The ATS System, available in ATS12-P and ATS12-3P models, is an Automatic Transfer Switch designed to manage power supply between a main power source (mains) and an emergency generator. Its primary function is to automatically switch to the generator when the mains power fails and revert to mains power when it is restored, ensuring an uninterrupted power supply to the connected load.
Function Description:
The ATS system operates on an SCM core with digital technology, providing automatic control and management of the power transfer process. When the mains power supply is interrupted, the ATS system will initiate the generator within 2-6 seconds. After the generator runs for an additional 5-6 seconds to stabilize, the system will transfer the load to the generator's power supply. Conversely, when the mains power supply is restored, the ATS system automatically switches the load back to the main power supply, and the generator will stop after running for 2-6 seconds without load. This automatic operation eliminates the need for human intervention during power outages. The system also records any transfer failures, indicating the need for inspection and re-setup by an engineer. A key safety feature is its design to prevent simultaneous operation of both mains and generator power supplies.
For manual control, the ATS system includes a mode switch with "AUTO," "TEST," and "OFF" positions. In "AUTO" mode, the system functions automatically as described above. The "TEST" position allows for manual starting of the generator, useful for maintenance or testing purposes. The "OFF" position deactivates the automatic transfer function, preventing the ATS system from operating automatically.
The device features a front panel with LED indicators for "Generator Power" and "Mains Power," which illuminate to show the active power source. A "LED5 Display" (likely a digital display) shows the "OUTPUT VOLT (V)," providing real-time voltage information.
Important Technical Specifications:
While specific numerical values for voltage, current, and power are not explicitly stated in the provided manual excerpts, several critical technical aspects are highlighted:
- Power Capacity: The ATS power must be greater than the connected load power. This is a fundamental requirement for safe and effective operation.
- Protection: An air-breaker (differential circuit breaker) is mandatory for protecting the ATS system when connecting the mains power cable to the ATS box. For the French version, a 30mA differential circuit breaker is specified upstream, between the network meter and the ATS.
- Generator Compatibility: The ATS system is designed to connect to a generator control panel via a communication cable.
- Battery Charger: The ATS box includes an internal battery charger that automatically charges the generator's battery when the mains power supply (220VAC) is available. The English manual specifies a charge current of 1A.
- Wiring Diagrams: The manual provides wiring diagrams for both single-phase (ATS12-P) and three-phase (ATS12-3P) configurations, indicating connections for "HOUSE NET input," "Generating input," and "Power output." These diagrams detail the connections to the charger, contactor, and controller components within the ATS box.
Usage Features:
- Automatic Operation: The primary feature is its fully automatic transfer capability between mains and generator power, ensuring continuous power supply.
- Easy Installation and Operation: The system is designed for straightforward installation and user-friendly operation.
- Manual Control: The "TEST" mode allows for manual generator startup, offering flexibility for maintenance or specific operational needs. The "OFF" mode allows for disabling automatic operation.
- Error Recording: The system retains error records in case of transfer failures, aiding in troubleshooting and maintenance.
- Safety Warnings: Prominent warnings on the device itself and in the manual emphasize the risk of electrical shock and the importance of qualified personnel for inspection and repair. Users are explicitly warned not to remove the cover or manipulate the interior while connected due to high voltage.
- Startup Attempts: The ATS system attempts to start the generator three times if it fails to start successfully on the first attempt. Each attempt is followed by a 5-second wait. If the generator fails to start after three attempts, the system will trigger a fault alarm.
- Generator Contact Key: For automatic operation, the generator's contact key must remain in the "OFF" position (or not be engaged, as per the French manual).
Maintenance Features:
- Automatic Battery Charging: The integrated battery charger automatically maintains the generator's battery, ensuring it is ready for use during power outages. This feature operates whenever the ATS system receives 220VAC mains power.
- Qualified Service Personnel: The manual explicitly states that only qualified electricians or service personnel should open the ATS box for inspection or repair, highlighting the high voltage danger and the absence of user-serviceable parts inside.
- Initial Generator Test: Before relying on automatic operation, it is recommended to test the generator in the "OFF" position to ensure it functions correctly, then switch to "AUTO" mode.
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