DC Immune CT Current Transformer Sensors
Customized Current Transformers with DC immunnity are available upon request
Tianjin Carel Tech DC immune CTs or DC immune current transformer sensors 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 Tianjin Carel Tech 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 can be used in smart meter, energy meter, Ammeter etc
All our DC immune CT can be customized, DC immune CT 40A , DC immune CT 60A , DC immune CT 80A , DC immune CT 120A, DC immune CT 200A etc
Features of DC immune current transformer CT
Excellent linearity & precision
Steady phase shift & no satuation in DC factor
Steady from the external magnetic field
Possible to adopt the permanent magnetic immunity
High potential voltage from 2.5Kv to 4Kv/minute
ROHS compliant
Excellent stability % sensitivity in miniature current
Super accuracy for 0.1 &0.2 and 0.5 class meter grade
DC immune current transformer Sensor CT Applications
Precision DC immune electronic energy meters confroming to IEC62053-21(former IEC61036)
Smart grid application
accurate measurement under DC components & anti-tampering
Immunity to DC magnets for requirements
In home display (home energy management system)
DC immune Current transformer sensors CT
Multiple models to choose
GJD-KXR-054 Small Ring Type Current Transformer series
Dimensions in (mm)
| A | B | C | D | E | F | G | H | J | K | M |
| 75.5 | 92 | 74.5 | 39 | 17 | 73 | 3 | 6 | 19 | 9.5 | 70 |
| Primary current(A) | Secondary current(mA) | Load resistance(Ω) | Accuracy |
| 2.5(200) | 1 | ≤20 | 0.05/0.1 |
| 20(100) | 8/10 | ≤20 | 0.05/0.1 |
| 20(200) | 8/10 | ≤20 | 0.05/0.1 |
| 30(200) | 10/12 | ≤20 | 0.05/0.1 |
Special features
Specially used for large current round meter, fully enclosed and integrated design
Easily to install onto the case of the round meter. It can be made single phase three wires or single phase two wires
Nice appearance, fire-retardant case and epoxy resin encapsulated
With DC immunity
GJD-KXR-025 Precision Ring Core Current transformer series
Dimensions (in mm)
| A | B | C | D | F | G | H | J | K | M |
| 32 | 20 | 9.7 | 14 | 30.5 | 3.5 | 8.5 | 32 | 2.3 | 6.2 |
| 32 | 20 | 8.8 | 13 | 30.5 | 3.5 | 8.5 | 32 | 1.8 | 5.2 |
| 32 | 20 | 9.7 | 14 | 30.5 | 3.5 | 8.5 | 32 | 2.5 | 6.2 |
| 32 | 20 | 10.5 | 15 | 30.5 | 3.5 | 8.5 | 32 | 2.5 | 6.2 |
| 32 | 20 | 10.5 | 15 | 30.5 | 3.5 | 8.5 | 32 | 3.5 | 6.2 |
| Primary current(A) | Secondary(mA) | Load resistance(Ω) | Accuracy |
| 10(60) | 4/5/10 | ≤20 | 0.1/0.2 |
| 20(80) | 8/10/12 | ≤20 | 0.1/0.2 |
| 10(100) | 4/5/10 | ≤20 | 0.1/0.2 |
| 20(120) | 5/10/12 | ≤20 | 0.1/0.2 |
Special features
Linearity output current and there are multiple accuracy class to choose
Nice appearance, fire-retardant case and epoxy resin encapsulated
With DC immunity
Small in size to save space, and it can meet different installation size requirements
FDC-KXR-011 Low Cost Current Transformer for energy meter series
Dimensions in (mm)
| A | B | C | D | F | G | H | J | K | M |
| 32 | 20 | 9.7 | 14 | 30.5 | 3.5 | 8.5 | 32 | 2.3 | 6.2 |
| 32 | 20 | 8.8 | 13 | 30.5 | 3.5 | 8.5 | 32 | 1.8 | 5.2 |
| 32 | 20 | 9.7 | 14 | 30.5 | 3.5 | 8.5 | 32 | 2.5 | 6.2 |
| 32 | 20 | 10.5 | 15 | 30.5 | 3.5 | 8.5 | 32 | 2.5 | 6.2 |
| 32 | 20 | 10.5 | 15 | 30.5 | 3.5 | 8.5 | 32 | 3.5 | 6.2 |
| Primary current(A) | Secondary current(mA) | Load resistance(Ω) | Accuracy |
| 10(60) | 4/5/10 | ≤20 | 0.1/0.2 |
| 20(80) | 8/10/20 | ≤20 | 0.1/0.2 |
| 10(100) | 4/5/10 | ≤20 | 0.1/0.2 |
| 20(120) | 5/10/20 | ≤20 | 0.1/0.2 |
Special features
Linearity output current and there are multiple accuracy class to choose
Nice appearance, fire-retardant case and epoxy resin encapsulated
With DC immunity
Small in size to save space, and it can meet different installation size requirements
GJD-KXR-031 PCB Mount CT Transformer series
Dimensions in (mm)
| A | B | C | D | E | F | G | J | K | M |
| 33.5 | 1 | 5 | 30 | 9 | 10.2 | 27.9 | 7.6 | 17.8 | 2.5 |
| 31 | 1 | 5 | 29 | 8 | 9 | 20 | 9 | 19 | 2.5 |
| Primary current(A) | Secondary current(mA) | Load resistance(Ω) | Accuracy |
| 5(40) | 2/2.5/5 | ≤20 | 0.1/0.2 |
| 10(60) | 4/5/10 | ≤20 | 0.1/0.2 |
