Quid significat Floating Neutral? Effectus & Quomodo Testari & Reparari Possit

    Phasellus, neutralis, et terra sunt tres conexiones quae systema electricum componunt. Ut energia electrica per onus secure fluat, omnis fili conexus est importantis.

In simplicibus verbis,

• Fili phasellus ad portandum principalem oneris currentem pro onere utitur

• Fili neutralis ad portandum extremo parvum vel etiam neglegibilem return currentem ad fontem, et

• Fili terrae ad portandum defluxionem currentem ad terram utitur.

Specificiter, problematis typicus cum fili neutralis existit et, si non corrigatur, cito circuitum electricum turbabit. Problematis est neutralis fluitans.

Quid est Neutralis Fluitans?

Neutralis Fluitans

Voltage phasellus non permanebit constans in singulis phasellos si punctum stellae oneris iniqui non coniungitur cum puncto stellae fontis (generatore vel distributore transformatoris), sed consequenter variabit.

Dicitur neutralis fluitans quia potentia puncti stellae (vel) puncti neutralis qui sic isolatus est semper variat et non fixa est.

Fili neutralis circuitus a terra separatur sub conditione quae dicitur neutralis fluitans. Fili neutralis in systemate AC semper ad terram terrestris coniungitur. Tamen,

• Conexio laxa,

• Fractura fili neutralis,

• Mala conexio circuiti, vel

• Circuitus brevis

posse causare neutralis fluitans in systemate potestiae.

Quid est Neutralis & cur ad terram coniungitur?

Differentia phasellus in systemate alternantis trinis phasellos est 120° pro omnibus phasellos. Punctum centrale vel commune praebetur in Delta-Star Transformatore ex quo idem differentia potentialis cum angulo phase shift 120° obtinetur pro omnibus tribus winding R, Y, et B Phasellus.

Voltage puncti neutralis est 0 sub conditione aequilibri. Si angulus phasellus alteravit propter onus iniquum vel conditionem defectus, generatur voltage (vel) currentis iniqua in fili neutralis.

Fili neutralis cuiusque start winding transformer securiter ad terram coniungitur ad protegendum systema. Si est iniquitas vel phasellus ad terram in fine oneris, currentis iniqua (vel) defectus currentis per circulum clausum ad terram fluet.

Relay protectionis operatur agnoscendo currentem neutralis et isolando onus.

Effectus Neutralis Fluitantis

Neutralis fluitans est extremo noxius in systemate alternantis (AC). Usuarii possunt notare sequentes perturbationes:

Voltage iniqua posse oriri in puncto neutrali, affectans stabilitatem systematis et equipmenti connecti.

Propter defectum terrae iniqua (vel) currentis defectus, relay non posse eam detegere, et systema protectionis coniunctum non operabitur.

Varii factores causantes Neutralis Fluitans

Numerosi elementa identificantur ut radices neutralis fluitantis. Effectus neutralis fluitantis dependet quando neutralis frangitur.

1) Distributio transformatoris trinis phasellos

 Plures defectus neutralis transformatoris causa sunt bushing neutralis defectus.

Determinatum est primarium causam fracturae conductoris neutralis in bushing transformatoris esse applicationem line tap. Vibratio et differentiae temperaturarum faciunt nutem in line tap solvere tempore, resultante nexu calido. Conductor coepit liquefaci, frangens neutralis.

Una ex causis defectus neutralis est mala installatio et opus technicorum.

Dependens a modo quo systematis onus aequilibratum est, neutralis fractus in transformatore trinis phasellos permittebit voltage fluctuare usque ad voltage line. Talis neutralis fluitans posset danificare equipmentum clientis quod connectum est ad supply.

Sub normalibus conditionibus, currentis normaliter fluunt a Phasellus ad Onus ad Onus ad redire ad fontem (transformatoris distributionis). Voltage line ad line inter onera creantur quando neutralis frangitur quia currentis ab rubro phasello transmutat ad caeruleum vel flavum phasellus.

Dependens a cliente, possent experiri voltage parvum vel overvoltage.

2) Fractus fili neutralis in linea LV

Resultatum fracti overhead The LV overhead distributionis conductoris neutralis erit similis fracto in transformatore.

Potius quam uti voltage phasellus, voltage supply fluctuat usque ad voltage line. Dependens a conditione problematis, equipmentum clientis connectum posset danificari.

3) Service Neutralis Conductor fractus 

Neutralis fractus service conductoris tantum causabit reductionem supply in puncto consumptoris. Non fuerunt damna ad equipmentum clientis.

