Guides techniques

Generator Backup System Selection ATS vs AMF panel is often explained too simply. An ATS is not just a switch that waits for two already-running power sources, and an AMF…

Generator Backup System Guide An automatic transfer switch (ATS) and a generator automatic voltage regulator (AVR) solve two different problems in a backup power system. The ATS determines which source…

An automatic transfer switch and a surge protective device solve two different problems. The ATS transfers a load between available power sources; an SPD limits transient overvoltage and diverts surge…

An automatic transfer switch and a UPS solve different parts of the same critical-power problem. The ATS selects between available power sources. The UPS keeps supported critical loads powered while…

A portable generator can supply a commercial load through suitable transfer equipment, but the correct transfer method depends on how the generator is deployed, started and connected to the electrical…

Selecting a standby generator ATS is not simply a matter of matching the generator kW rating. The transfer switch must match the actual load current, system voltage, phase arrangement, neutral…

A gas generator can work with an automatic transfer switch, but selecting the ATS is not simply a matter of choosing a “generator ATS.” For generator-set integrators, panel builders, contractors…

Diesel Generator ATS Selection Guide Choosing an ATS for a diesel generator is not simply a matter of matching generator kVA to an ampere rating. A reliable utility-to-generator system must…

Off-Grid & Backup Power ATS Guide An off-grid automatic transfer switch is used when one AC load must transfer automatically between two available AC power sources, such as an inverter…

A hybrid inverter system does not automatically need an external ATS. An automatic transfer switch can be useful when two AC sources—most commonly the utility grid and a generator—must be…