OLTC (Basic knowledge)
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Questions and Answers

What are the main components of the on-load tap-changer?

  • Selector switch, diverter switch, and regulating winding
  • Tap changer head, oil compartment, tap changer insert (correct)
  • Transformer core, bushings, and cooling system
  • Buchholz relay, conservator tank, and pressure relief device
  • What is the purpose of the diverter switch in the on-load tap-changer?

  • To redirect the flow of current to different tap positions (correct)
  • To control the circuit breaker operation
  • To provide cooling to the transformer core
  • To regulate the output voltage
  • Match the following components with their functions in the on-load tap-changer:

    Selector Switch = Selects the tap position Tap Changer Controller = Controls the tap-changing process Motor Drive = Drives the tap-changing mechanism Transition Reactor = Reduces transient voltage during tap changing

    Match the following components with their roles in the on-load tap-changer:

    <p>Winding Selector = Selects the winding for tap-changing Voltage Regulator = Regulates the output voltage Bypass Switch = Bypasses the tap changer for maintenance Diverter Switch = Redirects the load current during tap changing</p> Signup and view all the answers

    Match the following components with their functions in the on-load tap-changer:

    <p>Tap Position Indicator = Indicates the current tap position Control Cubicle = Houses the tap changer control equipment Oil Tank = Contains the insulating and cooling oil Buchholz Relay = Protects the transformer from internal faults</p> Signup and view all the answers

    What are the main components of the on-load tap-changer?

    <p>Selector switch, diverter switch, and tap-changing resistor</p> Signup and view all the answers

    Which component is responsible for diverting the current from one tap to another in the on-load tap-changer?

    <p>Diverter switch</p> Signup and view all the answers

    What is the function of the tap-changing resistor in the on-load tap-changer?

    <p>To limit the inrush current during tap changing</p> Signup and view all the answers

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