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DC Immune CT

Inquiry

Taehwatrans DC immune CTs show the same level of reading accuracy in AC operating current and in half rectified DC component. What makes our CTs special compared to anti-tampering purpose-only DC immune CTs in the market is that Taehwatrans DC immune CTs are capable of measuring AC and DC component with high accuracy. The actual current loss keeps less than 0.1% and linearity shows less than 0.05% & 0.03 degrees. So even though it has intrinsic high phase displacement, it has an excellent accuracy to satisfy class 0.5 smart meters in addition to measuring multi harmonics in the high accuracy. The characteristics is the supreme linearity throughout the whole dynamic current range and very low current loss.

DC Immune CT Features Image

Application

- High end DC immune electronic energy meters
- Measurement of DC components in the AC line
- Anti-tampering with


General Features

- Compliant to IEC 61869-2
- Excellent linearity & precision
- Good performance in DC factor
- Nearly same phase displacement throughout the whole dynamic current.
- High Potential voltage 2.5kV per min.
- UL Recognized
- RoHS compliant


Drawing

Standard Accuracy : Class 1.0

PCB Mountable TypeWire
Lead Type

Accurate-DC-Immune-Grade-in-Anti-tampering-Drawing

Standard Accuracy : Class 0.5

Accurate-DC-Immune-Grade-in-Anti-tampering-Drawing

Electrical Property & Dimension

Specification Spec
Model NO Current Ratio Imax Idc DCR(Ω) Ip = 0.25A Ip=5A Linearity @ 0.25-5A range Dimensions(mm)
(±6%) Ratio Error(%) Phase Shift (min) Ratio Error(%) Phase Shift (min) Ratio Error Phase Shfit Window Width Height Thickness
TD35VC 2500:1 72A 40A 107 -0.3±0.5 420'±30' -0.3±0.5 417'±30' 0.1% 3' 6.8 23.5 25.0 11.0
TD35L 2500:1 72A 40A 107 -0.3±0.5 420'±30' -0.3±0.5 417'±30' 0.1% 3' 6.8 26.8 23.6 11.0
TD40V 2500:1 80A 40A 98 -0.3±0.4 250'±20' -0.3±0.4 250'±20' 0.1% 2' 8.9 25.3 27.5 17.0
TD40L 2500:1 80A 40A 98 -0.3±0.4 250'±20' -0.3±0.4 250'±20' 0.1% 2' 11.2 26.9 28.7 17.0
TD61L 2500:1 72A 60A 61 -0.3±0.5 240'±25' -0.3±0.5 240'±25' 0.1% 2' 8.0 31.5 30.5 15.0
TD120V 2500:1 180A 120A 51 -0.25±0.25 240'±25' -0.25±0.25 200'±25' 0.1% 1' 12.9 38.0 39.3 14.0
TD120L 2500:1 180A 120A 51 -0.25±0.25 240'±25' -0.25±0.25 200'±25' 0.1% 1' 12.9 41.3 37.5 14.0
TD77V 2500:1 72A 40A 85 ±0.5 230'±20' ±0.5 220'±20' 0.1% 8' 6.8 23.5 25.0 11.0
TD77L 2500:1 72A 40A 85 ±0.5 230'±20' ±0.5 220'±20' 0.1% 8' 6.9 26.8 23.6 11.0
TD71V/L 2500:1 100A 60A 81 ±0.8 310'±20' ±0.5 310'±10' 0.1% 5' 11.2 26.9 28.7 17.0
TD76V 2500:1 180A 100A 41 -0.5±0.5 230'±20' -0.5±0.5 230'±20' 0.1% 2' 12.9 38.0 39.3 14.0
TD76L 2500:1 180A 100A 41 -0.5±0.5 230'±20' -0.5±0.5 230'±20' 0.1% 2' 12.9 41.3 37.5 14.0

* V : PCB Mountable
* L : Lead Wire

Specification Spec
Model NO Current Ratio Imax Idc DCR(Ω) Ip = 0.25A Ip=5A Linearity @ 0.25-5A range Dimensions(mm)
(±6%) Ratio Error(%) Phase Shift (min) Ratio Error(%) Phase Shift (min) Ratio Error Phase Shfit Window Width Height Thickness
TD41L 2500:1 72A 40A 149 -0.03±0.07 7'±5' -0.03±0.07 5'±5' 0.1% 3' 8.5 31.6 30.1 18.9
TD121L 2500:1 120A 120A 85 -0.03±0.07 7'±5' -0.03±0.07 5'±5' 0.1% 3' 11.0 37.8 35.7 15.6

* V : PCB Mountable
* L : Lead Wire

Secondary Burden & Output Voltage Graph

Secondary Burden & Output Voltage.

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Secondary Burden
& Output Voltage Graph

Secondary Burden & Output Voltage.

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