Modeling the Causes of Power-Related Network Outages Using Discrete-Time Markov Chains

Table 1

Measures of central tendency.

	Number of outages	Mean	Median	5% Trimmed mean
AC circuit breakers	186	67.04	37	45.29
AC transfer switch	190	66.95	49	56.16
Batteries	304	48.60	14	21.86
Commercial AC	138	47.93	29.50	39.76
Communication equip.	18	45.28	40.50	40.81
DC fuse/CB	37	92.35	58	66.39
Environmental systems	20	358.95	284	324.69
Fuel issues	140	1,027.82	56	67.71
Generators	1,404	70.23	45	53.09
Hybrid failure	104	71.28	47	57.08
Rectifiers	183	94.24	57	73.40
Temperature	32	35.19	31.50	32.31