Installation Guide

Table Of Contents

6 Electrical Connection

SMA Solar Technology AG

Installation ManualSBxx-1SP-US-41-IA-xx-1032

Load-break switch an cable protection:

☐ In PV systems with multiple inverters, protect each inverter with its own overcurrent protective

device. Observe the maximum permissible fuse protection (see Section10 "Technical Data",

page65). This will prevent residual voltage from being present at the corresponding

conductor after disconnection.

☐ The load-break switch or circuit breaker must be listed (see National Electrical Code

ANSI/

NFPA 70) or Canadian Electrical Code

CSA C22.1).

☐ Loads installed between the inverter and the overcurrent protective device must be fused

separately.

☐ The overcurrent protective device for the AC output circuit is to be provided by others.

Compatible grid configurations:

The connection procedure will vary, depending on the grid configuration; the country data set may

have to be set. The following table provides an overview of the compatible grid configurations,

which conductors have to be connected to the inverter to comply with the grid configuration and

which country data set can be set. As standard, the inverter is meant for connection to a utility grid

with a 208V wye connection or a 240V split-phase system, and the country data set

UL1741/2016/120 L-N-L is factory-set.

Compatible grid configura-

tion

Conductors to be

connected

Configurable country data sets

240V split-phase system L1, L2 and N • UL1741/2016/120L-N-L

• HECO_OHMRule 14HSDR

1.1/120L-N-L

• CA Rule 21/ 120L-N-L

• NE-ISO / 120 L-N-L

208 V wye connection L1, L2 and N

208Vdelta connection L1 and L2 • UL1741/2016/208L-L

• HECO_OHMRule14HSDR

1.1/208 L-L

• CARule 21/ 208L-L

• NE-ISO / 208L-L

240 V delta connection L1 and L2 • UL1741/2016/240L-L

• HECO_OHMRule14HSDR

1.1/208L-L

• CA Rule21 / 240L-L

• NE-ISO / 240L-L

ENGLISH