Hi, this is Marvin Li, thanks for your visiting. -I have been worked on electronic meter components field for 16 years. Have worked in production, design, procurement and marketing department.-Participate in the Current transformers and latching relays design and manufacturing. Know well about the requirements of IEC62053-21, IEC61810-1 and 62055-31;-have visited countries: Germany, Spain, Portugal, Netherlands, France, Italy, India, Russia, Singapore, Thailand. discussed and designed some solutions based on customer's requirements. Currently, we are working on :-Current transformers for electricity meters; ( DC immune CT and Non-DC immune, shielded Current transformers for Electricity meters );- Low voltage Current transformers, split core current transformers;- Single phase, two pole and three phase 40A, 60A, 80A,100A,120A latching relays;- Metal links, like shunts, copper links for electricity meters;- Meter enclosures, Wall-mounted,Din rail single phase and three phase electronic electricity meters.-My company TOPRO Technology, is a leading CT and relays manufacturer in China. Welcome to write me, if you have a question ( Email : marvin@toproteches.com)