Dairyland
Galvanic Isolators
SKU: GI
Premium Fail-Safe Galvanic Isolation
Dairyland Galvanic Isolators are fail-safe, solid-state DC isolation/ AC coupling devices that will prevent galvanic corrosion from occurring on your vessel. Our proven devices feature ratings and characteristics that significantly surpass all marine industry requirements ensuring long-life and lasting performance. Proven fail-safe construction assures that the galvanic isolator never compromises the integrity of the grounding conductor, even in the unlikely case of the product failing.
Key Benefits
- Verified Fail-Safe Construction: Independently tested and certified to ABYC A-28, ensuring the safety grounding path is retained under all conditions.
- DC Isolation / AC Coupling: Blocks the flow of DC galvanic current while allowing AC current to pass, helping prevent galvanic corrosion of the boat and its drive system components.
- High AC Fault Current Ratings: Designed to exceed ABYC A-28 AC fault current requirements, with assured fail-safe operation.
- Lightning Surge Protection: Provides substantial lightning current ratings, a feature not required by ABYC A-28.
- Maintenance-Free Design: Fail-safe construction eliminates the need for a monitoring system under ABYC A-28 requirements.
Specifications
- Available Current Ratings: 30A, 50/60A, 100A and 200A shore services. Note: Dairyland discontinued the GI-30A model effective February 2026.
- DC Blocking Voltage: At least 1V, per ABYC A-28.
- System Voltage: Nameplated for use on systems of 600 VAC or less.
- DC Leakage Current: Less than 1 mA at the worst-case galvanic voltage difference anticipated across the device.
- Steady-State AC Current Ratings: GI-30A: 35A continuous; GI-50/60A: 50/60A; GI-100A: 100A; GI-200A: 200A.
- AC Fault Current Ratings (Amps AC-RMS Symmetrical): GI-30A-FSP: 3 kA for 13 cycles; GI-50/60A-FSP: 5 kA for 10 cycles; GI-100A-FSM: 5 kA for 198 cycles; GI-200A-FSM: 5 kA for 198 cycles.
- Lightning Surge Current Ratings: GI-30A-FSP: 75 A peak; GI-50/60A-FSP: 100 kA peak; GI-100A-FSM: 100 kA peak; GI-200A-FSM: 100 kA peak.
- Enclosure: GI-30A and GI-50/60A: molded, non-metallic enclosure rated IP68; GI-100A and GI-200A: molded, non-metallic fiberglass enclosure rated NEMA 4X.
- Temperature Range: -45°C to +65°C.
- Electrical Connection: Bidirectional and symmetrical design. Terminals are marked "Boat Ground" and "Shore Ground." 30A and 50/60A models use 5/16-inch diameter bolts; 100A and 200A models use 1/2-inch diameter bolts.
- Energy Requirements: None. The device is completely passive.
- Number of Operations: Virtually unlimited under rated lightning or AC fault current conditions, provided operations are not immediately repetitive.
- Certifications: Independently tested and certified to ABYC A-28 by Imanna Laboratory, Inc. All models are ignition protected and fail-safe.
Downloads
Shipping & Returns
Shipping costs and delivery timelines vary by order. All returns require prior written approval and may be subject to a restocking fee.
Please review our Terms & Conditions for complete shipping, return, and warranty details.
