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  2. Thermistor - Wikipedia

    en.wikipedia.org/wiki/Thermistor

    A degaussing circuit using a PTC thermistor is simple, reliable (for its simplicity), and inexpensive. As heaters, in the automotive industry, to provide cabin heating (in addition to heating provided by a heat pump or the waste heat of an internal combustion engine), or to heat diesel fuel in cold conditions before engine injection.

  3. Thermal cutoff - Wikipedia

    en.wikipedia.org/wiki/Thermal_cutoff

    Another type of thermal switch is a PTC (Positive Temperature Coefficient) thermistor; these thermistors have a "cutting off" temperature at which the resistance suddenly rises rapidly, limiting the current through the circuit. When used in conjunction with a thermistor relay, the PTC will switch off an electrical system at a desired temperature.

  4. Inrush current limiter - Wikipedia

    en.wikipedia.org/wiki/Inrush_current_limiter

    An NTC thermistor's resistance is low at high temperatures. When the circuit is closed, the thermistor's resistance limits the initial current. After some time, current flow heats the thermistor, and its resistance changes to a lower value, allowing current to flow uninterrupted. It is inherently impossible for 100% of supply voltage to appear ...

  5. Inrush current - Wikipedia

    en.wikipedia.org/wiki/Inrush_current

    Another disadvantage is that the NTC thermistor is not short-circuit-proof. Another way to avoid the transformer inrush current is a "transformer switching relay". This does not need time for cool down. It can also deal with power-line half-wave voltage dips and is short-circuit-proof. This technique is important for IEC 61000-4-11 tests.

  6. Self-regulating heater - Wikipedia

    en.wikipedia.org/wiki/Self-regulating_heater

    Since PTC heating elements are a kind of thermistor, they share the same principles of operation. The details depend on the type of material, but a class of materials widely used are crystalline ceramics. During manufacture, dopants are added to give the material semiconductor properties. These materials have somewhat negative temperature ...

  7. ANSI device numbers - Wikipedia

    en.wikipedia.org/wiki/ANSI_device_numbers

    In electric power systems and industrial automation, ANSI Device Numbers can be used to identify equipment and devices in a system such as relays, circuit breakers, or instruments. The device numbers are enumerated in ANSI/IEEE Standard C37.2 Standard for Electrical Power System Device Function Numbers, Acronyms, and Contact Designations.

  8. Circuit breaker - Wikipedia

    en.wikipedia.org/wiki/Circuit_breaker

    A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by current in excess of that which the equipment can safely carry (overcurrent). Its basic function is to interrupt current flow to protect equipment and to prevent fire.

  9. Current–voltage characteristic - Wikipedia

    en.wikipedia.org/wiki/Current–voltage...

    A current–voltage characteristic or I–V curve (current–voltage curve) is a relationship, typically represented as a chart or graph, between the electric current through a circuit, device, or material, and the corresponding voltage, or potential difference, across it.

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