This standard specifies power supply and demand instrument transformers used in combination with watt-hour meters, reactive watt-hour meters, or maximum demand wattmeters.
JIS C 1736:2003 history
2009JIS C 1736-1:2009 Instrument transformers for metering service -- Part 1: General measuring instrument
2003JIS C 1736:2003 Instrument transformers for metering service
1988JIS C 1736:1988 Instrument transformers for metering service