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

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Eaton PDI WaveStar TFA Static Transfer Switch Installation and Operation Manual P-164001113—Rev 01 67
C Chhaapptteerr 99 O Oppeerraattiioonnaall M Mooddeess
The STS has three modes of operation:
• Normal
• Redundant
• Bypass
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For normal operation, the MODE OF OPERATION toggle switch on the ROI panel should be set to NORMAL .
The STS should be left in Normal mode for all but unusual circumstances. (See Figure 41 , Redundant Operator
Interface (ROI).)
In Normal mode, when the active source falls out of specification, transfer to the other power source is
automatic. There are three (3) operational choices that govern automatic transfers:
1. Transfer algorithm: choose between VSS or POG ; default= VSS . (See paragraph
11.2 Switch Settings Screen , and 2.4 Transfer Process: Algorithms .)
2. Preferred Source : choose whether Source 1 or Source 2 is the preferred power source; default= Source 1
(see Figure 39 Home screen).
3. Retransfer = Yes or No : after a transfer to the alternate source (i.e., the non-preferred source), should the
STS automatically retransfer back to preferred source when that source is good or remain on the alternate
source? Default=
Yes (See paragraph 11.2 Switch Settings Screen ).
99..11..11 P Prreeffeerrrreedd S Soouurrccee
In Normal mode operation, the load is connected to the designated Preferred Source by default, if the voltage
and frequency of all phases of that source are within acceptable limits.
• At initial startup, Source 1 is the default Preferred Source .
• The Preferred Source can then be set by a logged-in user with at least operator access privileges on the
Home screen.
• Either input power source can be designated as the Preferred Source by the setting the Preferred
Source – 1 / 2 virtual control on the Home screen.
• When the Preferred Source fails—that is, when the Preferred Source goes outside acceptable predefined
limits—the STS transfers the load to the alternate source using the chosen algorithm, VSS or POG.
99..11..22 R Reettrraannssffeerr C Coonnttrrooll
The Retransfer control determines whether the STS maintains an affinity for the Preferred Source whenever it
is within acceptable parameters.
Retransfer = Yes:
• If Retransfer = Yes , the load has an affinity for the Preferred Source. After transferring the load to the
alternate source, when the Preferred Source returns to a condition that is within tolerance for at least the
preset adjustable retransfer time delay, the load will be automatically be retransferred back to the
Preferred Source.
• The load will always be transferred to the Preferred Source whenever the source is in-tolerance—no
matter how long the Preferred Source takes to come back within specification—and will remain connected
to the Preferred Source until it fails or a transfer is manually initiated.
• Retransfer = Yes is the default setting for this control.
Retransfer = No: