Function; Characteristics - Eaton STS Manual De Instalación Y Usuario

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Presentation

Function

EATON developed STS to guarantee the
uninterrupted operation of your sensitive
equipment. The STS source transfer
switch is a simple and effective solution
to manage the redundancy provided by
two independent power sources.
STS handles the automatic or manual
transfer of your loads between two
independent power sources without
interrupting the supply of power (< 6
milliseconds). Either of the two sources
may be designated as the preferred
source with the other becoming the
alternate source. In the event of a
failure, transfer from one to the other is
automatic and instantaneous.
Automatic transfer to the alternate
source takes place if the voltage of the
preferred source goes outside a tolerance
of 12 % above or below the nominal
value. Return to the preferred source
is automatic when the voltage returns
within the ±12 % tolerance range.
Page 4 - 51027617EN/AI
To provide a maximum level of
protection for the connected sensitive
equipment, both power sources should
be on-line type UPSs. However, the STS
module can also be supplied by one UPS
and another type of source, or by two
non-UPS sources providing a sinusoidal
output (AC system, engine generator set,
etc.).

Characteristics

The STS module has the following
characteristics:
208 / 220 / 230 / 240 V versions (input
z
voltage): STS 16,
120 V version (input voltage):
z
STS 1400,
input current: 16 A (
STS 16), 12 A (STS
z
1400),
protection by thermal circuit breakers
z
(16 A or 12 A depending on the version),
threshold before transfer from
z
preferred to alternate source: ±12 %,
maximum operating temperature:
z
35 °C,
dimensions: 1U x 19 inches (44.45 mm
z
x 482.6 mm);
weight: 5 kg.
z

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