Automatic Phase Switch ZAMEL APM-10 16A 230V/3×400V+N (EXT10000202)

ZAMEL APM-10 is an automatic three-phase phase switch rated for 16 A, designed for 230 V control circuits and 3×400 V+N power systems. The device continuously monitors the presence and quality of all three phases and automatically transfers the load to an available phase if one phase fails or falls outside acceptable parameters. Intended for protection of single-phase appliances and critical electrical equipment in residential and small commercial installations, the APM-10 maintains continuity of supply while preventing damage from phase loss or phase imbalance.

Advantages

The APM-10 provides automatic, uninterrupted switching between phases without manual intervention, reducing downtime for connected devices. Its compact design allows installation in standard distribution boards and minimizes occupied DIN rail space. The unit supports reliable protection for single-phase loads by monitoring phase presence and implementing fast transfer to a healthy phase, which helps avoid overheating and equipment malfunction caused by missing or unstable phases.

Suitable for

• Protection of single-phase household appliances (heating, refrigeration, pumps)
• Continuity of power for critical equipment in small offices and retail
• Backup phase switching in locations with unstable or asymmetric supply
• Integration into distribution boards for residential and light commercial buildings

Key specifications

• Operational current rating: 16 A
• Control voltage: 230 V AC
• Rated power system: three-phase 3×400 V with neutral
• Automatic phase monitoring and transfer function
• DIN-rail mountable enclosure for distribution board installation

How to use

Install the APM-10 in the distribution board according to local electrical standards, connecting the three incoming phases, neutral and the outgoing load conductor as indicated in the installation manual. Ensure the control supply is 230 V and that protective devices upstream (circuit breakers or fuses) match the operational current rating. After correct wiring and commissioning, the device will continuously monitor the phases and automatically switch the load to an available phase when needed. Regular visual inspection and periodic testing of protective devices are recommended to confirm correct operation.

Usage recommendations

Use appropriate upstream overcurrent protection sized for the connected load and the device rating. Verify compatibility with connected equipment, especially motors and sensitive electronics, and follow local wiring regulations during installation. For installations with frequent phase disturbances, consider complementary surge protection and professional commissioning to ensure stable and safe operation.