Industrial DCCT (IPCT) - Bergoz Instrumentation - #1

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The Integrated Parametric Current Transformer (IPCT) is a DCCT ... Full scale from +-1 mA to +-5 A factory preset Increased sensitivity with multiple primary turns +-10 V analog output Flat response from DC to 4 kHz 10 ìA rms resolution on any range Large aperture 69 mm (2.7”) Accuracy independent of primary conductor position Withstands high overload and inrush currents 100 times more precise than Hall effect devices To measure: Return ground currents, DC and AC Leakage current, DC and AC Sum of low currents Small difference of high currents Low current at high voltage Power tube electrode currents Electrostatic corona discharge Electrochemically induced currents Standby systems charging currents Operating principle The IPCT works on the principle of the DCCT, invented at CERN, the European Particle Physics Laboratory, by K.Unser in 1969. The DC component of the current flowing through the toroid sensor is detected by a magnetic modulator, also called fluxgate or secondharmonic detector. The AC component is detected by an active Hereward transformer. The two circuits are cascaded in a common feedback loop to generate a magnetic flux which always cancels the primary current flux. The IPCT output is the voltage developed by the feedback current passing through a precision resistor. IPCT Integrated Parametric Current Transformer Non-intercepting DC current measurement with 10 microamps resolution