Online, wireless measurement of 3rd harmonic resistive leakage current of HV/EHV surge arresters with system harmonics compensation
SA 30i+, the wireless Leakage Current Analyser from SCOPE is a State of the Art, On-line test system for
Residual Life Assessment of Metal Oxide Surge Arresters. The instrument measures and directly displays
the values of Total Leakage Current and Third Harmonic Resistive Leakage Current. It provides system
harmonic compensation as per IEC 60099-5-B2. It provides Corrected Resistive Leakage Current after
applying correction factors for change in system voltage & temperature.
The SA 30i+ can be pre-loaded with the LA identity details (LA Identiﬁ cation, Type, Serial Number,
Location, Rated Voltage etc.) and tests conducted on the same ID of the arresters are saved under the same
folder. Trend analysis software, SAData picks up this data and stores them in a similar fashion on a PC. This
analysis software enables the user to take a decision to repair/replace the arresters considering safety limits.
SA 30i is designed to work under the hostile electrostatic noise found in live EHV switch yards upto 765 kV.
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