PEM RCT AC Current Probe
The PEM AC Current Probes utilize a Rogowski Coil and Matched Analog Integrator to provide accurate non-contact, measurement of AC currents over a very broad frequency range. These flexible “clip-around” Current Probes have very low insertion impedance compared to Current Transformers, (CT), or Hall Current Transducers, are easy to insert in confined spaces and are not damaged by over-current surges. They can be used for measuring ac, pulse or transient current waveforms. Since the PEM Current Probes have no magnetic core they can be used to measure ac current on a conductor with high dc current or in the presence of a high dc magnetic field.
RCTAC Rogowski Coils have a DIN Rail Mounted Integrator for permanent or semi-permanent installation on equipment. They are exceptionally simple to retrofit into existing plant.
For all RCT AC Current Probes the nominal primary current rating is the rms current for a sine wave. The peak current rating is 1.41x the rms current rating.
Features
- Peak Current ratings from 30A to 300kA
- Robust, flexible, clip-around coils
- Integrator included with Rogowski Coil to provide an analog signal accurately proportional to primary current in amplitude and phase
- High voltage isolation and common mode rejection
- Measure ac current even in the presence of a high dc current
- Not influenced by high dc magnetic fields
- Bandwidth from 0.2Hz to 1MHz
- No I*t limitation as with CT
- Both battery (4xAA) and external DC power supply
- CE marked
- Special cryogenic versions
- Special long coil versions
Applications
- Monitoring current waveforms in semiconductor switches
- Development, test and servicing of power electronic equipment.
- Pulsed Power capacitor discharge and magnetic accelerator current measurements
- Welding, motor drive, generator, currents
- Ground currents in rotating machine shafts
- Induction heating and plasma current measurements
- Measuring AC currents in the presence of large DC currents
- Fault monitoring, circuit breaker interuption and lightening strike currents
- Monitor Battery and Capacitor Ripple Current
Tech Support
- RCTrms Technical Notes
- RCTi and RCTI-3ph Accuracy, Calibration and Installation
- RCTi, RCTi-3ph and RCT1A Comparison with instrument class current transformers
- “High Performance Rogowski Current Transducers”, W. F. Ray and C. R. Hewson
- “Next-Generation Current Probes for High-Speed and High Power-Density Applications”, Dr Chris Hewson, Power Electronic Measurements Ltd
- “Power Integrity” by Steve Sandler. See Chapters 5: Probes and 7: Measuring Impedance for applications using PEM Rogowski Coils (purchase of book required).
Pricing
Product Configurator:
Select product options from drop-down menus to quote standard products not normally in stock. For fully custom products, fill in the message box below.
Order Code for all except RCTrms3ph: Type / Current Range / Cable Length / Coil Length
For example: RCTi/250/1/300
Order Code for RCTrms3ph: Type / Output / Current Range / Cable Length / Coil Length
For example: RCTrms3ph/420/2000/1/700
For descriptions of the possible selections, please see the Specifications above.
RCTi AC Current Probe
| Part No. | Description | Price | In Stock |
|---|
RCTi 3 Phase AC Current Probe
| Part No. | Description | Price | In Stock |
|---|---|---|---|
| RCTi-3PH/250/2.5/300 | 3 Phase AC Current Probe, 250A, 0.6 Hz-1MHz, 2.5m cable, 300mm coil circumference | $810.00 | |
| RCTi-3ph/5000/4/500 | 3 Phase AC Current Probe, 5kA, 0.6 Hz-1MHz, 4m cable, 500mm coil circumference | $810.00 |
RCTrms AC Current Probe
| Part No. | Description | Price | In Stock |
|---|---|---|---|
| RCTrms/20x/010/300 | AC Current Probe, 20Arms, 10V out, 12/24vdc, 11Hz-100kHz, 300mm coil circumference. Note: This is a custom model coil for monitoring ac ripple current superposed on high dc current. | $500.00 | |
| RCTrms/250/1/300 | AC Current Probe, 250Arms, 4-20mA Output, 2Hz-100kHz, 1m cable, 300mm coil circumference | $500.00 |
RCTrms 3 Phase AC Current Probe
| Part No. | Description | Price | In Stock |
|---|
RCT1A AC Current Probe
| Part No. | Description | Price | In Stock |
|---|
Re-Calibration
Note: Calibration on new product is discounted 50%.
New PEM Rogowski Coils include a Manufacturer’s Calibration Certificate at no extra charge.
| Part No. | Description | Price | In Stock |
|---|---|---|---|
| OL-17025-500A-AC | 17025 Accredited Calibration, Current Transducer, Full-scale Range between 0 and 500Arms, 50-400Hz, https://gmw.com/quality/ | $300.00 | |
| OL-17025-500A-AC-ADD | Calibration of Additional Transducer | $150.00 | |
| OL-17025-2000A-AC | 17025 Accredited Calibration, Current Transducer, Full-scale Range between 501 and 2000Arms, 50-400Hz, https://gmw.com/quality/ | $400.00 | |
| OL-17025-2000A-AC-ADD | Calibration of Additional Transducer | $200.00 | |
| OL-17025-8000A-AC | 17025 Accredited Calibration, Current Transducer, Full-scale Range between 2001 and 8000Arms, 50-400Hz, https://gmw.com/quality/ | $500.00 | |
| OL-17025-8000A-AC-ADD | Calibration of Additional Transducer | $250.00 |
Repair
| Part No. | Description | Price | In Stock |
|---|---|---|---|
| RECOIL-RCT | Recoil (replace damaged coil) and Recalibrate
| $820.00 | |
| RECOIL-RCTi-3ph | Recoil (replace damaged coil) and Recalibrate
| $750.00 |
Terms and Conditions
Quantity Discount Schedule:
| Quantity | 1 – 9 | 10 – 24 |
| Discount | 0% | 5% |
Terms and Conditions:
Prices above are for domestic deliveries to Canada, USA and Mexico only.
Prices are expressed in U.S. Dollars, FCA San Carlos, California.
Prices are subject to change without notice.
Higher quantity and OEM discounts are available.
Payment:
Visa, MasterCard, Amex, Prepayment before shipment, or Net 30 days (subject to credit
acceptance).
Delivery:
Items in stock shipped next business day. All other items are 8-10 weeks.