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Current Transformers (CT)

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CST4835-100EC
Coilcraft
CURRENT SENSING TRANSFORMERS
Quantity: 8222
Ship Date: 3-5 working days
21+
1+ $1.869
2000+ $1.7444
4000+ $1.6198
- +
x $1.869
Ext. Price: $18.69
MOQ: 10
Mult: 1
SPQ: 2000
CST7030-100LC
Coilcraft
1:100 20A 1.33mH(Min) 16KHz~1MHz 32Vμs SMD SMD mount 7mm(length)*3mm(height)
Quantity: 336
Ship Date: 3-5 working days
24+
1+ $2.4531
2000+ $2.2896
4000+ $2.126
- +
x $2.4531
Ext. Price: $24.53
MOQ: 10
Mult: 1
SPQ: 2000
CS1200L
Coilcraft
1:200 80mH(Min) DIP Through hole mounting
Quantity: 1000
Ship Date: 3-5 working days
25+
1+ $5.8406
2000+ $5.4512
4000+ $5.0619
- +
x $5.8406
Ext. Price: $58.40
MOQ: 10
Mult: 1
SPQ: 2000
CS1050L
Coilcraft
1:50 35A 5mH(Min) 149Vµsec DIP Through hole mounting 9.53mm(length)
Quantity: 10
In Stock
23+
1+ $6.7044
10+ $5.8712
30+ $4.8949
100+ $4.7127
300+ $4.5347
1000+ $4.3395
- +
x $6.7044
Ext. Price: $6.70
MOQ: 1
Mult: 1
SPQ: 200
D1870L
Coilcraft
1:100 20mH(Min) DIP Through hole mounting
Quantity: 2375
Ship Date: 3-5 working days
22+
1+ $3.5043
2000+ $3.2707
4000+ $3.0371
- +
x $3.5043
Ext. Price: $35.04
MOQ: 10
Mult: 1
SPQ: 2000
CST2-100LC
Coilcraft
1:100 2mH(Min) SMD SMD mount
Quantity: 1049
Ship Date: 3-5 working days
24+
1+ $2.1027
2000+ $1.9625
4000+ $1.8223
- +
x $2.1027
Ext. Price: $21.02
MOQ: 10
Mult: 1
SPQ: 2000
CST2010-200LD
Coilcraft
1200 40A 34mH 1KHz~1MHz 508Vμs SMD mount 19.91mm(length)*10.5mm(height)
Quantity: 1243
Ship Date: 3-5 working days
24+
1+ $4.2052
2000+ $3.9249
4000+ $3.6445
- +
x $4.2052
Ext. Price: $42.05
MOQ: 10
Mult: 1
SPQ: 2000
CS1100L
Coilcraft
1:100 20mH(Min) DIP Through hole mounting
Quantity: 532
Ship Date: 3-5 working days
24+
1+ $4.6725
2000+ $4.361
4000+ $4.0495
- +
x $4.6725
Ext. Price: $46.72
MOQ: 10
Mult: 1
SPQ: 2000

Current Transformers (CT)

Current Transformers (CTs) are devices used in electrical power systems to convert high alternating current (AC) to a lower, safer level for measurement and protection purposes. They are essential components in power distribution and control systems.

Definition:
A current transformer is an instrument transformer designed to provide a current that is proportional to the current in a primary circuit. It typically consists of a toroidal core with a primary winding and a secondary winding. The primary winding is connected in series with the load, while the secondary winding is connected to the measuring or protective devices.

Function:
1. Measurement: CTs allow for the accurate measurement of current in high-voltage circuits without the need for high-voltage-rated meters or protection relays.
2. Protection: They are used in conjunction with relays to provide overcurrent, short-circuit, and earth-fault protection in power systems.
3. Control: CTs enable the control of power flow in circuits by providing feedback to control systems.

Applications:
1. Power Distribution: In substations and distribution boards to monitor and control the flow of electricity.
2. Metering: For billing purposes in utility companies to measure the amount of electricity consumed by customers.
3. Protection Systems: To detect faults and initiate circuit breakers to prevent damage to the electrical infrastructure.

Selection Criteria:
1. Rated Current: The CT should be rated for the maximum current expected in the primary circuit.
2. Accuracy Class: Depending on the application, CTs are classified by their accuracy (e.g., 0.5, 0.2, 0.1 class).
3. Turns Ratio: The ratio of primary to secondary turns determines the current transformation ratio.
4. Insulation Level: Must be suitable for the voltage level of the primary circuit.
5. Environmental Conditions: CTs must be rated for the environmental conditions they will be exposed to, such as temperature, humidity, and pollution levels.
6. Size and Physical Characteristics: The physical size and shape of the CT must be compatible with the installation location and the equipment it is connected to.

In summary, current transformers are vital for the safe and efficient operation of electrical systems, providing a means to measure, control, and protect against electrical faults in high-current applications. Their selection should be based on the specific requirements of the system they will be used in.
Please refer to the product rule book for details.