SE2400081 Earthing brush

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Key features

• Brushes for propeller shaft system - 80% silver and 20% graphite.

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The brushholder for the earthing brushes must be mounted on a Ø20mm rod which is welded or bolted to the ship’s structure. This rod, as well as the 25mm2 earthing cable, should be supplied by the shipyard. The brushholder has two adjustable spring tensioners that are pre-set to a minimum pressure of approx. 790 grams on each brush. 

Please refer to the following instructions for mounting of the earthing brushholder and brushes: 

1. Shift the brushholder over the Ø20mm rod. 
2. Align the brushholder in such a way that both brushes may run over the center of the silver inlay on the copper slipring. 
3. Tighten the small bolt on top of the brushholder so the brushholder cannot move
4. Position both arms of the brushholder so they follow the radius of the slipring. 
5. Tighten the two bolts on front of the brushholder in order to fix the arms in the desired position. 
6. Open the clamps with the spring tensioners, put the earthing brushes in the brushholder, and close the clamps again. 
7. Connect the cable lugs of both earthing brushes to the small bolts on both sides of the brushholder. 
8. Connect one end of a short 25mm2 bonding cable to the large bolt on top of the brushholder. 
9. Connect the other end of the short 25mm2 bonding cable to the ship hull.

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