FAQ Equipotential bonding for tankers

Isn't the equipotential bonding in conflict with the insulation of the tanker according to ISGOTT?

The ISGOTT prescribes that the tanker must be insulated from the landside by insulating flanges and bumpers and does not recommend any unsupervised equipotential bonding, as it could be dangerous.

However, despite the insulation, there is still the risk that unintentional short-circuits between the ship and the shore side can occur (e.g. by using steel ropes or an uninsulated gangway), which may result in balancing currents of a few amperes due to the galvanic effect.

The SEK-3 system therefore only switches the equipotential bonding in a flameproof contactor through when an extremely low-resistance contact of the clamp on the ship has been detected. The monitored equipotential bonding therefore offers additional safety and is not in conflict with the ISGOTT.

Can I also use the cable with clamp from the SEK-2 for the SEK-3 system?

No, because the grounding clamp for the Marine Grounding System SEK-3 has an additional LED status indicator, the cable is assembled differently than the cable for the previous SEK-2 system. For each system, the associated cable with the particular ship grounding clamp must be used.

A special clamp holder (Art. No. SEK3ZBZH), which has a recess for the LED display, was designed to securely hang up the grounding clamp with LED indicators. We also recommend using the robust cable holder made of aluminium (Art. No. SEK2ZBKH) to hang up the ship grounding cable.

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