The YCQ6s series is a PC-class Automatic Transfer Switch (ATS), designed for use in two source neutral-earthed systems operating at AC 50/60 Hz, rated voltage up to 400V, and rated operating current from 16A to 630A. It automatically transfers the supply between sources upon detection of an abnormality in one source, ensuring reliable and safe power continuity. Widely used for automatic transfer between the primary (normal) supply and secondary (standby) supply in power distribution systems, as well as automatic changeover between two load circuits and safe electrical isolation.
Standard: IEC 60947-6-1
| Company code |
Test category | Current | Functions | Functions |
| YCQ6s | 100 | 4 | A | 100A |
| YCQ6s | 100 160 250 400 630 |
3P 4P |
A: Basic Type B: Enhanced Type |
6A 10A 16A 20A 25A 32A 40A 50A 63A 80A 100A 125A 160A 180A 200A 225A 315A 400A 500A 630A |
1. Ambient air temperature: -5°C to +40°C; 24-hour average temperature not exceeding+35°C.
2. At a maximum temperature of +40°C, relative humidity shall not exceed 50%; maximum monthly average relative humidity: 90%. Higher relative humidity is permissible at lower temperatures. Special measures shall be taken against condensation caused by occasional temperature variation.
3. Installation altitude: not exceeding 2000 m above sea level.
4. Pollution degree: Pollution Degree 3.
5. Utilization categories: AC-31A, AC-33A, AC-33iB.
6. Applicable to Environment A. Use of this product in Environment B may cause harmful electromagnetic interference; in such cases, the user shall take appropriate mitigation measures.
| Model / Specifcation | Unit | YCQ6s-100 | YCQ6s-160 | YCQ6s-250 | YCQ6s-400 | YCQ6s-630 |
| Number of Poles | 3,4 | |||||
| Applicable Standard | IEC60947-6-1 | |||||
| Device Class | PC Class | |||||
| Utilization Category | AC-33iB | |||||
| Rated Insulation Voltage Ui | V | 690 | ||||
| Rated Impulse Withstand Voltage Uimp | kV | 8 | ||||
| Rated Operating Voltage Ue | V | A400 | ||||
| Rated Operating Current Ie | A | 20,40,60,80,100 | 100,125,160 | 200,250 | 315,350,400 | 500,630 |
| Rated Making Capacity Icm | kA | 10Ie | ||||
| Rated Conditional Short-Circuit Current Iq | kA | 120 | ||||
| Rated Short-Time Withstand Current Icw | KA/1s | 7 | 9 | 13 | ||
| Control Supply Voltage | V | AC230 | ||||
| Transfer Time | S | 0.45 | 0.6 | |||
| Function | Feature | Controller Type | |
| Type A | Type B | ||
| I (Normal) / II (Standby) Indication & Signal Output | Power supply indication | ■ | ■ |
| Closed position indication | ■ | ■ | |
| Active signal output port for power supply indication | - | ■ | |
| Closed position status signal output port | - | ■ | |
| Voltage Monitoring | Phase voltage | Single-phase | Three-phase |
| Phase loss detection | - | ■ | |
| Overvoltage detection | - | ■ | |
| Undervoltage detection | - | ■ | |
| Transfer Mode | Auto-transfer with auto-restoration | ■ | ■ |
| Auto-transfer without auto-restoration | - | ■ | |
| Fire System Interlock | Passive fre system interlock | ■ | - |
| DC 24V fre system interlock | - | ■ | |
| Other Functions | Generator start function | ■ | ■ |
| Voltage and frequency monitoring & detection | - | ■ | |
| LCD display | - | ■ | |
| RS-485 communication port | - | ■ | |
100A-630A Basic Type Wiring
Enhanced Type Wiring
| Specifcation | External Dimensions (mm) | Mounting Dimensions (mm) | |||||||||||||||||||
| In | A | A1 | B | B1 | C | E | G | J | K | L | N | P | R | S | T | U | W | X | Y | Y1 | Y2 |
| 100A | 280 | 240 | 130 | 144 | 153 | 115 | 125 | 230 | 85 | 6.5 | 83 | 30 | 14 | 18 | 2.5 | 105 | 125 | 6.2 | 38 | 89 | 39.5 |
| 160A | 330 | 295 | 149 | 172 | 204 | 168 | 125 | 283 | 110 | 7 | 85 | 36 | 20 | 25 | 3 | 134 | 145 | 9 | 61 | 135 | 66 |
| 250A | 385 | 360 | 180 | 190 | 220 | 183 | 125 | 350 | 110 | 7 | 90 | 50 | 25 | 30 | 3 | 134 | 158 | 11 | 65 | 147 | 68.5 |
| 400A | 445 | 436 | 255 | 255 | 280 | 243 | 125 | 424 | 180 | 11 | 90 | 65 | 40 | 50 | 5 | 208 | 173 | 11 | 86 | 200 | 75 |
| 630A | 445 | 436 | 276 | 276 | 280 | 243 | 125 | 424 | 180 | 11 | 90 | 65 | 40 | 50 | 5 | 208 | 173 | 13 | 86 | 200 | 75 |
The YCQ6s Automatic Transfer Switch is used to automatically transfer power between a normal power supply and a standby power supply when an abnormal condition is detected. It helps ensure reliable power continuity in power distribution systems, generator backup systems, and dual power supply applications.
The YCQ6s Series Automatic Transfer Switch is available with rated operating currents from 16A to 630A, covering models such as 100A, 160A, 250A, 400A, and 630A frames. It supports 3-pole and 4-pole configurations for different distribution requirements.
Type A is the basic controller type, suitable for standard automatic transfer applications. Type B is the enhanced controller type, offering more advanced functions such as three-phase voltage monitoring, phase loss detection, overvoltage and undervoltage detection, LCD display, RS-485 communication, and auto-transfer without auto-restoration.
Yes. The YCQ6s Automatic Transfer Switch supports generator start function, making it suitable for power systems where a standby generator is used as the backup power source.
The YCQ6s Series Automatic Transfer Switch complies with IEC 60947-6-1. It is a PC-class ATS designed for AC 50/60Hz systems with rated operating voltage up to 400V.
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