Current Transformers

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Part RoHS Manufacturer Transformer Type Mounting Feature Manufacturer Series Approvals (V) Type (Primary) Window Dimension Isolation Voltage Packing Method Accuracy Class Current Rating Ip:Is (A) Dimensions Maximum Operating Temperature Minimum Operating Temperature Nominal Operating Frequency Height Width Diameter Nominal Input Voltage (V) Maximum Secondary Burden Minimum Operating Frequency Length Maximum Operating Frequency

AC1075

Nuvotem Talema

CURRENT TRANSFORMER

THROUGH HOLE MOUNTED

BAR PRIMARY

D14.6XH15.9 (mm)

50/60 HZ

38.1 mm

15.9 mm

38.1 mm

CR8420-1000

Cr Magnetics

CURRENT TRANSFORMER

THROUGH HOLE MOUNTED

BAR PRIMARY

D15XH36 m

3500 V

D30.0XH36.0 (mm)

85 Cel

-40 Cel

36 mm

30 mm

20 KHz

1 KHz

WA8351-ALC

Coilcraft

CURRENT TRANSFORMER

SURFACE MOUNT

AEC-Q200

WOUND PRIMARY

500 V

TR, EMBOSSED PLASTIC, 7 INCH

125 Cel

-40 Cel

5.4 mm

5 mm

6.6 mm

CT-06-50

KEMET Corporation

CURRENT TRANSFORMER

CHASSIS MOUNT

BAR PRIMARY

D6XH7.1 (mm)

TRAY

L18.0XB7.1XH22.4 (mm)

80 Cel

-20 Cel

22.4 mm

7.1 mm

18 mm

TCB50

Vishay Intertechnology

CURRENT TRANSFORMER

THROUGH HOLE MOUNTED

TCB

UL

BAR PRIMARY

D6.5XL15 (mm)

BOX

28mm X 18mm X 30mm

75 Cel

-30 Cel

50/400 HZ

30 mm

18 mm

28 mm

604-351

Abb

CURRENT TRANSFORMER

CHASSIS MOUNT

BAR PRIMARY

D1.42XH1.53 (inch)

1.5

350:5

2.5 VA

.05 KHz

.4 KHz

606-351

Cr Magnetics

CURRENT TRANSFORMER

CHASSIS MOUNT

CUL; UL

BAR PRIMARY

W2.75XH1.75 (inch)

600 V

1

350:5

129.032 mm

44.45 mm

4 VA

.05 KHz

153.67 mm

.4 KHz

2276117

Phoenix Contact

CURRENT TRANSFORMER

DIN RAIL MOUNT

UL

BAR PRIMARY

D42XH12 m

1000 V

1

L85.0XB30.0XH108.0 (mm)

40 Cel

-25 Cel

108 mm

30 mm

85 mm

PACTMCR-V1-21-44-50-5A-1

Phoenix Contact

CURRENT TRANSFORMER

CHASSIS MOUNT

IEC/EN

BAR PRIMARY

D21XH30 (mm)

