Eaton PDI WaveStar TFA STS 250-600A, Инструкция по установке и эксплуатации

Страница: 17 / 150

Eaton PDI WaveStar TFA Static Transfer Switch Installation and Operation Manual P-164001113—Rev 01 3
C Chhaapptteerr 22 S Syysstteem m D Deessccrriippttiioonn
This manual describes installation and operation of the Eaton ® PDI WaveStar ® TFA Static Transfer Switch 250-
1200A 3-Pole. “TFA” stands for “True Front Access”. The TFA Static Transfer Switch (TFA STS) requires front
access only for installation, operation, service, and infrared scanning. The TFA STS is a three-pole, two-position
transfer device that transparently transfers, automatically or manually, an output load between two 3-phase
input power sources.
22..11 B Baassiicc C Chhaarraacctteerriissttiiccss
Purpose The purpose of a Static Transfer Switch (STS) is to keep power supplied to a downstream mission-
critical load by switching between redundant power sources.
While a site UPS removes power anomalies originating between the power station and the site, an STS
mitigates the effects of anomalies between the Uninterruptible Power Supply (UPS), utility power source, or
another source and the STS load. These anomalies include the following:
• Loss of an upstream utility or UPS source
• Out of specification power from a power source
• Faulty transformers in PDUs
• Circuit breaker nuisance tripping
Transfer Switch The TFA STS is a standalone transfer switch with two AC input sources and one AC output
load. The TFA STS transparently transfers the output load automatically from one power source to the other, if
the active source fails or goes out of specification, or manually by operator directive, for testing or
maintenance.
Static Transfer Switch Unlike electromechanical transfer switches, an STS has no moving parts. It uses
semiconductor technology, specifically silicon controlled rectifiers (SCRs), as power switching elements,
achieving faster transfers.
Sources The two input AC power sources should be independent power sources that are nominally of the
same voltage, phase rotation, and frequency. Inputs are usually from uninterruptible power supplies (UPSs),
but can be utility power sources, transformer outputs, or PDU outputs.
Output load The TFA STS has a single AC output that supplies redundant power to downstream loads.
3-pole The TFA STS switches a 3-phase AC load between the two AC sources. The neutral wire is not
switched.
Primary and Secondary Systems A TFA STS can be integrated with a PDU on output in a primary system or
integrated with two PDUs on input in a secondary system. The TFA STS cabinet is line-and-match with Eaton
PowerHub 2 and PowerPak 2 PDUs.
NOTE The term PDI in this manual refers to products previous manufactured by Power
Distribution, Inc. All service and support for these features are now supplied by Eaton.
22..22 S Sppeecciiffiiccaattiioonnss
22..22..11 EEnnvviirroonnm meennttaall O Oppeerraattiinngg S Sppeecciiffiiccaattiioonnss
• Operating temperature range: 0° to 40°C
• Operating altitude:
– Up to 5000 feet above sea level without de-rating.
– Above 5000 feet, output current is de-rated by 6% per 1000 feet.