| 20(80) | 8/10/20 | ≤20 | 0.1/0.2 |
| 10(100) | 4/5/10 | ≤20 | 0.1/0.2 |
| 20(120) | 5/8/10/20 | ≤20 | 0.1/0.2 |
Special features
Linearity output current and there are multiple accuracy class to choose
DC immune CT PCB mounted directly and also can be used with electrical brush wire terminal
Nice appearance, fire-retardant case and epoxy resin encapsulated
With DC immunity & different ratio current output is relizable
Small in size to save space, and it can meet different installation size requirements
FDC-KXR-060 Primary Bar CT Current Transformer series
Dimensions in (mm)
| A | B | C | D | E | F | G | H | K |
| 40 | 12.5 | 10 | 7 | 29.7 | 2.5 | 6.5 | 21 | 2 |
| Primary current(A) | Secondary current(mA) | Load resistance(Ω) | Accuracy |
| 5(60) | 2/2.5/5 | ≤20 | 0.1/0.2 |
| 20(80) | 5/8/10/20 | ≤20 | 0.1/0.2 |
Special features
Linearity output current and there are multiple accuracy class to choose
The case of the electrical meter can be installed on directly
Nice appearance, fire-retardant case and epoxy resin encapsulated
Small in size to save space, and it can meet different installation size requirements
With DC immunity
FDC-KXR-078 DC Immune Current Sensor Transformer series
Dimensions in (mm)
| A | B | C | D | E | F | G | H | I | J | K |
| 21.6 | 35 | 13.5 | 71 | 6.8 | 15 | 86.5 | 13 | 2 | 3.5 | 6 |
| Primary current(A) | Secondary current(mA) | Load resistance(Ω) | Accuracy |
| 5(60) | 2/2.5/5 | ≤20 | 0.1/0.2 |
| 20(80) | 5/8/10/20 | ≤20 | 0.1/0.2 |
Special features
Linearity output current and there are multiple accuracy class to choose
The case of the electrical meter can be installed on directly
Nice appearance, fire-retardant case and epoxy resin encapsulated
Small in size to save space, and it can meet different installation size requirements
With DC immunity
FDC-KXR-104 Busbar CT Current Transformer series
Dimensions in (mm)
| A | B | C | D | E | F | G | H | J | K |
| 55 | 27.5 | 20 | 7.5 | 5.2 | 35.2 | 13.6 | 2 | 3.5 | 4.8 |
| 59 | 28.5 | 20 | 8.5 | 6.2 | 36.5 | 13.6 | 2.5 | 3.5 | 4.8 |
| Primary current(A) | Secondary current(mA) | Load resistance(Ω) | Accuracy |
| 5(40) | 2/2.5/5 | ≤20 | 0.1/0.2 |
| 5(60) | 2/2.5/5 | ≤20 | 0.1/0.2 |
| 20(80) | 5/8/10/20 | ≤20 | 0.1/0.2 |
| 10(100) | 4/5/10 | ≤20 | 0.1/0.2 |
| 20(120) | 5/8/10/20 | ≤20 | 0.1/0.2 |
Special features
Linearity output current and there are multiple accuracy class to choose
The case of the electrical meter can be installed on directly
With DC immunity
Requires to block low requency magnetic field and external constant magnetic field
FDC-KXR-084 Toroidal Current Transformer Coil series
Dimensions in (mm)
| A | B | C | D | E | F | G | J |
| 27 | 20/21 | 4 | 7.5 | 4.2 | 26 | 2.5 | 3.5 |
| 28.8 | 20 | 5 | 8.8 | 5.2 | 29.5 | 1.8 | 3.5 |
| 29.5 | 20 | 6 | 9 | 6.2 | 34 | 2.2 | 3.5 |
| 29.5 | 20 | 6 | 9 | 6.2 | 36 | 2.3 | 3.5 |
| Primary current(A) | Secondary current(mA) | Load resistance(Ω) | Accuracy |
| 1.5(9) | 1.5 | ≤20 | 0.1/0.2 |
| 5(60) | 2/2.5/5 | ≤20 | 0.05/0.1/0.2 |
| 20(80) | 5/8/10/20 | ≤20 | 0.05/0.1/0.2 |
| 10(100) | 4/5/10 | ≤20 | 0.1/0.2 |
| 20(120) | 5/8/10/20 | ≤20 | 0.1/0.2 |
Special features
Linearity output current and there are multiple accuracy class to choose
Nice appearance, fire-retardant case and epoxy resin encapsulated
With DC immunity
GJD-KXR-024 Miniature Current Transformer series
Dimensions in (mm)
| A | B | C | D | E | F | G | H | J | K |
| 19 | 27 | 7 | 28.5 | 12 | 4.2 | 3.5 | 28.5 | 8.5 | 2.5 |
| 20 | 27 | 7 | 28.5 | 12 | 4.2 | 3.5 | 28.5 | 8.5/11.5 | 2.5 |
| 22.5 | 30.2 | 7 | 28.5 | 12 | 4.2 | 3.5 | 28.5 | 8.5 | 2.5 |
| Primary current(A) | Secondary current(mA) | Load resistance(Ω) | Accuracy |
| 1.5(6) | 1.5 | ≤20 | 0.1 |
| 1.5(9) | 1.5 | ≤20 | 0.1 |
| 1.5(12) | 1.5 | ≤20 | 0.1 |
| 5(20) | 2.5/5 | ≤20 | 0.1 |
Special features
Linearity output current and there are multiple accuracy class to choose
The case of the electrical meter can be installed on directly
Nice appearance, fire-retardant case and epoxy resin encapsulated
Small in size to save space, and it can meet different installation size requirements
With DC immunity
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