What is the name of relay we use to connect HV and LV?

Which technological advancement in HVDC systems allows for more flexible network integration and independent control of active and reactive power?*Thyristor-based systemsVoltage Source Converters (VSC)Line Commutated Converters (LCC)Electromechanical relays

Which HVDC link control technique is typically used for voltage regulation in an LCC system?*Direct control of AC system frequencyVarying the resistance in the DC circuitModulating the frequency of the DC linkAdjusting the transformer tap settings on the AC side

Which of the following is not an application for a relay? Multiple Choicechange alternating current to direct currentcontrol a 120-V lighting circuit with a 24- V control circuitcontrol several switching operations by a single separate currentswitch a high-current circuit ON and OFF with a low control circuit

What do you mean by LVM? Explain

Relay Logic / Instructions