The HMW1 Series Intelligent Versatile Air Circuit Breaker (ACB) is the high-capacity "Main Guardian" of low-voltage power distribution systems. Engineered for AC 50/60Hz networks with rated voltages up to 690V, the HMW1 is designed to handle the massive currents found in the primary incoming lines of factories, power stations, and high-rise commercial complexes.

Beyond simple switching, the HMW1 features a sophisticated micro-processor-based intelligent controller. This allows for high-precision protection against overloads, short-circuits, and ground faults, with fully adjustable time-delay settings. Its "Versatile" design means it can be utilized for both power distribution protection and motor protection, ensuring selectivity and coordination across your entire electrical network.

• High Breaking Capacity (Icu/Ics): Designed to safely interrupt massive fault currents (up to 120kA), preventing catastrophic damage to downstream switchgear and busbars.

• Intelligent Controller Options: Available with Type L (Basic), Type M (Standard), or Type H (Communication) trip units. These provide real-time monitoring of current, voltage, frequency, and harmonics.

• Modular Construction: The breaker is built with a reinforced frame that houses independent arc-chutes, contact systems, and operating mechanisms. This modularity allows for easy on-site inspection and part replacement.

• Zero Arcing Distance: Engineered with advanced arc-extinguishing chambers that contain plasma discharge internally, allowing for more compact switchgear cabinet designs without risking phase-to-phase flashovers.

• Versatile Installation: Available in both Fixed and Withdrawable (Draw-out) versions. The draw-out type features a shutter mechanism to protect operators from live parts when the breaker is removed.

1. Main LV Switchboards: The primary incoming breaker for large factories, chemical plants, and data centers.

2. Power Generation: Main protection for low-voltage generators in wind farms, solar parks, and thermal plants.

3. Automatic Transfer Systems: Used in pairs with mechanical interlocks for utility-to-generator power switching.

4. Infrastructure Hubs: Critical power control for airports, hospitals, and metropolitan transit stations.

• Total Selective Coordination: The adjustable trip curves allow you to perfectly coordinate the HMW1 with downstream MCCBs, ensuring only the faulted branch is isolated while the rest of the plant remains powered.

• Communication Ready: Our Type H controllers support RS485 Modbus-RTU protocols, enabling remote opening/closing and real-time energy data logging into your SCADA or Building Management System (BMS).

• Field-Installable Accessories: A wide range of accessories including shunt trips, undervoltage releases, auxiliary contacts, and motorized operators can be added or replaced easily in the field.

• Rigorous Environmental Testing: Every unit is tested for performance in high-temperature and high-humidity environments, ensuring reliability in tropical and industrial climates.

Q: What is the benefit of the "Draw-out" version?

A: The draw-out version allows for rapid replacement or maintenance without disconnecting the main busbars. It provides a visible isolation gap, ensuring 100% safety for maintenance personnel.

Q: Can the HMW1 handle harmonic-rich environments?

A: Yes. The intelligent controller includes a "True RMS" sensing feature, which ensures accurate tripping even in circuits with high non-linear loads (like VFDs and UPS systems) that cause harmonic distortion.

Q: What is the maximum current rating available?

A: The HMW1 series is available in frame sizes ranging from a compact 1600A frame up to a heavy-duty 6300A frame.