duty_factor_transformer_11_20kv {CNAIM}

Duty Factor for 6.6/11kV and 20kV Transformers

Description

This function calculates the duty factor for 6.6/11kV and 20kV transformers 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. See e.g. expected_life(). For more general information about the derivation of the duty factor see section 6.6 on page 51 in CNAIM (2021)

Usage

duty_factor_transformer_11_20kv(utilisation_pct = "Default")

Arguments

utilisation_pct

Numeric. The max percentage of utilisation under normal operating conditions.

Value

Numeric. Duty factor for 6.6/11kV or 20kV transformer.

Source

DNO Common Network Asset Indices Methodology (CNAIM), Health & Criticality - Version 2.1, 2021: https://www.ofgem.gov.uk/sites/default/files/docs/2021/04/dno_common_network_asset_indices_methodology_v2.1_final_01-04-2021.pdf

Examples

duty_factor_transformer_11_20kv(utilisation_pct = 95)