pof_ehv_fittings {CNAIM} R Documentation

Current Probability of Failure for EHV/132kV Fittings

Description

This function calculates the current annual probability of failure per kilometer EHV Fittings The function is a cubic curve that is based on the first three terms of the Taylor series for an exponential function. For more information about the probability of failure function see section 6 on page 30 in CNAIM (2017).

Usage

```pof_ehv_fittings(
ehv_asset_category = "33kV Fittings",
placement = "Default",
altitude_m = "Default",
distance_from_coast_km = "Default",
corrosion_category_index = "Default",
age,
measured_condition_inputs,
observed_condition_inputs,
reliability_factor = "Default"
)
```

Arguments

 `ehv_asset_category` String The type of EHV asset category `placement` String. Specify if the asset is located outdoor or indoor. `altitude_m` Numeric. Specify the altitude location for the asset measured in meters from sea level.`altitude_m` is used to derive the altitude factor. See page 107, table 23 in CNAIM (2017). A setting of `"Default"` will set the altitude factor to 1 independent of `asset_type`. `distance_from_coast_km` Numeric. Specify the distance from the coast measured in kilometers. `distance_from_coast_km` is used to derive the distance from coast factor See page 106, table 22 in CNAIM (2017). A setting of `"Default"` will set the distance from coast factor to 1 independent of `asset_type`. `corrosion_category_index` Integer. Specify the corrosion index category, 1-5. `age` Numeric. The current age in years of the conductor. `measured_condition_inputs` Named list observed_conditions_input `observed_condition_inputs` Named list observed_conditions_input `conductor_samp = c("Low","Medium/Normal","High","Default")`. See page 146-147, table 192 and 194 in CNAIM (2017). `reliability_factor` Numeric. `reliability_factor` shall have a value between 0.6 and 1.5. A setting of `"Default"` sets the `reliability_factor` to 1. See section 6.14 on page 69 in CNAIM (2017).

Value

Numeric. Current probability of failure per annum per kilometer.

Source

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

Examples

```# Current annual probability of failure for EHV Swicthgear
pof_ehv_fittings(
ehv_asset_category = "33kV Fittings",
placement = "Default",
altitude_m = "Default",
distance_from_coast_km = "Default",
corrosion_category_index = "Default",
age = 10,
observed_condition_inputs =
list("insulator_elec_cond" =
list("Condition Criteria: Observed Condition" = "Default"),
"insulator_mech_cond" =
list("Condition Criteria: Observed Condition" = "Default"),
"conductor_fitting_cond" =
list("Condition Criteria: Observed Condition" = "Default"),
"tower_fitting_cond" =
list("Condition Criteria: Observed Condition" = "Default")),
measured_condition_inputs =
list("thermal_imaging" =
list("Condition Criteria: Thermal Imaging Result" = "Default"),
"ductor_test" = list("Condition Criteria: Ductor Test Result" = "Default")),
reliability_factor = "Default")
```

[Package CNAIM version 1.0.1 Index]