IS 11212 : 1985 Direct current resistive volt ratio boxes

1 Scope

1.1 This standard specifies the requirements of dc resistivevolt ratio boxes with fixed ratios and having input voltage up to1.5 kV dc. The class index of these shall be 0.1 or better. Thisstandard shall also apply to the equipment which form the essentialparts of the volt ratio box, prepared or supplied by themanufacturers.

2 References

IS 2 :1960Rules for rounding off numerical values

IS 1248 : Part 1 :1983 Specification for direct actingindicating analogue electrical measuringinstruments and their accessories:Part 1 General requirements

IS 1248 : Part 8 :1984Specification for direct actingindicating analogue electrical measuringinstruments and their accessories: Part 8 Accessories

IS 1885 : Part 11 :1966Electrotechnical vocabulary:Part 11 Electrical measurements

IS 9000 : Part 5 : Sec 1 :1981 Basic environmental testing proceduresfor electronic and electrical items:Part 5 Damp heat (cyclic) test,Section 1