Skystream Owner’s Manual
3-CMLT-1054 Rev O XCO 1191
Pg. 16
Grounding
All electrical systems must be grounded in accordance with local and national standards. Grounding
provides protection from lightning, electrical shock, voltage surges and static charge build up.
The figures in
Appendix A
provide information for grounding the tower and Skystream at the service
panel. The tower must be grounded with a ground connection that is compliant with Section 250 of the
NEC, ANSI/NFPA 70.
Appendix B
provides information for grounding the tower according to the National Electric Code
(USA) and IEC 60364-5-54. Information about grounding electrodes, grounding conductors, and
connections is provided.
The turbine must be grounded to the tower as depicted in Figure 2
.
Note:
The AC input and AC output circuits are isolated from the enclosure and system grounding, if
required by Section 250 of the National Electrical Code, ANSI / NFPA 70, is the responsibility of
the installer.
The AC output / neutral is not bonded to ground inside of the wind turbine. Nacelle grounding is
provided through the ground slip ring.
The instructions in this section and Appendix A are provided as reference;
local electrical codes
and standards have precedence over these instructions.
Figure 2
Grounding for Yaw is provided by the jumper wire provided for attachment to the tower.
Utility Panel Connections
Skystream connects directly into your electrical panel. Wiring will vary with local zoning authority and
utility. Refer to
Appendix A
for drawings for each voltage, frequency and phase configuration. Some
installations will require a visible lockable disconnect switch located next to the electrical meter and/or
at the base of the tower. The disconnect switch is utilized by your local utility in the event of a power
outage to ensure no voltage is placed on the utility line during repair. Again, it is extremely important to
install in accordance with local and national zoning regulations.
WARNING :
To reduce the risk of fire, do not connect Skystream to an AC Load Center (circuit
breaker panel) on a branch circuit where multiwire branch circuits are connected.
CAUTION :
To reduce the risk of fire, connect only to a circuit provided with 20 amperes maximum
branch circuit overcurrent protection in accordance with the National Electrical Code,
ANSI/ NFPA 70.
CAUTION :
Overcurrent protection for the AC output circuit is to be provided by others. The
Maximum size output circuit protection acceptable for Skystream 3.7 is 20 A.