Imperfect harmony | Archive Titles

Table 1: HF lighting load harmonics summary – case study 1
	Voltage (V)	Current (A)
RMS	245·1	65·39
Peak	336·5	158·08
DC offset	-0·4	-0·35
Crest	1·37	2·42
THD% rms	5·98	43·54
THD% fund	5·99	48·37
Hrms	14·7	28·42
K factor	8·77

Table 2: Communications room distribution board current and distortion – case study 2
	Red	Yellow	Blue
Current (A rms)	24	41	53
THD (% fundamental)	50	40	31
Voltage (V rms)	237	238	237
THD (% fundamental)	8	8	8·26