This function calculates the duty factor for under all types of
cables depending on the maximum
percentage utilisation under normal operating conditions.
The duty factor is used in the deriviation of the expected life of an asset.
expected_life(). For more general information about
the derivation of the duty factor see section 6.6 on page 47 in CNAIM (2017)
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duty_factor_cables( utilisation_pct = "Default", operating_voltage_pct = "Default", voltage_level = "EHV" )
Numeric. The max percentage of utilisation under normal operating conditions.
Numeric. The ratio in percent of operating/design voltage.
String. Specify the voltage level. Options:
Numeric. Duty factor for cables.
DNO Common Network Asset Indices Methodology (CNAIM), Health & Criticality - Version 1.1, 2017: https://www.ofgem.gov.uk/system/files/docs/2017/05/dno_common_network_asset_indices_methodology_v1.1.pdf
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duty_factor_cables(utilisation_pct = "Default", operating_voltage_pct = "Default", voltage_level = "EHV")
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