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Used controller in China

  • NCM1-250DC 500V Molded Case Circuit

    NCM1-250DC 500V Molded Case Circuit Breaker

      NCM1-250DC Molded Case Circuit Breaker NCM1-250DC PV DC circuit breaker is designed to provide overcurrent within appliances or electrical equipment, where a branch circuit protection is already provided or not r...

      Wenzhou, China
    • NCM1-630DC 750V Molded Case Circuit

      NCM1-630DC 750V Molded Case Circuit Breaker

        NCM1-630DC Molded Case Circuit Breaker NCM1-630DC PV DC circuit breaker is designed to provide overcurrent within appliances or electrical equipment, where a branch circuit protection is already provided or not r...

        Wenzhou, China
      • NCM1-630DC 1000V Molded Case Circuit

        NCM1-630DC 1000V Molded Case Circuit Breaker

          NCM1-630DC Molded Case Circuit Breaker NCM1-630DC PV DC circuit breaker is designed to provide overcurrent within appliances or electrical equipment, where a branch circuit protection is already provided or not r...

          Wenzhou, China
        • AEG RC+ GB Molded Case

          AEG RC+ GB Molded Case Circuit Breaker

          • Manufacturer: AEG

          RC+ series Molded Case Circuit Breaker, its rated insulation voltage can reach 1000V, suitable for AC 50/60Hz, rated working voltage is 400V, rated working current is 800A, circuit breaker can be used for distrib...

          China
        • AEG RC+ Z6 Molded Case

          AEG RC+ Z6 Molded Case Circuit Breaker

          • Manufacturer: AEG

          RC+ series Z6 molded case circuit breaker not only takes into account performance and appearance, but also considers the practical use in many aspects. The Rated insulation voltage is 800V, which is suitable for ...

          China
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        Overview

        Molded case circuit breakers (MCCBs) are low-voltage protection devices that interrupt overloads and short circuits. They combine a molded insulating case with adjustable thermal-magnetic or electronic trip units, offering broad ampere ranges and high interrupting capacity. MCCBs are used in industrial panels, motor control and building distribution where precise trip settings and fault tolerance are required. Selection depends on frame size, trip type, voltage rating and interrupting capacity (kA).

        FAQ

        What should I consider when buying a used MCCB?

        Check ampere rating, interrupting capacity (kA), trip unit type (thermal‑magnetic or electronic), frame vs. trip rating, physical condition, signs of overheating or corrosion, service history, and compatibility with your panel bus and standards.

        How do I ensure an MCCB is shipped safely?

        De‑energize and tag the breaker, protect and cap terminals, pack in a sturdy crate or pallet with moisture protection, immobilize the unit, use a carrier experienced with electrical equipment and insure the shipment.

        What is a practical maintenance schedule for an MCCB?

        Perform visual inspections monthly/quarterly, clean dust, torque terminals after installation, exercise trip mechanism and perform trip tests annually or per manufacturer, and run insulation/thermal checks yearly.