondary side is grounded to avoid accidents caused by high potential on the secondary side when the insulation of the primary side and the secondary side is damaged. The equivalent circuit of an electromagnetic voltage transformer is the same as that of a transformer. 2. Capacitive voltage transformer. Made on the basis of capacitive voltage divider. Capacitive voltage transformers are often used in conjunction with coupling capacitors for carrier communication in power systems to simplify the system and reduce costs. At this point, it is also necessary to meet the requirements of communication operations. According to the structure, the voltage transformer can be divided into oil-immersed type, dry type, three-core five-column type and single-phase type, and fully insulated type and semi-insulated type.The functions of the high voltage transformer are as follows :1. The high voltage and high current of the primary loop are changed to the standard grade of the secondary loop, the rated secondary voltage is usually 100V, and the rated secondary current is 5A, so that the measuring instruments and protection devices are standardized, and the insulation grade of the secondary equipment can be designed according to the low voltage, the structure is lightweight and the price is cheap. 2. All secondary devices can be connected through low voltage and small current control cables, making the wiring in the screen simple and easy to install. At the same time, it is convenient for centralized processing and can realize remote control and measurement. 3. Secondary circuits are not limited by primary circuits. It can be connected in y shape, △ shape or V shape, and the connection is flexible and convenient. At the same time, without interrupting the operation of the primary system, the maintenance, replacement and adjustment test of the secondary equipment can be realized only by appropriately changing the secondary wiring. 4. Secondary equipment and personnel are isolated from the high-voltage part, and the secondary side of the transformer is grounded to ensure the safety of equipment and personnel. In AC circuits, transformers are usually used to convert high voltage to low voltage and high current to small current, which are then used for measurement, control and protection. This can not only increase the range of the measuring instrument, facilitate the standardization of the instrument, reduce the voltage and current of the control and protection equipment, but also separate the instrument from the equipment or high voltage circuit, so as to ensure the safety of the instrument, equipment and personnel.High voltage transformers are mainly used in AC circuits to monitor the operation of electrical equipment and control systems (usually its first winding is called a primary winding or primary winding, and its second winding is called a secondary winding or secondary winding). Used to supply voltage and current coils to measuring instruments and relays to correctly reflect the normal operation and failure of electrical equipment. The accuracy of the measuring instrument and the reliability of the relay protection action are largely related to the performance of the transformer. Therefore, we should be familiar with some of the main characteristics of the transformer in order to correctly select and use the transformer. 23-Nov-Sat see more Voltage transformer accuracy level and capacity Voltage transformer JDZW2-35 Voltage transformer is an epoxy resin vacuum casting fully enclosed structure, suitable for the rated frequency of 50HZ rated voltage 35KV and below the outdoor equipment power system operating voltage, energy measurement and relay protection use. This kind of voltage transformer adopts arc resistance, ultraviolet resistance, aging resistance outdoor special epoxy resin vacuum casting, completely closed column structure is resistant to pollution and moisture. This kind of transformer does not require special maintenance, only need to regularly clean the dirt on the surface can be because the transformer is completely enclosed and insulated, so small size, light weight, suitable for installation in any position and direction. The secondary terminal of the transformer is sealed with a metal protective cover.The accurate level of the voltage transformer refers to the voltage error when the load power factor is rated within the specified range of primary voltage and secondary load changes. Because the error of the voltage transformer is related to the load, the same voltage transformer corresponds to different accuracy levels and different capacities. Generally, the rated capacity refers to the capacity corresponding to the accuracy level. The voltage transformer also specifies the capacity based on the allowable heating conditions for long-term operation at the operating voltage. The load requirement of the voltage transformer is that the sum of the load capacity cannot exceed the rated secondary capacity of the transformer.Oil-immersed voltage transformer can be divided into ordinary type and cascade type according to its structure, and 3-35 kV is made into ordinary type, similar to ordinary small transformers. The 110kV and above electromagnetic voltage transformer is generally made of cascade structure, which is characterized by: the winding and the iron core are segmented insulation, simplifying the insulation structure; The winding and iron core are placed in porcelain sleeves to reduce weight and volume.Combined current and voltage transformer. The combined transformer is composed of the current transformer and the voltage transformer, and is mainly installed in the high voltage metering box and cabinet, which is used as the power source for measuring electric energy or as the relay protection device of electrical equipment. The combined current and voltage transformer is two or three current transformer primary and secondary winding and core and voltage transformer primary and secondary winding and core, fixed on the steel body frame, immersed in the box with transformer oil, the first and secondary winding lines are drawn out, connected to the high and low voltage porcelain bottles outside the box, forming an insulated and closed whole. The primary side is connected to the power supply line, and the secondary side is connected to the metering device or relay protection device. According to different needs, the combined current and voltage transformer is divided into V/V connection and Y/Y connection to measure the electric energy when the three-phase load is balanced or unbalanced. 