APC SBP Installation Manual download pdf (Page 23)

SBP Operation

Smart-UPS

VT SBP with Power Distribution 10-30kVA, 208V, Installation Manual - 990-4198A 17

Battery back-up operation

The UPS will automatically transfer from normal operation to battery back-up operation in instances

when utility power is lost or degraded. The heavier line shows the flow of battery-supplied power

through the UPS and Q2. Be aware that this transfer of power CANNOT take place when the UPS is

operating in static bypass mode or bypass mode.

Static bypass mode

Static bypass is a temporary operating mode that becomes active during the process of transferring

from normal operation to bypass operation, or from bypass operation to normal operation.

Note

After transferring from normal operation to battery back-up operation, the SBP

switch settings are unchanged: Q1 and Q2 are ON, and Q3 is OFF.

Input

UPS

Static

Bypass

Load

Panel

UPS Input

Bypass

UPS Output

Input

Output

O OFF

I ON

O OFF

I ON

O OFF

I ON

Battery

Note

The user interface on the UPS initiates static bypass mode during transfer from

normal operation to bypass operation. The SBP switch settings remain unchanged:

Q1 and Q2 are ON, and Q3 is OFF.

Input

UPS

Static

Bypass

Load

Panel

UPS Input

Bypass

UPS Output

Input

Output

O OFF

I ON

O OFF

I ON

O OFF

I ON

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APC SBP Installation Manual Page 23

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