4) Distributio Transformatoris cum Alta Resistance Earthing Neutralis

Bona earthing resistance neutralis pit praebet viam resistendi parvam pro currente neutralis ad effluere in terram. Alta earthing resistance potest praebere viam cum alta resistendo pro grounding neutralis in transformatore distributionis.

Limitans earth resistance satis parva ut praebat sufficientem currentem defectus pro immediate utilisatione dispositivorum protectionis et ad praeveniendum neutralis mutandi.

5) Overloading et Iniqua Onera

Una ex frequentissimis causis defectus neutralis est overloading combinata cum distributione iniqua oneris.

Neutralis debet apte stabiliri ut permittat fluxum minimi currentis per conductorem neutralis. Cancellatio causata a 120° phase shift currentis phasellus theoricè resultaret in nulli currentis fluxu in neutrali.

IR<0 + IY + 120 + IB – 120 = IN

Multus currentis fluunt in neutrali in rete overloading, iniqua, frangendo neutralis in puncto infirmo.

6). Neutrales Communales

Unus neutralis communalis duobus (vel) trium phasellos in aliquibus aedificiorum wiring. Originalis planus erat imitari wiring quattuor fili (trium phasellos & unum neutralis) panel boards ad niveli branch circuit. Solummodo currentis iniqua debet theoricè reverti ad neutralis. Itaque, unus neutralis potest complecti opus pro omnibus tribus phasellos. Cum augmento single-phase non-linear oneris, haec wiring circumventio cito finita est. Currentis zero-sequenti est problema.

Statistically addendo ab oneribus non-linearis, praesertim tertium harmonicum, revertetur in neutralis. Additicius currentis neutralis elevat voltage de neutralis ad terram, quod posset periculosum esse quia posset causare undersized neutralis ad overheating. Line to neutral voltage quod disponitur ad onus reducitur per hanc neutralis ad terram voltage.

7). Mala maintenance et opifex

Staff maintenance minimam attentionem solet adhibere ad rete LV. Continuitas neutralis erit impacta a laxitate vel insufficiencia tightness fili neutralis, quod posset resultare in neutralis fluitans.

Quomodo testari potest Neutralis Fluitans?

Neutralis semper ad terram coniungitur, sub normalibus conditionibus, voltage in puncto neutralis ad terram semper debet esse zero. Si conditio neutralis fluitantis continuat, debet esse quaedam voltage iniquitas in puncto neutralis ad terram. Systema potest testari mensurando voltage inter neutralis & ground.

Quomodo corrigere Neutralis Fluitans?

1). Uti interruptoribus quatuor polos, ELCB, vel RCBO in panel distributionis

Neutralis fluitans est periculosus.

Consider having a breaker panel with the 3 Pole Breaker for 3 Phase &bus bars for neutral for 3 phase inputs and a neutral. Phase-to-phase voltage is 440V, and neutral-phase voltage is 230V. When feed 230V loads using single breakers. 230V loads have the one line fed by the breaker & a neutral.

And when the neutral gets loose, corroded, or disconnected in panel. However, 230V loads may be in trouble. This floating neutral condition will cause one line to go from 230V to 340V or 350V and the other to go down to 110V or 120V.

Overvoltage will damage half of the 230V equipment, while low voltage will damage the other half. Thus, avoid floating neutrals. In a 3ph supply system, ELCB, RCBO, (or) 4 pole circuit breakers will trip the entire supply if neutral opens.

2). Stabilizator Voltage

Propter neutralis fluitans, onera trinis phasellos connectent inter phasellos quando neutralis defectus. Depending on the load resistance between these phases, the voltage ranges from 230V to 400V.Protect equipment with a servo stabilizer with a wide input voltage range and high/low cutoff.

3). Standard workmanship and Maintenance

Maintaining the LV network should be given more priority. Apply sufficient torque to tighten the neutral conductor in the LV system.

Conclusion

A Floating Neutral fault condition is extremely hazardous because if an appliance isn’t operating, someone who is unaware of the neutral floating may easily touch the neutral wire to figure out why the appliance isn’t working when it’s plugged into the circuit and receive an electric shock. Single-phase appliances are made to operate at their usual Phase Voltage; if they are exposed to Line Voltage, they may become damaged.

Floating neutral fault is an extremely hazardous problem that needs to be fixed as soon as is practical by identifying electrical wires to check & then connect properly.

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