User`s manual

25
Defender 3 Online Emergency Lighting Inverter User’s Manual
#018-7150-03 Rev NR
Whole Cabinet – Two Strings of 45 Batteries
Figure 10
The positive and negative ter-
minal blocks in the inverter
cabinet are grouped by polarity.
This ensures positive and
negative string connections are
not inadvertently shorted to-
gether. Each cabinet string has
a separate run back to the in-
verter cabinet. Each cabinet
string should be brought online
one at a time by setting the
string’s circuit breaker to the ON position. Verify that the breaker does not trip, since that would
indicate a swapped string connection. If you have any further questions about battery connections
please contact DSPM Service Department: at 1(877)377-6769.
6.1.A. CHARGING OF THE BATTERIES: The Emergency Lighting Inverter System charges its battery
whenever it is connected to utility power and the input circuit breakers (CB1) is turned on. Discon-
nect charging source prior to connecting or disconnecting battery terminals. For the best results,
charge the battery for 24 hours after they are hooked up and the ELI is brought on line.
6.2. INPUT POWER CONNECTIONS
It is highly recommended that a qualified electrician make all input power connections. T he input power
should be connected correctly at the required voltages and the ground cable should be of the same gauge
as the input power cables. In the 150KVA system i t is vital that a true ground be brought into the unit, not a
The first and last battery of each string are then connected to the isolation breakers in the right-
side battery cabinet door. See attached image-general breaker arrangement. The battery cabinet
shelf-to-circuit breaker jumpers are pre-wired into the cabinet. The installer measures the DC volt-
age across each circuit breaker to verify polarity and voltage after battery installation. If the polarity
and voltage are correct, then the terminal blocks above the breakers provide for wiring each string
back to the inverter cabinet.
The inverter cabinet parallels
the strings. The inverter cabi-
net has multiple battery string
terminal blocks. Refer to Sys-
tem Component Layout. The
number matches the number of
strings coming back from the
battery cabinets. For example,
if there are four strings over two
battery cabinets, then a total of
eight cables run back from the
battery cabinets to the inverter
cabinet. Each cabinet would
have four wires, two negative
and two positive coming from it.