Technical Specifications:

• Rated Power: 0.75 kW (1.0 HP)
• Rated Voltage: 230V AC, 50 Hz (single-phase) / 400V AC (three-phase optional)
• Rated Current: 5.8 A (at 230V)
• Rated Speed: 2850 RPM (2-pole)
• Insulation Class: F (155°C)
• Protection Class: IP68
• Cooling Method: Water-cooled (motor submerged in pumped water)
• Maximum Submersion Depth: 100 m
• Cable: H07RN-F, 3×1.5 mm² + PE, length 20 m (standard)
• Motor Diameter: 98 mm (fits 4-inch well)
• Weight: 18.5 kg (motor only)

Material Composition:

• Stator Housing: Stainless steel AISI 316L (superior corrosion resistance for potable water)
• Rotor Shaft: Stainless steel AISI 304
• Bearings: Upper – silicon carbide (SiC); Lower – rubber-lubricated
• Mechanical Seal: Double seal, carbon/ceramic/NBR
• Windings: Copper, Class F enamel, vacuum-pressure impregnated (VPI)

Structural Features:

• Narrow 98 mm outer diameter for 4-inch well compatibility
• Oil-filled compensation chamber with flexible rubber diaphragm
• Built-in thermal protector (PTC, 150°C trip point)
• Strain relief at cable entry point
• Check valve integrated at motor discharge end (non-return)

Working Principle:
Single-phase or three-phase AC energizes stator windings, creating a rotating magnetic field. The rotor follows at slight slip. The entire motor operates submerged; pumped water flows over the stator for cooling. The oil-filled chamber compensates for hydrostatic pressure changes as the pump raises or lowers in the well. The double mechanical seal prevents water from entering the motor cavity.

Key Advantages:

• 98 mm diameter fits standard 4-inch well casings
• Stainless steel 316L housing ensures potable water compliance (no corrosion, no contamination)
• 100 m maximum depth rating covers most residential well applications
• VPI windings provide superior moisture resistance and insulation integrity
• Integrated check valve prevents water column backflow on shutdown

Applicable Industries:

• Residential deep-well water supply
• Light commercial building water supply
• Agricultural well pumping
• Rainwater harvesting systems

Installation Requirements:

• Lower motor into well using a nylon lifting strap — never by cable
• Ensure minimum 1.0 m submersion below static water level
• Connect power cable to dedicated 10A MCB with 30 mA RCD protection
• Secure cable along riser pipe using cable clips every 2 m

Usage Precautions:

• Never operate dry — motor will overheat and burn out within 3–5 minutes
• Do not exceed rated depth of 100 m — mechanical seal pressure rating will be exceeded
• Test insulation resistance before first use: must be ≥5 MΩ at 500V DC
• Annual service: inspect mechanical seal, check cable insulation, verify thermal protector function