6 Electrical Connection
SMA Solar Technology AG
50
STP5-9TL-IA-en-10
Installation Manual
6.6.2 Connection to the Multi-Function Relay
Figure 16: Terminal block for connection to the multi-function relay
Requirements:
☐ The technical requirements of the multi-function relay must be met (see Section 13 "Technical
Data", page 90).
Cable requirements:
☐ The cable is double-insulated.
☐ External diameter: 5 mm … 12 mm
☐ Conductor cross-section: 0.08 mm² ... 2.5 mm²
☐ The cable type and cable-laying method must be appropriate to the application and location.
1. When connecting to the electricity grid, protect the multi-function relay with an individual
miniature circuit-breaker.
2. Disconnect the inverter from voltage sources (see Section 10).
Destruction of the multi-function relay as a result of excessive contact load
• Adhere to maximum switching voltage and maximum switching current (see Section 13.9
"Multi-Function Relay", page 102).
• When connecting the multi-function relay to the electricity grid, protect the multi-function relay
with an individual miniature circuit-breaker.