Current transformers and sensors

Current transformer of PT line, based on steel tape wound toroidal core, current transformer of PPT line, based on nanocrystalline tape wound toroidal core and current sensors of PS line, based on high permeability ferrite toroidal cores, are used for galvanic separated AC measurements.

The primary winding is usally set up of one put-through conducting wire, which leads through the inner transformer opening. The secondary winding is buld-in. With the change of primary winding put-through number, you can change the conversion ratio and its current range.

The specification of linearity, current range and conversion slope is valid, when the secondary winding is loaded with the recommended resistor. If the linearity isn't the primary demand, it is possible to change the value of resisor corresponding the demand and thereby to obtain needed conversion slope or maximum current.

Our standard offer consists of current transformer PT4/Vi 1000, precise current transformer PPT4/Vi 1000 and current sensors PS4/Vi 1000, PS2/Vi 200 and PS1/Ve 100.

Datasheets

Prices

Current transformer PT4/Vi 1000 with quality transformer sheet core is optimised for line current measurement in range of 0,3 - 400 A at transfer ratio 1 : 1000. Linearity by 18 Ω load about 1 %. Ratio slope at this resistance is 18 mV/A. Decreasing the range to 120 A with the load increased to 100 Ω results to only slightly worse linearity and ratio slope 100 mV/A.

Isolating voltage 2500 V and middle hole Ø 10 mm.

LINEARITY OF CURRENT TRANSFORMER PT4/Vi 1000

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Precise current transformer PPT4/Vi 1000 with high quality nanocrystalline core is optimised for precise line current measurement up to 40 A at transfer ratio 1 : 1000. Linearity by 50 Ω load significantly less than 1 %. Ratio slope at this resistance is 50 mV/A. Decreasing the range to 30 A with the load increased to 100 Ω results to increased ratio slope 100 mV/A. With the load of 18 Ω the ratio slope drops to 18 mV/A, but the current range increases up to 60 A. If the current limits are obeyed, the change of load resistance does not affect the linearity. By accepting the lower current limit, this transformer could be used as the more accurate and more economical alternative to the PT4/Vi 1000.

Isolating voltage 2500 V and middle hole Ø 10 mm.

Very good technical data requires appropriate signal processing. The convertor example, designed especialy for these transformers, complies with these requirements. (Convertor is only an example and is not available for sale).

LINEARITY OF PRECISE CURRENT TRANSFORMER PPT4/Vi 1000

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Current sensor PS4/Vi 1000 with cost-effective ferrite core is suitable for current sensing up to hundreds of Hz. In current range of 0,5 - 80 A, frequency 50 Hz and load 18 Ω is the ratio linearity about 1 % and the slope 18 mV/A, current ratio 1 : 1000. Decreasing the current to 20 A while the load increased to 100 Ω results to only slightly worse linearity and higher ratio slope 100 mV/A. By accepting the lower current limit, this transformer could be used as the significantly more economical alternative to the PT4/Vi 1000.

Isolating voltage 2500 V and middle hole Ø 10 mm.

LINEARITY OF CURRENT SENSOR PS4/Vi 1000

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Current sensor PS2/Vi 200 with cost-effective ferrite core is suitable for current sensing up to units of kHz. In range of 0,5 - 10 A, frequency 50 Hz and load 1,5 Ω is ratio linearity in units of percent at slope 7,5 mV/A and current ratio 1 : 200.

It is used in current protection circuits, in current control loops, current feedbacks etc. Changing the value of resistance load can approximately adjust the conversion ratio for desired application.

Isolating voltage 2500 V and middle hole Ø 6 mm.

LINEARITY OF CURRENT SENSOR PS2/Vi 200

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Current sensor PS1/Ve 100 with cost-effective ferrite core is suitable for current sensing up to units of kHz. In range of 0,3 - 3 A, frequency 50 Hz and load 1,0 Ω is ratio linearity in units of percent at slope 10 mV/A and current ratio 1 : 100.

It is used in current protection circuits, in current control loops, current feedbacks etc. Changing the value of resistance load can approximately adjust the conversion ratio for desired application.

Isolating voltage 2500 V and middle hole Ø 4 mm.

LINEARITY OF CURRENT SENSOR PS1/Ve 100

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