Iwatsu SS-293L, Instruction Manual

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Chapter 1 Overview
9
Chapter 1 Overview
1.1 Instrument Overview
This instrument is a current probe that uses the Rogowski Coil as a
sensor.
It allows measurement of current in high-voltage and large-current
facilities, such as train inverters, as well as in high-voltage and
large-current applications such as development and maintenance of
infrastructures of the automotive and other industries.
The coil of this instrument detects a change in magnetic flux caused by
the current (target to be measured) flowing through the inside of the coil
that forms a closed loop. The change in magnetic flux generates an
electromotive force in the coil. The electromotive force is proportional to a
differential value of the current. The output (electromotive force) of the
Rogowski Coil is the differential waveform of the current. To detect the
current waveform, the waveform is integrated by the main unit of this
instrument (for details, refer to Chapter 3 “Measurement Principle”).
This series has four models, which differ in sensitivity (mV/A), peak
current (A), low frequency cutoff (Hz), and other specifications. Each
model has two types, which differ in length of the Rogowski Coil; that is,
this series has a lineup of eight models.
Connecting the output part of this instrument and an oscilloscope and
other monitoring devices with the BNC cable allows observation of the
current waveform that flows through a target to be measured.