Kingsine's products are in use by over 1800 companies worldwide employed in the following industries: electrical power, metallurgy, petrochemical, railway mining and relative scientific research institutions, meter and protective relay factories. Its Relay-Tester is suitable for testing the various relay protection devices from: ABB, Alstom, Schneider, Siemens, GE, SEL, NARI Tech, Sifang and Wuhan University.