AC LCD Adjustable Current MCLCB

Advanced Protection Capabilities & LCD Digital Interface

Crucial Earth Leakage Protection (IΔn): Unlike standard MCCBs, NUOMAK MCLCBs feature integrated residual current protection to prevent human electric shock and arc-induced electrical fires[1]. Leakage pickup thresholds (mA) and trip delay times can be digitally configured.

Comprehensive Multi-Stage Safeguards: Combines adjustable overload long-time delay (Ir), short-circuit short-time delay (Isd), instantaneous (Ii), and built-in protections against over-voltage, under-voltage, voltage unbalance, and phase loss (phase failure).

Real-Time LCD Visual Monitoring & Fault Memory: The integrated digital display provides live parameter readouts—including 3-phase current, system voltage, operational frequency, and real-time residual leakage current[1]. Trip records and peak fault currents are logged for rapid maintenance diagnostic.

Standards, RS485 Communication & Quality Control

NUOMAK AC LCD Adjustable Current MCLCBs are manufactured under ISO9001 quality systems and strictly comply with IEC/EN 60947-2 (Annex B/M for Residual Current Protection) and CE requirements. Optional RS485 communication modules with Modbus-RTU protocol enable remote monitoring, telemetry, and automated tripping via Building Management Systems (BMS) or smart grid IoT platforms. Every breaker undergoes 100% factory routine testing—including dielectric withstand, leakage trip sensitivity (IΔn), and thermal calibration trials.

Primary Industrial & Commercial Applications

Commercial Real Estate & Public Infrastructure: Centralized branch leakage and overload protection in commercial complexes, hospitals, schools, and outdoor temporary distribution panels.

Industrial Manufacturing & Damp Environments: Protecting heavy industrial equipment, water pumps, HVAC plants, and manufacturing lines where insulation degradation risks ground fault leakage.

EV Charging Stations & Microgrid Networks: Monitoring insulation failure and leakage currents in renewable energy feedlines and electric vehicle charging infrastructure.

What is the key difference between an MCCB and an MCLCB?

An MCCB (Moulded Case Circuit Breaker) provides standard overload and short-circuit protection. An MCLCB (Moulded Case Leakage Circuit Breaker) adds crucial Earth Leakage / Residual Current Protection (IΔn) to safeguard against electric shocks and insulation-fault fires. NUOMAK MCLCBs also feature an LCD screen displaying real-time leakage currents (mA) and power parameters.

Can earth leakage sensitivity (IΔn ) and trip delay times be adjusted on NUOMAK LCD MCLCBs?

Yes. On NUOMAK LCD Adjustable Current MCLCBs, technicians can digitally adjust earth leakage trip thresholds (e.g., 30mA, 100mA, 300mA, 500mA) and trip time delays directly via the LCD panel interface. This prevents nuisance tripping caused by harmless system capacitive currents while maintaining rapid fault clearance.

What is the MOQ and factory lead time for wholesale orders of smart LCD MCLCBs?

For standard catalog stock, our Minimum Order Quantity (MOQ) starts at 10 to 30 units per frame size. For custom OEM branding (private label laser etching, custom casing colors, or specialized Modbus firmware), the MOQ is typically 100 units. Standard production lead time is 15 to 25 business days, complete with ISO9001 and CE test certifications.