Overview

• The Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) is a critical safety device meticulously engineered to provide paramount protection against hazardous electrical shocks and fire risks within three-phase electrical installations.
• As a flagship offering from Schneider Electric's highly reliable Easy9 range, this 4-pole Residual Current Circuit Breaker (RCCB) is specifically designed to rapidly detect and interrupt minute leakage currents that conventional overcurrent protective devices like miniature circuit breakers (MCBs) or fuses cannot.
• With a robust rated current of 63 Amperes and an exceptionally sensitive earth-leakage tripping threshold of 30 milliamperes (mA), this AC type RCCB delivers instantaneous protection at 400 V AC 50 Hz, ensuring immediate disconnection in the event of a fault.
• The EZ9R03463 model is a voltage-dependent device, offering dependable performance and conforming to stringent international and national safety standards, including SANS 767 and IEC 61008-1.
• This makes it an indispensable component for a diverse array of commercial, industrial, and large residential applications where sensitive earth-leakage protection for three-phase systems is an absolute necessity.

Features

• Four-Pole Configuration (4P): Designed for comprehensive protection in three-phase systems, enabling simultaneous disconnection of all three phases and the neutral conductor (if present), ensuring complete isolation.
• 63A Rated Current (In): Capable of continuously carrying currents up to 63 Amperes, suitable for main incoming protection or sub-distribution circuits with substantial three-phase loads.
• 30mA Earth-Leakage Sensitivity: Provides highly sensitive protection against both direct contact (human protection) and indirect contact (equipment fault to ground), effectively mitigating the risk of severe electrical shock.
• AC Type Earth-Leakage Protection: Specifically designed to detect sinusoidal alternating earth leakage currents, which are the most common type encountered in standard AC electrical systems.
• Instantaneous Earth-Leakage Protection Time Delay: Guarantees immediate tripping (no intentional delay) upon detection of an earth leakage fault, minimizing the duration of exposure to hazardous conditions and maximizing safety.
• Voltage Dependent Residual Current Tripping Technology: Relies on the presence of line voltage for its operation, ensuring the protective function is active only when the circuit is energized.
• 500A Rated Breaking and Making Capacity: Possesses the ability to safely interrupt and make circuits with currents up to 500 Amperes, demonstrating robust performance even under significant fault conditions.
• 3000A (3kA) Rated Conditional Short-Circuit Current: Can safely withstand and coordinate with an upstream Easy9 MCB with a 3 kA breaking capacity at 63A, ensuring integrated and effective fault protection within the Easy9 ecosystem.
• DIN Rail Mountable (Clip-on): Engineered for quick, tool-free installation onto standard 35mm DIN rails, facilitating straightforward assembly and integration into electrical panels.
• Contact Position Indicator: Features a clear visual toggle indicator (ON/OFF) that provides an unambiguous status of the device's contacts, enhancing operational safety and aiding in troubleshooting.
• Integrated Test Button: Includes a front-face test button that allows for periodic functional verification of the RCCB's tripping mechanism, ensuring its continuous operational integrity.
• High Durability: Boasts substantial mechanical durability of 5,000 cycles and electrical durability of 2,000 cycles (at 400V AC 50Hz), promising an extended service life and consistent performance.
• Versatile Terminal Connections: Equipped with tunnel type terminals compatible with rigid conductors up to 35 mm² and flexible conductors up to 25 mm² at both top and bottom, offering wiring flexibility.
• Optimized Tightening Torque: Features a recommended tightening torque of 3.5 N.m for terminals, ensuring secure, low-resistance electrical connections.
• Compact Design: With dimensions of 82mm (Height) x 72mm (Width) x 72mm (Depth) and 8 x 9mm pitches, its compact footprint optimizes space utilization within electrical distribution boards.
• Environmental Compliance: Certified with IP20 degree of protection, compliant with RoHS 2003, and adheres to REACH regulations, underscoring Schneider Electric's commitment to environmental responsibility.

Benefits

• Comprehensive Three-Phase Safety: The 4-pole configuration of the Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) provides complete earth leakage protection for all phases and neutral in three-phase systems, significantly reducing the risk of electric shock and electrical fires across industrial, commercial, and large residential installations.
• Critical Human Protection: With a 30mA sensitivity, this RCCB offers high-level protection against direct contact with live parts and indirect contact (faults to exposed conductive parts), ensuring immediate disconnection and minimizing harm to personnel.
• Prevents Fire Hazards: By detecting and swiftly interrupting even minuscule leakage currents that could otherwise lead to overheating and insulation breakdown, the Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) plays a vital role in preventing electrical fires, safeguarding valuable assets and infrastructure.
• Instantaneous Response for Maximum Safety: The instantaneous tripping mechanism ensures immediate power cut-off upon fault detection, significantly reducing exposure time to dangerous currents and providing a superior level of safety.
• Ensured Operational Readiness: The integrated test button allows for straightforward, routine functional checks, giving users confidence in the device's continuous ability to protect and simplifying adherence to safety testing protocols.
• Streamlined Installation and Maintenance: Featuring clip-on DIN rail mounting and versatile tunnel terminals with precise tightening torque specifications, installation is quick, robust, and reliable, reducing labor costs and ensuring robust long-term connections.
• Long-Term Durability and Reliability: Built with high mechanical and electrical endurance ratings, the Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) is designed for a long service life, ensuring consistent, dependable performance and minimizing the need for premature replacements.
• Optimized Panel Space: Its compact modular design for a 4-pole device allows for efficient use of space within electrical distribution boards, which is particularly valuable in space-constrained environments.
• Regulatory Compliance and Peace of Mind: Adherence to stringent national and international safety standards (SANS 767, IEC 61008-1) provides assurance that your electrical system meets critical regulatory requirements, fostering peace of mind for operators and building owners.

