Current Transformers

pCurrent transformers (CT) are devices that are used to transform the current from a high current into a lower current so that the power can then be measured and controlled. The transformers consist of a core, a primary and a secondary winding. When an alternating current flows through the primary winding, a magnetic flux is created which then induces an alternating current in the secondary winding. This alternating current is proportional to the current in its primary. Current transformers are also known as a "step-down transformers". Once the current has been reduced it can be safely monitored and measured using an ammeter./p pCurrent transformers can perform circuit control and perform roles for safety protection and current limiting./p p Current transformers are found in:/p ulliGenerating stations,/li liElectrical substations/li liCommercial electric power distribution./li/ul h2Types of Current Transformers/h2 pstrongToroidal Current Transformer/strong - These transformers are shaped like a doughnut they do not contain a primary winding. Instead, the line that carries the current flowing in the network is threaded through a window or hole in the toroidal transformer. Toroidal transformers offer high efficiency with minimal excess noise and little excess leakage inductance./p pstrongWound Current Transformer/strong - The transformers primary winding is physically connected in series with the conductor that carries the measured current flowing in the circuit. The magnitude of the secondary current is dependent on the turns ratio of the transformer./p pstrongBar-type Current Transformer/strong – This type of current transformer uses the actual cable or bus-bar of the main circuit as the primary winding, which is equivalent to a single turn. They are fully insulated from the high operating voltage of the system and are usually bolted to the current carrying device./p

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Beskrivning Pris Current Ratio Inner Diameter Transformer Type Overall Height Overall Width Overall Depth Input Current Output Current Minimum Temperature Maximum Temperature Dimensions For Use With Mounting Type Series
RS-artikelnummer 897-6933
Tillv. art.nr4 121 58
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400:5 - Base Mounted - - - - - -25°C +50°C 135 x 66.5 x 56 mm Ammeter, Electricity Meter, Measurement Control Unit Surface Mount -
RS-artikelnummer 897-6924
Tillv. art.nr4 121 57
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250:5 - Base Mounted - - - - - -25°C +50°C 107 x 58.5 x 56 mm Ammeter, Electricity Meter, Measurement Control Unit Surface Mount -
RS-artikelnummer 897-6930
Tillv. art.nr4 121 52
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2500:5 - Base Mounted - - - - - -25°C +50°C 160 x 125 x 40 mm Ammeter, Electricity Meter, Measurement Control Unit Surface Mount -
RS-artikelnummer 897-6936
Tillv. art.nr4 121 42
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1250:5 - Base Mounted - - - - - -25°C +50°C 116 x 96 x 58 mm Ammeter, Electricity Meter, Measurement Control Unit Surface Mount -
RS-artikelnummer 897-6857
Tillv. art.nr4 121 54
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2 799,90 kr
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4000:5 - Base Mounted - - - - - -25°C +50°C 160 x 125 x 40 mm Ammeter, Electricity Meter, Measurement Control Unit Surface Mount -