Yueyang Tongtu supplies the Schneider WATSN-160/125b/4A ATS for industrial maintenance, electrical replacement, and power distribution projects requiring verified Schneider components. The unit is designed to manage load transfer between two independent power supplies by monitoring source conditions and switching the connected load when abnormal voltage, phase loss, or power interruption occurs.
Technical Specifications Matrix
| Parameter / Feature | Technical Specification |
| Model Designation | Schneider WATSN-160/125b/4A |
| Product Type | Dual Power Automatic Transfer Switch (ATS) |
| Frame Current Rating (Inm) | 160A |
| Rated Operational Current (Ie) | 125A |
| Number of Poles | 4-Pole (4P - Switched Neutral) |
| Control Voltage (Us) | 220V AC (50/60Hz) |
| Operating Modes | Self-Throwing/Self-Restoring, Mutual Standby, Manual Override |
| Interlocking Protection | Integrated Mechanical & Electrical Double Interlock |
| Mechanical Life | ≥8,000 operations |
| System Interface | Built-in Remote PLC Control & Status Monitoring Terminals |
The Schneider WATSN-160/125b/4A uses a 4-pole switching design, disconnecting and transferring:
· L1 phase
· L2 phase
· L3 phase
· Neutral conductor
This configuration is commonly applied in three-phase four-wire systems where neutral switching is required to maintain separation between independent power supplies.
The ATS supports automatic switching between the main and standby power sources while also providing manual operation capability for commissioning, inspection, and maintenance procedures.
The manual operating mechanism allows technicians to select the required switching position during service operations.
The integrated interlocking structure prevents both power sources from closing simultaneously.
Mechanical interlocking provides physical prevention, while electrical interlocking works with the control circuit to reduce the possibility of incorrect switching operations.
This design helps protect downstream equipment from phase-to-phase short circuit risks caused by unintended dual-source connection.
The ATS uses a dedicated power contact system designed for repeated switching operations under rated conditions.
The contact structure is engineered to maintain stable electrical connection during normal operation while reducing contact wear during repeated transfer cycles.
The WATSN series provides auxiliary connection interfaces for status feedback and control integration.
It can be used with:
● PLC control systems
● Building management systems (BMS)
● Electrical monitoring systems
for remote status monitoring and power management applications.
Yueyang Tongtu verifies product identification information including:
1. Model designation
2. Nameplate information
3. Terminal configuration
4. Physical condition
before shipment.
Each unit is prepared with protective packaging suitable for international transportation to reduce damage risks during handling and delivery.
For purchasing and maintenance projects, Yueyang Tongtu can provide:
● Product quotations
● Technical specifications
● Product photos
● Packing information
● Procurement assistance
A: "160" indicates the frame rating (), "125b" specifies the rated operational breaker current, "4" represents a 4-pole configuration (isolating 3 phases + neutral), and "A" denotes the controller type for automatic transfer functionality.
A: Yes. The unit includes a manual handle feature that allows maintenance teams to manually switch between Power I, Power II, or force the switch into a double-OFF (neutral zero) position for system isolation.
A: The WATSN series integrates an onboard control unit. Connecting the incoming power lines ( sampling) enables automatic detection and switching without requiring external controller modules.
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No. 324, Hubin Street, Nanhu New District, Yueyang City, Hunan Province, China
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