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Blue Sea Systems

Blue Sea 3091 AC ELCI Circuit Breaker 16A 230V connections

Review the Blue Sea 3091 AC ELCI Circuit Breaker 16A 230V catalog ratings, AC connection points and installation notes, then add the part to your Crimp diagram.

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Connection overview

ELCI 16A 230V · 3091 connections.

See how this component fits into a system. Use the manufacturer’s installation instructions for the complete connections.

Blue Sea 3091 AC ELCI Circuit Breaker 16A 230V connection overview with 3 components: ELCI 16A 230V · 3091, Protected shore supply, 230 V vessel circuits. 5 cable connections. Crossings are not junctions.Protected shore supply L to ELCI 16A 230V · 3091 LINE L. Protected shore supply N to ELCI 16A 230V · 3091 LINE N. ELCI 16A 230V · 3091 LOAD L to 230 V vessel circuits L. ELCI 16A 230V · 3091 LOAD N to 230 V vessel circuits N. Protected shore supply PE to 230 V vessel circuits PE: Continuous protective earthProtected shore supply L to ELCI 16A 230V · 3091 LINE LProtected shore supply N to ELCI 16A 230V · 3091 LINE NELCI 16A 230V · 3091 LOAD L to 230 V vessel circuits LELCI 16A 230V · 3091 LOAD N to 230 V vessel circuits NProtected shore supply PE to 230 V vessel circuits PE: Continuous protective earthBlue Sea 3091 AC ELCI Circuit Breaker 16A 230V. AC breaker contact overview: line and neutral pass through separate poles, while protective earth bypasses the breaker. Supply protection is assumed; select all required main, branch and leakage protection separately. Crimp does not simulate automatic trips or verify AC protection coordination. Connection overview only. Cable lengths are placeholders; use the complete manufacturer diagram to select conductors and protection. No automatic fuse or cable-size recommendation is supplied by this example.ELCI 16A 230V · 3091LINE LLINE LLINE NLOAD LLOAD LLOAD NProtected shore supply. Connection overview only. Cable lengths are placeholders; use the complete manufacturer diagram to select conductors and protection. No automatic fuse or cable-size recommendation is supplied by this example.Protected shore supplyLLNPEPE230 V vessel circuits. Connection overview only. Cable lengths are placeholders; use the complete manufacturer diagram to select conductors and protection. No automatic fuse or cable-size recommendation is supplied by this example.230 V vessel circuitsLLNPEPE
Blue Sea 3091 AC ELCI Circuit Breaker 16A 230V connection overview with 3 components: ELCI 16A 230V · 3091, Protected shore supply, 230 V vessel circuits. 5 cable connections. Crossings are not junctions.AC breaker contact overview: line and neutral pass through separate poles, while protective earth bypasses the breaker. Supply protection is assumed; select all required main, branch and leakage protection separately. Crimp does not simulate automatic trips or verify AC protection coordination. Connection overview only. Cable lengths are placeholders; use the complete manufacturer diagram to select conductors and protection. No automatic fuse or cable-size recommendation is supplied by this example.
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Installation notes

Before you install.

Open a question for model-specific guidance and sources.

Verified against the manufacturer's documentation (rev. Manufacturer product specifications), checked 2026-10-19. Manufacturer documentation →

Which breaker is this?

Blue Sea 3091: 230 V AC, 16 A two-pole ELCI with 30 mA leakage trip and overcurrent protection. This is the standalone breaker, not a complete shore-power panel.

How are the conductors connected?

The symbol keeps LINE L and LOAD L on one pole, and LINE N and LOAD N on the other. Both open together. Protective earth bypasses the breaker continuously; it has no PE terminal. The example assumes a protected supply and does not specify a complete main, branch or leakage-protection installation.

What does Crimp simulate?

Select On, Off or Tripped to change the contacts manually. Crimp does not calculate AC fault currents, automatic trip times, leakage detection or protection coordination. The connection overview has no calculated cable or fuse recommendation. Check the complete installation against the manufacturer's instructions.

Technical reference

Specifications and terminal map.

Check the model, ratings and connection points against your own unit before choosing installation hardware.

Catalog specification

230 V AC 16 A double-pole ELCI main circuit breaker with 30 mA leakage trip and 5000 A interrupt capacity. These AC breakers combine residual-current and overcurrent protection (RCBO). Line and neutral remain separate; protective earth bypasses the breaker. Crimp models manual contact states only: automatic leakage/overload trips, test operation and AC protection coordination are not simulated.

The map identifies line, neutral and protective-earth connections. This page does not calculate an AC cable size or protection rating.

Terminal map

Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.

LINE L

neutral · input

16 A

LINE N

neutral · input

16 A

LOAD L

neutral · output

16 A

LOAD N

neutral · output

16 A
Sources and connection guidance

Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.

AC planning boundary. The drawing identifies conductors and connection points; supported switching states show contact continuity only. Crimp does not calculate AC load flow or verify fault protection, leakage trips, source isolation or grounding. This overview does not calculate cable sizes or validate protective devices. Follow the complete manufacturer installation instructions.

Read about the DC sizing method and its limits

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