Active Shaft Grounding System


As a vessel travels at sea, it generates an electromotive force due to the use of materials with different electrochemical properties (such as zinc, bronze and steel), creating an electric current that flows through the bearings between the propeller, shaft and hull.

Over time, this electric current damages ships’ and submarines’ bearings. The active shaft grounding system protects these bearings by reducing corrosion.

It reduces the voltage difference between the shaft and the hull to the minimum possible level (a few mV) to minimise the flow of current through the bearings and to regulate the current regardless of the circuit’s instantaneous impedance.

By effectively regulating and reducing electrical currents, HENSOLDT’s grounding systems also significantly improve ships’ electromagnetic discretion.

Our active grounding systems deliver far superior performance compared to a simple passive grounding system, and are the perfect solutions for protecting the propulsion system and contributing to ship degaussing.

They can be adapted to all types of ships and submarines, can be installed on new vessels, and can also be retrofitted or used to replace entire existing systems (passive or active).


  • Reliable, rugged, durable system
  • Available currents: 30, 35 & 60A
  • Control and monitor system status from a local HMI or remotely via an Ethernet connection
  • IP55
  • Natural convection cooling
  • Single-phase 230V AC power supply

Main Benefits

  • COTS product
  • Adaptable: form factor, input network
  • Two operating modes: passive and active (for more efficiency)
  • Automatically switches to passive mode in the event of power failure
  • Suitable for harsh environments thanks to the high IP65 rating

Product Impressions

Product Impressions



Philippe LUCAS

+33 (0)1 72 86 62 22



  • System use
  • System maintenance

These training programmes can be delivered on board (using the customer’s equipment) or in classrooms using dedicated HENSOLDT equipment.