Connecting the Inverter to the Utility Grid
Qualified person
Requirements:
The connection requirements of the grid operator must be met.
The grid voltage must be within the permissible range. The exact operating range of the inverter is specified in the operating parameters.
Procedure:
- Disconnect the circuit breaker and secure it against reconnection.
- Dismantle the AC cable by 50 mm.
- Shorten U, O and W by 8 mm each, so that the grounding conductor is 8 mm longer. This ensures that the grounding conductor is the last to be pulled from the screw terminal in the event of tensile strain.
- Strip off the conductor insulation of U, O and W by 15 mm.
- In the case of fine stranded wire, U, O and W are to be fitted with bootlace ferrules.
- Strip the grounding cable insulation.
- Insert the stripped part of the grounding cable into the ring terminal lug and crimp using a crimping tool.
- Insert the pan head screw (M5x12) incl. washer (M5) into the screw hole in the ring terminal lug and screw the ring terminal lug with screw firmly onto the connection point (PH2, torque: 2.5 Nm).
- Route the AC cable through the swivel nut, the seal insert, the threaded sleeve and the AC connector.
- Insert the AC conductors into the terminal according to the labeling and tighten them using the supplied Allen key (HX3, torque 1.5 Nm ± 0.3 Nm).
- Plug the threaded sleeve and the terminal together.
- The terminal must snap audibly into place.
- Fasten the swivel nut hand-tight.
- Ensure that all conductors are securely connected to the AC connector.
- Plug the AC connector into the jack for the AC connection. When doing so, align the AC connector so that the key on the inverter AC jack is inserted into the keyway on the AC connector bush insert.
