Current Transformers

What is it?
A current transformer is a device that is used for the transformation of current from a higher value into a proportionate current to a lower value. It transforms the high voltage current into the low voltage current due to which the heavy current flows through the transmission lines is safely monitored by the ammeter. It produces a current in its secondary winding which is proportional to the current in its primary. Current transformers are the current-sensing units of the power system and are used at generating stations, electrical substations, and in industrial and commercial electric power distribution.
Types of Current Transformers
Toroidal Current Transformer - These 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.
Wound Current Transformer - 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.
Bar-type Current Transformer – 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.

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Description Price 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 Stock No. 913-9734
Mfr. Part No.METSECT5CC013
HK$337.96
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125:5 21mm Tropicalise - - - - - -25°C +60°C 65 x 44 x 30 mm - DIN Rail -
RS Stock No. 913-9731
Mfr. Part No.METSECT5CC005
HK$274.82
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50:5 21mm Tropicalise - - - - - -25°C +60°C 65 x 44 x 30 mm - DIN Rail -
RS Stock No. 913-9738
Mfr. Part No.METSECT5CC020
HK$284.90
Each
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200:5 21mm Tropicalise - - - - - -25°C +60°C 65 x 44 x 30 mm - DIN Rail -
RS Stock No. 917-6531
Mfr. Part No.LT6CT2001
HK$561.29
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- - - - - - - - - - 107 x 95 x 25 mm - - -