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Transformers of PCB equipment

Kraftelektronik AB Static converter switch-kraft 10/50

Static converter switch-kraft 10/50 № 730789-15

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500 €

Number: 13000019

State: New

Amount: 7

plating electronic PE 134

power suply

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90 €

Number: 13000018

State: Used

Amount: 7

ISMET ISTU 500/1540 VA

Transformator 0-220V 5%

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110 €

Number: 13000027

State: Used

Amount: 4

SIEMENS 4AM4041-8BE40-0C

Transformator 0,25/0,852kVA 50/60Hz

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96 €

Number: 13000034

State: Used

Amount: 4

ISMET ISTU 160/300 VA

Transformator 0-220V 5%

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95 €

Number: 13000026

State: Used

Amount: 4

1 2 3 19 20

Transformers are designed to convert electricity. Their main task is to change the value of the alternating voltage.

Transformers are used both as independent devices and as components of other electrical devices.

Quite often, transformers are used to transmit electricity over long distances. Directly at power generating enterprises, they can significantly increase the voltage that is generated by an alternating current source.

By increasing the voltage to 1150 kW, transformers provide a more economical transmission of electricity: electricity losses in wires are significantly reduced and it becomes possible to reduce the cross-sectional area of ​​cables used in power lines.

The principle of operation of the transformer is based on the effect of electromagnetic induction. The classical design consists of a metal magnetic circuit and electrically unconnected windings made of insulated wire. The winding to which electricity is supplied is called primary. The second – connected to devices that consume current, is called secondary.
After the transformer is connected to an alternating current source, its primary winding forms an alternating magnetic flux. Through the magnetic circuit, it is transmitted to the turns of the secondary winding, inducing a variable EMF in them. In the presence of a consumption device, an electric current arises in the secondary winding circuit.

The main technical characteristics of transformers include:

voltage level: high voltage, low voltage, high potential
conversion method: up, down
number of phases: single or three phase
number of windings: double and multiwinding
magnetic core shape: rod, toroidal, armored

One of the main parameters is the device rating expressed in volt-amperes. The exact limit values ​​may vary slightly depending on the number of phases and other characteristics. However, as a rule, low-power devices are considered to be converting up to several tens of volt-amperes.

Devices of average power are considered to be devices from several tens to several hundred, and high-power transformers operate with indicators from several hundred to several thousand volt-amperes.

Operating frequency – distinguish between devices with reduced frequency (less than standard 50 Hz), industrial frequency – exactly 50 Hz, increased industrial frequency (from 400 to 2000 Hz) and increased frequency (up to 1000 Hz).