The ELITEpro XC is the ideal tool for performing energy audits, making it easy to capture kWh/kW energy and demand data, and virtually all other relevant energy parameters for diagnostics and monitoring on single and three-phase circuits. It is capable of measuring, storing, and analyzing electrical consumption data which is derived from the current and voltage inputs. While the ElitePro XC is mainly designed and used for AC power circuit monitoring, it can also be used to monitor DC power circuits, as its voltage and current inputs support both AC and DC measurement.
Measuring DC Loads with an ELITEpro XC
The ELITEpro XC’s current input channels are not only restricted the standard 0-333mV AC signals, but will also accept +/-1VDC which can be output from Hall effect DC current sensors. And the main Voltage inputs will also measure DC voltages up to 600VDC. Plus the 4 extra analogue channels can accept any sensor that has a 0-10 V or 4-20 mA output.
What does this mean for DC measurements?
Non-DENT sensors may be used on the current and/or analogue inputs to measure DC loads. Note that when the DC current transducer is connected to the logger’s current input, DC power will be reported by the logger as long as the DC voltage is also connected to the voltage inputs. When the DC current transducer is connected to the extra analogue inputs, DC power will not be reported.
Below are two current sensor options for measuring DC loads with an ELITEpro XC instrument.
USING THE AEMC MR521 AC/DC CURRENT PROBE
The AEMC MR521 can be used either on the CT inputs or the analogue inputs.
USING THE MR521 ON THE CT INPUTS
When using the AEMC MR521 on the ELITEpro XC CT inputs, you may select from two amperage ranges: 100A or 1000A.
1. 150A:10 mV/A range = 100 Amps DC max
2. 1500:1 mV/A range = 1000 Amps DC Max
USING THE MR521 ON THE ANALOG INPUTS
If the CT is used on the analogue inputs, the full 150A or 1500A range can be used, however the ElitePro XC will not calculate the DC power (note you can do power calculations in Excel after exporting the recorded data).
Note that the AEMC MR521 has a 50-hour battery life and a 2-5% accuracy. Also, keep in mind that a minimum of 80VDC is needed to power the ELITEpro XC.
USING THE NK TECHNOLOGIES DT SERIES DC CURRENT TRANSDUCERS
The NK DT Series current transducers can be used on DC currents from 0-50A or 0-100A depending on the NK DT model chosen. The NK DT Series has 3 available output ranges that must be chosen at the time of purchase.
USING THE NK DT ON THE CT INPUTS
If you wish to use the NK DT on the ELITEpro XC CT inputs, select an NK DT model with 333mV out.
USING THE NK DTON THE ANALOG INPUTS
If you wish to use the NK DT on the Device’s analogue inputs, select an NK DT model with 10VDC output.
POWER SUPPLY OPTIONS
The NK DT Series current transducer has two power supply options. If you plan on using the CT with the ELITEpro XC’s CT input channels and power the NK DT transducer via the ELITEpro XC’s 6VDC power out, choose the 5VDC power supply option.
OTHER DC CURRENT & VOLTAGE SENSORS
The ElitePro XC can be used with any DC current sensor that has a +/-1V DC output. It also supports current and voltage sensors with 0-10V / 4-20mA outputs. In addition to the above AMEC and NK branded current sensors, ESIS can source a wide range of DC current transformers and voltage transducers from our global network of suppliers, covering ranges such as 0-4000 A DC, 0-1000V DC, etc.
Article based on DENT Instruments blog post.