Zhengzhou 33kV dry transformer transformer quotation

Description :

　　The microcomputer protection device for dry-type transformers is an economical protection system that integrates measurement, control, protection, and communication; Tailored for the high-voltage distribution room of the distribution network terminal, with three-stage undirected current protection as the core, equipped with monitoring and acquisition functions of power grid parameters, which can eliminate traditional ammeters, voltmeters, power meters, frequency meters, kilowatt hour meters, etc., and can remotely transmit measurement data and protection information to the upper computer through the communication port, facilitating the automation of the distribution network; The device integrates a backup power supply self switching function based on the characteristics of the distribution network power supply, which can flexibly realize the functions of incoming line backup switching and mother branch backup switching.

　　Structural characteristics of dry-type transformers:

　　Due to its strong short-circuit resistance, low maintenance workload, high operating efficiency, small size, and low noise, dry-type transformers are commonly used in places with high performance requirements such as fire and explosion prevention.

　　1. Safe, fireproof, pollution-free, and can operate directly in the load center;

　　2. Adopting domestic technology, it has high mechanical strength, strong short-circuit resistance, small partial discharge, good thermal stability, high reliability, and long service life;

　　3. Low loss, low noise, significant energy-saving effect, maintenance free;

　　4. Good heat dissipation performance, strong overload capacity, can increase capacity operation when forced air cooling;

　　5. Good moisture resistance, suitable for operation in high humidity and other harsh environments;

　　6. Dry type transformers can be equipped with comprehensive temperature detection and protection systems. Adopting an intelligent signal temperature control system, it can automatically detect and display the working temperature of each three-phase winding, automatically start and stop the fan, and have functions such as alarm and trip settings;

　　7. Small size, light weight, small footprint, and low installation cost.

　　Characteristics and structure of dry-type transformer:

　　1、 Temperature control system:

　　The safe operation and service life of dry-type transformers largely depend on the safety and reliability of the transformer winding insulation.

　　2、 Cooling method:

　　The cooling methods for dry-type transformers are divided into natural air cooling (AN) and forced air cooling (AF). During natural air cooling, the transformer can operate continuously for a long time at its rated capacity. When forced air cooling is used, the output capacity of the transformer can be increased by 50%. Suitable for intermittent overload operation or emergency overload operation; Due to the significant increase in load loss and impedance voltage during overload, it is in a non economic operating state and should not be subjected to long-term continuous overload operation.

　　Dry type transformer structure type:

　　The iron core is mainly composed of silicon steel sheets and coils cast with epoxy resin. Insulation cylinders are placed between high and low voltage coils to increase electrical insulation, and the coils are supported and constrained by cushion blocks. The fasteners used for component overlap have anti loosening properties.

　　Construction performance:

　　⑴ Solid insulation encapsulated winding;

　　⑵ Do not encapsulate the winding.

　　Winding: Among the two windings, the one with higher voltage is the high-voltage winding, and the one with lower voltage is the low-voltage winding.

　　From the relative position of the high and low voltage windings, high voltage can be divided into concentric and overlapping types.

　　Concentric windings are simple and easy to manufacture, and all adopt this structural method.

　　Overlapping type, mainly used for special transformers.

　　Working environment of dry-type transformer:

　　1. 0-40 (℃), relative humidity<70%;

　　2. Altitude: not exceeding 2500 meters;

　　3. Avoid exposure to rainwater, moisture, high temperature, high heat, or direct sunlight. The distance between its heat dissipation ventilation holes and surrounding objects should not be less than 40cm;

　　4. Prevent working in places with corrosive liquids, gases, dust, conductive fibers, or metal shavings;

　　5. Prevent working in places with vibration or electromagnetic interference;

　　6. Avoid long-term inverted storage and transportation, and avoid strong impact.

　　Shandong Changneng Transformer Manufacturing Co., Ltd. always adheres to the development philosophy of "advocating science, focusing on quality, and being honest and trustworthy", and wholeheartedly provides excellent products and services for our customers.

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