Mitsubishi NF250-HEV-MDU Programming Manual

Mitsubishi NF250-HEV-MDU Breaker manual cover
Pages 23
Year 2019
Language(s)
English en

Mitsubishi NF250-HEV-MDU Breaker Specification

The Mitsubishi NF250-HEV-MDU breaker is designed for advanced circuit protection and energy efficiency in high-demand electrical systems. This model offers a rated current capacity of up to 250 Amperes, making it suitable for a variety of industrial and commercial applications. Engineered with precision, it features a compact design that ensures ease of installation and integration into existing electrical panels.

The NF250-HEV-MDU utilizes cutting-edge hybrid electromagnetic and thermal-magnetic trip technology, providing reliable protection against overloads and short circuits while maintaining operational efficiency. It supports a voltage rating of up to 690V AC, accommodating a wide range of electrical environments.

This breaker is equipped with a Modbus Communication Unit (MDU), enabling seamless integration into intelligent energy management systems. The MDU facilitates real-time monitoring and remote control capabilities, enhancing system diagnostics and maintenance. The breaker is designed to comply with international standards such as IEC 60947-2, ensuring high performance and safety.

Mitsubishi's breaker boasts a robust construction with a high interrupting capacity, ensuring durability and resilience under high fault conditions. It is also engineered for low power loss, promoting energy savings and reducing operational costs. The breaker is designed with user-friendly features, including clear status indicators and adjustable trip settings, allowing for customization to meet specific application needs.

Overall, the Mitsubishi NF250-HEV-MDU breaker combines advanced protection features with innovative communication capabilities, making it an ideal choice for modern electrical distribution systems that require efficiency, reliability, and connectivity.

Mitsubishi NF250-HEV-MDU Breaker F.A.Q.

What is the proper procedure for installing the Mitsubishi NF250-HEV-MDU Breaker?

Ensure the power is turned off before installation. Mount the breaker in the designated panel, connect the line and load wires to their respective terminals, and torque the connections according to the manufacturer's specifications.

How can I reset the Mitsubishi NF250-HEV-MDU Breaker after it trips?

First, determine and rectify the cause of the trip. Once resolved, move the breaker handle to the "OFF" position and then back to the "ON" position to reset it.

What are common troubleshooting steps if the breaker fails to close?

Check for mechanical obstructions, verify proper alignment of the breaker in the panel, and ensure that there are no loose connections. If the issue persists, inspect for internal damage or contact a professional technician.

How often should maintenance be performed on the Mitsubishi NF250-HEV-MDU Breaker?

Routine maintenance should be performed annually, including visual inspections, tightening connections, and testing the breaker operation. Additional inspections should be carried out after any major electrical disturbance.

What safety precautions should be taken during maintenance of the breaker?

Always disconnect the power supply and wear appropriate personal protective equipment (PPE) such as gloves and safety glasses. Follow all lockout/tagout procedures to ensure safety.

What are the signs of a failing Mitsubishi NF250-HEV-MDU Breaker?

Signs include frequent tripping, visible damage or wear, unusual noises, and overheating. If you notice any of these signs, further investigation or replacement may be necessary.

Can the Mitsubishi NF250-HEV-MDU Breaker be used in outdoor applications?

The breaker is designed for indoor use in a controlled environment. If outdoor installation is necessary, it must be housed in a suitable enclosure that provides protection against environmental factors.

What should I do if the breaker does not fit into the panel?

Double-check the breaker and panel specifications to ensure compatibility. If they are incompatible, consult with the manufacturer for suitable alternatives or modifications.

How do I determine the correct torque settings for the breaker terminals?

Refer to the manufacturer's installation manual or data sheet for the specific torque settings required for the line and load terminals. Using a torque wrench, apply the specified torque to ensure secure connections.

Is it possible to upgrade the Mitsubishi NF250-HEV-MDU Breaker to a higher current rating?

No, breakers cannot be modified or upgraded to a higher current rating. If a higher current capacity is needed, select a breaker with the appropriate rating and ensure the panel and wiring can support the increased load.