Pre-Configuration Planning
976-0043-01-02
2–15
inverters to meet NEC/CEC compliance. Two amperage ratings are
available: a DC250 (250 amps) and a DC175 (175 amps) in either single-
or double-pole configurations for single or dual inverter installations.
See
“DC Disconnect Boxes (DC175/DC250)” on page 2–24
for
additional information on the Xantrex DC175 and DC250.
After selecting battery cables based on the distance from the battery bank
to the inverter, add battery overcurrent protection in the battery cable line,
based on
Table 2-3
. This table will help you to determine your maximum
breaker/fuse size based on the cable size you selected previously.
Fuse Block (TFB)
Some installations may not require conduit(s) or a disconnect device,
however, overcurrent protection is still required. Xantrex offers a fuse
block (TFBxxx) providing the code-required inverter overcurrent
protection for these applications. These fuses are available in 110, 200,
300 and 400 amp sizes.
Battery Requirements for Dual Inverter Systems
The success of “stacked” or “dual” inverter systems is dependent on the
quality and maintenance of the DC connections. Stacked inverter sets are
far less forgiving to long, undersized, uneven, and/or poor connections
than are single inverters.
Dual inverters
(not stacked)
Dual inverter configurations can be used without using the stacking
interface cable. In this configuration, two inverters separately run isolated
loads from the same battery bank or individual battery banks.
Table 2-3
Battery Cable to Maximum Breaker/Fuse Size
Cable Size Required
Rating in
Conduit
Maximum
Breaker/Fuse
Size
Rating in
“Free Air”
a
a.
The term “free air” is defined by the NEC/CEC as cabling that is not
enclosed in a conduit or a raceway. Cables enclosed in conduit or
raceways have substantially lower continuous current carrying ability due
to heating factors.
Maximum
Breaker/Fuse
Size
#2/0 (00) AWG
175 Amps
175 Amps
265 Amps
300 Amps
b
b.
The NEC/CEC allows rounding to the next highest standard fuse size
from the cable rating (i.e., 150 amp cable size rounds up to a standard
175 amp size).
#4/0 (0000) AWG
250 Amps
250 Amps
360 Amps
400 Amps
b
Important:
From this point on in this guide, any reference made to a “DC
disconnect” means either a DC breaker or a fuse with a disconnect switch, which
will depend on your specific type of installation.
Содержание SW Plus 2524
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Страница 101: ...DC Wiring 976 0043 01 02 3 19 Figure 3 9 BTS RJ11 Port Location and Installation BTS RJ11 Port DC End of the Inverter...
Страница 105: ...DC Wiring 976 0043 01 02 3 23 Figure 3 13 DC Connections to a Single Inverter...
Страница 107: ...DC Wiring 976 0043 01 02 3 25 Figure 3 14 DC Connections to Dual Inverters...
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Страница 127: ...4 Functional Test Chapter 4 Functional Test explains how to conduct a functional test of the inverter...
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Страница 141: ...Menu Map 976 0043 01 02 5 9 Figure 5 10 User Menu Map Part 2...
Страница 143: ...Menu Map 976 0043 01 02 5 11 Figure 5 12 Basic Setup Menu Map Part 2...
Страница 145: ...Menu Map 976 0043 01 02 5 13 Figure 5 14 Advanced Setup Menu Map Part 2...
Страница 146: ...Navigation 5 14 976 0043 01 02 Figure 5 15 Complete User Menu Map...
Страница 147: ...Menu Map 976 0043 01 02 5 15 Figure 5 16 Complete Basic Setup Menu Map...
Страница 148: ...Navigation 5 16 976 0043 01 02 Figure 5 17 Complete Advanced Setup Menu Map...
Страница 200: ...Advanced Setup 7 22 976 0043 01 02 Figure 7 3 Relay 11 Wiring Example to Dual Inverters with Cooldown selected...
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Страница 342: ...Index IX 4 976 0043 01 02...
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