Miniature Current Transformer
Miniature Current Transformer

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

DescriptionMiniature Current Transformer
Structure Of WindingToroidal
PhaseSingle, Three
Input / Output10~600A/1~40mA
Max. Current10~600 A
Turns Ratio1:1000~25000
Burden (Rb)5~100 Ω
Accuracy Class0.05/0.1/0.2 Class
Core InsideDC Immune Dual Core
EncapsulationPlastic/Metal Case, Double Insulation
Busbar TypeNone/Built-in Busbar
Mounting MethodScrew Fixing, Through Hole
ApplicationMeters, Instruments
Accept CustomizedYes

Specifications

Miniature Current Transformer
Miniature Current Transformer
Model ( Part Number )Input/OutputCurrent Rating(A)Turns RatioID(Hole) (mm)OD(Dist.) (mm)HT (mm)
MS60-25A5(60)A/2mA601:2500Φ9Φ3014
MSB80-20A10(80)A/5mA801:20002-Φ5Φ24.6(16.5)15
MSB80-20B10(80)A/5mA801:20002-Φ5Φ24.6(20)15
MPB80-25A5(80)A/2mA801:25002-Φ6.532 (18)30
MS100-10A10(100)A/10mA1001:1000Φ9Φ2916.5
MSB100-10A5(100)A/5mA1001:10002-Φ7.4Φ28(32.5)18
MSB100-10B10(100)A/10mA1001:10008 (5)Φ27(21.9)16.5
MT100-10A10(100)A/10mA1001:1000Φ10Φ2817
MT100-10B10(100)A/10mA1001:1000Φ10Φ2817
MT100-10C10(100)A/10mA1001:10002.8*8.8Φ2817
MSB100-25A5(100)A/2mA1001:25002-Φ5.2Φ26 (16)14.5
MS120-20B10(120)A/5mA1201:2000Φ20Φ3716
M-1A10~600A/1~40mA10~6001:1000~25000Φ3~80Φ10~1006~50
M-1B10~600A/1~40mA10~6001:1000~25000Φ3~80Φ10~1006~50
M-1C10~600A/1~40mA10~6001:1000~25000Φ3~80Φ10~1006~50
M-1D10~600A/1~40mA10~6001:1000~25000Φ3~80Φ10~1006~50
M-1E10~600A/1~40mA10~6001:1000~25000Φ3~80Φ10~1006~50
M-1F10~600A/1~40mA10~6001:1000~25000Φ3~80Φ10~1006~50
M-1H10~600A/1~40mA10~6001:1000~25000Φ3~80Φ10~1006~50

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.

Miniature Current Transformer