Inter-stage uninterruptible power supply chassis

What is an uninterruptible power supply?

Uninterruptible power supplies provide power to critical loads in the event of a power failure. Unlike emergency generators, UPS systems provide power immediately, but only for a short period of a few minutes – until a backup power supply comes online or until the load completes its shutdown sequence.

Are battery-backed uninterruptable power supplies reliable?

Reliability of power sources is an increasing challenge in many sectors and battery-backed uninterruptable power supplies (UPS) are one option to protect and keep electronic equipment operating in the event of grid power failure.

What is a hybrid static/rotary UPS system?

Hybrid static/rotary UPS systems combine the main features of both static and rotary UPS systems. They have low output impedance, high reliability, excellent frequency stability, and low maintenance requirements . Typical configurations of hybrid static/rotary UPS are depicted in Fig. 18.11. They are usually used in high-power applications.

What is an isolating transformer in a standby UPS system?

In some topologies of standby UPS systems, an isolating transformer is used at the output stage of the UPS. This topology is called ferroresonant standby UPS system. The transformer also acts as a low-pass filter that cancels out switching frequency from the output voltage of the DC/AC inverter.