Eaton 6D32360G03 ATC-300R

The ATC‑300R is a digital controller designed by Eaton to work with automatic transfer switches (ATS) ranging from 3 kVA to 300 kVA. It monitors the status of the main power supply, backup power supply, and generator, and completes switching within milliseconds when the main power fails to ensure uninterrupted power supply to the load. Adopting a modular structure, this controller can be sold separately and is suitable for power backup systems in various industrial, commercial, and critical facilities.

Key Technical Specifications

• Model: 6D32360G03 ATC‑300R (also known as ATC‑300+)
• Voltage: 480 V AC (600 V AC optional)
• Current Range: 40 A – 400 A (corresponding to 3 kVA – 300 kVA ATS)
• Pole Configuration: 2 / 3 / 4 poles optional
• Dimensions: Width 6.5 in (165 mm), Height 8.5 in (215 mm), Depth 2.23 in (59 mm)
• Weight: Approximately 4.1 lb (1.86 kg)
• Operating Temperature: 0 °C ~ 40 °C (Storage: 0 °C ~ 80 °C)
• Compliance Standards: UL 1008, NEMA, NEC, ANSI/NFPA 70, FCC Part 15

Product Features

• Full Digital Control: Uses a microprocessor to achieve fast and reliable power detection and switching.
• Multi-Source Monitoring: Simultaneously monitors the status of two power sources (Utility 1, Utility 2) and the generator, with indicator lights showing “Available” and “Connected”.
• Human-Machine Interface (HMI): The front panel is equipped with function keys such as “Engine Test”, “Help/Lamp Test”, “Step/Enter”, and “Increase/Decrease”, facilitating on-site testing, parameter setting, and troubleshooting.
• Fast Switching: Detection time ≤ 2 ms, automatic transfer time ≤ 4 ms (or shorter), realizing millisecond-level seamless switching.
• Flexible Installation: Offers NEMA 1 or NEMA 3R enclosures, supports fixed or draw-out circuit breakers, and is compatible with various distribution cabinet layouts.
• Alarm and Reset: Features independent alarm indicators and an “Alarm Reset” button for quick resumption of operation.

Structure and Composition

• Power Input Module: Two power input terminals with visual status indicators.
• Control Processing Unit: Microprocessor motherboard responsible for logical operations, timing, and communication.
• HMI Panel: Buttons, indicator lights, and a display screen for local operation and status monitoring.
• Communication Interfaces: Optional RS‑485, Modbus, or Ethernet for remote monitoring and integration.
• Installation Accessories: Front panel, sealing gasket, self-tapping screws, front mounting plate, etc., to ensure protection level and mechanical fixation.

Typical Application Areas

• Data Centers and Server Rooms: Ensure IT equipment quickly switches to backup generators when the main power fails.
• Hospitals and Medical Facilities: Critical medical equipment (surgical lights, monitors) requires uninterrupted power supply.
• Industrial Production Lines: Production equipment, PLC control systems, etc., have high requirements for power continuity.
• Commercial Buildings: Backup power supply for public facilities such as elevators, security systems, and lighting.
• Public Infrastructure: Critical infrastructure such as airports, railway signals, and communication base stations.

Installation Guidelines

• Model Selection and Matching: Select the appropriate ATS rating (40 A – 400 A) based on load current and voltage.
• Enclosure Installation: Choose NEMA 1 (indoor) or NEMA 3R (rainproof) enclosure according to on-site needs, and reserve a heater (for 3R enclosures) to prevent moisture.
• Wiring Layout: Connect main power, backup power, and load terminals to corresponding terminals respectively, ensuring consistent phase sequence.
• Grounding and Protection: All metal enclosures must be reliably grounded in accordance with local electrical codes.
• Commissioning and Testing: Use the “Engine Test” and “System Test” functions on the panel to verify the generator startup, switching, and recovery processes.

Maintenance and Upkeep

• Regular Inspection: Check power indicators, wiring tightness, and panel button functions every 6 months.
• Cleaning and Dust Prevention: Keep the controller enclosure clean to prevent dust from entering internal electronic components.
• Firmware Upgrade: If a new version of firmware is available, update it in accordance with Eaton’s provided upgrade guide to obtain the latest functions and security patches.
• Fault Recording: Export fault records using the built-in alarm log or external communication interfaces (Modbus/ Ethernet) to facilitate trend analysis and preventive maintenance.
• Spare Parts Management: Keep spare panel buttons, indicator lights, and power modules on hand to shorten maintenance downtime.

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