# Documentation

 Symbol Name Unit K $K$ Screening factor $K_0$ Coefficient K for a gas under PAC/GIL conditions $K_{02}$ Factor $K_{0.2}$ $K_{06}$ Factor $K_{0.6}$ $K_{10}$ Factor $K_{1.0}$ $k_4$ Thermal conductivity of soil W/(m.K) $K_A$ Coefficient K to calculate in air $k_{air}$ Thermal conductivity of air W/(m.K) $k_{ar}$ Thermal conductivity of armour material W/(m.K) $K_{BICC}$ Constant relating to conductor formation $k_{Boltzmann}$ Boltzmann constant J/K $k_c$ Thermal conductivity of conductor material W/(K.m) $K_{ce}$ Radiation shape factor, conductor to enclosure $K_{cv}$ Convection factor $K_{dyn}$ Corrected dynamic friction coefficient $k_{encl}$ Thermal conductivity of enclosure W/(m.K) $k_{fluid}$ Thermal conductivity of fluid W/(m.K) $k_{gas}$ Thermal conductivity for gas W/(m.K) $K_{GMR}$ Geometric mean radius factor $k_H$ Heinhold characteristic diameter coefficient $k_{ins}$ Thermal conductivity of insulation W/(m.K) $K_k$ Specific short-circuit parameter A.s$^{1/2}$/mm$^2$ $k_l$ Temperature rise factor in air $k_{LF}$ Load loss constant coefficient p.u. $K_{od}$ Diameter ratio object/duct $k_p$ Proximity effect coefficient $K_{par}$ Constant $K_{par}$ (Ovuworie) $k_{pipe}$ Thermal conductivity of fluid-filled pipe W/(m.K) $k_{prot}$ Thermal conductivity of protective cover W/(m.K) $K_r$ Radiation shape factor $k_{r2}$ Temperature rise ratio $\delta\theta_{SPK}/\delta\theta_c$ p.u. $k_s$ Skin effect coefficient $k_{sa}$ Convection factor (Heinhold) $k_{sa,1}$ Factor 1 for convection heat transfer coefficient $k_{sa,2}$ Factor 2 for convection heat transfer coefficient $k_{sc}$ Thermal conductivity of screen material W/(m.K) $k_{sh}$ Thermal conductivity of sheath material W/(m.K) $k_{skid}$ Thermal conductivity of skid wires $k_t$ Temperature rise ratio p.u. $K_t$ Effective emissivity of surface $K_{vermeer}$ Vermeer constant for convection heat transfer $k_w$ Thermal conductivity of water W/(m.K) $K_x$ Factor for fictitious diameter by Neher $k_X$ Number of heat sources crossing