e_cof_tf {CNAIM}

Environmental Consequences of Failure for transformers

Description

This function calculates environmental consequences of failure for all type of transformers. (cf. section 7.5, page 84, CNAIM, 2021). Environmental consequences of failure is used in the derivation of consequences of failure see cof().

Usage

e_cof_tf(
  asset_type_tf,
  rated_capacity = "Default",
  prox_water = "Default",
  bunded = "Default"
)

Arguments

asset_type_tf

String. Transformer types. Options: asset_type_tf = c("6.6/11kV Transformer (GM)", "20kV Transformer (GM)", "33kV Transformer (GM)", "66kV Transformer (GM)", "132kV Transformer (GM)").

rated_capacity

Numeric. The rated capacity for a transformer. For type "6.6/11kV Transformer (GM)" and "20kV Transformer (GM)" use kVA ratings. For "20kV Transformer (GM)", "33kV Transformer (GM)", "66kV Transformer (GM)", "132kV Transformer (GM)" use MVA ratings. A setting of "Default" will result in a size environmental factor of 1 (cf. table 230, page 187, CNAIM, 2021).

prox_water

Numeric. Specify the proximity to a water course in meters. A setting of "Default" will result in a proximity factor of 1. Thus assume the proximity to a water course is between 80m and 120m (cf. table 231, page 188, CNAIM, 2021).

bunded

String. Options: bunded = c("Yes", "No", "Default"). A setting of "Default" will result in a bunding factor of 1.

Value

Numeric. Financial cost of failure for a 10kV 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

# Environmental consequences of failure for a 6.6/11 kV transformer
e_cof_tf(asset_type_tf = "6.6/11kV Transformer (GM)",
rated_capacity = 750, prox_water = 100, bunded = "Yes")