In-Depth Technical Specifications

The Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) is a highly specialized Residual Current Circuit Breaker designed for critical safety applications in three-phase AC networks.

Ideal Use

The Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) is purpose-built for critical safety applications in three-phase electrical systems where the protection of human life and the prevention of fire are paramount due to earth leakage currents.

• Commercial and Industrial Facilities: Essential for main incoming protection or sub-distribution circuits in factories, workshops, large office buildings, retail centers, and other commercial/industrial environments utilizing three-phase power.
• Large Residential Properties: Ideal for larger homes, multi-dwelling units, or complexes that have three-phase power supply for heavy loads, ensuring comprehensive safety across the entire electrical network.
• Circuits Supplying Sensitive Equipment: Crucial for protecting circuits connected to machinery, motors, HVAC systems, and other three-phase equipment where insulation faults could lead to dangerous leakage currents.
• High-Risk Environments: Highly recommended for installation in areas with increased risk of electrical shock or fire, such as those with high humidity, conductive dust, or where personnel frequently interact with electrical equipment.
• Distribution Boards (DBs) and Main Panels: Serves as a primary or secondary protective device within main electrical distribution boards or sub-boards, providing a critical layer of safety.
• Renovation and System Upgrades: A vital component for modernizing existing three-phase electrical systems to comply with current safety standards and enhance overall protection.

Tips

• Mandatory Upstream Overcurrent Protection: It is absolutely critical to understand that the Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) is an earth leakage protection device only and does not provide overcurrent (overload or short-circuit) protection. A suitably rated Miniature Circuit Breaker (MCB) or fuse must be installed upstream to protect the RCCB itself and the entire circuit from overloads and short circuits. The datasheet explicitly indicates a "Rated conditional short-circuit current" with an Easy9 MCB of 3000 A (3 kA) at 63A, highlighting this necessary coordination.
• Regular Functional Testing: Always perform the integrated test button operation periodically, as recommended by relevant safety standards (e.g., monthly). This is crucial to verify the mechanical and electrical integrity of the RCCB's tripping mechanism.
  • Testing Procedure: Ensure the RCCB is in the ON position and the circuit is energized. Press the 'T' (Test) button located on the front of the device. The RCCB should trip immediately (move to the OFF position). If it fails to trip, this indicates either a lack of supply to the RCCB or a faulty device, which requires immediate inspection and potential replacement by a qualified electrician.
  • Safety Caution: The test button is solely for functional verification; never use it to switch off the RCCB for isolation purposes or to disconnect the circuit for maintenance.
• Professional Installation is Paramount: All electrical installation, wiring, and commissioning involving the Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) must be executed by a qualified and licensed electrician. Strict adherence to all local electrical codes, national wiring regulations, and safety guidelines is non-negotiable to ensure the safe, compliant, and proper operation of your electrical system.
• Correct Wiring and Torquing: Ensure all three phases and the neutral conductor are correctly connected to the device, as specified in the installation instructions. Pay meticulous attention to the wire stripping length (16mm) and the recommended tightening torque (3.5 N.m) for the terminals. Use a calibrated torque screwdriver to achieve the correct torque, preventing loose connections, increased resistance, overheating, and potential fire hazards.
• Adequate Environmental Enclosure: The Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) has an IP20 degree of protection, meaning it is protected against solid objects larger than 12.5 mm but offers no protection against water. It must be installed inside a suitable electrical enclosure (e.g., a distribution board with an IP4X or higher rating) to protect it from moisture, excessive dust, and other environmental contaminants relevant to its installed location.
• System Coordination: For complex industrial or commercial electrical systems, conducting a proper coordination study is highly advisable. This ensures that the Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) operates in harmony with other upstream and downstream protective devices, facilitating selective tripping that isolates only the faulted circuit and minimizes disruption to unaffected loads.
• Optimal Storage Conditions: Before installation, store the RCCBs in a dry, clean environment that adheres to the specified ambient temperature range (-40°C to 85°C). Avoid prolonged exposure to extreme humidity, corrosive atmospheres, or direct sunlight to preserve the product's integrity and long-term performance.
• Responsible Disposal: At the end of its operational life, the Schneider Earth Leakage EZ9 4P 63A 30mA (EZ9R03463) must be disposed of responsibly in accordance with Waste Electrical and Electronic Equipment (WEEE) directives and all local environmental regulations. Do not discard it with general waste; instead, utilize designated electronic waste recycling and disposal channels.