Dry-type autotransformer parameter description

Dry-type transformers are made of high-quality materials and advanced technology, and can be directly installed on loads of different natures. Dry-type transformers are divided into two types: self-coupling and isolation. The autotransformer is a single-turn transformer, which is used in places where the mains voltage needs to be transformed and there is no safety isolation requirement. The isolation transformer is a double-winding transformer, which not only has the function of transforming voltage in the power grid, but also can safely isolate the input winding and the output winding electrically to avoid touching the live body (or metal parts that may be charged due to insulation damage) at the same time. It can isolate the third harmonic of the power grid to the equipment, protect the heat generated by the machine and reduce the life of the insulating material, and has the effect of suppressing various interferences. The product is suitable for low-voltage power transmission and distribution places with AC 50Hz or 60Hz, input and output voltage below 1000V, and is often used in various imported equipment and electrical equipment that requires special voltage. WEHO

Features (1) Energy saving and low noise: It is made of high-quality cold-rolled silicon steel sheets stacked and made of high-temperature-resistant high-insulation materials. The Weihao coil has ventilation slots, which can effectively reduce the temperature of the coil; the use of special resin dipping paint can effectively reduce the operating time. vibration and noise. (2) High reliability: The structure is reasonable, the waveform is not distorted, it can run continuously for a long time, it is convenient and reliable to use, and its performance indicators fully meet the standard requirements of dry-type power transformers. (3) Environmental protection features: The product has heat resistance, moisture resistance, stability, chemical compatibility, low temperature resistance, radiation resistance and non-toxicity.

2. Technical parameters

(1) Capacity: Single-phase: 1KVA～200KVA Three-phase: 3KVA～1500KVA (special capacity can be customized)

Input voltage: single phase: 220V/208V/120V/110V/100V/200V (special voltage can be customized)

Output voltage: single-phase: 110/100V/220V/208V/120V/200V (special voltage can be customized)

Three-phase: 380V/400V/415V/440V/480V/220/200V/208 (special voltage can be customized)

Three-phase: 220/200V/208V/380V/400V/415V/440V/480V (special voltage can be customized)

(Connection group: any combination of △/Y is suitable for isolation transformers (special can be customized)

Frequency: 50Hz/60Hz

Insulation class: H/F/B class Insulation resistance: >200MΩ

Withstand voltage test: 3000V/min P—transformer rated (output) capacity (KVA)

Waveform distortion: ≤0.1% m

—Number of Phases Single-phase: m=1 Three-phase: m=3 I 2

—Rated output current (A)

(10) Temperature rise: <90℃ U 2 — rated output voltage (V) (three-phase is line voltage)

(11) Heat dissipation method: natural air cooling or temperature-controlled forced air cooling

▲ Note: ① The above are the technical parameters of our company's conventional products, not as the basis for customer acceptance of products, product acceptance should be based on the technical parameters agreed in the contract. ② If customers have special requirements, they can negotiate with the relevant departments of the company.

2-3. Specifications of this machine: (Please contact my sales technician)

3-2. Electrical schematic diagram of three-phase autotransformer (please contact my sales technician)

3-3. Electrical schematic diagram of single-phase isolation transformer (please contact my sales technician)

3. Electrical schematic diagram (please contact my sales technician)

3-4. Electrical schematic diagram of three-phase isolation transformer (please contact my sales technician)

(1) △/Y connection (please contact our sales technician)

(2) △/△ type connection (please contact my sales technician)

(3) Y/Y connection method (please contact my sales technician)

4. Environmental Requirements

4-1. When using this product,

The environmental requirements are: Ambient temperature: a. Maximum temperature: +50℃ d. Minimum temperature: -40℃ The altitude of the transformer installation site shall not exceed 2000m. The average monthly relative humidity of the wettest month is 90%, while the average temperature of the month is 30°C. The waveform of the power supply voltage approximates a sine wave. The supply voltage to which the polyphase transformer is connected should be approximately symmetrical. The installation site should be ventilated and dry, and there should be no gas, vapor, chemical deposits, dust and other explosive corrosive media that seriously affect the insulation of the transformer. Earthquake-induced ground acceleration: less than 3m/s 2 in the horizontal direction and less than 1.5m/s 2 in the vertical direction. There should be a certain space around the transformer for easy maintenance and maintenance. Do not use in parallel.