FaithTech FT-SCA series High precision current sensor
- Medical equipment: scanner, MRI
- Electric Power: converter, inverter
- New energy: photovoltaic, wind energy
- Automobiles: electric vehicles
- Ship: electric driven ship
- Measurement: verification and calibration
- Industrial control: industrial motor drive, robot
- Rail transit: high-speed trains, subways, trams and trolleybus
- DC excitation system measurement
FaithTech-Catalogue-2025-version.pdf
- Adopt multi-point zero flux technology, with high precision, small zero offset and high linearity;
- Current range: ±100A/±200A/±300A/±600A/±1000A/±1500A/±2000A/±3000A/±5000A；
- High precision, current precision 10ppm;
- With temperature compensation technology, the temperature stability is 0.2ppm/K;
- AC/DC universal, which can measure AC, DC and pulse current;
- Primary and secondary side isolation measurement;
- No warm-up time;
- Wide band measurement, with the maximum measurement bandwidth of 500kHz;
- Low response time, minimum dynamic response time 1us
| Model | Rated input | Primary overload current | transformation ratio | Rated output of secondary side | Bandwidth | Accuracy | Linearity | Working power supply | Diameter of hole |
| （A） | （A） | （A） | （kHz） | （ppm） | （ppm） | （V） | （mm | ||
| FT-SCA100 | ±100A | ±150A | 1000:1 | ±100mA | 200 | 10 | 5 | ±15Vdc | φ28 |
| FT-SCA200 | ±200A | ±300A | 1500:1 | ±133.333mA | 200 | 10 | 5 | ±15Vdc | φ28 |
| FT-SCA300 | ±300A | ±360A | 1500:1 | ±200mA | 200 | 10 | 5 | ±15Vdc | Φ28 |
| FT-SCA600 | ±600A | ±720A | 2000:1 | ±300mA | 100 | 10 | 5 | ±15Vdc | Φ40 |
| FT-SCA1000 | ±1000A | ±1200A | 2000:1 | ±500mA | 100 | 10 | 5 | ±15Vdc | Φ40 |
| FT-SCA1500 | ±1500A | ±1600A | 2500:1 | ±600mA | 100 | 10 | 5 | ±24Vdc | Φ40 |
| FT-SCA2000 | ±2000A | ±2400A | 2500:1 | ±800mA | 100 | 10 | 5 | ±24Vdc | Φ90 |
| FT-SCA3000 | ±3000A | ±3300A | 3000:1 | ±1000mA | 100 | 10 | 5 | ±24Vdc | Φ90 |
| FT-SCA5000 | ±5000A | ±6000A | 4000:1 | ±1250mA | 100 | 10 | 5 | ±24Vdc | φ121.5 |
FT-SCA series high-precision current sensor is a current sensor that can measure DC, AC, pulse and various irregular waveforms under the condition that the primary side and secondary side are completely isolated. FT-SCA series adopts multi-point zero flux technology to control the excitation flux, DC flux and AC flux in a zero flux closed loop, and realizes the detection of high-frequency ripple by constructing a high-frequency ripple induction channel, so that the sensor has relatively high gain and measurement accuracy in the full bandwidth range.
The FT-SCA series is mainly used in the fields of metrological verification and calibration that require high accuracy, as well as power quality analysis, power analyzer, medical treatment, aerospace, rail transit and other fields that require high sensitivity, stability and reliability.
Multipoint zero magnetic flux technology
The magnetic core reaches the magnetic balance state by excitation. When the measuring current flows through the wire, breaking the magnetic balance, the flux gate will generate the excitation current, and the signal will drive the compensation coil after amplification, so that the magnetic flux in the magnetic core and the magnetic flux generated by the measuring current will cancel each other and remain in the “zero” state, that is, the so-called “zero flux” state.
