Current Transformers

Current transformers or (CT’s) are instruments that are used to transform the current from a high current into a lower current so that the power can then be used for measuring and controlling. The transformers consist of a core, a primary and a secondary winding.RS Components offer an extensive range of highly accurate CT’s in various transformer types, current ratings, CT ratio supply voltages and mounting types to suit every application. Supplied by industry-leading brands including Siemens, Murata Power Solutions LEM and of course RS PRO.

How does a current transformer work?

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.

Types of current transformer

Toroidal Current Transformer - 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.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.

Where would I use a current transformer?

CT's are used in a wide range of industrial and commercial measurement applications. Some of the most common are:Generating stationsElectrical substationsCommercial electric power distributionElectrical panels


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กำลังดูสินค้า 21 - 40 รายการจาก 1151 รายการ / Viewing 21 - 40 of 1151 products
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รายละเอียดสินค้า / Description ราคา / Price Current Ratio Bore Size Transformer Type Sensor Technology Supply Voltage Input Current Output Current Overall Height Minimum Temperature Overall Width Maximum Temperature Overall Depth Dimensions For Use With
RS Stock No. 331-581
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CTSCM40300/5-2.5/1
Brand :HOBUT
THB1,784.02
Each
Units
300:5 - Clip Fit - - 300A 5 A 116mm -30°C 104.5mm +80°C 35.5mm - -
RS Stock No. 819-9779
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.90AS
Brand :Efergy
THB453.37
Each
Units
- 12mm Split Core - - - - - - - - - - Data Loggers/DAS, Digital or Analog Meters, DMMs, Recorders
RS Stock No. 106-8533
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.56200C
THB49.57
Each (In a Tube of 25)
Units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 715-7065
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.56200C
THB55.53
Each
Units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 451-1396
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LF 1005S
Brand :LEM
THB9,156.58
Each
Units
1500:1 40.5mm - Closed Loop 15 → 24 V 1500A 200 mArms 95mm -40°C 110mm +85°C 34.3mm - -
RS Stock No. 446-0585
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AKR 200 B420L
Brand :LEM
THB14,098.44
Each
Units
200:1 21.7mm - - 24 V dc, 150 V ac 200A 4 → 20 mA 57.2mm -20°C 89.7mm +50°C 30mm - -
RS Stock No. 775-2705
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CTSCMICRO19-150/5-T-S
Brand :HOBUT
THB1,578.44
Each
Units
- - - - - - - 78mm -30°C 58mm 55°C 49mm - -
RS Stock No. 775-2701
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CTSCMICRO19-100/5-T-S
Brand :HOBUT
THB1,879.70
Each
Units
- - - - - - - 78mm -30°C 58mm 55°C 49mm - -
RS Stock No. 399-7250
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ASM-050
THB172.64
Each
Units
50:1 - - - - 50A - - -40°C - +120°C - 35 x 32 x 20.5 mm -
RS Stock No. 123-9539
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.7KT1200
Brand :Siemens
THB8,299.07
Each
Units
60:5 13mm Straight Through - - 60A 5 A - - - - - 105 x 71 x 90 mm -
RS Stock No. 497-110
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LA 200-P
Brand :LEM
THB2,281.95
Each
Units
300:1 13 x 11mm - Closed Loop 12 → 15 V 300A 100 mArms 33.6mm -40°C 48.4mm +85°C 21.4mm - -
RS Stock No. 435-8757
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HX 10-NP
Brand :LEM
THB544.33
Each
Units
60:1 1mm - Open Loop 15 V 60A - 20mm -25°C 19mm +85°C 15.4mm - -
RS Stock No. 435-8634
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HX 05-P
Brand :LEM
THB544.28
Each
Units
15:1 0.8mm - Open Loop 15 V 15A - 20mm -25°C 19mm +85°C 15.4mm - -
RS Stock No. 522-018
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HAT 500-S
Brand :LEM
THB1,862.01
Each
Units
1500:1 40.5 x 30.5mm - Open Loop 15 V 1500A - 65mm -10°C 90mm +80°C 37mm - -
RS Stock No. 913-9738
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.METSECT5CC020
THB2,010.05
Each
Units
200:5 21mm Toroidal Ring - - - - - -25°C - +60°C - 65 x 44 x 30 mm -
RS Stock No. 301-9489
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HAS 50S
Brand :LEM
THB851.99
Each
Units
150:1 20.4 x 10.4mm - Open Loop 15 V 150A - 30mm -10°C 40mm +80°C 30mm - -
RS Stock No. 207-2984
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LA 205-S
Brand :LEM
THB2,974.17
Each
Units
300:1 22.7 x 17.4mm - Closed Loop 12 → 15 V 300A 100 mArms 56.3mm -10°C 66mm +85°C 56.5mm - -
RS Stock No. 527-8539
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DHR 200 C10
Brand :LEM
THB6,924.18
Each
Units
200:1 32mm - Open Loop 20 → 50 V dc 200A - 70mm -40°C 90mm +70°C 25mm - -
RS Stock No. 173-0060
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AC-1200
THB303.014
Each (In a Box of 27)
Units
200:1 - - - - 200A - - -40°C - +120°C - 55.6 x 20.6 x 55.6 mm -
RS Stock No. 729-5520
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AC-1200
THB289.65
Each
Units
200:1 - - - - 200A - - -40°C - +120°C - 55.6 x 20.6 x 55.6 mm -