75 kW Pump Motor — Israel (Aquaculture & Water Systems)

The Challenge: Bearing Corrosion & High Replacement Costs

The customer is a leading water pump manufacturer in Israel, serving aquaculture and industrial water systems worldwide. Motors suffered recurring bearing corrosion, premature failures, and higher maintenance frequency. Root-cause analysis pointed to shaft voltage and stray currents—common on VFD-driven pump trains. Imported grounding rings from established brands were considered, but unit cost blocked large-scale deployment across many systems.

Solution

Volsun recommended the VS-RDW 3rd generation shaft grounding ring, matched to motor specifications and duty. The design uses high-conductivity microfiber brush technology for continuous low-resistance shaft contact, supports a wide shaft compatibility range, targets low contact resistance for continuous operation, and is validated beyond the customer’s 1450 RPM requirement. Laser-engraved branding was also provided for OEM consistency.

Results

After rollout, recurring bearing-current-related corrosion patterns were reduced, service life improved, maintenance and replacement costs dropped versus the previously evaluated import option, and overall reliability improved—especially valuable where many pumps run unattended.

Highlights

• 75 kW, air-cooled low-voltage pump motor, 1450 RPM, humid continuous-duty environment
• VS-RDW 3rd generation shaft grounding ring
• Cost-performance suited to multi-unit deployment