We build transfer switches, and nothing else

A critical facility is built around two independent sources of power. Much of the equipment inside it has one power cord. We make the device that closes that gap: a switch that sits at the load, watches both sources and moves the load between them faster than the equipment can notice.

We build it in both technologies. Our static transfer switches use SCRs and transfer as fast as a quarter cycle. Our DCC-I automatic transfer switch uses patented MagLatch latching relays and transfers in under half a cycle. Both do it without any risk of dropping the load or cross-connecting the sources. 70 million hours online is more than 7,900 unit-years of service without a load failure.

We are engineers, and we would rather you test than take our word for it. Scope the output during a transfer. Ask for the out-of-phase number. Ask where the fuses are. We publish what we know about choosing, sizing and installing transfer switches, including when a relay switch is the right answer and a static switch is not, and we will send you a comparison chart with our column filled in so you can complete the others from your own tests.

When you call, you reach people who design the product. Send a one-line diagram and we will tell you where a switch belongs, which one, and what to feed it from.