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techtalk:ih:elec02 [2018/12/16 17:37] hippysmack [Generator] |
techtalk:ih:elec02 [2020/02/08 04:31] hippysmack [IH: Electrical System] |
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| ====== IH: Electrical System ====== | ====== IH: Electrical System ====== | ||
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| + | ====== FUSES, RELAYS, CHARGING SYSTEM ====== | ||
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| + | Be sure to review the basic [[techtalk:ref:elec01|Electrical Concepts]] in the Reference Section, especially wire gauging. | ||
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| + | The Circuit Breakers (CB) used on Sportsters are of the self-resetting type. Once they break contact, they will automatically reset after a period of time. These breakers function based on a bi-metallic strip that is heated by current flowing through the strip. More current will cause more heat. | ||
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| + | If the rated amperage for the CB is exceeded, the strip will be overheated, causing it to bend away from the internal contact, thereby opening the circuit and removing the current flow. Once the bi-metallic strip has cooled sufficiently, it will return from its heated position and once again make contact. This will allow the current to begin flowing again. If the circuit is still drawing excessive current, the CB will repeat the open & close cycling until the current level is reduced below the current rating and no longer causing the bi-metallic strip to overheat. | ||
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| + | Although very reliable, over time & usage, the CB may no longer function at the rated current, requiring replacement of the Circuit Breaker. | ||
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| + | The following quotation makes the point that fuses are often slow to react to overcurrent situations. It is critical to replace rated fuses with the same rating in order to properly protect the circuits.\\ | ||
| + | <blockquote>First, fuse ratings can be a bit misleading. A 10A ATO (automotive) fuse will conduct 11 amps for 100 hours minimum. At 13.5 Amps a 10A ATO fuse can take as long as 10 minutes to blow. It is not like once you draw 10 amps "poof" the fuse is gone. (From FUSE SIZING PRIMER located at http://www.powerlet.com/learningCenter/fuseSizing)</blockquote> | ||
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