Galvanic isolator

ما هذا

A galvanic isolator is a device in the AC shore earth conductor that blocks small DC voltages while still allowing fault current to trip protection, reducing galvanic currents between marina earth and underwater metals.

Anchor

Nordic winters mean months on shore power. FairHelm notes whether an isolator or isolation transformer is present, and whether the shore cable and inlet still look heat-damaged.

FairHelm judgment

FairHelm judgment: an isolator is strongly advisable for boats with underwater metals and long shore stays. It does not replace anodes or bonding. Isolation transformers are a heavier alternative on some installs.

Limits

We do not certify any brand here. Installation and testing belong to a marine electrician. Do not confuse an isolator with a simple earth lift that creates a shock hazard.

الأسئلة الشائعة

Q: Does an isolator replace sacrificial anodes?
A: No. It reduces one shore-power path. Anodes and bonding still matter.

Q: Is an isolation transformer the same thing?
A: No. A transformer isolates more completely and costs more space and money. Both aim at galvanic shore issues.

Q: Can I leave shore power connected all winter without one?
A: Many boats do, and many waste anodes faster. FairHelm treats missing isolation as a survey talking point.

بجانب

• Shore power
• Cathodic protection
• Bonding system
• Survey checklist
• Pre-purchase survey service