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Legrand 4P 63A 30mA ELCB (DX3) – Residential

The Legrand DX3 63A 30mA ELCB is a 4-pole voltage-operated safety device designed for 415V residential networks. It serves as a primary safety component for the main incomer, focusing exclusively on earth leakage protection through its Type AC 30mA residual current detection.

Quick Answer

Yes, you should buy the Legrand DX3 4P 63A 30mA ELCB for its non-negotiable role in life safety. This device is specifically engineered for critical 30mA earth leakage protection on 415V residential main incomers across India, detecting dangerous currents before they cause harm. It's a focused safety device, not an all-in-one circuit breaker.

✓Instantaneous protection against fatal shocks — 30mA residual current sensitivity trips power in ≤300ms.
✓Rated for 63A continuous current — specifically designed for main incomer residential applications.
✓Robust surge handling during fault conditions — making and breaking capacity of 630A ensures safe disconnection.
✓Reliable 4-pole (4P) disconnection — provides simultaneous isolation for all phases in a 415V three-phase system.
✓Energy-efficient performance for households — minimizes heat generation with 1.5W power loss per pole.
✓Durable electrical switching lifespan — engineered for 4,000 electrical endurance cycles under load.

Ideal for Indian homeowners prioritizing dedicated 30mA earth leakage protection on their main incoming residential supply, especially in 415V systems. Avoid if you require a device that also includes overload or short-circuit protection within the same unit, as the DX3 focuses solely on life-saving earth fault detection.

Product Overview
The Legrand DX3 63A 30mA ELCB is a 4-pole voltage-operated safety device designed for 415V residential networks. It serves as a primary safety component for the main incomer, focusing exclusively on earth leakage protection through its Type AC 30mA residual current detection.

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Engineering Analysis
The 30mA sensitivity level is critical for life safety, as it detects leakage current below the threshold of human heart fibrillation. With a 10kA conditional short-circuit rating, this 4P device maintains system integrity in standard domestic distribution boards while occupying a compact 4-module (72mm) width.

Technical Support & FAQs