Ac Grid Connection - SMA SUNNY TRIPOWER 60 Instructions D'installation

SMA Solar Technology AG / SMA Solar Technology America LLC

2.6 AC Grid Connection

These instructions for AC grid connection are for qualified
personnel only. To reduce the risk of electric shock, do not
perform any maintenance work other than that specified
in the user manual unless you are qualified to do so.
For fuse and RCD information, refer to Section 5,
page 36. AC fuse rating must not exceed the ampacity of
the conductors used.
INFORMATION
All electrical installations in the U.S. and Canada
must be made in accordance with the local standards
and National Electrical Code
the Canadian Electrical Code
• Before connecting the inverter to the utility grid,
contact your local grid operator. The electrical
connection of the inverter must be carried out by
qualified persons only.
• Ensure that no cables used for electrical
connection are damaged.
IMI Detection
The inverter has built-in IMI/RCMU (Insulation Monitoring
Interrupter / Residual Current Monitoring Unit) according to
the UL 1741 for non-isolated EPS interactive PV inverters.
It acts on continuous ground fault current and a sudden
change in the ground fault current. This functionality is
activated during normal operation.
Insulation Resistance Detection
The inverter has a built-in insulation resistance detection /
ISO circuit, which is certified according to the UL 1741 for
non-isolated EPS interactive PV inverters. The insulation
resistance detector performs a measurement of the
connected PV system resistance to ground before the
inverter connects to the grid. If the resistance is below the
grid code set value, the inverter will wait and re-measure the
resistance after a short while. When the resistance is above
the grid code set value, the inverter performs a self-test and
connects to the grid.
Installation Guide
®
ANSI/NFPA70 or
®
CSA C22.1.
Figure 2.16 Installation area
Figure 2.17 AC cable wire strip
INFORMATION
For AC connection, cables with multi-strand,
fine-strand or extra fine-strand conductors can be
used (see figure 2.18).
When using fine-strand or extra fine-strand
conductors, bootlace ferrules must be used for the
connection.
Figure 2.18 Cables with different conductors (from top to bottom):
multi-strand, fine-strand and extra fine-strand
2 Installation
STP60-10-IA-xx-11 25