Modeling Electromechanical Overcurrent Relays Using Singular Value Decomposition

Table 3

Summary of the SVD results for the IAC51 relay.

TDS	Max_Err/M	Max_Err%/M	AV	AV%
1	4.05/1.8	0.48/41.4	0.53	0.19
4	3.62/2.2	0.16/3.9	0.28	0.03
7	5.08/2.8	0.15/3.9	0.50	0.03
10	8.73/2.2	0.20/12.1	0.89	0.04

TDS: time dial setting; Max_Err/M: maximum absolute values of errors in millisecond in multiples of tap value current; Max_Err%/M: maximum absolute values of percentage errors in multiples of tap value current; AV: average of absolute values of errors in milliseconds; AV%: averages of absolute values of percentage errors.