Introduction

ATS/AMF is the intelligent core of any emergency generator setup. Done right, transfers between mains and genset are fast, safe and predictable.

1) Definitions & differences

• AMF: monitors utility, detects failure, issues start, warm-up and supervision.
• ATS: the automatic transfer switch moving load between utility and the genset.

2) Transfer classes & power quality

For sensitive loads, use short-break classes or Closed Transition (synchronised). For truly seamless power, pair the ATS with an online UPS.

3) Critical settings

• Start delay and genset warm-up
• Voltage/frequency windows for transfer/retransfer
• Return-to-mains delay to avoid flapping
• Event/alarm logging for diagnostics

4) Safety & installation standards

• Mechanical/electrical interlocks to prevent backfeed
• Standards-compliant wiring/earthing and input separation
• Weekly load-bank tests with recorded results

Conclusion

With a well-designed AMF+ATS, outages become manageable events. The quality of this point sets the tone for the entire backup system.