Section 25-6.044 - Continuity of Service(1) Definitions applicable to this part: (a) "Area of Service." A geographic area where a utility provides retail electric service. An Area of Service can be the entire system, a district, or a subregion of the utility's system in which centralized distribution service functions are carried out.(b) "Average Duration of Outage Events (L-Bar)." The sum of each Outage Event Duration for all Outage Events occurring during a given time period, divided by the Number of Outage Events over the same time period within a specific Area of Service.(c) "Customer Average Interruption Duration Index (CAIDI)." The average time to restore service to interrupted retail customers within a specified Area of Service over a given period of time. It is determined by dividing the sum of Customer Minutes of Interruption by the total number of Service Interruptions for the respective Area of Service.(d) "Customers Experiencing More Than Five Interruptions (CEMI5)." The number of retail customers that sustain more than five Service Interruptions for a specified Area of Service over a given period of time.(e) "Customer Minutes of Interruption (CMI)." For a given Outage Event, CMI is the sum of each affected retail customer's Service Interruption Duration.(f) "Momentary Average Interruption Event Frequency Index (MAIFIe)." The average number of Momentary Interruption Events recorded on primary circuits for a specified Area of Service over a given period of time.(g) "Momentary Interruption." The complete loss of voltage for less than one minute. This does not include short duration phenomena causing waveform distortion.(h) "Momentary Interruption Event." One or more Momentary Interruptions recorded by the operation of a utility distribution interrupting device within a five minute period. For example, two or three operations of a primary circuit breaker within a five minute period that did not result in a Service Interruption is one Momentary Interruption Event.(i) "Number of Customers Served (C)." The sum of all retail customers on the last day of a given time period within a specific Area of Service.(j) "Number of Outage Events (N)." The sum of Outage Events for an Area of Service over a specified period of time.(k) "Outage Event." An occurrence that results in one or more individual retail customer Service Interruptions.(l) "Outage Event Duration (L)." The time interval, in minutes, between the time when a utility first becomes aware of an Outage Event and the time of restoration of service to the last retail customer affected by that Outage Event.(m) "Service Interruption." The complete loss of voltage of at least one minute to a retail customer.(n) "Service Interruption Duration." The time interval, in minutes, between the time a utility first becomes aware of a Service Interruption and the time of restoration of service to that retail customer.(o) "System Average Interruption Duration Index (SAIDI)." The average minutes of Service Interruption Duration per retail customer served within a specified Area of Service over a given period of time. It is determined by dividing the total Customer Minutes of Interruption by the total Number of Customers Served for the respective Area of Service.(p) "System Average Interruption Frequency Index (SAIFI)." The average number of Service Interruptions per retail customer within a specified Area of Service over a given period of time. It is determined by dividing the sum of Service Interruptions by the total Number of Customers Served for the respective Area of Service.(q) "Planned Service Interruption." A Service Interruption initiated by the utility to perform necessary scheduled activities, such as maintenance, infrastructure improvements, and new construction due to customer growth.(2) Each utility shall keep a record of its system reliability and continuity of service data, customers' Service Interruption notifications, and other data necessary for the annual reports filed under these rules. These records and data shall be retained for a minimum of ten years from the filing of each annual report. The utility shall record each Outage Event as planned or unplanned and shall identify the point of origination such as generation facility, transmission line, transmission substation equipment, or distribution equipment. The cause of each Outage Event shall be determined and recorded in a standardized manner throughout the utility. The date and time of the Outage Event and the number of Service Interruptions for the Outage Event shall also be recorded.(3) Each utility shall make all reasonable efforts to prevent interruptions of service and when such interruptions occur shall attempt to restore service within the shortest time practicable consistent with safety.(4) When the service is necessarily interrupted or curtailed, it shall be done at a time which, when at all practicable, will result in the least inconvenience to customers and all such scheduled interruptions shall be preceded by reasonable notice whenever practicable to affected customers. Each utility shall maintain a current copy of its noticing procedures with the Division of Engineering.(5) The provisions of this rule shall not apply to a curtailment or an interruption of service to customers receiving service under interruptible rate classifications when the curtailment or interruption of service occurs pursuant to the affected retail customer's service agreement.Fla. Admin. Code Ann. R. 25-6.044
Rulemaking Authority 366.05(1) FS. Law Implemented 366.03, 366.04(2)(c), (5), 366.05 FS.
New 7-29-69, Formerly 25-6.44, Amended 2-25-93, 11-7-02, 8-17-06.New 7-29-69, Formerly 25-6.44, Amended 2-25-93, 11-7-02, 8-17-06.