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Legrand 4P 63A 300mA ELCB (DX3) – Residential

The Legrand DX3 ELCB 4P 63A 300mA is a voltage-operated safety device designed for residential main incomer applications. It provides critical earth leakage protection by monitoring current imbalances across four poles at a 50 Hz frequency to prevent thermal damage.

Quick Answer

Yes, the Legrand DX3 4P 63A 300mA ELCB is an excellent investment for residential main incomer protection. Its 300mA sensitivity is precisely calibrated for fire prevention, protecting your entire household from significant thermal damage due to earth faults. Choose this model for reliable, comprehensive safety in your Indian home.

✓Reduces fire risk in domestic wiring — 300mA sensitivity detects leakage before heat builds up
✓10kA conditional short circuit rating provides robust protection during high-current fault events
✓Saves critical space in residential panels — compact 72mm width occupies only 4 modules
✓300ms maximum tripping time at 1x Idn ensures rapid circuit disconnection for user safety
✓Ensures structural integrity during thermal stress — housing passes the 850°C glow wire test
✓10,000 mechanical endurance cycles offer long-term operational life for main incomer switching

Homeowners prioritizing comprehensive fire protection and seeking robust main incomer safety in India should definitely consider the Legrand DX3 4P 63A 300mA ELCB. Those requiring only shock protection, or a lower amperage for individual circuits, may find alternative devices more suitable.

Product Overview
The Legrand DX3 ELCB 4P 63A 300mA is a voltage-operated safety device designed for residential main incomer applications. It provides critical earth leakage protection by monitoring current imbalances across four poles at a 50 Hz frequency to prevent thermal damage.

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Engineering Analysis
The 300mA sensitivity is specifically calibrated for fire protection in domestic environments, ensuring the 63A rated current does not cause persistent arcing. Its 4P configuration allows for complete isolation of all live and neutral lines, while the 10kA conditional short circuit rating ensures the unit remains intact during high-energy faults.

Technical Support & FAQs