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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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. 833-2740
Mfr. Part No.DM2T0100
BrandLovato
HK$172.32
Each
units
100:5 23mm Base Mounted 65.5mm 52mm 46.5mm - - -25°C +50°C - - - -
RS Stock No. 833-2743
Mfr. Part No.DM0T0050
BrandLovato
HK$159.06
Each
units
50:5 22mm Base Mounted 66mm 44mm 32mm - - -25°C +50°C - - - -
RS Stock No. 833-2774
Mfr. Part No.DM3T1000
BrandLovato
HK$419.48
Each
units
1000:5 30mm Base Mounted 81.5mm 71mm 62.5mm - - -25°C +50°C - - - -
RS Stock No. 833-2746
Mfr. Part No.DM0T080
BrandLovato
HK$170.59
Each
units
80:5 22mm Base Mounted 66mm 32mm 44mm - - -25°C +50°C - - - -
RS Stock No. 833-2752
Mfr. Part No.DM2T0200
BrandLovato
HK$169.20
Each
units
200:5 23mm Base Mounted 65.5mm 52mm 46.5mm - - -25°C +50°C - - - -
RS Stock No. 833-2778
Mfr. Part No.DM4T1500
BrandLovato
HK$582.67
Each
units
1500:5 86mm Base Mounted 81.5mm 71mm 62.5mm - - -25°C +50°C - - - -
RS Stock No. 833-2759
Mfr. Part No.DM2T0150
BrandLovato
HK$172.32
Each
units
150:5 23mm Base Mounted 65.5mm 52mm 46.5mm - - -25°C +50°C - - - -
RS Stock No. 833-2771
Mfr. Part No.DM3T0800
BrandLovato
HK$422.33
Each
units
800:5 30mm Base Mounted 81.5mm 71mm 62.5mm - - -25°C +50°C - - - -
RS Stock No. 833-2762
Mfr. Part No.DM3T0600
BrandLovato
HK$328.16
Each
units
600:5 30mm Base Mounted 81.5mm 71mm 62.5mm - - -25°C +50°C - - - -
RS Stock No. 833-2768
Mfr. Part No.DM3T0500
BrandLovato
HK$212.35
Each
units
500:5 30mm Base Mounted 81.5mm 71mm 62.5mm - - -25°C +50°C - - - -