标准号:IS 5142-1969
发布日期:1969/10/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This standard covers natural dry type and oil immersed manually operated, torroidally wound continuously variable voltage auto-transformers. Motor operated variable voltage auto-transformers and variable voltage auto-transformers having a partial variation of output voltage are not covered in this standard.