Ac Line (Output) Connection; Turbine (Input) Connection; Earth Ground Connection; Fuse Replacement - Bergey POWERSYNC II Series Operator's Manual & Installation Instructions

4.5. AC Line (Output) Connection


The AC line output is single phase and not bonded to ground.

Connect the two single phase 240VAC or 208VAC wires from the distribution panel to the dual
fuse block located on the lower left side of the enclosure.

Tightening torque, allowable wire size, and type, for the Field-Wiring Terminals:
o
6 AWG to a maximum of 1/0 AWG for Copper Conductors Only
o
4 AWG to a maximum of 1/0 AWG for Aluminum Or Copper-Clad Aluminum Conductors
Only
o
Wire rated 75°C minimum
o
100 lbf-in tightening torque maximum

4.6. Turbine (Input) Connection


Connect the three phase turbine wires to the terminal block located on the lower right side of the
enclosure.

The inverter's wind turbine input must be connected to a 3-phase "delta" or "wye" connection with
the neutral not connected to earth ground (left floating).

The inverter must be provided with 3, UL listed fuses rated, 600 VAC minimum, 50 Amp
maximum for proper protection from the wind turbine input to the unit as well as an appropriate
UL listed fuse holder to accommodate the fuses.

Tightening torque, allowable wire size, and type, for the Field-Wiring Terminals:
o
50 lbf-in tightening torque
o
8 AWG - to a maximum of 2 AWG for Copper Conductors Only
o
Wire rated 75°C minimum

4.7. Earth Ground Connection


Earth ground is to be connected to the two terminals provided inside the enclosure
indicated by the earth ground equipment marking.
Allowable wire size range is 8 AWG – 4 AWG.
o
o
50 lbf-in tightening torque

The inverter's earth ground connections available on both the input and output terminals must be
bonded directly to the service entrance's earth ground which in turn is bonded to neutral. With a
second bond, the inverter's earth ground 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.

4.8. 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 (BUSSMANN JJN-80).

Two pre-charge fuses are located on the Rectifier PCB board. Class CC Time Delay, 2.5A,
250VAC (BUSSMANN BK/GMD-2.5-R).

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.
Operator's Manual & Installation Instructions
Page 6
1.405.364.4212 / www.bergey.com
PowerSync II
Rev: 1.1