The YCQ9Ms series Automatic Transfer Switch (ATS) is a dual-power automatic switching device designed for AC 50/60Hz systems, with a rated operational voltage up to 400V and a rated current up to 800A. It ensures continuous power supply by automatically transferring the load to an alternative source or starting a generator when the main power supply experiences overvoltage, undervoltage, or phase loss. Ideal for critical applications where power interruption is not acceptable.
Hospitals, shopping malls, banks, hotels, high-rise buildings
Fire protection systems and other sites requiring uninterrupted power supply
Rated Specifications: 100A, 4 poles (4P)
Compliance: Meets IEC 60947-6-1 standards
Communication: Built-in RS485 interface, MODBUS-RTU protocol for remote monitoring, configuration, and control
Control Modes: Manual and automatic operation with multiple switching logics (auto-transfer auto-recovery, auto-transfer non-recovery, mutual standby)
Protection Functions: Three-phase overvoltage, undervoltage, and phase-loss monitoring with adjustable setpoints
Display & Operation: Standard split-type LED display with voltage, frequency, and status indicators; manual/auto mode selection buttons on panel
| Item | Specification |
|---|---|
| Rated Operational Current (In) | 100A |
| Number of Poles | 4P |
| Rated Operational Voltage (Ue) | AC400V |
| Rated Insulation Voltage (Ui) | AC690V |
| Utilization Category | AC33iB |
| Electrical Life | 10,000 operations |
| Mechanical Life | 5,000 operations |
| Transfer Time | ≤ 4s |
| Power-off Delay | 1–240s adjustable |
| Closing Delay | 1–240s adjustable |
| Operating Temperature | -5°C to +40°C |
| Installation Altitude | ≤ 2000m |
Automatic/manual dual-power switching
Real-time three-phase voltage monitoring and protection
Generator start/stop control (dry contact output)
Fire signal interface (passive contact input)
Voltage and frequency display (optional)
Fault indication and alarm output
Suitable for three-phase four-wire systems; phase sequence of main and alternative power must be consistent.
For 4-pole switches, connect the neutral wires of both power sources to the corresponding circuit breaker N poles.
Ensure reliable grounding of the switch enclosure.
Split-type controller mounts separately on panel; verify all connections are secure before energizing.
Model: YCQ9Ms-125/4P
Frame Size: 125A
Rated Current: 100A
Controller Type: W2 (Split LED Display)
Poles: 4P
Note: The above information is based on the YCQ9Ms series catalog. Specific configurations can be customized according to project requirements, including controller type and display options.
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