Which of the following devices is a least expensive power protection device for filtering the electrical stream to control power surges, noise, power sags, and power spikes?
- Line Conditioner
- Surge Suppressor
- Uninterrupted Power Supply (UPS)
- Expansion Bus
Answer(s): C
Explanation:
A UPS is typically used to protect computers, data centers, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption and/or data loss. UPS units range in size from units designed to protect a single computer without a video monitor to large units powering entire data centers, buildings, or even cities. The following services are provided by a UPS:
1.Power Source: A UPS is placed for those devices that must be protected from blackout, brownout, or other power line events.
2.Line conditioning: A UPS is a least expensive device for filtering the electrical stream to control surges, noise, and spikes.
3.Surge Suppression: It provides protection from power surges and power spikes.
4.Brownout: It prevents from the demand of the electrical power that exceeds the capability of the electrical power supply system and reduces the voltage for everyone.
5.Power Sag: It prevents from a temporary dip in the voltage on the supply line that usually lasts only a fraction of a second.
6.Backup power: It is the primary purpose of a UPS to provide backup electricity to the devices plugged into it for a certain amount of time.
Answer option A is incorrect. A line conditioner is a power protection device intended to improve the quality of the power that is delivered to electrical load equipment . It is also known as a power conditioner or power line conditioner. It is used to filter out the electrical stream to control surges and spikes to eliminate any line electrical noise on the line. It is very expensive as compare to surge suppressor or UPS. It is a device that acts in one or more ways to deliver a voltage of the proper level and characteristics to enable load equipment to function properly.
Answer option B is incorrect. A surge suppressor is a power protection device, which is designed to protect electrical devices from voltage spikes. A surge processor attempts to regulate the voltage supplied to an electric device by either blocking or by shorting to ground voltages above a safe threshold. It uses a component named metal-oxide varistor (MOV) to suppress power surges on the line. A surge suppressor is rated by the amount of energy it absorbs, which is stated in joules. The 200 joules is minimum protection, 400 joules average protection, and 600 or more is excellent suppressor.
Answer option D is incorrect. An expansion bus is made up of electronic pathways, which move information between the code of a computer system, including the CPU and RAM, and peripheral devices. It is a collection of wires and protocols that allows for the expansion of a computer. It has the capability of controlling its own transfer of data to another device, allowing the computer to focus on other tasks. In essence, this device freed ups the computer, allowing for more efficiency.