Lêkolîna neyên nayê destnîşan kirin da ku bê navbera lêkolîna sartkirina vêrên yên di rêjeya bihêvî yên dîmenda û zeminê de reya parzûnkirina bide?

Dişî (an jî teybetandî) sisteman de dana bingehan û zeminê dihewce ye ku bingehan capacitance yên di navbera xeta hewalên bingehan û zeminê. Ev pîkard eku çûnek ji bo electric field ê navbera xeta hewalên bingehan û cihaneke wekhev, ku bi rêza charge an distribution neyên e, ku "earth capacitance" yekê ye.

Merga Vegerina Diwanê nivîsandin

1. Earth Capacitance: Her hilka bingehan ya ek din capacitance ê ya zeminî heye navbera zemin. In capacitances da navbera hilka û zemin û da navbera hilakan din. Jî bêtirî vebijarka taybetî electric, currents capacitance dihewce ye ji bo electric field.

2. Capacitive Current Flow: Di sistemê disî de, ger fault single-phase-to-ground bikin, current nehatiye ji bo source vegeha bi zemin, weseke di sistemê grounded de. Yene hatiye ji bo mutual inductance û capacitance navbera lines, transformer winding capacitance, û parametreyên din distribût, ku circuit complete bikin. Ev process mainly li capacitances navbera hilkan three-phase û navbera hilkan û zemin re bide loop current complete.

3. System Behavior: Di sistemê disî de, ger fault single-phase-to-ground bikin, current fault typically very small ye ji bo lack effective low-impedance grounding path. Current primarily displacement current ye ji bo capacitances mêzad. Ev faults less noticeable initially bike, lê over time could lead to further insulation degradation û potentially more severe faults if left unresolved.

4. Protection Measures: Ji bo detect such faults, specialized monitoring equipment, sija ground fault indicators û highly sensitive relay protection devices, often installed ne ji bo identify û locate the fault. Additionally, some designs may use a neutral point grounded through an arc suppression coil to limit the fault current during a single-phase-to-ground fault.

In summary, di sistemê disî de, return path that allows capacitive coupling navbera hilkan bingehan û zemin ê current flow maintain bikin, primarily achieved through capacitances navbera hilkan û navbera hilkan û zemin. While this design can reduce certain types of short-circuit currents, it also requires careful monitoring for potential ground faults to ensure timely intervention.