CPC H02J 9/06 (2013.01) [G01R 31/3278 (2013.01); G01R 31/40 (2013.01); H02J 9/062 (2013.01); H02M 3/04 (2013.01); H02M 7/44 (2013.01)] | 29 Claims |
1. An uninterruptible power supply comprising:
a first input configured to receive input power;
a second input configured to receive backup power;
an output configured to be coupled to at least one load, and configured to provide output power from at least one of the first input or the second input to the at least one load;
at least one sensor;
at least one relay; and
at least one controller coupled to the at least one sensor and to the at least one relay, the at least one controller being configured to:
determine, based on stored relay specifications, a total estimated remaining relay lifetime;
receive operational information indicative of operational parameters of operation of the at least one relay from the at least one sensor, the operational information including a current conducted by the at least one relay;
identify, responsive to identifying a switching event of the at least one relay, a load type of a load of the at least one relay;
determine, based on the operational information, an effective number of relay cycles consumed by the operation of the at least one relay;
determine a modified number of remaining relay cycles, the modified number of remaining relay cycles being based on a difference between the total estimated remaining relay lifetime and the effective number of relay cycles consumed; and
output remaining-relay-lifetime information indicative of the modified number of remaining relay cycles.
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