
6 Electrical Connection
SMA Solar Technology AG
Installation Manual
SBxx-1SP-US-40-IA-xx-15
40
Reporting the switching status of the grid relay
The multifunction relay can trip a signal to the grid operator as soon as the inverter connects to the
utility grid. To enable this function, the multifunction relays of all inverters must be connected in
parallel.
1 k
Ω
B
F
1
2
3
B
F
1
2
3
B
F
1
2
3
=
Signal to
grid operator
Inverter 1:
Grid relay closed
Inverter 2:
Grid relay open
Inverter n:
Grid relay open
max. 30 V
DC
Figure 11 : Wiring diagram for signaling the switching status of the grid relay (example)
6.4.4
Connection to the Multifunction Relay
Additionally required material (not included in the scope of delivery):
☐ Conduits: 21 mm (0.75 in) or smaller with a proper reducing bush
☐ Rain-tight conduit fittings for wet locations complying with UL 514B: 21 mm (0.75 in) or
smaller with a proper reducing bush
ENGLISH
Содержание SB3.0-1SP-US-40
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