User's Manual

Universal Metering Transponder for kV2c™ Meter User Guide 21
Chapter 2 • Functional Description
Power Reliability Indices
The UMT-C-KV registers capture interruption data in the listed categories that can
be used to calculate distribution reliability indices as specified in IEEE Std.1366,
2003 Edition, IEEE Guide for Electric Power Distribution Reliability Indices - a
standard for power reliability within distribution systems, substations, circuits, and
defined regions.
N OTE Some features and capabilities of the transponder may not be supported, or may
be only partially supported by some versions of master station software.
The UMT-C-KV captures power interruption data as follows:
• Time stamped sustained interruption data.
• Time stamped momentary interruption data.
• Time stamped momentary interruption event data.
• Momentary interruption data.
• Sustained Interruption data.
Additional Utility-specific data may be required to properly calculate the
associated Distribution Reliability Indices.
IEEE Standard.1366 defined Distribution Reliability Indices are:
• System Average Interruption Frequency Index (SAIFI)
• System Average Interruption Duration Index (SAIDI)
• Customer Average Interruption Duration Index (CAIDI)
• Customer Average Interruption Frequency Index (CAIFI)
• Customer Total Average Interruption Duration Index (CTAIDI)
• Average Service Availability Index (ASAI)
• Average system interruption duration index (ASIDI)
• Average system interruption frequency index (ASIFI)
• Customers Experiencing Multiple Interruptions (CEMI
n
)
• Momentary Average Interruption Frequency Index (MAIFI)
• Momentary Average Interruption Event Frequency Index (MAIFI
E
)
• Customers Experiencing Multiple Sustained Interruptions and Momentary
Interruption Events (CEMSMI
n
)