DC Current Transducers for Measuring up to 400A at 1500Vdc
NK Technologies launched a line of DT-BB dc Current Transducers. The new transducers offer a unique design that allows a split-core transducer to be installed over existing bus bars or wire. The transducers can be used to measure the power at voltages up to 1500Vdc produced by a number of solar panels connected together of a grid-connected PV Solar system.
Another potential applications for the devices is dc motor monitoring in which the transducers spot over current conditions before the machine fails, or sense clogged filters or blocked intake to dc-driven pumps.
The transducers are rated to measure dc working voltage up to 1500Vdc. A terminal block connects the power supply and the output signal wires to the sensor. The terminal block plugs into the header, which resides on the top of the sensor.
Four ranges are available from 0A to 100A to 0A to 400A. Three output types include unipolar, bipolar, and bidirectional, and the three industry standard outputs are 4mA to 20 mA, 0mA to 5mA and 0mA to 10mA Vdc. The design places the current sensing components in one housing with the signal conditioning, thereby reducing installation time and improving both accuracy and safety. Standard signal outputs for the transducers are 4mA to 20 mA unipolar or 4mA-12mA-20mA bipolar output, 0mA to 5mA or 10mA Vdc unipolar, or 0mA to 2.5mA to 5mA Vdc or 0mA to 5mA to 10mA Vdc bipolar output, and +/-5mA or +/-10mA Vdc bidirectional output are also available.
The transducers are compatible with most automation and control systems. The externally-powered transducers operate with low voltage 24Vac-dc that is safe and readily available. The transducer's split-core case features a sensing window that offers abundant space for bus bar, single, or multiple conductors. The devices can attach to a bus assembly, snap onto DIN rail (using available adapters), or attach with screws to a panel for secure mounting.