Solid-core current transformer type 'W' with a current ratio of 1500/5 and an accuracy class of 0.5 at 15 VA. It has a nominal voltage (primary) of 660 VAC at 50/60 Hz. The short time current for type 'W' is 50 kA for 1 second. It has a dielectric quality of 3 kV/1min and an insulation class of F (155 deg C). The transformer is cast resin encapsulated and has a degree of protection IP40. It can operate in temperatures ranging from -20 deg C to +80 deg C. The cable diameter opening is 114 mm. This transformer has been type tested to AS60044.1:2007 and AS1675:1986 standards.