pof_132kv_cb {CNAIM} R Documentation

## Current Probability of Failure for 132kV Switchgear

### Description

This function calculates the current annual probability of failure per kilometer 132kV Switchgear 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_132kv_cb(
cb_asset_category = "132kV CB (Air Insulated Busbars)(ID) (GM)",
placement = "Default",
number_of_operations = "Default",
altitude_m = "Default",
distance_from_coast_km = "Default",
corrosion_category_index = "Default",
age,
measured_condition_inputs,
observed_condition_inputs,
reliability_factor = "Default"
)

### Arguments

 cb_asset_category String The type of 132kV asset category placement String. Specify if the asset is located outdoor or indoor. number_of_operations The number of operations for duty factor 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_132kv_cb(
cb_asset_category = "132kV CB (Air Insulated Busbars)(ID) (GM)",
number_of_operations = "Default",
placement = "Default",
altitude_m = "Default",
distance_from_coast_km = "Default",
corrosion_category_index = "Default",
age = 10,
observed_condition_inputs =
list("external_condition" =
list("Condition Criteria: Observed Condition" = "Default"),
"oil_gas" = list("Condition Criteria: Observed Condition" = "Default"),
"thermo_assment" = list("Condition Criteria: Observed Condition" = "Default"),
"internal_condition" = list("Condition Criteria: Observed Condition" = "Default"),
"indoor_env" = list("Condition Criteria: Observed Condition" = "Default"),
"support_structure" = list("Condition Criteria: Observed Condition" = "Default"),
"air_systems" = list("Condition Criteria: Observed Condition" = "Default")),
measured_condition_inputs =
list("partial_discharge" =
list("Condition Criteria: Partial Discharge Test Results" = "Default"),
"ductor_test" = list("Condition Criteria: Ductor Test Results" = "Default"),
"oil_test" = list("Condition Criteria: Oil Test/ Gas Test Results" = "Default"),
"temp_reading" = list("Condition Criteria: Temperature Readings" = "Default"),
"trip_test" = list("Condition Criteria: Trip Timing Test Result" = "Default"),
"ir_test" = list("Condition Criteria: IR Test Results" = "Default" )),
reliability_factor = "Default")

[Package CNAIM version 1.0.1 Index]