L&T RCCB-Residual Current Circuit Breaker

L&T RCCB – Residual Current Circuit Breaker (Earth Leakage Protection Device) The L&T RCCB (Residual Current Circuit Breaker) is a precision-engineered safety device from Larsen & Toubro, designed to protect lives and electrical systems from dangerous earth faults. It automatically disconnects the circuit when it detects leakage currents caused by insulation failures, faulty wiring, or accidental human contact. Built on the reliable Core Balance Current Transformer (CBCT) principle, the L&T RCCB ensures maximum safety and minimal downtime.

Key Features at a Glance

• ✅ Operates on advanced Core Balance Current Transformer (CBCT) principle

• ⚡ Instant tripping on detection of leakage or imbalance current

• 🔌 Available in 2-pole and 4-pole variants for single-phase and three-phase systems

• 🔒 Sensitivity levels: 30mA, 100mA, 300mA – ideal for varied protection requirements

• 💪 Current ratings: 25A, 40A, 63A, 100A [and more if specified]

• 🧰 DIN-rail mounting for easy installation and compact panel fitment

• 🧾 Test button for periodic functionality checks

• 🌐 Conforms to IS 12640 / IEC standards for global safety compliance

• 🔥 Prevents electric shocks and electrical fire hazards caused by earth leakage

• 🏗️ Durable construction ensuring long operational life

Why Choose This Product

The L&T RCCB provides superior electrical safety by detecting even small leakage currents and isolating faulty circuits instantly. Whether for residential, commercial, or industrial applications, it ensures user safety, equipment protection, and compliance with modern electrical standards. Its easy installation and reliability make it a preferred choice among electricians and project engineers across India.

Ideal For

• Residential apartments & housing complexes

• Commercial buildings & retail outlets

• Industrial automation panels

• Hospitals, schools, and offices

• Any electrical system requiring leakage protection

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Ohm Murugha Electrical — authorized dealer and supplier of L&T Electrical Products, delivering across India.
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FAQs

1. What is the main purpose of an L&T RCCB?
It protects people and electrical equipment by disconnecting power during earth leakage faults or insulation failures, preventing electric shock and fire.

2. How often should I test my RCCB?
It’s recommended to test the device monthly using the built-in Test Button to ensure it’s functioning properly.

3. Can an RCCB replace an MCB?
No, an RCCB is designed for earth leakage protection, while an MCB protects against overload and short circuit. Both can be used together for full protection.