Shenzhen Greenfair Electronics Co., Limited
| Packaging Details | carton box, plastic blister box |
| core | high permeability Permalloy core or aminated silicon steel core |
| material | inflammable epoxy resin and case |
| application | low temperature rise |
| function | electronic energy meter, power transducer,etc |
| wire | 2UEW 130℃ copper wire |
| turns | 1000Ts~1000Ts |
| winding | two |
| ROHS | PB free |
| Brand Name | Greenfair |
| Model Number | Current transformer |
| Certification | CE, UL, ISO14001 |
| Place of Origin | China |
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Product Specification
| Packaging Details | carton box, plastic blister box | core | high permeability Permalloy core or aminated silicon steel core |
| material | inflammable epoxy resin and case | application | low temperature rise |
| function | electronic energy meter, power transducer,etc | wire | 2UEW 130℃ copper wire |
| turns | 1000Ts~1000Ts | winding | two |
| ROHS | PB free | Brand Name | Greenfair |
| Model Number | Current transformer | Certification | CE, UL, ISO14001 |
| Place of Origin | China | ||
| High Light | industrial current transformers ，mini current transformer | ||
Nice quality high permeability Permalloy core or aminated silicon steel core Current transformer widely applied in electronic energy meter, power transducer, RTU, etc
For our current transformers, which are produced by using high permeability permalloy core or good quality laminated silicon steel core, inflammable epoxy resin and case with our high precision toroidal winding machine & current transformer testers, steady quality and reliable safety, are widely applied in electronic energy meter, power transducer, RTU, electronical monitoring meter, power factor compensator, digital meter, motor control, industrial control system, electrical meter equipment, etc.
Our precision current transformer's amplitude error and phase error are tested by using high precision tester, elow is the tolerance table:
| Accuracy | Primary current VS rated current percentage (%) | Tolerance | Secondary resistance VS rated resistance percentage (%) | |||
| phase error(%) | phase angle(') | |||||
| 0.01 | 5 | ±0.02 | ±0.6 | 25~100 | ||
| 10~120 | ±0.01 | ±0.3 | ||||
| 0.02 | 10~120 | ±0.04 | ±1.2 | 25~100 | ||
| 10~120 | ±0.02 | ±0.6 | ||||
| 0.05 | 5 | ±0.1 | ±4 | 25~100 | ||
| 10~120 | ±0.05 | ±2 | ||||
| 0.1 | 5 | ±0.4 | ±15 | 25~100 | ||
| 10 | ±0.25 | ±10 | ||||
| 20 | ±0.2 | ±8 | ||||
| 100~120 | ±0.1 | ±5 | ||||
| 0.2 | 5 | ±0.75 | ±30 | 25~100 | ||
| 10 | ±0.5 | ±20 | ||||
| 20 | ±0.35 | ±15 | ||||
| 100~120 | ±0.2 | ±10 | ||||
| 0.5 | 5 | ±1.5 | ±90 | 25~100 | ||
| 10 | ±1 | ±60 | ||||
| 20 | ±0.75 | ±45 | ||||
| 100~120 | ±0.5 | ±30 | ||||
| 1 | 5 | ±3 | ±180 | 25~100 | ||
| 10 | ±2 | ±120 | ||||
| 20 | ±1.5 | ±90 | ||||
| 100~120 | ±1 | ±60 | ||||
| 3 | 50~120 | ±3 | not sure | 50~100 | ||
CT05, CT07, CT10 are micro precise current transformer, which are widely used in power transducers and electrical monitoring systems and RTU, the typical application circuit refers to below drawing. Based on rated primary current, an induced current will be created in secondary; customers can adjust the resistance value in output to get the required output voltage, and capacitor C and rheostat R are used for compensation; if compensation is not required, and capacitor and rheostat are no need to be connected. IC in below drawing is a common operational amplifier; a better operational amplifier can reach a higher precision and better stable function. The accuracy of resistor R in below drawing is required to be less than 1%, and temperature coefficient is less than 50PPM. R=V0/10(KΩ), generally speaking, C is requested between 0.01~0.033uf, R is requested between 150KΩ~300KΩ (R, C can be calculated by without compensated current transformer).
The second application is without operational amplifier in secondary, refer to drawing (2), add a standard resistor RL in secondary, then a linear output voltage can be got. A non-linearity is less than 0.1%, once increased loaded resistance RL, a higher output voltage can be got, linearity will not occur, so, it is better not to choose a higher resistance value which is suggested in this catalogue.
Company Details
Business Type:
Manufacturer,Exporter,Trading Company
Year Established:
2006
Total Annual:
2000000-4000000
Employee Number:
100~400
Ecer Certification：
Active Member
Greenfair Electronics is one of the key electric enterprises in Shenzhen., professional in design and manufacture High Frequency Transformer, Power Transformer, Inductors, EMI equipment, SMT Magnetic Components, Network and Telecommunication Transformers, Automotive and Telecommunication Application... Greenfair Electronics is one of the key electric enterprises in Shenzhen., professional in design and manufacture High Frequency Transformer, Power Transformer, Inductors, EMI equipment, SMT Magnetic Components, Network and Telecommunication Transformers, Automotive and Telecommunication Application...
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