1. Summary
CTB series current probe is a kind of current probe which can measure DC and AC at the same time. It is a clamp type current sensor which can be opened / closed for AC / DC current measure. Its characteristics include: high precision, typical value 0.3%; good frequency and temperature characteristics; high bandwidth. CTBxxxB series is powered by 12V adaptor, while CTBxxxA need to cooperate with CTB104 (Four channel sensor unit) in operation. With the power analyzer, it can realize power analyze in the high accuracy current measurement.
CTB20A | |
Rated current | AC/DC 20A |
Bandwidth | 1MHz |
Current transfer ratio | 100mV/A |
Maximum input current | Refer to the Current rated value vs. Frequency curve |
Accuracy | Refer to the Accuracy List |
Operating temperature and humidity range | -40℃~85℃, Below 80%RH (No dew) |
Promised accuracy range | 0℃~40℃, Below 80%RH |
Temperature drift coefficient | -40℃~0℃﹑40℃~85℃ Amplitude Sensitivity: Below±0.02% rdg./℃ Offset Voltage:≤±0.01% f.s./℃ |
Diameter of measurable conductor | Φ Below 20 mm |
Conductor position effect | Below ±0.1% rdg. (Input 20A, DC-100Hz, outer diameter 5mm) |
Power supply voltage | ±12V |
Power supply capacity | Below ±200mA (20A/45Hz measurement, power supply ±12V) |
CTB20A Accuracy List
Frequency | Amplitude | Phase |
DC | ±0.3% rdg. ±0.05% f.s. | - |
DC < f ≤ 100 Hz | ±0.3% rdg. ±0.01% f.s. | ±0.1deg. |
100Hz< f ≤ 500 Hz | ±0.3% rdg. ±0.02% f.s. | ±0.2deg. |
500Hz< f ≤ 1kHz | ±0.5% rdg. ±0.02% f.s. | ±0.5deg. |
1kHz< f ≤ 5kHz | ±1.0% rdg. ±0.02% f.s. | ±1.0deg. |
5kHz< f ≤ 10kHz | ±1.5% rdg. ±0.02% f.s. | ±1.5deg. |
10kHz< f ≤ 50kHz | ±2.0% rdg. ±0.02% f.s. | ±(0.5+0.1×f kHz)deg. |
50kHz< f ≤ 100kHz | ±5.0% rdg. ±0.05% f.s. | |
100kHz< f ≤ 300kHz | ±10% rdg. ±0.05% f.s. | |
300kHz< f ≤ 500kHz | ±15% rdg. ±0.05% f.s. | - |
500kHz< f ≤ 1MHz | ±30% rdg. ±0.05% f.s. | - |
