Miniature current transformers (mini CTs) are special instrument transformers of low voltage which are widely used in the current sensing modules or electrical protective devices, such as energy meters (KWH meters) and so on. The mini current transformer is an important component in the circuit of an electric energy meter (or electricity meter), the device that measures the amount of electric energy consumed. We provides a wide-range of current transformers suitable for energy measuring. Due to the safe galvanic separation in the circuit, they are very suitable for applications of high dynamic range when inrush isolation is required. If safe galvanic is not required, shunt resistor is another choice which costs less. Xianyu’s miniature current transformers have high linearity and low phase error, based on the high permeability nanocrystalline cores and high-quality winding coil.
Ring coil CTs made by solid toroidal cores are the most commonly used. Plastic case (PBT or ABS) bushing type CTs have through-hole big enough for primary wire or busbar or neutral bus. Besides ring type, we also make busbar built-in current transformer which can be easily installed in meter cases by screwing. We can provide built-in or removable busbar type CTs. Both can meet the requirements of the high dielectric.
As a professional manufacturer, we provide different kinds of AC miniature current transformer with the turns ratio range from 1:1000 to 1:25,000. Due to our automatic winding machines, we can provide qualified CTs with good prices. Besides that, when the DC offsets exist in the circuit, DC immune type current transformers are also available.
Miniature Current Transformer
Features
- A variety of encapsulations
- High linearity over the whole current range
- Accuracy up to 0.1 class, low phase error
- Meet the standard IEC 60044-3, JB/T10665
Applications
- Electrical measuring instruments
- Current Monitor
- Energy Measuring
- Electrical protective devices
- Current sensing modules
- Residential or industry meters
- Automotive applications
- Solar Inverter
- Frequency Converter
- SMPS, ASD
Basic Parameters
| Description | Miniature Current Transformer |
| Structure Of Winding | Toroidal |
| Phase | Single, Three |
| Input / Output | 10~600A/1~40mA |
| Max. Current | 10~600 A |
| Turns Ratio | 1:1000~25000 |
| Burden (Rb) | 5~100 Ω |
| Accuracy Class | 0.05/0.1/0.2 Class |
| Core Inside | DC Immune Dual Core |
| Encapsulation | Plastic/Metal Case, Double Insulation |
| Busbar Type | None/Built-in Busbar |
| Mounting Method | Screw Fixing, Through Hole |
| Application | Meters, Instruments |
| Accept Customized | Yes |
Specifications
| Model ( Part Number ) | Input/Output | Current Rating(A) | Turns Ratio | ID(Hole) (mm) | OD(Dist.) (mm) | HT (mm) |
|---|---|---|---|---|---|---|
| MS60-25A | 5(60)A/2mA | 60 | 1:2500 | Φ9 | Φ30 | 14 |
| MSB80-20A | 10(80)A/5mA | 80 | 1:2000 | 2-Φ5 | Φ24.6(16.5) | 15 |
| MSB80-20B | 10(80)A/5mA | 80 | 1:2000 | 2-Φ5 | Φ24.6(20) | 15 |
| MPB80-25A | 5(80)A/2mA | 80 | 1:2500 | 2-Φ6.5 | 32 (18) | 30 |
| MS100-10A | 10(100)A/10mA | 100 | 1:1000 | Φ9 | Φ29 | 16.5 |
| MSB100-10A | 5(100)A/5mA | 100 | 1:1000 | 2-Φ7.4 | Φ28(32.5) | 18 |
| MSB100-10B | 10(100)A/10mA | 100 | 1:1000 | 8 (5) | Φ27(21.9) | 16.5 |
| MT100-10A | 10(100)A/10mA | 100 | 1:1000 | Φ10 | Φ28 | 17 |
| MT100-10B | 10(100)A/10mA | 100 | 1:1000 | Φ10 | Φ28 | 17 |
| MT100-10C | 10(100)A/10mA | 100 | 1:1000 | 2.8*8.8 | Φ28 | 17 |
| MSB100-25A | 5(100)A/2mA | 100 | 1:2500 | 2-Φ5.2 | Φ26 (16) | 14.5 |
| MS120-20B | 10(120)A/5mA | 120 | 1:2000 | Φ20 | Φ37 | 16 |
| M-1A | 10~600A/1~40mA | 10~600 | 1:1000~25000 | Φ3~80 | Φ10~100 | 6~50 |
| M-1B | 10~600A/1~40mA | 10~600 | 1:1000~25000 | Φ3~80 | Φ10~100 | 6~50 |
| M-1C | 10~600A/1~40mA | 10~600 | 1:1000~25000 | Φ3~80 | Φ10~100 | 6~50 |
| M-1D | 10~600A/1~40mA | 10~600 | 1:1000~25000 | Φ3~80 | Φ10~100 | 6~50 |
| M-1E | 10~600A/1~40mA | 10~600 | 1:1000~25000 | Φ3~80 | Φ10~100 | 6~50 |
| M-1F | 10~600A/1~40mA | 10~600 | 1:1000~25000 | Φ3~80 | Φ10~100 | 6~50 |
| M-1H | 10~600A/1~40mA | 10~600 | 1:1000~25000 | Φ3~80 | Φ10~100 | 6~50 |
Note:
The above data are selected from some popular models we produce. Please contact us for detail datasheet. We can also design some special miniature current transformers to meet customers’ requirements.