1. Introduction
The Dual Power Automatic Transfer Switch (ATS) is a critical component in power distribution systems, designed to ensure uninterrupted power supply by automatically switching between Normal (Primary) Power and Reserve (Backup) Power sources. This device is rated for 400V, 160A, 50/60Hz and is ideal for industrial, commercial, and critical infrastructure applications where power continuity is essential.
The ATS operates based on voltage sensing, ensuring that if the Normal Power fails, it seamlessly transitions to the Reserve Power (if available) within a switching time of less than 2.5 seconds. Importantly, this switch does not control the generator—it only selects between available power sources.
This manual provides detailed instructions on operation modes (Automatic & Manual), wiring, safety precautions, and maintenance guidelines.
2. Key Features & Specifications
2.1 Electrical Ratings
Rated Voltage: 400V AC (Three-Phase)
Rated Current: 160A
Frequency: 50Hz / 60Hz (Auto-Compatible)
Switching Time: <2.5 seconds
Switching Mechanism: Electromechanical (Motorized) / Solid-State (Optional)
2.2 Operational Modes
Automatic Mode:
The ATS continuously monitors the Normal Power supply.
If Normal Power is available, the switch remains connected to it.
If Normal Power fails and Reserve Power is available, the ATS automatically switches to Reserve Power.
Once Normal Power is restored, the ATS switches back automatically (with built-in delay to avoid frequent switching).
Manual Mode:
The user can override automatic operation and manually select Normal Power or Reserve Power using the selector button.
Useful for maintenance, testing, or emergencies.
2.3 Safety & Protection Features
Prevents Simultaneous Connection: Ensures Normal and Reserve power sources are never connected simultaneously (anti-islanding protection).
Undervoltage & Overvoltage Protection: Prevents switching if voltage is outside safe limits.
Short-Circuit Protection: Built-in circuit breakers or fuses for overload protection.
Mechanical Interlock: Ensures only one power source is engaged at a time.
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