SMA MFR01-10, Installation Manual, Page: 24 / 32

4 Electrical Connection SMA Solar Technology AG
24 MFR-NR-IA-en-23 Installation Manual
4.6.2 Connecting to the Multifunction Relay
Requirement:
☐ The technical requirements of the multifunction relay must be met (see Section 6 "Technical
Data", page 27).
Cable requirements:
☐ The cable must be double-insulated.
☐ External diameter: 5 mm to 12 mm
☐ Conductor cross-section: 0.08 mm² to 2.5 mm²
☐ The cable type and cable-laying method must be appropriate for the installation and location.
Procedure:
1. When connecting to the utility grid, protect the multifunction relay with a separate circuit
breaker.
3. If the cable gland on the inverter is installed inside the inverter, insert the cable gland from the
outside:
• Unscrew the counter nut from the outside of the
inverter and remove the cable gland from
inside of the inverter.
Destruction of the multifunction relay as a result of excessive contact load
• Observe the maximum switching voltage and maximum switching current (see Section 6
"Technical Data", page 27).
• When connecting the multifunction relay to the utility grid, protect the multifunction relay with
a separate circuit breaker.
Displayed graphics
This section describes the connection to the multifunction relay, but only shows the
Sunny Tripower in the illustrations. However, the same method is used to connect to the
multifunction relay in all the inverters. Only the inverter environment is different.
2.
Danger to life due to high voltages in the inverter
• Disconnect the inverter from voltage sources (see inverter manual).