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PEM Rogowski Coil CWT Mini_MiniHF Product Document Datasheet.pdf
“High Performance Rogowski Current Transducers”, W. F. Ray and C. R. Hewson.pdf
PEM CWT Rogowski Coil Technical Note - Low-Frequency Performance CWT-Technical-notes-Low-Frequency-performance-Probemart.pdf
PEM CWT Rogowski Coil Technical Note - Delay and Rise Time CWT Technical Note – Delay and Rise TimeProbemart.pdf
PEM CWT Rogowski Coil Application Note application_notes-Probemart.pdf
PEM CWT Integrator Module Fuse Replacement Instructions for CWT Integrator Module Fuse ReplacementProbemart.pdf
ABB drives – Technical guide No. 5 – Bearing currents in modern AC drive systems.pdf
PEM CWT Application Article High Performance Rogowski Current Transducers-W.F.Ray C.R.Hewson Probemart.pdf
PEM CWT Minimum Measurable Current Application Article -Probemart.pdf
PEM CWT Accurate Measurement in High-Power Motor Power Conversion Application -Probemart.pdf
PEM CWT Rogowski Coil Immunity to Coupled Voltage Interference Technical Note CWT-Technical-notes-Voltage-immunity-Probemart.pdf
PEM Rogowski Coil - A Next-Generation Current Probe for High-Speed, High-Power Measurements -Chrise Hewson.pdf
PEM- Rogowski Coil Practical Fast-Switching Current Measurement in Power Electronics Chris Hewson, APEC-March-2015.pdf
PEM CWT Mini and MiniHF are produced by the globally renowned Roche current probe brand PEM,
CWT Mini series Roche current coils feature a smaller form factor and nearly zero insertion impedance.
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CWT Mini & MiniHF main performance parameters:
peak current: 30A - 30kA peak current
output: ±6.0V (full scale)
bandwidth (3dB): 30MHz
accuracy (typical): up to ±0.2% at the center position
operating temperature range: 0°C to +40°C (integrator);
–40°C to +125°C (CWT MiniHF coil);
–20°C to +100°C (CWT Mini coil).
coil length: 100 or 200mm (customizable length
coil insulation: 2kV peak (3.5mm wire diameter); 5kV peak (4.5mm wire diameter)
lead length: 1m, 2.5m, or 4m (customizable length
Power supply: AA battery, 12V DC power adapter
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CWT Mini & MiniHF Main features:
Traceable calibration data (including certificates)
non-contact measurement has no effect
on the circuit under test no magnetic material means excellent linearity
completely isolates DC current, allowing testing of small ripple currents on large DC
Long-term voltage withstand up to 5kV (2kV withstand for CWT Mini 3.5mm wire diameter)
Overcurrent range will not cause damage (not exceeding the absolute maximum di/dt)
——— Related Applications ———
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| Model | Peak Current (A) | High Frequency Bandwidth (MHz) | Low Frequency Cut-off (Hz) | Peak di/dt (kA/µs) | Sensitivity (mV/A) | Noise (mV) |
|---|---|---|---|---|---|---|
| CWTMINIHF015 | 30 A | 30 / 23 MHz | 150 Hz | 2.0 kA/µs | 200 mV/A | 15 mVrms (p-p, peak-to-peak) |
| CWTMINIHF03 | 60 A | 30 / 23 MHz | 100 Hz | 4.0 kA/µs | 100 mV/A | 11 mVrms (p-p, peak-to-peak) |
| CWTMINIHF06 | 120 A | 30 / 23 MHz | 75 Hz | 8.0 kA/µs | 50 mV/A | 8 mVrms (p-p, peak-to-peak) |
| CWTMINIHF1 | 300 A | 30 / 23 MHz | 50 Hz | 20 kA/µs | 20 mV/A | 6 mVrms (p-p, peak-to-peak) |
Note: Noise values are mV p-p (peak-to-peak)