JDTC series is recommended to be used with shielding plates inside of meter case. The current transformer complyies with IEC 62053-21 or ANSI C12.20 of meter standard.
JD3AS Series is recommended to be used with a shielding plate in side of meter housing together to make it more accuracy. The current transformer complies with metering standard IEC62053-22.
For detailed information on this range of shielded current transformers please call or email us for a direct reply.