The JLSZ-6/12/36(W) are combined voltage and current instrument transformers. The combination set of combined instrument transformer and measuring meter is called electric measuring tank. The product is used in three-phase systems of rated frequency of 50/60Hz. They are mounted in outdoor service conditions. The rated primary voltage is respectively 6kV, 12kV and 36kV, with rated current ranging from 1A to 1kA. The rated secondary voltage is 100V. And the instrument transformers have four version s with different voltages 6/12/36 kV.