An uninterruptible power supply is an electrical apparatus that provides emergency power to a load when the mains power source fails. A UPS will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries, super-capacitors, or flywheels. The on-battery runtime of most uninterruptible power sources is relatively short, but sufficient to start a standby power source or properly shut down the protected equipment.
- Battery system
- Power modules / IGBT
- Laminated busbars for reducing inductance
- Batteries, super-capacitors
- Passive standby