The development background

principle

structure and characteristic of HV live displaying device of field intensity type are presented briefly.Routine test and trial-operation show that the product overcomes the shortcomings of earlier displaying devices

such as weakness of induction type and unsafety

striking of induction type and unsafety

striking of post insulator type

which touches HV live part directily.The device has features of safety

non-striking

strong interference immunity

low price and easy fitting

which can be used in indoor HV electric equipment to avoid maloperations.