Wire Run And Wire Sizes; Powersync Ii Inverter - Bergey Powersync II Owner's Manual

Owner's Manual
fuses for the 240 VAC, 60Hz or 220VAC, 50Hz system is recommended. The fuses will
help protect the alternator in the event of a wiring, controller, or load short circuit. The
fused disconnect switch is normally installed at the base of the tower.
CAUTION
C.

WIRE RUN AND WIRE SIZES

Please refer to the BWC EXCEL Installation Manual for recommended wire and conduit
sizes for the tower-to-Powersync II wire run. Refer to the row labeled "BWC Excel-S"
for appropriate wire sizes.
D.

POWERSYNC II INVERTER

The Powersync II inverter should be installed indoors, near the main breaker enclosure
if possible. The Powersync II is designed to operate in a clean environment and should
never be installed outdoors as it is not weatherproof and will be damaged by rain. A
minimum of six inches of clearance is required on the top, bottom and sides of the
Powersync II to ensure adequate air flow through the enclosure.
The Powersync II should be connected to a dedicated 70A breaker installed in the main
breaker box. System grounding is accomplished by attaching a wire, # 8 AWG
minimum, from the grounding lug inside the Powersync II enclosure to the panel ground
inside the main breaker box. Additionally, the tower "bond" ground wire should be
connected to the grounding lug inside the Powersync II enclosure. A typical system
wiring schematic for the Bergey EXCEL 10 is shown below. The three AC connections
from the wind turbine can be connected to the Powersync II terminals in any order;
there is no required phase orientation.
DANGER
All wiring should conform to the National Electric Code or other governing local
electrical code. The use of electrical conduit for wiring between components is highly
recommended. All terminations should be coated with an anti-oxidation compound to
prevent corrosion.
Do not install a permanent "short circuiting switch" that
will provide dynamic braking of the alternator. These
switches can be easily misused, leading to serious
damage to the alternator. Such damage is not covered
by the BWC warranty.
Do not attempt to make the Powersync II connections
with energized leads. Always have the wind turbine fully
disconnected and the circuit breaker switched to "off"
before making the Powersync II connections.
BWC EXCEL 10 Turbine
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