Devices that supply power when the commercial utility power system fails are called which of the following?
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A. B. C. D.B.
From Shon Harris AIO Fifth Edition: Protecting power can be done in three ways: through UPSs, power line conditioners, and backup sources.
UPSs use battery packs that range in size and capacity.
A UPS can be online or standby.
Online UPS systems use AC line voltage to charge a bank of batteries.
When in use, the UPS has an inverter that changes the DC output from the batteries into the required AC form and that regulates the voltage as it powers computer devices.
Online UPS systems have the normal primary power passing through them day in and day out.
They constantly provide power from their own inverters, even when the electric power is in proper use.
Since the environment's electricity passes through this type of UPS all the time, the UPS device is able to quickly detect when a power failure takes place.
An online UPS can provide the necessary electricity and picks up the load after a power failure much more quickly than a standby UPS.
Standby UPS devices stay inactive until a power line fails.
The system has sensors that detect a power failure, and the load is switched to the battery pack.
The switch to the battery pack is what causes the small delay in electricity being provided.
So an online UPS picks up the load much more quickly than a standby UPS, but costs more of course.
The correct answer to this question is B. uninterruptible power supplies (UPS).
An uninterruptible power supply (UPS) is a device that provides emergency power to a load when the primary power source, typically the utility power grid, fails or experiences a disruption. A UPS system consists of a battery, an inverter, and a charger.
When the utility power fails or fluctuates, the battery in the UPS immediately supplies power to the inverter, which then converts the DC power from the battery into AC power that the load can use. This provides a seamless transition between the primary power source and the backup power source, ensuring that the load does not experience any interruption.
UPS systems are commonly used to protect critical equipment and applications, such as servers, data centers, and industrial control systems, from power outages and other power-related issues. They can also provide surge protection and voltage regulation to help maintain a stable power supply.
Power conditioners, power filters, and power dividers are all different types of devices that can be used to improve the quality of the power supply, but they do not provide backup power in the event of a power failure like a UPS does. Power conditioners are devices that correct power quality issues such as voltage fluctuations and noise. Power filters are devices that reduce electromagnetic interference (EMI) and radio frequency interference (RFI) in the power supply. Power dividers are devices that divide an incoming power signal into multiple output signals.