Fuse Replacement; Connection Example - Bergey Powersync II Owner's Manual

Owner's Manual
connection must be bonded directly to the tower disconnect ground lug which in
turn is bonded to the tower's ground rod.
 The input and output circuits are isolated from the enclosure. System grounding
when required by the Canadian Electrical Code, Part I, is the responsibility of the
installer.

8. Fuse replacement

 Warning: For continued protection against risk of fire, replace only with same
type and ratings of fuse.
 Two output fuses are located in the dual fuse block on the lower left side of the
enclosure.
 Class T 80A, 300VAC
 Two pre-charge fuses are located on the Input/Output PCB board.
 Class CC Time Delay, 2.5A, 600VAC
 Three input fuses are located in a separate fuse box provided by the installer.
Fuse type may vary, but must be UL listed fuses rated, 400 VAC minimum, 50
Amp maximum

9. Connection example

Wiring methods in accordance Electrical Connections are made to the
with the National Electrical Code, unit via the 1.5" conduit holes in the
ANSI/NFPA 70 are to be used. bottom of the enclosure. Use at least
12" of flexible conduit below inverter for
input and output connections.
240 Vac Utility Connection
Gale 12KW
AMFA-27
Both input and output
disconnects must be opened
Reversing
before making connections
Meter
to the inverter.
Main Breaker
Panel
Grid Disconnect
Backfeed 60A
Breakers
Surge
Arrestor
Additional disconnect
The inverter's earth ground
switches may be needed if
connection must be
the inverter is not installed
bonded directly to the
conveniently close to the
service entrance's earth
main breaker panel.
ground which in turn is
bonded to neutral.
With the wind turbine tower sticking high into the air, lightning damage is a concern to
most inverter customers; especially those customers in areas with frequent cloud to
ground lighting. BWC's warranty does not cover lightning damage to the inverter. A
direct lightning strike can easily be in excess of 100kV at 100kA. Proper grounding of
the turbine to the tower and running the input wires down the tower in grounded metal
conduit will take care of most of this energy. The standard inverter is capable of
inverter
For inverter inputs use
Isolated 3-phase 600 Vac wire
6 – 2 AWG, 90 °C copper wire only
(4 AWG minimum recommended)
Input Disconnect Switch
With three UL listed
400V 50A fuses
Inverter outputs
Single-phase 208 Vac
6 – 1/0 AWG, 90 °C copper wire
or 4 – 1/0 AWG, 90 °C Aluminum wire
(4 AWG minimum recommended)
Surge arrestors are not required but are recommended. No lightning
protection system provides complete protection. Lightning damage is not
covered under your warranty. Contact your distributor or DTI for application
specific lightning surge suppression solutions.
BWC EXCEL 10 Turbine
240Vac Split-phase connection
Run the phase wires either inside the
tower tube or in grounded metal conduit.
This helps reduce induced current from
lightning.
Tower Disconnect Switch
The inverter's earth ground
connection must be
bonded directly to the
tower disconnect box
which in turn should be
connected to a ground rod
at the tower.
Use 3-phase 600 Vac wire sized for the turbine capacity
90 °C copper wire only
Run the phase wires underground between the tower and the
inverter. This will help reduce lightning surges.
Wind Turbine
Surge
Arrestor
Rev. 2.6
28 October 2011
Page 19