Staco Energy FirstLine, User Manual, Page: 37 / 43

FirstLine UPS
Form No. 003-2323 Rev B 33
If the UPS has an internal battery, connect it to the DC input connector. If there is an
external user supplied battery disconnect device, it should be closed. At the external
battery cabinet, measure the dc voltage from the left-hand fuse (positive lead of meter) to
the right-hand fuse (negative lead of meter). The voltage measured should be positive. If
not, the polarity of the connections is not correct. (The voltage measured during this
procedure should be in the range of 400 to 470 Vdc, depending on the state of charge of
the battery). Repeat this measurement for the other Extended Battery Cabinets, if present.
The battery plugs for all strings in the Extended Battery Cabinet(s) can be connected at this
time.
If the UPS does not have an internal battery, start by connecting the plug from the lowest
battery string in the Extended Battery Cabinet to the plug from the input/output panel. If
there is an external user supplied battery disconnect device, it should be closed. Measure
the voltage at the external battery terminal block in the UPS with the positive lead of the
meter on the left-hand terminal and the negative lead of the meter on the right-hand
terminal. The voltage measured should be positive. If not, the polarity of the connections is
not correct. If there is a second Extended Battery Cabinet, measure the dc voltage in that
cabinet from the left-hand fuse (positive lead of meter) to the right-hand fuse (negative lead
of meter). The voltage measured should be positive. If not, the polarity of the connections is
not correct. Repeat this measurement for the third Extended Battery Cabinet, if present.
The battery plugs for all strings in the Extended Battery Cabinet(s) can be connected at this
time.
Stopping the Rectifier in the UPS
Before connecting any batteries to the UPS, the rectifier must be stopped. The rectifier is
stopped whenever the UPS is OFF. The batteries are disconnected whenever the optional
disconnect breaker(s) in the Extended Battery Cabinet(s) is (are) open, or whenever the
external user supplied battery disconnect device is open. If the Extended Battery Cabinet(s)
is(are) equipped with the optional disconnect breaker, it is possible for a breaker to be
opened during operation, which requires that the rectifier be stopped before closing the
breaker. If the external user supplied battery disconnect device is opened during operation,
it is necessary to stop the rectifier before closing the device. All breakers should be closed
when the UPS is started. Generally, the only reason to open any of the battery disconnect
devices is to perform service, which requires that the UPS be turned off. It is best to close
the disconnect devices before starting the UPS and leave them closed during operation. In
the event of an emergency condition that requires opening a disconnect device, it will be
necessary to stop the rectifier in order to restore the system to normal configuration.
The simplest way to stop the rectifier is to turn off the UPS by pressing the power ("line-
circle") button on the front panel. This will remove power from the load. Once the battery
breaker(s) has (have) been closed, the UPS can be restarted by pressing the power button.
If the UPS is connected to the load using a Maintenance Bypass Switch (MBS), the load
can be maintained when the UPS is turned OFF.