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Dry-type transformer manufacturer: characteristic structure of dry-type transformer
Dry-type transformer manufacturersIntroduction, dry-type transformer is widely used in local lighting, high-rise buildings, airports, wharf CNC machinery and equipment and other places. Simply put, a dry-type transformer is a transformer whose core and windings are not immersed in insulating oil.
The cooling methods of dry-type transformers are divided into natural air cooling (AN) and forced air cooling (AF). During the natural air cooling process, the transformer can operate continuously at the rated capacity for a long time. When forced air cooling, the output capacity of the transformer can be increased by 50%. It is suitable for intermittent overload operation or emergency overload operation; due to the large increase in load loss and impedance voltage during overload, it is in a non-economic operation state, and it is not suitable to maintain continuous overload operation for a long time.
Dry-type transformer manufacturers said,The dry-type transformer is mainly composed of an iron core composed of silicon steel sheets and a coil cast with epoxy resin. An insulating cylinder is placed between the high and low voltage coils to increase electrical insulation. The coils are supported and constrained by spacers. The fastener having the overlapping portion has an anti-loosening property.
What is the characteristic structure of dry-type transformer?
1. Temperature control system. The safe operation and service life of dry-type transformers depend to a large extent on the safety and reliability of transformer winding insulation.
2. Cooling mode. Dry-type transformer cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). In the process of natural air cooling, the transformer can run continuously at the rated capacity for a long time. When forced air cooling, the output capacity of the transformer can be increased by 50%, which is suitable for intermittent overload operation or emergency overload operation. Due to the large increase in load loss and impedance voltage during overload, it is in a non-economic operation state, and it is not suitable to maintain continuous overload operation for a long time.
Dry-type transformer manufacturers said that the microcomputer protection device for dry-type transformers is an economical protection device integrating measurement, control, protection and communication. It is tailored for the high-voltage distribution room of the distribution network terminal. It takes undirectional current protection as the core and is equipped with the function of monitoring and collecting power grid parameters. It can save the traditional ammeter, voltmeter, power meter, frequency meter, electric energy meter, etc. The measurement data and protection information can be transmitted to the upper computer through the communication port, so as to facilitate the automation of the distribution network. According to the power supply characteristics of the distribution network, the device integrates the automatic switching function of the standby power supply, which can flexibly realize the standby switching function of the incoming line and the standby switching function of the bus distribution.
The microcomputer protection device of dry-type transformer adopts the international advanced DSP, surface mount technology and flexible field bus (CAN) technology, which meets the requirements of different voltage levels of the substation and realizes the coordination, digitization and intelligence of the substation. This series of products can complete substation protection, measurement, control, regulation, signal, fault recording, power acquisition, small current grounding line selection, low cycle load reduction and other functions. The technical requirements, functions and internal wiring of the product are more standardized. The product adopts distributed protection and measurement and control devices, which can be installed centrally or dispersedly. The configuration can be changed arbitrarily according to user needs to meet the requirements of different schemes.
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