Section 12(c) in Bihar Electricity Regulatory Commission (Standards of Performance of Distribution Licensee) Regulations, 2006
(c)[ Harmonics: - (i) Harmonics generated by one consumer may affect the normal operation of another consumer. Therefore on receipt of a complaint from a consumer who cannot carry out normal operations due to large harmonics, the licensee shall investigate the cause and eliminate or reduce the harmonics. This may involve identification of harmonic generating consumers and serving notices on them to instalfilters. Harmonics may cause temporary over voltages and ferro-resonance. These harmonics may cause large neutral current. [Substituted by Bihar Notification No. BERC-SMP 47/2016-04, dated 23.8.2017 (w.e.f. 18.1.2007).](ii)The Licensee shall monitor the voltage harmonics and current harmonics in terms of "Total Harmonic Distortion" (THD), a measure of distortion of the voltage or current wave form (which shall ideally be sinusoidal) and is the square root of the sum of squares of all voltage or current harmonics expressed as a percentage of the magnitude of the fundamental.(iii)In any installations the voltage and current Harmonic Distortion (THD) shall not exceed the limit as specified in the Central Electricity Authority (Technical Standards for connectivity to the Grid) Regulations, 2007, as amended from time to time, applicable to the Distribution Systems. The Consumer will take appropriate measures to restrict the THD to the stipulated limit.(iv)The total harmonic distortion for voltage at the connection point shall not exceed 5% with no individual harmonic higher than 3% and the total harmonic distortion for current drawn from the transmission/sub-transmission system at the connection point shall not exceed 8%.(v)The Licensee shall submit a quarterly report on THD of voltage and current harmonic to the Commission of following type of loads:
