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Chint NL1-63 4P 63A 300mA RCCB – 4 Pole Residual Current Circuit Breaker, AC Type, 300mA Sensitivity, 6kA Withstand for Three-Phase Earth Leakage Protection
Chint NL1-63 4P 63A 300mA RCCB – 4 Pole Residual Current Circuit Breaker, AC Type, 300mA Sensitivity, 6kA Withstand for Three-Phase Earth Leakage Protection
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Product Code: NL1-63-4P-63A-300mA
Brand: Chint
Product Type: RCCB (Residual Current Circuit Breaker)
Pole Configuration: 4 Pole (4P) – L1, L2, L3, N
Rated Current: 63 Amperes (63A)
Residual Operating Current (Sensitivity): 300mA
Type: AC (detects sinusoidal AC leakage currents)
Short-Circuit Withstand Capacity (Im): 6kA (with backup MCB)
Mounting Type: DIN Rail
Standard Compliance: IEC/EN 61008-1
Product Overview
The Chint NL1-63 4P 63A 300mA RCCB is a four-pole residual current device designed for use in three-phase electrical installations. With a 63A current rating and 300mA sensitivity, it is ideal for providing earth fault protection for equipment and installations where fire risk protection is a priority rather than personal protection.
This RCCB disconnects all three phases and the neutral simultaneously in the event of a leakage current. The 300mA trip level makes it especially suited for fire protection, offering an added layer of safety in industrial, commercial, and distribution systems.
Key Features
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🔋 63A Current Rating – Suitable for medium-capacity three-phase loads
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⚠️ 300mA Sensitivity – Designed to prevent fire risks from high leakage currents
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🔌 4 Pole Protection (L1, L2, L3, N) – Full isolation of all phases and neutral
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🌐 AC Type RCCB – Detects sinusoidal AC leakage currents
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⚡ 6kA Withstand Rating – Withstands short-circuit energy with backup MCB
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🧲 DIN Rail Mounted – Easy to install in standard three-phase boards
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✅ Compliant with IEC/EN 61008-1 – Meets international safety and performance standards
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Chint |
| Series | NL1-63 |
| Rated Current (In) | 63A |
| Residual Operating Current (IΔn) | 300mA |
| RCCB Type | AC |
| Number of Poles | 4P (3 Phase + Neutral) |
| Voltage Rating | 400V AC |
| Frequency | 50/60 Hz |
| Short-Circuit Withstand (Im) | 6kA (with MCB) |
| Mounting Type | DIN Rail |
| Operating Temperature | -5°C to +40°C |
| Compliance Standard | IEC/EN 61008-1 |
Typical Applications
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Three-phase distribution panels
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Industrial and commercial circuits with higher fault current risk
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Fire prevention protection in large buildings
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Earth leakage protection for motors, HVAC systems, and equipment
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Main protection in commercial and light industrial installations
Why Choose Chint NL1-63 4P 63A 300mA RCCB?
The Chint NL1-63 4P RCCB (300mA) is purpose-built for fire protection and system-level earth fault monitoring in three-phase installations. It combines high capacity, robust protection, and certified reliability, making it the preferred solution for electricians and engineers managing medium to high-load systems.
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