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lab equipment overview
lab equipment overview

... Although an "ideal" voltmeter would act like an open circuit (no current through the meter) and an ideal ammeter would act like a short circuit (no voltage across the meter), the instruments actually available for these measurements cannot be perfect. This means that the multimeter may actually load ...
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... Load Frequency Characteristicsa Normally, loads are a function of frequency. For example, a fan driven by an induction machine slows down and consumes lesser power if frequency is reduced. In the previous lecture we saw that a system will settle to a frequency at which load(+losses) and generation i ...
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... Although an "ideal" voltmeter would act like an open circuit (no current through the meter) and an ideal ammeter would act like a short circuit (no voltage across the meter), the instruments actually available for these measurements cannot be perfect. This means that the multimeter may actually load ...
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... FADC AD9252 supplies are currently sourced using a 2.5v intermediate voltage. There is one low voltage dropout regulator, LDO, per FADC. These will now be connected directly to the external +5v linear power supply. The increase in voltage drop will cause an increase in temperature in the LDO. The po ...
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... Next, have you seen all the little blue caps around a circuit board? Those small value caps (usually 0.1uf 50 v or 104) are also used to remove noise from electronic circuit. Then what about the function of big filter capacitors we have just mentioned above-aren’t they already removed the unwanted ...
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Islanding

Islanding refers to the condition in which a distributed generator (DG) continues to power a location even though electrical grid power from the electric utility is no longer present. Islanding can be dangerous to utility workers, who may not realize that a circuit is still powered, and it may prevent automatic re-connection of devices. For that reason, distributed generators must detect islanding and immediately stop producing power; this is referred to as anti-islanding.The common example of islanding is a grid supply line that has solar panels attached to it. In the case of a blackout, the solar panels will continue to deliver power as long as irradiance is sufficient. In this case, the supply line becomes an ""island"" with power surrounded by a ""sea"" of unpowered lines. For this reason, solar inverters that are designed to supply power to the grid are generally required to have some sort of automatic anti-islanding circuitry in them.In intentional islanding, the generator disconnects from the grid, and forces the distributed generator to power the local circuit. This is often used as a power backup system for buildings that normally sell their excess power to the grid.
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