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. 331-597
Mfr. Part No.CT132M40/5-1/3
BrandHOBUT
TWD520.00
Each
units
40:5 21mm DIN Rail Mounted 65mm 45mm 30mm - - -30°C +85°C - - - -
RS Stock No. 331-474
Mfr. Part No.CT132M50/5-1/1
BrandHOBUT
TWD396.00
Each
units
50:5 21mm DIN Rail Mounted 65mm 45mm 30mm - - -30°C +85°C - - - -
RS Stock No. 886-2128
Mfr. Part No.XM02-195071S000000
TWD366.00
Each
units
120:5 21mm Base Mounted - - - - - - - 45 x 40 x 65 mm - Surface Mount Omega XMER
RS Stock No. 173-0060
Mfr. Part No.AC-1200
TWD143.40
Each (In a Box of 27)
units
- - - - - - 200A - -40°C +120°C 55.6 x 20.6 x 55.6 mm - Through Hole -
RS Stock No. 729-5520
Mfr. Part No.AC-1200
TWD173.00
Each
units
- - - - - - 200A - -40°C +120°C 55.6 x 20.6 x 55.6 mm - Through Hole -
RS Stock No. 399-7317
Mfr. Part No.AS-103
TWD52.00
Each
units
- - - - - - 15A - -40°C +120°C 17.2 x 20.4 x 9.53 mm - PCB Mount -
RS Stock No. 751-1617
Mfr. Part No.93482 P1
TWD862.00
Each
units
- - - - - - 100A - -20°C +70°C 70 (Dia.) x 36 mm - Stand Alone -
RS Stock No. 751-1614
Mfr. Part No.93481 P1
TWD666.00
Each
units
- - - - - - 60A - -20°C +70°C 70 (Dia.) x 36 mm - Stand Alone -
RS Stock No. 886-2118
Mfr. Part No.XM02-135031S000000
TWD407.00
Each
units
50:5 21mm Base Mounted - - - - - - - 45 x 40 x 65 mm - Surface Mount Omega XMER
RS Stock No. 173-0057
Mfr. Part No.AX-1000
TWD101.20
Each (In a Box of 250)
units
- - - - - - 10A - -40°C +120°C 12.7 x 17 x 9.53 mm - Through Hole -
RS Stock No. 775-4928
Mfr. Part No.AX-1000
TWD86.00
Each
units
- - - - - - 10A - -40°C +120°C 12.7 x 17 x 9.53 mm - Through Hole -
RS Stock No. 106-8528
Mfr. Part No.53150C
TWD28.30
Each (On a Reel of 1000)
units
- - - - - - 10A - -40°C +125°C 8.3 x 7.2 x 5.4 mm - Surface Mount -
RS Stock No. 715-7049
Mfr. Part No.53150C
TWD34.00
Each
units
- - - - - - 10A - -40°C +125°C 8.3 x 7.2 x 5.4 mm - Surface Mount -
RS Stock No. 751-1620
Mfr. Part No.93484 P1
TWD711.00
Each
units
- - - - - - 200A - -20°C +70°C 62 (Dia.) x 20 mm - Stand Alone -
RS Stock No. 857-7432
Mfr. Part No.E83-2050
TWD12,522.00
Each
units
100 A:30 mA 12mm Base Mounted 56mm 22.5mm 47.4mm - - -20°C +50°C 56 x 22.5 x 47.4 mm - - -
RS Stock No. 715-7061
Mfr. Part No.56100C
TWD55.00
Each
units
- - - - - - 10A - -40°C +85°C 16.79 x 8.89 x 20.19 mm - Through Hole -
RS Stock No. 751-1627
Mfr. Part No.93486 P1
TWD537.00
Each
units
- - - - - - 300A - -20°C +70°C 62 (Dia.) x 20 mm - Stand Alone -
RS Stock No. 123-6734
Mfr. Part No.XS02-285055S 000000
TWD1,534.00
Each
units
300:5 80 x 50mm Clip Fit - - - - - - - 125 x 40 x 158 mm - Surface Mount Omega10
RS Stock No. 106-8532
Mfr. Part No.56100C
TWD53.00
Each (In a Tube of 25)
units
- - - - - - 10A - -40°C +85°C 16.79 x 8.89 x 20.19 mm - Through Hole -
RS Stock No. 106-8535
Mfr. Part No.56T200C
TWD53.60
Each (In a Tube of 25)
units
- - - - - - 10A - -40°C +85°C 16.79 x 8.89 x 20.19 mm - Through Hole -