100% Quality Assurance &
Testing Standards
At VARSHNEY ELECTRICAL INDUSTRIES, quality isn't just a sample check. 100% of finished wire coils and spools undergo rigorous water immersion testing, 10,000V in-line spark verification, and high megger inspection before dispatch.
Manufactured & Tested to IS 8783 : 1995 Standards
Our poly-wrapped submersible winding wires strictly adhere to the technical parameters and testing methodologies defined in Indian Standard IS 8783 (Parts 1 to 4). 100% of finished coils that leave our facility undergo 10,000V spark testing, water soak testing, and megger checks.
Pure Copper Conductor
- • Resistivity: 0.017241 Ω·mm²/m @ 20°C
- • Elongation: Min 24% to 40% before break
- • Density: 8.89 g/cm³ high conductivity CC copper
- • Tolerance: ±1% on nominal wire diameter
High Megger (> 10,000 MΩ)
- • Insulation Resistance: > 10,000 MΩ (100% Tested)
- • Volume Resistivity (27°C): ≥ 1 × 1016 Ω·cm
- • Volume Resistivity (90°C): ≥ 1 × 1013 Ω·cm
- • Tensile Strength: Min 50 N/mm² (≥ 125% Elongation)
3.0 kV Water Immersion Test
- • 100% Dispatch Check: Water soak high-voltage tested
- • Clause 4.5 Standard: 3.0 kV AC (50 Hz) withstand
- • Pre-Conditioning: Continuous water immersion soak
- • Dual Wrap: Polyester + BOPP Polypropylene
10 kV (10,000V) Spark Test
- • In-Line Spark Test: 100% length verified at 10,000V (10 kV)
- • Zero Pinholes: 100% continuous spark defect detection
- • Heat Shock (Part 14): 150°C for 1h (zero cracks)
- • Hot Deformation (Part 15): 115°C (depth ≤ 25%)
Summary of Standard Physical & Electrical Test Requirements
IS 8783 Pass Criteria| Test Description | Applicable Standard | Test Conditions | Specified Value / Requirement |
|---|---|---|---|
| Water Immersion High Voltage Test | IS 8783 (Part 4/Sec 3) Cl. 4.5 | 12 hours water immersion | Withstand 3.0 kV AC for 1 min (100% Spools Tested) |
| In-Line High-Frequency Spark Test | IS 8783 (Part 3) / IS 10810 (Part 44) | Continuous in-line extrusion check | 10,000V (10 kV) Spark Tested (Zero Pinholes) |
| Volume Resistivity @ 27°C (Megger) | IS 8783 (Part 2) / IS 10810 (Part 43) | Room temperature (27°C) | ≥ 1 × 1016 Ω·cm (> 10,000 MΩ High Megger) |
| Volume Resistivity @ 90°C | IS 8783 (Part 2) / IS 10810 (Part 43) | Elevated operating temp (90°C) | ≥ 1 × 1013 Ω·cm |
| Heat Shock Test | IS 8783 (Part 2) / IS 10810 (Part 14) | 150°C ± 2°C for 1 hour | No signs of cracks, scaling or layer separation |
| Hot Deformation Test | IS 8783 (Part 2) / IS 10810 (Part 15) | 115°C for 6 hours under load | Depth of indentation ≤ 25% |
| Water Absorption (Gravimetric) | IS 8783 (Part 2) / IS 10810 (Part 33) | 70°C for 24 hours | Water absorbed ≤ 2 mg/cm² |
Aditya Birla Hindalco
Tamra Bandhan 2024
Official Certificate of Appreciation presented to VARSHNEY ELECTRICALS INDUSTRIES by Aditya Birla Hindalco, recognizing our valued partnership and commitment to 100% pure Continuous Cast (CC) copper rods. Unlike ordinary hard or scrap-mixed copper, our copper is fully continuous-annealed for unmatched softness, >30% elongation, and maximum electrical conductivity.
