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Protections

Chapter 3rd

Protection from Galvanic corrosion: • Marine galvanic isolator • Corrosion tester Protection from peak of voltage • AC Power Defender Aber Marine Protection from atmospheric discharge • Lightning rods

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Galvanic isolators GALVANIC ISOLATORS All DEI galvanic isolators are solid-state DC isolation The power of galvanic isolator must be higher than current of shore power connections No maintenance required and easily to be tested with digital multimeter They must be installed in series with the shore grounding conductors They protect the vessels from galvanic corrosions Rated for high levels of lightning current FSP= Fail safe Plus FSM= Fail safe max SECURITY: THE GALVANIC ISOLATOR protects the system and human beings From possible difference of high power between input and output circuit That causes damages or overvoltage on input circuits

Model GI-30A-FSP

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Max power A 30 A

AC fault rating KA 3kA x1 3cycles

Lightning rating kA 75kA peak

Operating temperature °C -45°C +65°C

Degree of protections IP IP 68

Code RE 70080

GI-50/60A-FSP

50 A

5kA x1 0cycles

100kA peak

-45°C +65°C

IP 68

RE 90115

GI-100A FSM

100 A

5kA x 198cycles

100kA peak

-45°C +65°C

NEMA 4X

RE 90116

GI-200A FSM

200 A

5kA x 198cycles

100kA peak

-45°C +65°C

NEMA 4X

RE 70083

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Corrosion test meter Galvanic corrosions: process that degrade electrochemically the metal This corrosion happens when two different metals come into contacts with An electrolyte ,such as salt water, creating a galvanic cellar. One cellar can be created even when the same metal is affected by two different concentrations of the electrolyte. The electrochemical potential creates an electric current (positive and negative ions) winch Dissolves the less noble material( typical problem of metal vessels)

RE 70086

RE 70085

CORROSION TEST METER An instruments allowing an easy control of the efficiency state of the catodic protection system Supplied with: One millivoltmeter with three graded scale Ag/Ag CI reference electrode One negative contacts. The graded scale read the state of protection and corrosions of the three metal commonly used on the hull: BRONZE, STEEL, ALUMINIUM

Model

Corrosion state mV

Protection state mV

Overvoltage mV

Code

BRONZE

STEEL

ALUMINIUM

BRONZE

STEEL

ALUMINIUM

BRONZE

STEEL

ALUMINIUM

ANALOG

0-500

0-750

0-950

500-700

750-950

950-1000

700-1200

950-1200

1000-1200

RE 70085

DIGITAL

0-50

0-750

0-950

500-700

750-950

950-1000

700-1200

950-1200

1000-1200

RE 70086

GROUND PLATES Produced by micro-spheres of pure bronze Ground plates for electric installation on board Provided with nuts, screws and spacers Description

Model 0

Dimensions mm 155 x 51x 13

Ground area equivalent 1 m2

Weight Kg 0,53

Ground plated Ground plated

RE 83047

1

205 x 64 x 13

1,8 m2

0,8

RE 83048

Ground plated

2

300 x 80 x 13

3 m2

1,65

RE 83049

Ground plated

Round shaped

Ă˜ 128

1,5 m2

0,60

RE 83050

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Code

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AC power defender

AC POWER DEFENDER Protection circuit for the electrical installation on board It has an electronic circuit for controlling the input voltage and a remote control switch at 63A. Case in fireproof polystyrene, IP66 grade It supplies 230V only if: Supply is between 180 an 260 VAC LED display placed in the front with two colours: GREEN LED: supply is OK and relay is closed RED LED: supply is KO i.e. less than 180 or more than 260 and relay is open And with one relay with a connection at 2A – 250Vac for a remote control on bridge AC POWER DEFENDER must be installed on inlet plug

Model

AC POWER DEFENDER

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Installation supply Vac

Output supply Vac

MAX Power A

Display

Dimensions

Weight

LED

mm

gr

230 Vac

180 : 260 Vac

63 A

LED VERDE/ROSSO

180 x 182 x 110mm

1700

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Code

RE 70070


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Protection from lightning

LIGHTNING Lightning conductor installation an vertical rod. It is installed to the more high extremity of the boats. It is related with the dissipator through descent conductors. The protect area: cone with the peak of lightning conductor rod half-open by 45°. Each descent conductor have been related with one or more dissipator connected by themselves Model

Single point

Number of point

Dimensions mm

Material

Code

Lightning conductor rod Lightning conductor rod

YES

NO

350 Ă˜ 12 mm

Brass

RE 70090

NO

4 points

-

-

RE 70091

Lightning conductor rod

NO

5 points

-

-

RE 70092

Lightning conductor rod

NO

7 points

-

-

RE 70093

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