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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제품설명 단가 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 제품 번호 919-4700
제조사 부품 번호LF 510-S
제조사LEM
₩96,653.35
Each
수량
800:1 - - Closed Loop ±14.25 → ±25.2 V 800A ±0.16 A 70mm -40°C 89mm +85°C 40.6mm - -
RS 제품 번호 668-4067
제조사 부품 번호CT105F250/5-2.5/1
제조사HOBUT
₩63,413.60
Each
수량
250:5 21mm Base Mounted - - - - 79mm -30°C 105mm +80°C 53mm - -
RS 제품 번호 331-339
제조사 부품 번호CT132M100/5-2.5/1
제조사HOBUT
₩21,462.85
Each
수량
100:5 21mm DIN Rail Mounted - - 100A 5 A 65mm -30°C 45mm +85°C 30mm - -
RS 제품 번호 286-361
제조사 부품 번호LV 25-P
제조사LEM
₩101,732.70
Each
수량
14:1 - - Closed Loop 12 → 15 V 14A 25 mA 16.45mm 0°C 26mm +70°C 29.2mm - -
RS 제품 번호 913-9734
제조사 부품 번호METSECT5CC013
₩94,804.20
Each
수량
125:5 21mm Toroidal Ring - - - - - -25°C - +60°C - 65 x 44 x 30 mm -
RS 제품 번호 537-4485
제조사 부품 번호AC-1005
제조사Nuvotem Talema
₩5,093.30
Each (In a Pack of 5)
수량
5:1 - - - - 5A - - -40°C - +120°C - 23.8 x 23.8 x 11.12 mm -
RS 제품 번호 499-5378
제조사 부품 번호LTSR 25-NP
제조사LEM
₩27,810.10
Each
수량
80:1 3.2mm - Closed Loop 5 V 80A - 24mm -40°C 22.2mm +85°C 10mm - -
RS 제품 번호 533-0621
제조사 부품 번호CTSCEN200<1000/5
제조사HOBUT
₩119,501.90
Each
수량
200:5, 400:5, 600:5, 800:5, 1000:5 - Clip Fit - - - - 125mm -30°C 132mm +80°C 38mm - -
RS 제품 번호 819-9779
제조사 부품 번호90AS
제조사Efergy
₩17,350.70
Each
수량
- 12mm Split Core - - - - - - - - - - Data Loggers/DAS, Digital or Analog Meters, DMMs, Recorders
RS 제품 번호 775-4934
제조사 부품 번호ACX-1050
제조사Nuvotem Talema
₩6,883.55
Each
수량
50:1 - - - - 50A - - -40°C - +85°C - 23.8 x 23.8 x 11.12 mm -
RS 제품 번호 793-4613
제조사 부품 번호DVL 1000
제조사LEM
₩303,507.05
Each
수량
- - - - ±15 → 24 V - 50 mA 48.3mm -40°C 63mm +85°C 100mm - -
RS 제품 번호 173-0064
제조사 부품 번호ACX-1050
제조사Nuvotem Talema
₩5,986.10
Each (In a Box of 240)
수량
50:1 - - - - 50A - - -40°C - +85°C - 23.8 x 23.8 x 11.12 mm -
RS 제품 번호 532-9211
제조사 부품 번호HTFS 200-P/SP2
제조사LEM
₩34,509.20
Each
수량
300:1 22mm - Open Loop 5 V 300A - 46.3mm -40°C 40mm +105°C 17mm - -
RS 제품 번호 435-8735
제조사 부품 번호HX 20-P/SP2
제조사LEM
₩16,392.80
Each
수량
60:1 1.6mm - Open Loop 12 → 15 V 60A - 20.5mm -25°C 19mm +85°C 15.4mm - -
RS 제품 번호 331-519
제조사 부품 번호CT143M100/5-2.5/1-001
제조사HOBUT
₩22,684.25
Each
수량
100:5 24mm DIN Rail Mounted - - 100A 5 A 70mm -30°C 49mm +85°C 45mm - -
RS 제품 번호 446-0614
제조사 부품 번호DK 100 B420
제조사LEM
₩671,703.35
Each
수량
100:1 21.7mm - Open Loop 20 → 50 V dc 100A 4 → 20 mA 68.6mm -20°C 89.7mm +50°C 30.2mm - -
RS 제품 번호 180-7357
제조사 부품 번호LA 55-P
제조사LEM
₩37,193.80
Each
수량
70:1 - - Closed Loop 12 → 15 V 70A 50 mArms 27.6mm -40°C 36.6mm +85°C 14.45mm - -
RS 제품 번호 302-6077
제조사 부품 번호2814359
제조사Phoenix Contact
₩392,295.70
Each
수량
5:1 - - - - 5A 0 → 20 mA 99mm -25°C 22.5mm +60°C 114.5mm - -
RS 제품 번호 668-4064
제조사 부품 번호CT105F200/5-2.5/1
제조사HOBUT
₩60,972.35
Each
수량
200:5 21mm Base Mounted - - - - 79mm -30°C 105mm +80°C 53mm - -
RS 제품 번호 451-1368
제조사 부품 번호LF 305S
제조사LEM
₩89,173.05
Each
수량
300:1 20.1mm - Closed Loop 12 → 20 V 300A 150 mArms 56.5mm -40°C 60mm +85°C 26.6mm - -