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Yqgn740 Series Low Voltage Mine Explosion Proof Submersible Motor. Triple Mechanical Seals & Advanced Cable Sealing: Effectively blocks water ingress, ensuring stable performance even in harsh underwater conditions. Waterproof Insulation Failures Addressed: Molded coils with thickened insulation eliminate water-related winding damage risks. Full-Condition Monitoring: Covers junction box leakage, motor internal water, winding overheating, oil chamber water, bearing overheating and insulation resistance.