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Power Supply Devices and Systems of Relay Protection
book

Power Supply Devices and Systems of Relay Protection

by Vladimir Gurevich
December 2017
Intermediate to advanced content levelIntermediate to advanced
260 pages
7h 13m
English
CRC Press
Content preview from Power Supply Devices and Systems of Relay Protection

4

Uninterruptable Power Supply

4.1 Diversity of Uninterruptable Power Supplies

If the battery chargers (BCs) described in a previous chapter represent an important component of auxiliary DC power supply systems, uninterruptable power supplies (UPSs) are no less important for auxiliary AC power supply systems and in general for systems of 0.4 kV substations and power plants.

There are different varieties of UPSs according to type, principle of operation, and design. According to international standard IEC 62040-3 [1] there are three main types of UPSs:

  • Passive standby, which was formerly called off-line (IEC 62040-3.2.20)

  • • Line interactive (IEC 62040-3.2.18)

  • • Double conversion, which was formerly called online (IEC 62040-3.2.16)

The passive ...

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Publisher Resources

ISBN: 9781466583801