Guides techniques

When a compact automatic transfer switch is used in a generator backup or dual-source system, a project may also ask for utility status, generator status, transfer position or alarms to…

A compact automatic transfer switch is designed to transfer a load between two power sources. But if that ATS itself needs inspection, repair or replacement, it may become part of…

Mechanical and electrical interlocking protect different parts of an automatic transfer switch transfer sequence. In a conventional open-transition ATS, the objective is to disconnect one source before connecting the other…

Choosing between a 2P, 3P and 4P automatic transfer switch starts with one practical question: which current-carrying conductors must transfer when the ATS changes from one source to the other?…

An ATS short-circuit rating cannot be judged from the switch ampere rating alone. This matters especially for compact automatic transfer switches used in distribution boards, generator backup systems and OEM…

Generator ATS Commissioning Guide Automatic transfer switch (ATS) time delay settings affect when a utility problem becomes a real transfer event, when a generator-start sequence begins, when the load can…

For a three-phase automatic transfer switch, choosing the pole configuration is not only a mechanical decision. The real engineering question is whether the load neutral should remain continuously connected or…

PC Class vs CB Class ATS is mainly a question of short-circuit protection architecture. Both can transfer a load between two power sources, but they assign fault interruption differently. For…

Choosing between a contactor type ATS and a switch type ATS is not simply a question of which design is faster, carries more current, or costs less. Both architectures are…

B2B Power Switching Selection Guide An automatic transfer switch (ATS), a changeover switch, and an isolator may all appear in low-voltage panels, but they do not solve the same engineering…