Which is the correct description of power supply?

The correct answer is Uninterruptible Power Supply.

Key Points

• An Uninterruptible Power Supply (UPS) provides emergency power to a load when the input power source or mains power fails.
• UPS systems are used to protect hardware such as computers, data centers, and telecommunications equipment where an unexpected power disruption could cause injuries, fatalities, or data loss.
• A UPS differs from an auxiliary or emergency power system or standby generator in that it provides near-instantaneous protection from input power interruptions by supplying energy stored in batteries or a flywheel.
• The on-battery runtime of most uninterruptible power sources is relatively short (only a few minutes) but sufficient to start a standby power source or properly shut down the protected equipment.

Additional Information

• Types of UPS Systems:
  • Offline/Standby UPS: Provides basic protection and is the most cost-effective solution. It switches to battery power in the event of a power failure.
  • Line-Interactive UPS: Provides additional protection from minor power fluctuations by regulating the voltage automatically.
  • Online/Double-Conversion UPS: Offers the highest level of protection by continuously converting power through an inverter and rectifier to ensure a consistent supply.
• Components of a UPS:
  • Battery: Stores electrical energy for use in case of a power outage.
  • Inverter: Converts DC power from the battery to AC power for the load.
  • Rectifier: Converts incoming AC power to DC power for charging the battery.
  • Static Switch: Allows for seamless transition between mains power and battery power.
• Benefits of UPS:
  • Data Protection: Prevents data loss and corruption by allowing safe shutdown of equipment.
  • Equipment Protection: Guards against power surges, spikes, and voltage fluctuations.
  • Operational Continuity: Ensures critical operations continue during power outages.
• Applications of UPS:
  • Used in data centers to protect servers and network equipment.
  • Essential in hospitals for powering life-saving medical equipment during power failures.
  • Employed in telecommunications to ensure uninterrupted communication services.