23-Nov-Mon see more High voltage current transformer Model Guide When you need to buy and use a current transformer, in fact, like other equipment, you can not choose casually. It is about choosing qualified manufacturers and products. Next, you need to pay attention to the model of the current transformer. Many people lack the experience and buy the wrong equipment. The main reason is that you chose the wrong model. In fact, the model of the equipment will be reflected in the packaging and body of the product, mainly in the form of letters and numbers. Current transformer model description First letter white :L- Current transformer; The second letter: through the wall type; Z-zhi column; M-bus type; d- single loop through type; V-shaped inverted structure; J-zero sequence; For grounding detection; w- anti-pollution; r- exposed winding type; The third letter: Z-epoxy resin cast type; c- porcelain insulation; q- gas insulating medium; W - for microcomputer protection; Fourth letter :B- with protection grade; c- differential protection; d-d grade; Q-enhanced type; j Enhanced ZG; Fifth number: Voltage level: product serial number.When the high voltage current transformer works, the secondary loop is always closed, so the impedance of the series coil between the measuring instrument and the protection loop is very small, and the working state of the current transformer is close to short circuit. The current transformer measures the high current of the primary side by converting the small current of the secondary side, and the secondary side cannot be open. Because there are many types and models of current transformers, in order to let everyone clearly choose the equipment they need, the model of current transformers is generally marked with letters and numbers. How to understand them? You can start with the second letter, representing the installation method of the current transformer, the third letter represents the insulation medium, the fourth letter is mainly related to the protection level, and the last letter is a number, representing the voltage level and the number of the product.The type of ground current transformer of the secondary circuit of the high voltage current transformer can fully meet the current needs of people, but it is not enough to buy the right one. The next step is to install it correctly. One of the considerations is the grounding of the secondary loop. In simple terms, the secondary circuit of the equipment should be grounded, which is also a safety measure. Because if the insulation between the primary loop and the secondary loop is destroyed, then the high pressure in the primary loop will enter the secondary loop, causing damage to the equipment, and also affecting the life safety of the people around, so it must be grounded, only a little grounding. 23-Nov-Mon see more Key issues of using current transformer When using current transformers, there are several key issues to pay attention to:Rated current: The rated current of the current transformer refers to the maximum current value that can work normally when the transformer is designed and manufactured. When using the transformer, it is necessary to select the appropriate rated current according to the range of measured current to avoid exceeding the rated current of the transformer, otherwise it may cause overload and damage to the transformer.Accuracy level: The accuracy level of the current transformer refers to the measurement accuracy of the transformer to the measured current under certain working conditions. The accuracy level is usually expressed by a percentage, such as 0.1, 0.2, etc. Choosing the right accuracy level depends on the specific measurement requirements, and high-precision transformers will be correspondingly more expensive. Frequency response: The frequency response of the current transformer refers to the frequency range in which the transformer can operate normally. In general, transformers are suitable for current measurement in the low frequency to medium frequency range, and frequency beyond the rated frequency range of the transformer may lead to measurement errors.Connection mode: There are two common connection modes of current transformer, one is plug-in transformer, which can directly insert the measured current through the transformer's mouth ring or plug; The other is a switching transformer, which requires the current line to be disconnected and the transformer to be wound around the current wire. In the selection and use, you need to choose the appropriate connection mode according to the actual situation.Interrupting current: The current transformer needs to consider the interrupting current when disconnecting the measurement circuit. The cut-off current is the current that flows through the secondary winding of the transformer when the circuit is disconnected. If the cut-off current is too large, it may cause breakdown and damage to the transformer. Therefore, when the measurement circuit is disconnected, appropriate protective measures should be taken, such as the use of interrupting current suppression devices or appropriate adjustment of the time and amplitude of the current. These are the problems that need to be paid attention to when using the current transformer. Reasonable selection and use of the current transformer can ensure the measurement accuracy and the safety and reliability of the equipment. 23-Nov-Mon see more --> About us Company profile Process flow Honor and qualification Corporate culture Corporate environment Product center 10KV- Current/voltage transformer Current transformer for inflatable cabinet Voltage transformer for inflatable cabinet Low voltage current transformer 20KV-35KV current/voltage transformer Outdoor combined metering box News information Company dynamics Industry dynamics Video center Service and support Data download Contact us Contact information Map navigation Online message Address：No. 196-20, Wei12 Road, Yueqing Economic Development Zone Phone：0592-6532199 Fax：0592-6531799 Email：3441624453@qq.com Copyright © 2023 Xiamen No.1 Instrument Transformer Co., LTD. All Rights Reserved. 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