High-voltage oil circuit breaker power factor results should fall within what percentage of the nameplate rating for in-service bushings according to NETA standards?

The standard for high-voltage oil circuit breaker power factor results indicates that the readings should fall within 10% of the nameplate rating for in-service bushings. This standard ensures that the bushing's insulation condition and overall performance are within acceptable operational limits. When bushings operate within this range, it suggests that there are no significant issues with insulation degradation, moisture ingress, or other factors that could compromise the reliability and function of high-voltage equipment. Adhering to this 10% threshold helps in maintaining system integrity and preventing unexpected failures in electrical assets.