03/01/2551 17:19 น. |
แล้ว high impedance ground คืออะไร ต่างกันตรงไหนครับ |
03/07/2551 18:55 น. |
Solidy Ground is a kind of grounding system which connects a neutral point of a system to ground directly with a conductor. It will be used with a low voltage system to make ebough fault current that CB can operate.<br><br>On the other hand, high impednace ground is designed to use in high voltage system to prevent too high fault current due to high voltage. A resistor (as wll as reactor sometimes) will be put in serie between a neutral point and ground. |