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1
O PER AT I O N , M A I N T EN A N C E , A N D I N S TA L L AT I O N G U I D E
2.6.2.2 SOURCE 2 Priority
(No Generator)
The switching sequence can be
summarized in the following steps:
1
Activate test on load (HMI or digital
input)
2
Pre-transfer S2 to S1 delay
3
Check source synchronization
4
Close SOURCE 1 contacts
5
Open SOURCE 2 contacts, start ETT
timer (parallel mode)
6
Post-transfer S2 to S1 delay
The re-transfer sequence can be summa
-
rized in the following steps:
1
Cancel test on load (HMI or digital
input)
2
SOURCE 2 availability timer
3
Pre-transfer S1 to S2 delay
4
Check source synchronization
5
Close SOURCE 2 contacts
6
Open SOURCE 1 contacts, start ETT
timer (parallel mode)
7
Post-transfer S1 to S2 delay
Содержание Zenith ZTG T Series
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