ABB Zenith ZBTS T Series, Installation And Operating Instruction, Page: 15 / 112

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1
Bypass-Isolation Automatic Transfer
Switch, consist of two ABB Zenith Auto-
matic Transfer Switches (TruONE ATS)
from 100A up to 1200A, are used to pro-
vide a continuous source of power for
critical loads. The transformation from
one source to another is performed auto-
matically even in the event that Source 1
voltage falls below preset limits.
System controller PCBA is located inside
of the bottom cabinet door, on control
panel (back side). ABB Zenith Automatic
Transfer Switch is designed for use on
emergency or stanby systems and are
rated for total system or motor loads.
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2. Product Overview
Bypass-Isolation Automatic Transfer Switches, Zenith ZBTS
T-series, from 100 A up to 1200 A, are used to provide a
continuous source of power for critical loads by
automatically transferring from Source 1 power to Source 2
power in the event that Source 1 voltage falls below preset
limits. The Bypass-Isolation features allow the primary
automatic transfer switch to be inspected, tested, and
maintained without interrupting power to the load. They
also provide redundant power transfer if the ATS is disabled
or removed from service.
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Fig. 2.1 Bypass-Isolation Automatic
Transfer Switch, Zenith ZBTS T-series