1. Understanding Asset Conditions and Anomaly Severity
Asset conditions and anomaly severities provide a quick way of assessing the health of your assets and prioritizing issues affecting them.
Properties Asset Conditions and Severities
Asset scores range from 1–100 and are determined by the anomalies observed and their applied severity. After the analysis, points are deducted based upon the anomaly types, severities, and quantities. Note, historical data is considered if the customer provides maintenance documentation.
The table below lists and describes the anomaly severity classifications.
Anomaly Severity
Description
Critical
Indicates a direct threat to the safety of individuals or the integrity of the property, necessitating a repair or resolution without delay.
Priority
Represents a heightened level of concern. Maintenance is necessary for the asset, and while work can be delayed temporarily, remediation should be scheduled promptly.
Moderate
Maintenance may be required but is not considered urgent. Addressing these concerns proactively helps prevent the development of more significant problems in the future.
The resultant inspection scores are split into five condition buckets and can be seen in the table below.
Table of Properties Asset Conditions
Score Ranges
Condition
81-100
Excellent
61-80
Good
41-60
Fair to Good
21-40
Poor to Fair
1-20
Critical
Condition scores are used as an indicator to prioritize maintenance activities across fleets.
Solar Asset Conditions and Severities
Solar Asset Conditions
Solar asset conditions are based on historical, industry-wide performance data that Zeitview has collected over the years. Assets are segmented into quintiles of performance (i.e. 1st-20th percentile, 21st-40th percentile, 41st-60th percentile, 61st-80th percentile and 81st-100th percentile) based on percentage power loss of the site.
The tables below show how asset conditions are assigned to solar farms, inverters, stacks (i.e. Zeitview-defined geospatial regions), and combiners based on the power loss of the anomalies affecting them.
Table of Solar Asset Conditions (Site Capacity ≤ 5 MW DC)
Power Loss (%) - excl. Inverter Outages
Condition
0-0.3
Very Good
0.3-1
Good
1-2
Fair
2-6
Poor
6+
Very Poor
Table of Solar Asset Conditions (Site Capacity > 5 MW DC)
Power Loss (%) - excl. Inverter Outages
Condition
0-0.3
Very Good
0.3-1
Good
1-2
Fair
2-4
Poor
4+
Very Poor
Solar PV Module Anomaly Severities
A PV module’s condition is based on the severity of the anomalies affecting it, and is summarized below.
Table of Solar PV Module Severities
Severity
Types of Issues
Applicable Anomaly Categories
1 – High Priority
2 – Medium Priority
3 – Lowest Priority
Utilities Asset Conditions and Severities
Utility asset conditions and anomaly severities use the same severity scale, where asset conditions are typically assigned a condition that is equivalent to the most severe anomaly identified on the asset. A summary of the conditions and severities are shown below. Note: This summary may not be applicable if your organization has requested a custom severity scheme.
Severity / Condition
Description
Applicable Anomaly Categories
P10
Immediate hazard or active failure requiring dispatch as soon as possible. High potential for electrocution, arc flash, fire, outages, or public safety impact. Urgent Fix ASAP.
Energized wire down (primary/secondary/aerial/spacer/static/fiber); primary cable exposed below 8 ft; pole top split/decay or cracked poles with imminent failure; equipment actively leaking; vegetation directly contacting primary (phase-to-phase or phase-to-ground); conductor floating in a hazardous position.
P20
Serious issues that are not immediately hazardous but could become dangerous or cause outages if left unaddressed. Should be completed in the next scheduled maintenance window. Fix Within 14 Days
De-energized/abandoned wire down; pole steps < 8 ft; broken pole-top extension; excessive slack (depending on conductor type); minor equipment oil leaks; secondary cable exposed < 8 ft; broken guy wire bond; vegetation contacting secondary or neutral; structural brace issues where redundancy remains.
P30
Moderate deterioration or developing issues. Low near-term risk but will worsen if ignored. Included in typical annual maintenance planning. Fix Within 1 Year.
Poles leaning 3–4 ft; major decay/split in arms; slack or floating conductors (varies by type); flashed/tracking insulators; minor conductor hardware deterioration; incorrectly installed preform ties; blown fuses in non-critical areas; vegetation 1–2 ft from primary; vine growth in primary zone; minor guy wire or anchor issues.
P40
Low-severity, long-term maintenance items. Minimal immediate risk but should be corrected to prevent gradual system degradation. Fix Within 3 Years.
Minor conductor slack; pole top decay not near failure; loose bolts or hardware; damaged or loose ridge pins; broken bonds (depending on conductor type); minor rust on steel/tower components; vegetation 3–4 ft from primary; vine growth at secondary/neutral; minor hardware wear or damage.
IO
Documentation-only items requiring no corrective action. Used for tracking aging patterns, environmental effects, or non-impactful system anomalies. Information Only
Foreign attachments; minor pole shell damage; insulator chipping; cosmetic or non-critical contamination; bird/shell damage; dead vines; splices per span >3; rust or cosmetic wear; staging materials; tied-on insulators; non-critical hardware issues.
Wind Asset Conditions and Severities
Severity
Action
Recommended Turbine Status
1 (Cosmetic)
No intervention required.
Continue Operation
2 (Minor)
Repair only if there are other damages to be repaired. Monitor at next Inspection.
Continue Operation
3 (Medium)
Repair within 6 months.
Continue Operation
4 (Serious)
Repair within 3 months.
Continue Operation
5 (Very Serious)
Immediate intervention required to prevent further damage to blade, wind turbine, or surrounding area.
Continue Operation
