PE2-PA WINDING WIRE for Submersible Motors

View more products about submersible pump winding wire+

Dielectric Breakdown Voltage and Electrical Properties

The dielectric breakdown strength of PE2-PA winding wire represents its most critical performance parameter. Tested at 20°C and 50 Hz, the wire achieves a minimum dielectric breakdown strength of 70 kV/mm . This high value ensures reliable electrical isolation even under the demanding conditions of submerged operation.

The specific insulation resistance measures 10¹⁰ Ω·cm at 20°C when tested in accordance with the IEC 60093 standard . This high insulation resistance is essential for preventing current leakage in water-filled motor environments.

The dielectric constant of the insulation material, measured at 800 Hz, is 2.3 . This relatively low value indicates good insulating properties with minimal energy loss.

For voltage ratings, PE2-PA winding wire is available in configurations suitable for operating voltages of 1,000 V and 3,000 V . When a semiconducting layer is added (HL-PE2-PA construction), the voltage rating extends to 6,000 V, making it suitable for high-voltage submersible motors used in mining and seawater applications .

Mechanical and Thermal Performance

The mechanical properties of PE2-PA winding wire are specified in accordance with IEC 60811-1-1. At 23°C, the minimum tensile strength is 10 N/mm² and the minimum elongation at break is 100% . These properties ensure the wire can withstand the mechanical stresses of winding without cracking or breaking.

After aging at 80°C for seven days (7×24 hours), the wire maintains its mechanical integrity, with tensile strength remaining at or above 10 N/mm² and elongation at or above 100% . This aging performance demonstrates the long-term reliability of the insulation system.

The thermal rating of PE2-PA winding wire allows continuous operation at temperatures up to 90°C, depending on the specific application conditions and mechanical loading . The cross-linking of the polyethylene is the key mechanism that achieves this enhanced heat resistance compared to standard polyethylene insulation .

One notable characteristic of PE2-PA wire is its high resistance to voltage fluctuations, providing a greater safety factor than standard motor windings . This makes it particularly suitable for environments where voltage stability cannot be guaranteed.

Applications

PE2-PA winding wire is primarily used in water-filled submersible motors for pumping applications. The wire’s ability to operate reliably while submerged makes it the standard choice for deep well pumps, agricultural irrigation systems, municipal water supply, and industrial water management .

Submersible motors wound with PE2-PA wire demonstrate superior performance at water temperatures up to 50°C, with some manufacturer specifications allowing operation at even higher temperatures . The wire’s trouble-free operation and extended service life make it a cost-effective solution for applications where maintenance access is difficult or costly.

The wire is suitable for motors operating in diverse environments including freshwater wells, seawater applications, fountains, mining operations, and drinking water systems . Its chemical resistance and waterproof design ensure stable electrical performance even under prolonged submersion.

For high-voltage applications, the HL-PE2-PA construction with semiconducting layer extends the wire’s suitability to 6 kV motors, addressing the needs of specialized industrial and mining installations .

Technical Standards

The manufacturing and testing of PE2-PA winding wire is governed by several international and regional standards. The mechanical properties are tested in accordance with IEC 60811-1-1, which specifies test methods for insulating and sheathing materials of electric cables. This standard covers tensile strength and elongation testing procedures .

Dielectric breakdown strength is determined according to DIN VDE 0303-21, the German standard for testing electric strength of solid insulating materials at power frequencies . This standard is equivalent to IEC 60243-1.

Insulation resistance testing follows IEC 60093, which specifies methods for determining volume and surface resistance of solid electrical insulating materials .

For submersible motor winding wires specifically, the Chinese standard JB/T 4014.4 covers cross-linked polyethylene insulated nylon sheathed water-resistant winding wires with rated voltages up to 600/1000 V . This standard defines the technical requirements, test methods, and inspection rules for PE2-PA type wires used in water-filled submersible motors.