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electrical:12v:alternator_charging_hvd [2017/10/11 14:26] frater_secessus [how it works] |
electrical:12v:alternator_charging_hvd [2017/10/11 15:33] frater_secessus [solid state isolators] |
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Shutting down the device will require different approaches, depending on where it gets the power to operate itself. | Shutting down the device will require different approaches, depending on where it gets the power to operate itself. | ||
- | ===== disconnecting isolators | + | ===== solenoids |
+ | {{ https:// | ||
+ | Purely Mechanical devices like solenoids and relays use 12v //trigger// or //exciter// voltage((usually from the accessory circuit)) to operate. | ||
- | by 12v trigger. | + | Power to these devices is disrupted |
+ | **Note: | ||
- | ===== disconnecting | + | ===== voltage sensing relays ===== |
- | These usually | + | Voltage sensing relays (VSR) typically take power from the chassis battery and have a thin ground to complete the circuit. |
+ | Power to VSRs is disrupted by cutting the ground wire. One way to reestablish the ground (thereby turning the device on) is HVD --> relay NO contacts --> ground wire in/out | ||
+ | ===== solid state isolators ===== | ||
+ | Some solid state isolators have a trigger or exciter input; | ||
+ | |||
+ | Three lug isolators without exciter input might not be usable with HVD. |