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  2. Ayrton shunt - Wikipedia

    en.wikipedia.org/wiki/Ayrton_shunt

    The selector switch changes the amount of resistance in parallel with R m (meter resistance). The voltage drop across parallel branches is always equal. When all resistances are placed in parallel with R m maximum sensitivity of ammeter is reached. [5] Ayrton shunt is rarely used for currents above 10 amperes. [6] m1 = I1/Im , m2 = I2/Im, m3 ...

  3. Ammeter - Wikipedia

    en.wikipedia.org/wiki/Ammeter

    Traditionally, the meter used with a shunt has a full-scale deflection (FSD) of 50 mV, so shunts are typically designed to produce a voltage drop of 50 mV when carrying their full rated current. Ayrton shunt switching principle. To make a multi-range ammeter, a selector switch can be used to connect one of a number of shunts across the meter.

  4. Current sensing - Wikipedia

    en.wikipedia.org/wiki/Current_sensing

    The common and simple approach to current sensing is the use of a shunt resistor. That the voltage drop across the shunt is proportional to its current flow, i.e. ohm's law, makes the low resistance current shunt a very popular choice for current measurement system with its low cost and high reliability.

  5. Resistor - Wikipedia

    en.wikipedia.org/wiki/Resistor

    An ammeter shunt is a special type of current-sensing resistor, having four terminals and a value in milliohms or even micro-ohms. Current-measuring instruments, by themselves, can usually accept only limited currents. To measure high currents, the current passes through the shunt across which the voltage drop is measured and interpreted as ...

  6. Shunt (electrical) - Wikipedia

    en.wikipedia.org/wiki/Shunt_(electrical)

    A shunt is a device that is designed to provide a low-resistance path for an electrical current in a circuit. It is typically used to divert current away from a system or component in order to prevent overcurrent. Electrical shunts are commonly used in a variety of applications including power distribution systems, electrical measurement ...

  7. Current clamp - Wikipedia

    en.wikipedia.org/wiki/Current_clamp

    An electrical meter with integral AC current clamp is known as a clamp meter, clamp-on ammeter, tong tester, or colloquially as an amp clamp. A clamp meter measures the vector sum of the currents flowing in all the conductors passing through the probe, which depends on the phase relationship of the currents. Only one conductor is normally ...

  8. Moral Injury - The Huffington Post

    projects.huffingtonpost.com/moral-injury/joseph...

    Joseph and One-Six flew to Afghanistan in March 2008 from Camp Lejeune, N.C., and on May 1, assaulted into a suspected Taliban stronghold in a town called Garmsir. There was little resistance. The Marines came home that October and 14 months later, in December 2009, they went again. This time was different.

  9. Electrical measurements - Wikipedia

    en.wikipedia.org/wiki/Electrical_measurements

    Ammeter and Voltmeter on a power supply. Electrical measurements are the methods, devices and calculations used to measure electrical quantities. Measurement of electrical quantities may be done to measure electrical parameters of a system.

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