1000 V

BULK

1

50:5

40 Cel

-25 Cel

50-60 HZ

66 mm

30 mm

44 mm

PACTMCR-V2-6015-85-600-5A-1-2277925

Phoenix Contact

CURRENT TRANSFORMER

SE-CS10-4

Littelfuse

CURRENT TRANSFORMER

CHASSIS MOUNT

CSA; UL

BAR PRIMARY

D108 m

0.02

12.5:0.0625

50/400 HZ

169.9 mm

32.5 mm

169.9 mm

SE-CS30-4

Littelfuse

CURRENT TRANSFORMER

CHASSIS MOUNT

CSA; UL

BAR PRIMARY

D95 m

0.01

30:0.05

50/400 HZ

175 mm

33.5 mm

158 mm

SE-CS10-6

Littelfuse

CURRENT TRANSFORMER

CHASSIS MOUNT

CSA; UL

BAR PRIMARY

D160.3 m

0.02

12.5:0.0625

50/400 HZ

215.9 mm

31.8 mm

215.9 mm

SE-CS10-2.5

Littelfuse

CURRENT TRANSFORMER

CHASSIS MOUNT

CSA; UL

BAR PRIMARY

D63.5 m

0.02

12.5:0.0625

50/400 HZ

124 mm

27.9 mm

124 mm

SE-CS30-26

Littelfuse

CURRENT TRANSFORMER

CHASSIS MOUNT

CSA; UL

BAR PRIMARY

D26 m

0.01

30:0.05

50/400 HZ

72 mm

26.5 mm

68 mm

CT200L

Littelfuse

CURRENT SENSE TRANSFORMER

CHASSIS MOUNT

CSA

BAR PRIMARY

D89 m

2

50/60 HZ

144.5 mm

44.5 mm

139.7 mm

SE-CS30-8

Littelfuse

CURRENT TRANSFORMER

CHASSIS MOUNT

CSA; UL

BAR PRIMARY

D200 m

0.01

30:0.05

50/400 HZ

309 mm

33.5 mm

290 mm

SE-CS40-6

Littelfuse

CURRENT TRANSFORMER

CHASSIS MOUNT

CSA; UL

BAR PRIMARY

D160.3m

0.02

50:0.0625

50/400 HZ

215.9 mm

31.8 mm

215.9 mm

SE-CS30-70

Littelfuse

CURRENT TRANSFORMER

CHASSIS MOUNT

CSA; UL

BAR PRIMARY

D70 m

0.01

30:0.05

50/400 HZ

138 mm

30 mm

121 mm

SE-CS30-5

Littelfuse

CURRENT TRANSFORMER

CHASSIS MOUNT

CSA; UL

BAR PRIMARY

D130 m

0.01

30:0.05

50/400 HZ

218 mm

33.5 mm

203 mm

SE-CS10-8

Littelfuse

CURRENT TRANSFORMER

CHASSIS MOUNT

CSA; UL

BAR PRIMARY

D209.5 m

0.02

12.5:0.0625

50/400 HZ

266.7 mm

38.9 mm

266.7 mm

KM20-CTF-100A

Omron

CURRENT TRANSFORMER

PANEL MOUNT

BAR PRIMARY

D14.5XH30.5 mm

60 Cel

-20 Cel

53.7 mm

37.4 mm

.01 KHz

46 mm

5 KHz

KM20-CTF-5A

Omron

CURRENT TRANSFORMER

PANEL MOUNT

BAR PRIMARY

D7.9XH25.3 mm

60 Cel

-20 Cel

41.3 mm

39 mm

.01 KHz

40 mm

5 KHz

KM20-CTF-600A

Omron

CURRENT TRANSFORMER

PANEL MOUNT

BAR PRIMARY

D35.5XH35.5 mm

60 Cel

-20 Cel

92.5 mm

54 mm

.01 KHz

73.5 mm

5 KHz

KM20-CTF-200A

Omron

CURRENT TRANSFORMER

PANEL MOUNT

BAR PRIMARY

D24XH35.5 mm

60 Cel

-20 Cel

75.7 mm

52.5 mm

.01 KHz

55.9 mm

5 KHz

KM20-CTF-400A

Omron

CURRENT TRANSFORMER

PANEL MOUNT

BAR PRIMARY

D35.5XH35.5 mm

60 Cel

-20 Cel

92.5 mm

54 mm

.01 KHz

73.5 mm

5 KHz

KM20-CTF-50A

Omron

CURRENT TRANSFORMER

PANEL MOUNT

BAR PRIMARY

D9.5XH25.5 mm

60 Cel

-20 Cel

48 mm

28.9 mm

.01 KHz

40.5 mm

5 KHz

Current Transformers

Current Transformers (CTs) are electrical devices that are used to measure electrical current in power transmission systems. They are also known as instrument transformers, because they transform the high currents found in power lines into lower currents that can be safely measured by instruments.

The basic principle of a CT is to use the magnetic field generated by the current flowing through a conductor to induce a current in a secondary winding, which is connected to a measuring instrument or a protective relay. The current in the secondary winding is proportional to the primary current, and is typically a lower value, such as 1A or 5A, which is easier to measure.

CTs are typically used in high voltage and high power systems, such as power plants, substations, and industrial facilities, to measure the current flowing through transmission lines, generators, motors, and other equipment. They are also used for protection purposes, such as detecting overcurrents and faults in the system, and triggering circuit breakers to isolate faulty equipment.

CTs come in various shapes and sizes, and are designed for specific current ratings and frequency ranges. They are typically installed around the conductor that carries the current, and connected to the measuring or protective device through insulated leads. Proper installation and maintenance of CTs are critical to ensure accurate and reliable measurements and protection of the system.