CNAIM (version 2.1.4)

pof_tower_ohl_support_50kv: Current Probability of Failure for Towers OHL support 50kV

Description

This function calculates the current annual probability of failure per kilometer EHV for Towers OHL support 50kV The function is a cubic curve that is based on the first three terms of the Taylor series for an exponential function.

Usage

pof_tower_ohl_support_50kv(
  foundation_type = "Foundation - Fully Encased Concrete",
  paint_type = "Paint System - Paint",
  placement = "Default",
  number_of_operations = "Default",
  altitude_m = "Default",
  distance_from_coast_km = "Default",
  corrosion_category_index = "Default",
  age,
  observed_condition_inputs_steelwork,
  observed_condition_inputs_paint,
  observed_condition_inputs_foundation,
  reliability_factor = "Default",
  k_value = 0.0545,
  c_value = 1.087,
  normal_expected_life = "Default"
)

Value

DataFrame Current probability of failure per annum per kilometer along with current health score.

Arguments

foundation_type

String. Foundation type of the tower foundation_type = c("Foundation - Fully Encased Concrete", "Foundation - Earth Grillage")

paint_type

String. Paint type of the tower foundation_type = c(Paint System - Galvanising, Paint System - Paint )

placement

String. Specify if the asset is located outdoor or indoor.

number_of_operations

Numeric Number of operations for the tower

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. 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. 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.

observed_condition_inputs_steelwork

Named list observed_conditions_input

observed_condition_inputs_paint

Named list observed_conditions_input

observed_condition_inputs_foundation

Named list observed_conditions_input conductor_samp = c("Low","Medium/Normal","High","Default").

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 73 in CNAIM (2021).

k_value

Numeric. k_value = 0.0545 by default. This number is given in a percentage. The default value is accordingly to the CNAIM standard on p. 110.

c_value

Numeric. c_value = 1.087 by default. The default value is accordingly to the CNAIM standard see page 110

normal_expected_life

Numeric. normal_expected_life = "Default" by default. The default value is accordingly to the CNAIM standard on page 107.

Examples

# Current annual probability of failure for Towers
pof_tower_ohl_support_50kv(
number_of_operations = "Default",
placement = "Default",
altitude_m = "Default",
distance_from_coast_km = "Default",
corrosion_category_index = "Default",
age = 10,
paint_type = "Paint System - Galvanising",
foundation_type = "Foundation - Earth Grillage",
observed_condition_inputs_steelwork =
list("tower_legs" = list("Condition Criteria: Observed Condition" = "Default"),
"tower_bracings" = list("Condition Criteria: Observed Condition" = "Default"),
"tower_crossarms" = list("Condition Criteria: Observed Condition" = "Default"),
"tower_peak" = list("Condition Criteria: Observed Condition" = "Default")),
observed_condition_inputs_paint =
list("paintwork_cond" = list("Condition Criteria: Observed Condition" = "Default")),
observed_condition_inputs_foundation =
list("foundation_cond" = list("Condition Criteria: Observed Condition" = "Default")),
reliability_factor = "Default",
k_value = 0.0545,
c_value = 1.087,
normal_expected_life = "Default")