ABO Series (8 frames) perfect designed plastic case current transformer, advanced snap on body, high accuracy (up to Class 0.2S), humanization transparent cover and lead seal hole design makes the CT very easy to indentify after long term use and perfect anti-stealing electricity. Features 1:Safe, easy to install, portable 2:Wide inner window, allowing clamping of big cables or bus-bars 3:Wide range of sizes to accommodate all the existing installations Applications: 1:Current measurement, monitoring and protection for electrical wiring and equipment. 2:Current and power measurement for electric motors, lighting, air compressor, heating and ventilation system, air-condition equipment and automation - control system. 3:Current, power and energy monitoring device. 4:Relay protection device.