Manual LAE 241: Bow/stern changeover for two shore power connections
The LAE 241 automatically switches between two shore power supplies at the bow and stern (max. 16 A) and keeps the unused connector de-energised. This page summarises the notes, wiring diagram and safety information from the manual.
Manual edition: no version or date stated in the document, bilingual German and English. · Complete manual as PDF (German/English) · Go to the LAE 241 product
Contents
Use
If shore power connectors are fitted at both the bow and stern of a yacht, a 2-pole changeover switch must isolate the two supplies. Without one, the unplugged pin contacts are live at mains voltage, which is life-threatening. The LAE 241 switches automatically between the two supplies, maximum 16 A. It must not be used as a shore/generator changeover switch.
Important installation notes
- On the onboard system side, an RCBo (RCD/MCB) circuit breaker must be installed to protect the onboard system.
- Make all connections carefully and use ferrules.
- The connection may only be made by qualified electricians.
- Modifications to the device void the CE marking.
Wiring diagram
The diagram shows the terminals stern (1, 3) and bow (R2, R4) on the input side and OUT with PE to the onboard system, plus relay RE1 with connections A1 and A2. On the board, the connections onboard system OUT, bow and stern are each labelled L, N and PE.
More on this topic: Shore power on board · Onboard electrical planning. For questions about installation or for a repair: Contact · Warranty and repair · All manuals
Frequently asked questions
Why do I need the LAE 241?
If shore power connectors are fitted at both the bow and stern of a yacht, a 2-pole changeover switch must isolate the two supplies. Without one, the unplugged pin contacts are live at mains voltage, which is life-threatening. The LAE 241 switches automatically between the two supplies, maximum 16 A. It must not be used as a shore/generator changeover switch.
Can I use the LAE 241 as a shore/generator changeover switch?
No. According to the manual, the LAE 241 must not be used as a shore/generator changeover switch. It is intended exclusively for automatic switching between two shore power supplies at the bow and stern, with a maximum of 16 A. The manual names no other uses, and use as a generator changeover switch is excluded.
What protection does the LAE 241 need on the onboard system side?
An RCBo (RCD/MCB) circuit breaker must be installed on the onboard system side to protect the onboard electrical system. All connections to the shore power unit must be made carefully, using ferrules. The connection may only be made by qualified electricians. Modifications to the device void the CE marking.
How is the LAE 241 connected?
The diagram shows the terminals stern (1, 3) and bow (R2, R4) on the input side and OUT with PE to the onboard system, plus relay RE1 with connections A1 and A2. On the board, the connections onboard system OUT, bow and stern are each labelled L, N and PE. Use ferrules.