Dimension
Specification
| Model | FT-SCA100 | FT-SCA200 | FT-SCA300 | FT-SCA600 | FT-SCA1000 | |
| Electrical performance | Electrical performance | |||||
| Rated DC current of primary side（IPN_DC） | ±100A dc | ±200A dc | ±300A dc | ±600A dc | ±1000A dc | |
| Rated AC current of primary side*1（IPN） | 70.5A ac | 141A ac | 211.5A ac | 423A ac | 705A ac | |
| Primary side overload current*2（IPM）(≤1min) | ±150A dc | ±300A dc | ±360A dc | ±720A dc | ±1200A dc | |
| Working voltage（VC） | ±14V～±16V | |||||
| Power consumption current（IPWR） | ±50mA～±200mA | ±50mA～±250mA | ±50mA～±290mA | ±30mA～±390mA | ±60mA～±660mA | |
| Current ratio (KN) (input: output) | 1000:1 | 1500:1 | 1500:1 | 2000:1 | 2000:1 | |
| Rated output current (ISN) | ±100mA | ±133.333mA | ±200mA | ±300mA | ±500mA | |
| Measuring resistance（RM） | 0Ω～30Ω， nominal value20Ω | 0Ω～20Ω， nominal value 15Ω | 0Ω～20Ω， nominal value 15Ω | 0Ω～10Ω， nominal value 7Ω | 0Ω～8Ω， nominal value6Ω | |
| Precision measurement | Precision measurement | |||||
| Accuracy *3（XG） | 10ppm | |||||
| Linearity（εL） | 5ppm | |||||
| Temperature stability（TC） | 0.2ppm/K | |||||
| time-stability（TT） | 0.5ppm/month | |||||
| Power supply anti-interference（TV） | 1ppm/V | |||||
| Zero offset current（IO） | 1ppm@25ºC | |||||
| Ripple current（IN） | 1ppm(DC-10Hz) | |||||
| Dynamic response time（tr） | 1us(di/dt=100A/μs,increase to
90%IPN) |
|||||
| Current change rate（di/dt）(MIN) | 100A/us | |||||
| Frequency bandwidth（-3dB） | DC-200kHz | DC-200kHz | DC-200kHz | DC-100kHz | DC-100kHz | |
| Zero offset current（IOT） | ±2uA | ±3uA | ±5uA | ±5uA | ±5uA | |
| Security features | Security features | |||||
| Isolation voltage/between primary side and secondary side（VD） | 2.5kV（50Hz,1min） | |||||
| Transient isolation withstand voltage/between primary side and secondary side（VW） | 5kV（50us） | |||||
| General characteristic | General characteristic | |||||
| Operating temperature range（TA） | -40℃～85℃ | |||||
| Storage temperature range（TS） | -45℃～85℃ | |||||
| Relative humidity | 20%～80%RH | |||||
| Threading hole diameter（mm） | φ28 | φ28 | φ28 | Φ40 | Φ40 | |
| Weight | 400g±40g | 400g±40g | 400g±40g | 1000g±200g | 1000g±200g | |
| Model | FT-SCA1500 | FT-SCA2000 | FT-SCA3000 | FT-SCA5000 |
| Electrical performance | ||||
| Rated DC current of primary side（IPN_DC） | ±1500A dc | ±2000A dc | ±3000A dc | ±5000A dc |
| Rated AC current of primary side*1（IPN） | 1057A ac | 1410A ac | 2115A ac | 3525A ac |
| Primary side overload current*2（IPM）(≤1min) | ±1600A dc | ±2400A dc | ±3300A dc | ±6000A dc |
| Working voltage（VC） | ±22V～±26V | |||
| Power consumption current（IPWR） | ±60mA～±700mA | ±60mA～±1020mA | ±60mA～±1160mA | ±60mA～±1560mA |
| Current ratio (KN) (input: output) | 2500:1 | 25000:1 | 3000:1 | 4000:1 |
| Rated output current (ISN) | ±600mA | ±800mA | ±1000mA | ±1250mA |
| Measuring resistance（RM） | 0Ω～5Ω， nominal value3Ω | 0Ω～3Ω， nominal value2Ω | 0Ω～3Ω， nominal value2Ω | 0Ω～2Ω， nominal value1Ω |
| Precision measurement | ||||
| Accuracy *3（XG） | 10ppm | |||
| Linearity（εL） | 5ppm | |||
| Temperature stability（TC） | 0.2ppm/K | |||
| time-stability（TT） | 0.5ppm/month | |||
| Power supply anti-interference（TV） | 1ppm/V | |||
| Zero offset current（IO） | 1ppm@25ºC | |||
| Ripple current（IN） | 1ppm(DC-10Hz) | |||
| Dynamic response time（tr） | 1us(di/dt=100A/μs,increase to
90%IPN) |
|||
| Current change rate（di/dt）(MIN) | 100A/us | |||
| Frequency bandwidth（-3dB） | DC-100kHz | |||
| Zero offset current（IOT） | ±4μA | ±5μA | ±5μA | ±4μA |
| Security features | ||||
| Isolation voltage/between primary side and secondary side（VD） | 2.5kV（50Hz,1min） | 5kV（50Hz,1min） | ||
| Transient isolation withstand voltage/between primary side and secondary side（VW） | 5kV（50us） | 8kV（50us） | ||
| General characteristic | ||||
| Operating temperature range（TA） | -40℃～85℃ | |||
| Storage temperature range（TS） | -40℃～85℃ | |||
| Relative humidity | 20%～80%RH | |||
| Threading hole diameter（mm） | Φ40 | Φ90 | Φ90 | Φ121.5 |
| Weight | 700g±100g | 4000g±1000g | 5000g±1000g | 12000g±1500g |
