Current Transformers

Current 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.


Current transformers can perform circuit control and perform roles for safety protection and current limiting.


Current transformers are found in:


  • Generating stations,

  • Electrical substations

  • Commercial electric power distribution.

Types of Current Transformers


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.


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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
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RS庫存編號 198-4472
製造零件編號METSECT5DB125
TWD4,075.00
單位
1250:5 - Tropicalise 160mm 99mm 78.4mm 1.25kA 5 A -25°C +60°C - - Surface Mount -
全新
RS庫存編號 198-4481
製造零件編號METSECT5DC400
TWD5,826.00
單位
4000:5 - Tropicalise 160mm 125mm 87mm 4kA 5 A -25°C +50°C - - Surface Mount -
全新
RS庫存編號 198-4501
製造零件編號METSECT5MC025
TWD2,411.00
單位
250:5 32mm Tropicalise 95mm 70mm 65mm 250A 5 A -25°C +60°C - - DIN rail -
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RS庫存編號 198-4470
製造零件編號METSECT5DA150
TWD3,025.00
單位
1500:5 - Tropicalise 94mm 90mm 87mm 1.5kA 5 A -25°C +60°C - - Surface Mount -
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RS庫存編號 198-4473
製造零件編號METSECT5DB150
TWD4,288.00
單位
1500:5 - Tropicalise 160mm 99mm 78.4mm 1.5kA 5 A -25°C +60°C - - Surface Mount -
全新
RS庫存編號 198-4497
製造零件編號METSECT5MB025
TWD1,969.00
單位
250:5 26mm Tropicalise 85mm 60mm 63mm 250A 5 A -25°C +60°C - - DIN rail -
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RS庫存編號 198-4487
製造零件編號METSECT5DE150
TWD4,025.00
單位
1500:5 - Tropicalise 129mm 135mm 85mm 1.5kA 5 A -25°C +50°C - - Surface Mount -
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RS庫存編號 198-4464
製造零件編號METSECT5CC015
TWD1,557.00
單位
150:5 21mm Tropicalise 65mm 44mm 37mm 150A 5 A -25°C +60°C - - DIN rail -
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RS庫存編號 198-4475
製造零件編號METSECT5DB250
TWD4,751.00
單位
2500:5 - Tropicalise 160mm 99mm 78.4mm 2.5kA 5 A -25°C +60°C - - Surface Mount -
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RS庫存編號 198-4484
製造零件編號METSECT5DD150
TWD3,694.00
單位
1500:5 - Tropicalise 116mm 96mm 78.4mm 1.5kA 5 A -25°C +50°C - - Surface Mount -
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RS庫存編號 198-4471
製造零件編號METSECT5DB100
TWD3,871.00
單位
1000:5 - Tropicalise 160mm 99mm 78.4mm 1kA 5 A -25°C +60°C - - Surface Mount -
全新
RS庫存編號 198-4500
製造零件編號METSECT5MB040
TWD2,049.00
單位
400:5 26mm Tropicalise 85mm 60mm 63mm 400A 5 A -25°C +60°C - - DIN rail -
全新
RS庫存編號 198-4506
製造零件編號METSECT5MC080
TWD2,687.00
單位
800:5 32mm Tropicalise 95mm 70mm 65mm 800A 5 A -25°C +60°C - - DIN rail -
全新
RS庫存編號 198-4483
製造零件編號METSECT5DD125
TWD3,508.00
單位
1250:5 - Tropicalise 116mm 96mm 78.4mm 1.25kA 5 A -25°C +50°C - - Surface Mount -
全新
RS庫存編號 198-4505
製造零件編號METSECT5MC060
TWD2,562.00
單位
600:5 32mm Tropicalise 95mm 70mm 65mm 600A 5 A -25°C +60°C - - DIN rail -
全新
RS庫存編號 198-4503
製造零件編號METSECT5MC040
TWD2,460.00
單位
400:5 32mm Tropicalise 95mm 70mm 65mm 400A 5 A -25°C +60°C - - DIN rail -
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RS庫存編號 198-4502
製造零件編號METSECT5MC030
TWD2,435.00
單位
300:5 32mm Tropicalise 95mm 70mm 65mm 300A 5 A -25°C +60°C - - DIN rail -
全新
RS庫存編號 198-4488
製造零件編號METSECT5DE200
TWD4,347.00
單位
2000:5 - Tropicalise 129mm 135mm 85mm 2kA 5 A -25°C +50°C - - Surface Mount -
RS庫存編號 917-6531
製造零件編號LT6CT2001
TWD2,428.00
單位
- - - - - - - - - - 107 x 95 x 25 mm - - -
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RS庫存編號 198-4495
製造零件編號METSECT5MA030
TWD1,898.00
單位
300:5 27mm Tropicalise 80mm 56mm 63mm 300A 5 A -25°C +60°C - - DIN rail -