The purpose of this Recommended Practice is to describe the power-factor tip-up of coil insulation and to establish preferred procedures for its measurement.
IEEE No 286-1968 history
2000IEEE 286-2000 Recommended Practice for Measurement of Power Factor Tip-Up of Electric Machinery Stator Coil Insulation
1970IEEE 286-1975 IEEE Recommended Practice for Measurement of Power-Factor Tip-Up of Rotating Machinery Stator Coil Insulation
1968IEEE No 286-1968 IEEE Recommended Practice for Measurement of Power-Factor Tip-Up of Rotating Machinery Stator Coil Insulation