Re: Re: Cutout relay on generator
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Posted by Chris on September 08, 1998 at 10:59:36:
In Reply to: Re: Cutout relay on generator posted by ks on September 07, 1998 at 18:48:50:
Concerning the 6 / 12 volt issue on a solid state cutout, I have never used a solid-state but would like to understand its operation. The idea that it would not have a preset voltage for operation violates the principle of how the old electromagnetic relays worked. The function of a cutout as described by Delco is to "closes (the contacts to the battery) when generator voltage is sufficient to charge the battery". "Sufficient" really means a 4-6 volt fixed range usually starting at about 6.2 but different for many cutout/generator combinations. Looking at the chart, they are designed such that there is an acceptable range of voltage (based on the windings with minor adjustment made by the position of the plate) matched to the specific model of generator and its charging characteristics. This explains the need for different cutouts to match different generators. Does a solid-state cutout work by monitoring relative voltage on both sides and somehow compare for a fixed relative difference? It certainly would not be able to operate on the same principle as an OEM cutout and still work at 6 or 12 nor provide the characteristic matching that DR originally provided with their product line of cutouts and generators. Please explain the theory of the solid state cutout. On 2-brush vs 3-brush. It must be a 3-brush or the shop really didnt know what they were doing. It is possible for a 2 brush to have a seperate cutout if the cutout in the VR (assuming there is a VR somewhere if it were a 2 brush) is fried but this would be a real hack and would not be the way a shop would handle it. The problem is that the cutout present in the VR would normally be shunted to the current or voltage relay (depending on design) and a standalone would not have this. This would cause the other relays to operate at the wrong voltage. I would guess that the shop wouldnt have sold a standalone cutout to go with a 2 brush generator. :Okay, let's get a couple of things straight before we begin. First, the modern solid state cutout replacements will work at any voltage-they are not 6 or 12 volt specific.
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