Mitsubishi NF125-HGW-RE Instruction Manual

Mitsubishi NF125-HGW-RE Breaker manual cover

Pages 2

Year 2015

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Mitsubishi NF125-HGW-RE Breaker Specification

The Mitsubishi NF125-HGW-RE is a molded case circuit breaker designed for reliable protection and efficient operation in electrical distribution systems. This model is engineered to handle medium voltage applications, making it suitable for various industrial and commercial settings. It features a compact design, facilitating easy integration into existing electrical panels and systems. The breaker operates with a rated current of 125 Amperes and is capable of interrupting short-circuit currents effectively, ensuring safety and protection for connected circuits.

The NF125-HGW-RE includes thermal-magnetic trip units, providing dual protection through both thermal overload and magnetic short-circuit mechanisms. This ensures enhanced responsiveness to varying electrical faults, minimizing potential damage to electrical infrastructure. With a rated voltage of up to 690V AC, the breaker is versatile for a wide range of applications. It is designed to comply with international standards, ensuring compatibility and safety across diverse geographical regions.

Installation and maintenance are simplified by its user-friendly construction, allowing for straightforward mounting and secure connection. The breaker also features a manual toggle for easy operation, enabling quick disconnection during maintenance or emergency situations. The robust construction of the NF125-HGW-RE ensures durability and a long operational lifespan, with materials selected to withstand demanding environments.

Overall, the Mitsubishi NF125-HGW-RE breaker combines advanced protection features with a practical design, making it an ideal choice for safeguarding electrical systems against overloads and short circuits while offering ease of use and reliability.

Mitsubishi NF125-HGW-RE Breaker F.A.Q.

What is the procedure for installing the Mitsubishi NF125-HGW-RE Breaker?

To install the Mitsubishi NF125-HGW-RE Breaker, ensure the power is off. Mount the breaker on the DIN rail or panel, connect the load and line side wiring according to the schematic, and tighten all terminals securely.

How do I troubleshoot a tripping Mitsubishi NF125-HGW-RE Breaker?

First, identify the cause by checking for overloads, short circuits, or ground faults. Verify the settings on the breaker and ensure all connections are tight. Use a multimeter to check for continuity and voltage levels.

What is the recommended maintenance schedule for the Mitsubishi NF125-HGW-RE Breaker?

Perform visual inspections monthly, check for wear and tear, and test the breaker operation annually. Clean the breaker and ensure all connections are secure during each inspection.

How can I reset the Mitsubishi NF125-HGW-RE Breaker after it trips?

First, ensure the cause of the trip is addressed. Then, push the breaker handle to the "Off" position and back to the "On" position to reset it.

What tools are necessary for the installation and maintenance of the Mitsubishi NF125-HGW-RE Breaker?

You'll need a screwdriver, torque wrench, multimeter, and insulated gloves for safe installation and maintenance of the breaker.

Are there any specific environmental conditions required for operating the Mitsubishi NF125-HGW-RE Breaker?

The breaker should be operated within a temperature range of -5°C to +40°C and should be protected from excessive dust, moisture, and corrosive environments.

Can I use the Mitsubishi NF125-HGW-RE Breaker in a three-phase system?

Yes, the Mitsubishi NF125-HGW-RE Breaker is designed for both single-phase and three-phase applications. Ensure correct wiring according to your system configuration.

How do I perform a manual test of the Mitsubishi NF125-HGW-RE Breaker functionality?

Use the test button on the breaker, if available. Otherwise, simulate a fault condition to ensure the breaker trips as expected. Always follow safety guidelines when performing tests.

What are the signs that the Mitsubishi NF125-HGW-RE Breaker needs to be replaced?

Signs include frequent tripping without load changes, visible damage, burning smells, or failure to reset properly. If any signs are present, consider replacement.

How do I adjust the trip settings on the Mitsubishi NF125-HGW-RE Breaker?

Consult the breaker manual for detailed instructions. Use a screwdriver to adjust the trip unit settings, ensuring they align with your application requirements.