When using a phase converter in combination with a backup generator, it’s crucial to implement a proper transition strategy to protect your equipment and ensure reliable operation. One of the most important steps in this setup is installing a delay timer that introduces a pause—typically between 20 to 30 seconds—before switching power sources between the utility grid and the generator.

This delay allows the generator to fully stabilize its output voltage and frequency before the phase converter begins operating. Without this buffer period, the phase converter may receive unstable or fluctuating power during the transition, which can trigger PLL (Phase-Locked Loop) faults. These faults occur when the converter’s internal electronics struggle to synchronize with the incoming power signal, potentially leading to erratic behavior or shutdowns.

Even more concerning, failing to use a delay timer can result in permanent damage to the phase converter’s sensitive components. Such damage is not covered under standard warranty terms, meaning you could face costly repairs or replacement expenses. This risk is especially high in systems where the generator starts automatically during power outages and immediately attempts to supply power to the converter without allowing time for voltage stabilization.

By incorporating a delay timer into your setup, you create a controlled environment that ensures the generator has time to reach its operating parameters before the phase converter engages. This simple addition can dramatically improve system reliability, extend the lifespan of your equipment, and prevent unnecessary downtime or financial loss.

In short, while it may seem like a minor detail, a delay timer is a critical safeguard when integrating a phase converter with a backup generator. It’s a small investment that pays off in long-term protection and peace of mind.

The generator should be rated for at least 1.5 – 2 times the current rating of the phase converter to properly run a load.