Smart Auto-Reclosing MCCB MTM5EL

MTM5EL

The MTM5EL Smart Auto-reclosing MCCB is a high-performance, intelligent safety solution designed for AC 50Hz power distribution networks with auto-recloser funcition. With a rated insulation voltage of 800V and support for currents up to 630A, it provides comprehensive protection against indirect contact, insulation damage, and fire hazards. Powered by a 32-bit ARM microprocessor, the MTM5EL offers real-time signal processing and digital control for modern electrical systems.

• Current Ratings: 125A, 250A, 400A, 630A.
• Voltage Standards: Rated 400V; Insulation 800V; Impulse 8000V.
• Protection Functions: Overload, short-circuit (3-stage), over/under voltage, phase loss, and leakage.
• Leakage Settings: 100mA to 1000mA (or Automatic/OFF).
• Auto-Reclose Time: 20s to 60s.
• Life Cycle: Up to 10,000 operations.

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Features & Advantages

feature

Intelligent Control & Monitoring

• High-Performance Processing: Uses a 32-bit ARM microprocessor for high-speed signal processing and intelligent control.
 User Interface: Features a friendly LCD screen with Chinese display for easy operation and man-machine interaction.
• Real-Time Tracking: Provides real-time monitoring of three-phase voltage, load current, and residual current.
• Adjustable Settings: Allows for online modification and setting of all protection parameters and functions.

Advanced Data & Communication

• Remote Management: Equipped with an RS485 interface supporting DL/T-645 and Modbus protocols for remote signaling, measurement, control, and adjustment.
Fault Memory: Identifies, displays, and stores trip types (e.g., leakage, overload, undervoltage) for later query and analysis.
Maintenance Tools: Includes built-in mechanical test modes, self-check programs, and peak value recording (maximum/minimum) for voltage and current.

Technical Performance Standards

Voltage Ratings: Rated insulation voltage of 800V and rated work voltage of AC 400V.
Durability: Designed for high operational performance, reaching up to 10,000 total operations for certain frame sizes.
Compliance: Fully complies with international and national standards such as GB 14048.1 and GB 14048.2.

Intelligent Core & High-Tech Hardware

Advanced Processing: Equipped with a high-performance 32-bit ARM microprocessor for real-time signal processing and intelligent control.
Wireless Connectivity: Features HPLC pluggable modules and micro-power Bluetooth for wireless communication.
Remote Maintenance: Supports online remote upgrades for maximum user convenience.

Target

Application Areas

  • 01

    TT Distribution Networks

    Specifically designed for three-phase four-wire power systems where the neutral point is directly grounded.

  • 02

    Commercial and Industrial Fire Prevention

    Provides essential protection against fire hazards caused by equipment insulation damage or ground fault currents.

  • 03

    Remote or Unmanned Sites

    Utilizing the smart auto-reclosing function (20s–60s) to restore power automatically after transient faults without manual intervention.

  • 04

    Smart Grid Remote Management

    Ideal for systems requiring remote signaling, measurement, and control via RS485 communication protocols.

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