Engineers have a mission to choose CTs immune to DC for power quality measurement of distributed power HV/LV transformers that are easily affected by DC.
J&D has provided a solution for meter engineers by releasing new current transformers, the ARCT-M Rogowski coil CTs and the IACT series split core CTs. rectangular core transformer
This article was originally published in Smart Energy International Issue 5-2020. Read the mobile-friendly digimag or subscribe to receive a print copy.
ARCT-M series, new split core type DC immunity flexible Rogowski coil CT benefits:
… LOW OFFSET VOLTAGE, NEAR ZERO OFFSET AND GAIN DRIFT, EXCELLENT LINEARITY
JAGUAR IoT meter with Iskra: The Jaguar IoT meter is a revenue-grade power quality meter optimised for distributed resources that have already been, or will be, installed by using ARCT-M series Rogowski coil CTs and JPS series split core CTs. These current transformers are designed to be optimised for IEC61000-430 Class A & IEC61557-12 and for revenue-grade level, while quickly installing CTs in distributed power supply together with JAGUAR IoT meters.
J&D has cooperated with Iskra in Slovenia to realise a specialised power quality meter for distributed resources with Iskra developing the power quality measurement part of the Jaguar IoT meter, and J&D developing the CTs for power quality measurement.
The current inputs of the device can be connected in different ways, depending on the selected CTs.
At this time, the ARCT-M series Rogowski coil (333mV output) is equipped with a highprecision amplification integrator so it can be used for high precision calculation in a wide range from low to high current and shows accurate power quality readings.
In addition, the JPS series split CT (100mA Output) is designed with consideration of harmonic effects and can be used for precision rate calculation in a wide range from low to medium current and shows accurate power quality readings.
The Jaguar IoT (iMC785) meter is a perfect solution for the power quality measurement of distributed energy resources.
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