Tekbox TBMHA1 mains harmonics current coupler
Details
The Tekbox TBMHA1 is a mains harmonics current coupler, designed for compliance and pre-compliance measurements to standards such as IEC 61000-3-2. A REO WKO/CL-P25 AC/DC compensated wideband current transformer sits inside the housing, with the mains line passing through its core aperture. Furthermore, this coupler converts the load current into a proportional output current of 1mA/A, which an EMI receiver or spectrum analyser then reads via the BNC current output.
The TBMHA1 requires an external shunt resistor to convert the output current into a voltage. A 50Ω feed-through termination on the BNC port gives a 50mV/A transducer factor, and the DC to 150kHz range covers the harmonic content of practically every mains-powered device under test. The EU variant ships with a 16A C19 input and a Schuko (CEE7/3) output socket.
Specifications
| Mains input | C19, 16 A |
| Mains output | Schuko (CEE7/3), 16 A |
| Mains voltage range | 100 - 120 V / 200 - 240 V (selector switch) |
| Transducer factor | 1 mA/A (50 mV/A with 50 Ω termination) |
| Max. primary current | 25 A (current transformer); 16 A (socket-limited) |
| Frequency range | DC - 150 kHz |
| Rise time | ≤ 1.5 µs |
| Current output | BNC-female |
| Dimensions | 100 x 118 x 240 mm |
| Weight | 1.4 kg |
Accessories
- 1x 75 cm coaxial cable, BNC-male to N-male (RG223)
- 1x 16 A C19 cold appliance cable
Pros and cons
- DC to 150kHz wideband frequency range
- AC/DC compensated current transformer
- External 50Ω terminations or measurement receivers are sold separately
Downloads
| Tekbox TBMHA1 user manual |  (461.8 KB) | Download |
