| Item | Specification |
| Brand | EPEPRO |
| Model | EPM3-100E/4P |
| Product Type | Automatic Transfer Switch |
| Pole Number | 4P |
| Rated Current | 63A |
| Rated Insulation Voltage (Ui) | AC690V |
| Rated Operational Voltage (Ue) | AC400V |
| Frequency | 50/60Hz |
| Utilization Category | AC-31B |
| ATS Class | PC Class |
| Control Voltage | AC220V |
| Auxiliary Circuit | AC220V 50Hz |
| Contact Transfer Time | ＜50ms |
| Operating Transfer Time | ＜50ms |
| Return Transfer Time | ＜50ms |
| Power Off Time | ＜50ms |
| Rated Short-Circuit Current | 50kA |
| Impulse Withstand Voltage | 8kV |
| Terminal Type | Screw Terminal |
| Installation Method | 35mm DIN Rail |
| Standard | IEC60947-8-1 |
| Mechanical Life | 5000 Cycles |
| Electrical Life | 2000 Cycles |
| Working Voltage Range | 85%-110% Us |
| Product Category | Utility Power Type / PV Type |
The EPEPRO EPM3 Series 4P Automatic Transfer Switch is designed for reliable power transfer between the main power source and backup power source in three-phase four-wire systems. Available in 32A, 63A and 100A ratings, the switch provides automatic and manual operation modes for uninterrupted power supply.
Built with PC-class switching technology, the EPM3 Series allows safe load transfer without generating short-circuit current during switching. The device is suitable for commercial buildings, industrial facilities, generator systems and critical power distribution applications.
With fast transfer performance of less than 50ms, the ATS automatically switches to backup power when the main power source fails and returns to normal power when utility power is restored.
