Switched Neutral Transfer Switch

Which method is best for switching the neutral.

Switched neutral transfer switch.

Using a 3 pole transfer switch next consider adding a 3 pole ats and a generator to the aforementioned simple circuit see figure 3. The subpanel will still be grounded from the unswitched ground wire from the main panel. You want to preserve the integrity of your ground fault protection system without compromise so what do you do when it comes to switching the neutral. A generac switch neutral works with the manual transfer switch to allow you to safely switch from utility to portable generator power in emergencies and power critical.

How to avoid tripping a bonded neutral generator. If you cannot lift the bond disconnect the ground wire to the transfer switch at the generator or don t run a ground wire at all. The answer may surprise you. The new reliance panel link x series is a double pole manual transfer switch with an exclusive third pole for the neutral that switches sequentially.

The generac 6297 30 amp switch neutral kit for manual transfer switches is designed to enable manual transfer switches up to 30 amp to isolate the utility and generator neutrals. This paper describes the function of switched neutral contacts. We explain the safest solution. Also the neutral is designed to be switched simultaneously with the switching of the load.

But your question is going to over 20 000 electrical professionals and i m sure we ll get lots of positive feedback. With a switched neutral the generator set can be wired as a separately derived system to the load and normal power supply. The experts at electric generators direct explain how to keep your generator from tripping a breaker when plugged into a transfer switch. 3 pole transfer switches with overlapping neutral contacts or 4 pole switches.

But i have not written any articles on when a separately derived system generator supplying a switched neutral transfer switch is required or preferred. Don t disconnect a bonded neutral generator because it s dangerous and isn t recommended by the manufacturer or osha regulators. Switching the neutral conductor a primer on solid and switched neutral transfer switches automatic transfer switches atss are available with and without a dedicated pole to switch the neutral conductor of load circuits between normal and emergency power sources. In this configuration the neutral is not solidly connected through the transfer switch but switched.

Note that neither neutral nor ground are switched in the transfer switch. There is no neutral to ground link at the generator. Because there is now a 3 pole ats in this system the neutral is continuous and the generator is not considered to be a separately derived source. The sequentially switched neutral means you can switch between a portable generator and utility power without the danger of sending 240v current to a 120v circuit.