Cov ntsiab cai ntawm kev siv tam sim no transformers
1) Kev xaim ntawm lub tshuab hluav taws xob tam sim no yuav tsum ua raws li lub hauv paus ntsiab lus ntawm kev sib txuas: uas yog, thawj winding yuav tsum tau txuas nrog lub voj voog nyob rau hauv kev sim, thiab qhov thib ob winding yuav tsum tau txuas nrog hauv series nrog tag nrho cov ntsuas ntsuas.
2) Xaiv qhov kev hloov pauv tsim nyog raws li qhov ntsuas tam sim no, txwv tsis pub qhov yuam kev yuav nce ntxiv. Nyob rau tib lub sijhawm, ib qho kawg ntawm qhov thib ob sab yuav tsum tau muab tso rau hauv av kom tsis txhob muaj qhov hluav taws xob siab ntawm thawj sab los ntawm kev nkag mus rau theem nrab qis voltage sab thaum lub rwb thaiv tsev puas, ua rau tus kheej thiab cov khoom raug mob.
3) The secondary side is absolutely not allowed to open circuit, because once the circuit is open, the primary side current I1 will all become magnetizing current, causing φm and E2 to increase sharply, resulting in excessive saturation magnetization of the iron core, serious heat generation and even burning of the coil; , which increases the error. When the current transformer is working normally, the secondary side is used in series with current coils such as measuring instruments and relays. The impedance of the current coils such as measuring instruments and relays is very small, and the secondary side is similar to a short circuit. The magnitude of the CT secondary current is determined by the primary current, and the magnetic potential generated by the secondary current balances the magnetic potential of the primary current. If the circuit is suddenly opened, the excitation electromotive force will suddenly change from a small value to a large value, and the magnetic flux in the iron core will present a severely saturated flat-top wave. Very high peak waves, whose value can reach thousands or even tens of thousands of volts, endanger the safety of workers and the insulation performance of the instrument.
Tsis tas li ntawd, qhov qhib qhov hluav taws xob ntawm qhov chaw nruab nrab ua rau qhov hluav taws xob ntawm qhov nruab nrab mus txog ntau pua volts, uas yuav ua rau muaj hluav taws xob poob siab yog tias kov. Yog li ntawd, ob sab ntawm lub transformer tam sim no yog nruab nrog luv luv - Circuit Court hloov los tiv thaiv sab ob ntawm qhov qhib. Nyob rau hauv tus txheej txheem ntawm kev siv, thaum lub thib ob sab yog qhib, lub Circuit Court load yuav tsum tau muab tshem tawm tam sim ntawd, thiab ces lub fais fab tuag yuav tsum tau ua tiav. Nws tuaj yeem rov siv dua tom qab txhua yam pov tseg.
4) Txhawm rau ua kom tau raws li qhov xav tau ntawm cov cuab yeej ntsuas, kev tiv thaiv kev tiv thaiv, kev txiav txim siab ntawm Circuit Court breaker tsis ua haujlwm thiab kev lim dej tsis raug, thiab lwm yam, tag nrho cov khoom siv hluav taws xob tau nruab rau hauv cov tshuab hluav taws xob, cov khoom siv hluav taws xob, cov kab hluav taws xob, cov kab hluav taws xob, cov kab hluav taws xob, cov tsheb thauj mus los Circuit Court breakers, tsheb npav Circuit Court breakers, bypass circuit breakers. thiab lwm yam circuits. 2 mus rau 8 tam sim no transformers nrog lwm yam windings.
5) Lub chaw teeb tsa ntawm lub tshuab hluav taws xob tiv thaiv tam sim no yuav tsum tau teeb tsa kom deb li deb tau kom tshem tawm qhov tsis yog - tiv thaiv cheeb tsam ntawm lub ntsiab tiv thaiv ntaus ntawv. Piv txwv li, yog tias muaj ob pawg ntawm cov transformers tam sim no, thiab qhov chaw tso cai, lawv yuav tsum tau nruab rau ntawm ob sab ntawm lub Circuit Court breaker, kom lub Circuit Court breaker yog nyob rau hauv lub Scope ntawm kev tiv thaiv hla.
6) Txhawm rau tiv thaiv qhov ua txhaum ntawm busbar tshwm sim los ntawm bushing flashover ntawm tus ncej - hom tam sim no transformer, tam sim no transformer feem ntau yog teem rau ntawm kab tawm los yog transformer sab ntawm lub Circuit Court breaker.
7) Txhawm rau txo qhov kev puas tsuaj los ntawm kev ua txhaum sab hauv ntawm lub tshuab hluav taws xob, lub tshuab hluav taws xob tam sim no siv rau kev hloov kho tsis siv neeg ntawm cov cuab yeej excitation yuav tsum tau teem caij rau sab nraud ntawm lub tshuab hluav taws xob stator winding. Txhawm rau pab txhawb kev tsom xam thiab nrhiav kev ua txhaum sab hauv ua ntej lub tshuab hluav taws xob tau muab tso rau hauv qhov system, tam sim no transformer siv rau kev ntsuas ntsuas yuav tsum tau nruab rau sab nruab nrab ntawm lub tshuab hluav taws xob.
