The NH40 Series Automatic Transfer Switch (ATS) is a critical solution for ensuring uninterruptible power supply in industrial, commercial, and residential environments. Specifically designed to automatically switch between a primary power source (Utility) and a backup source (Generator or Secondary Transformer), the NH40 ensures your critical loads remain energized during a grid failure.

With a wide current range from 100A to 3150A, the NH40 integrates the switch body and the controller into one compact unit. It monitors the voltage of both sources in real-time, providing a seamless transition with zero manual intervention required. Whether it’s a high-rise building, a hospital, or a manufacturing plant, the NH40 is built to maintain "business as usual" even when the grid goes down.

• Integrated Intelligent Controller: The built-in control logic monitors phase-failure, undervoltage, and overvoltage. It automatically triggers the transfer sequence based on user-defined parameters.

• Mechanical & Electrical Interlocking: Safety is paramount. The NH40 features a robust internal mechanical interlock combined with electrical interlocking to ensure both power sources can never be connected simultaneously, preventing catastrophic short circuits.

• High Breaking Capacity & Reliability: Engineered to handle high-current switching under load. The silver-alloy contacts provide excellent conductivity and are resistant to arcing and oxidation over thousands of operations.

• Three Working Positions: Supports Source I, Source II, and a Zero (Neutral) position. The neutral position is essential for maintenance and prevents transient current surges during the transition.

• Manual/Auto Modes: Includes a reinforced manual handle and a mode selector switch, allowing maintenance crews to override the automation for testing or emergency servicing.

1. Hospitals & Healthcare: Ensuring life-saving equipment remains powered during municipal grid outages.

2. Data Centers & Telecom: Protecting servers and networking equipment from downtime and data loss.

3. Industrial Manufacturing: Preventing costly production line stalls by automatically engaging backup generators.

4. High-Rise Buildings: Managing power for elevators, emergency lighting, and fire suppression systems.

• Turnkey Dual-Power Solution: The NH40 replaces the need for complex, DIY contactor-based transfer systems, reducing wiring errors and cabinet space requirements.

• Fire-Safety Approved: The housing is constructed from high-grade, flame-retardant materials designed to withstand the heat generated during high-current switching.

• Global Compatibility: Fully compliant with IEC 60947-6-1 (the international standard for transfer switching equipment), making it ready for use in international projects and tenders.

• Generator Start Signal: Includes integrated dry contacts to automatically send a "Start" signal to your backup generator as soon as utility power fails.

Q: Does this switch provide an "OFF" position during the transition?

A: Yes. The NH40 is a three-position switch. It moves from Source I to a center-OFF position before engaging Source II. This ensures that the residual magnetism in motors and transformers dissipates before the new source is connected.

Q: Can I use this for a 1-Phase system?

A: While designed for 3-Phase systems, the NH40 can be used in 1-Phase applications by utilizing the appropriate poles, though we recommend consulting our technical team for the wiring schematic.

Q: What happens when the Utility power returns?

A: In "Auto" mode, the controller monitors the stability of the Utility power for a preset time. Once it confirms the grid is stable, it automatically switches back from the Generator to the Utility and sends a signal to cool down and shut off the generator.