How do I install a transfer switch in my electrical system?

Transfer switch installation procedure:

• Position in circuit : ATS mounted immediately downstream of main disconnect, upstream of main distribution board. Ensures switch controls entire facility load without exception.
• Primary source connection : Utility feeder (3-phase 400V or single-phase 230V) connects to ATS primary terminals. Include upstream main breaker for utility disconnection.
• Secondary source connection : Generator output (standby genset) connects to ATS secondary terminals. Ensure generator rated capacity exceeds facility peak demand +20% headroom.
• Load output connection : ATS common terminals feed main distribution board via heavy-gauge copper cable sized per IEC 60364 (typically 3×50mm² Cu for 100A+ loads).
• Grounding / earthing : Both sources must have separate earth bars. ATS chassis bonds both earths during switching (critical for safety—IEC 61643 compliance).
• Control wiring : Microcontroller (integrated in automatic ATS) powered from small 230V auxiliary supply or 24V DC battery backup. Enables switching during blackout.
• Testing & commissioning : Apply utility power, verify ATS selects primary source. Simulate utility loss (kill supply or reduce voltage <180V); confirm automatic switch to generator within 8ms. Test return-to-utility logic.

Socomec ATSE automatic switches include isolation indicator lights (green=normal, red=generator mode). Optim-Elec technicians commission dual-source systems per IEC 62930 (automatic transfer equipment). Contact optim-elec.com for design review and commissioning support.