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An assortment of thermal fuses. A thermal cutoff is an electrical safety device (either a thermal fuse or thermal switch) that interrupts electric current when heated to a specific temperature. These devices may be for one-time use (a thermal fuse), or may be reset manually or automatically (a thermal switch).
The thermoelectric effect is the direct conversion of temperature differences to electric voltage and vice versa via a thermocouple. [1] A thermoelectric device creates a voltage when there is a different temperature on each side.
The state change equation of the conductor, using its thermal features (absorptivity, emissivity) converts data on span geometry into valid temperature data for the "ruling span" of the monitored section. If weather conditions are more favorable than those used for the calculation of static limits, a margin probably exists.
Because both the thermal and electrical conductivity correlate with the charge carriers, new means must be introduced in order to conciliate the contradiction between high electrical conductivity and low thermal conductivity, as is needed. [23] When selecting materials for thermoelectric generation, a number of other factors need to be considered.
Electrical to thermal low-end systems ~ 20%; high-end systems ~ 40–50% Incandescent light bulb: Electrical to radiative ~ 80% wall-plug efficiency [35] 0.7–5.1% luminous efficiency [36] Light-emitting diode (LED) Electrical to radiative 4.2–53% [37] [failed verification] [dubious – discuss] Fluorescent lamp: Electrical to radiative
Electrical heating systems occur less commonly and are practical only with low-cost electricity or when ground source heat pumps are used. Considering the combined system of thermal power station and electric resistance heating, the overall efficiency will be less than for direct use of fossil fuel for space heating. [1]
Electrical contact resistance is also called interface resistance, transitional resistance, or the correction term. Parasitic resistance is a more general term, of which it is usually assumed that contact resistance is a major component.
In electrical engineering, Neher–McGrath is a method of estimating the steady-state temperature of electrical power cables for some commonly encountered configurations. By estimating the temperature of the cables, the safe long-term current-carrying capacity of the cables can be calculated.