Current Clamps and Transducers
Iron Core Clamp Transducers
The iron-core current clamp works like a transformer. Currents induce on the secondary side, dependant on the turns ratio. Also, like a transformer, this only works for measuring AC currents.
Furthermore, the DS-CLAMP-xxAC offers measurement ranges from 5 ACRMS up to 1000 ACRMS, with a bandwidth up to 10kHz. To top things off, measurement accuracy is from 0.3% to 3.5% depending on measurement range.
Finally, Iron core clamps also function at temps ranging from -40°C to +70°C and measure coil diameters from 50 mm up to 52 mm depending on the model.
Hall-Compensated Current Clamps
Hall Effect Current Clamps measure both the AC and DC currents. They also have high accuracy, bandwidth, AC and DC current measurement and its circuit doesn’t require opening. Furthermore, the DS-CLAMP-xxDC measures ranges up to 1800 A DC and ACrms. These also have a bandwidth of up to 100 kHz.
Finally, Hall compensated clamps also offer measurement accuracy from 1% to 3.5%. They also operate at temperatures ranging from 15°C to 85°C and measure coil diameters of up to 32 mm.
Fluxgate Current Clamps
Fluxgate current sensors use a high permeability magnetic core to ascertain magnetic fields produced as currents flow through a conductor. Because Fluxgate technology depends on the negative feedback circuit; it sends currents back through a feedback coil. As a result, the magnetic flux cancels out. As a result, the effect of the material’s magnetic nonlinearity decreases and can stay low.
Furthermore the DS-CLAMP-xxDC offers measurement ranges up to 1000 A DC and ACrms and has a bandwidth of up to 500 kHz. Fluxgate Current Clamps operate at temperatures ranging from -40°C to 85°C and can measure coil diameters of up to 50mm depending on the model.
Please note, these current transducers require a separate PWR-MCTS2 power supply unit.
Rogowsky Coil Current Probes
Rogowsky coils are easy to install and are perfect for field measurements. There are also a wide variety available. This includes 3 A to 30.000 A ACrms with accuracies down to 0.1 %. Furthermore, bandwidths start from 10 Hz and end at 1 MHz.
Current Shunt DSI Current Adapters
The Current Shunt DSI Current Adapters directly measure currents. They are also compatible with all Dewesoft data acquisition systems that have DSUB9 input connectors. The following DSI shunt current adapters are available:
- DSI-20mA – 20 mA current input adapter with 50 Ohm internal shunt, 0.05% accuracy for sensors with 4 to 20 mA output.
- DSIw-20mA – Waterproof version of the DSI-20mA adapter. It uses a 50 Ω shunt resistor with 0.01 % accuracy and 0.2 ppm/K temperature drift (0.05 ppm/K in the temperature range 0 °C to 60 °C). They sense currents from industrial sensors with 4-20 mA output in harsh environments. It is designed with a double DSUB9 adapter hood with IP67 protection.
- DSI-5A – The new 5A current input adapter. Contains a 10 mΩ shunt resistor with 0.1% accuracy when calibrated. The new DSI-5A adapter has significant improvement is in temperature stability. The new shunt resistor has two times better temperature coefficient (now 15 ppm/K over the range -55 °C to +125 °C, before 30 ppm/K over the range -20 °C to +60 °C).
- DSIi-10A – isolated current transducer with 10 A FS and < 0.5% accuracy with banana connector inputs.
- DSIi-20A – isolated current transducer with 20 A FS and < 0.5% accuracy with banana connector inputs.
Please note isolated voltage input amplifiers connect shunt resistor adapters.
SIRIUS PWR-MCTS2 An Integrated Power Supply
A host-connected amplifier powers most Dewesoft current sensors. Yet, the integrated power supply slice – SIRIUS PWR-MCTS2 is perfect for sensors that require an additional power supply.
SIRIUS PWR-MCTS2 is a power supply unit. This unit powers current transducers directly from the Dewesoft DAQ system without any external power supply. Furthermore, the SIRIUS PWR-MCTS2 is available as a slide-in module for SIRIUS rack mainframe chassis or as a standalone slice in the form of SIRIUS modular chassis.
E-mobility Device With Integrated DC-CT Current Transducer
The SIRIUS XHS-PWR is measures direct in-vehicle currents, voltage and power. It also features an integrated and patented DC-CT current transducer. As a result, users can measure very precise current measurements even in the most demanding applications. This includes high current peaks and leakage currents.
Furthermore, this current transducer represents the latest current sensing technology. Its has bandwidth ranges of 100A, 500A and 1000A. It also has a wide 1 MHz bandwidth and ultimate performance. To top things off it comes with excellent linearity, precision, accuracy, immunity to external magnetic fields, low offsets and extremely low-temperature drift are achieved at low power operation.
Finally, The device can also directly measure voltages up to 2000V peak (CAT II 1000V) with up to 5 MHz bandwidth. This device is also extremely compact and perfect for direct installation into a vehicle with the power lines leading through the device. It has an IP65 degree of environmental protection. Thus making it perfect for harsh environments and rough drives as a result.
Key Features of Current Clamps and Transducers include:
- AC/DC Current Measurement: Dewesoft offers high-accuracy zero-flux current transducers, iron-core current transformer, hall-compensated and iron core current clamps, Rogowski coils, and shunts for AC and DC current measurement.
- High Accuracy: Highly precise zero flux current transducers or fluxgate compensated clamps are a perfect for the most demanding power measurements and E-mobility and electric motor and inverter testing applications.
- Up to 30 000 A: There is a very wide range of current measurement ranges up to 30,000 A.
- -40°C to +85°C: Our current transducers can operate in a wide temperature range. This is ideal for winter (-40°C) or summer climate testing (+85°C).
- Integrated Sensor Power Supply: The majority of current transducers can be powered directly out of the Dewesoft data acquisition devices. Current transducers with a higher power demand such as zero flux transducers and fluxgate transducers require an MCTS. This device can be integrated into an all in one device or be free-standing in the world-renowned SIRIUS chassis.
- Teds Compatibility: The majority of current transducers are TEDS IEEE1451.4 compatible. As a result they are plug and play. Connecting the current transducer to the DAQ device will initiate automatic sensor recognition and settings will be configured automatically. Current transducers with multiple measurement ranges are unfortunately not TEDS IEEE 1451.4 compatible and these have to be manually set up in the software.
- Flexible: There are more than 1000 different current sensors available on the market.