How Isolation Transformer Works - Shakti Electronics

1. HOWISOLATIONTRANSFORMERWORK Voltage220V isnotsafeforhumans. Accidentalcontactwithalive wireorliveinstrumentcasecanbefatalifthepersonisstandingon the ground or on a grounded surface. Of particular danger are the mains current in wet rooms. An isolation transformer ensures the safeoperationoftheequipment.Itisusedtodecouplethegalvanic connection of the power supply with the mains voltage, which reducesthelikelihoodofelectricshocktozero. WhatisIsolationTransformer? In reality, a safety transformer or isolation transformer is referred to veryspecifictransformerwitha1:1ratio,i.e.,withthesamewindingin both coils (same number of turns), so as not to transform the servo voltagestabilizerandthus,theoutputandinputwillbeequal. IsolationTransformer:Varieties Inelectrical engineering,astep-downtransformerofferedbyastep downtransformermanufacturerinjaipurwithgalvanicseparationof the circuits of the primary winding and the secondary coil is often used. The power transformer family includes a series of single-phase transformerswithdifferentpowerratings.Industrialpowerunitsare usually of impressive size and are installed permanently in special boxes.

2. The use of portable transformers is convenient in cases where electricalequipmentcannotbeinstalledpermanentlybutisused periodically.Atratedprimaryvoltages,thesedevicesworkstably. They are well protected from moisture and other environmental influences. In input signal blocks, as well as in other circuits of electronic equipment,small-sized,high-frequencypulseboostertransformers are used. According to the design of the core, the network transformer is most often of the rod type. There are also toroidal models. IsolationTransformer:ConstructionAnd PrincipleOfAction The main difference between the isolation transformer is the absence of galvanic coupling between the coils, which are reliably separated by galvanic isolation. Usually, the winding forming the primarycircuitofthetransformerareidenticalinparameterstothe winding in the secondary circuits. In this case, the transformation ratio for this isolating transformer is 1.That is, the device is used exclusivelyforgalvanicisolation. A characteristic feature of transformers of this type is that the circuitsofthesecondarywindinginthedividingtransformationare not equipped with protective grounding. In order to ensure the reliabilityofgalvanicisolation,additionalinsulationisusedbetween the coils. In some cases, the turns of the primary windings are separated by a protective screen from the secondary winding, or they are physically separated into different parts of the magnetic circuit.

3. Otherwise,thedesignandprincipleofoperationdonotdifferfrom othertypesoftransformers: Voltageissuppliedtotheprimarywindingfromthenetwork; Theresultingmagneticinductionpropagatesthroughoutthe magneticcircuit. Theinductionemfexcitesan electriccurrentinthesecondary coilturns. There is a relationship between the voltages in the coils and the currents: the magnitudes of the secondary voltages are directly proportional to the primary voltages, with a proportionality factor k=W2/W1,andtheoutputcurrentisinverselyproportionaltothe currentintheprimarywinding. Duetotheabsenceofagalvanicconnectionbetweenthecoilsand the separation from the ground circuit of the primary winding, accidentalcontactwithanyterminalofthesecondarycoildoesnot lead to electric shock. It is only necessary to beware of touching differentterminalsofthetransformeratthesametime. Thus,incaseofelectricalcontactwiththecurrent-carryingpartsof equipmentpoweredby an isolationtransformer,anelectricalcircuit with the ground is not formed, which eliminates the possibility of electric shock. Isolating transformers also provide protection for connectedelectricalappliancesincaseofsingle-phasefaults. However,forcompleteprotection,connectanRCDtotheprimary circuit.

4. IsolationTransformer:Specifications The isolation transformer manufacturer supplies the market with manymodelswithdifferentcharacteristics.Forpracticalpurposes,it issufficienttoknowthebasicparametersofthetransformer. Usually,theseparametersarespecifiedinthedevicepassport. When choosing an isolating transformer, pay attention to the followingmaincharacteristics: Rated power; Currentfrequency; Primaryvoltage; Output(secondary)voltage; Symbolofthewindingconnectionscheme; Voltageinshortcircuitmode; Thermallossesduringshortcircuits; Currentinidlemode; Heatlossesduringidling; Dimensions. The rated power must match or slightly exceed the load power. The primary voltage must correspond to the parameters of the primary network, and the secondary voltage must correspond to the supply voltageoftheconnectedelectricalappliances.Whenchoosingpulse transformers,payattentiontothefrequencyofthecurrent. If you are looking for an isolation transformer at a good price, you haveseveraloptions,oneofthemostpopularofwhichistosearch foritontheShaktiTransformer. SOURCE:https://articles.abilogic.com/624318/how-isolation-transformer- work-shakti.html