Answer / madhu

Chopper is a device used to convert the fixed DC Voltage to
Variable DC voltage. DBR (Dynami brake resistor) used with
VFD to eliminate regenerative braking. Chopper is used with
DBR to sense the DC bus voltage of VFD. If the DC bus
voltage increases during Regenerative braking DBR will
operate.

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how can LED bulb indication work correctly without CT OR PT for 3 phase indication if one is cut then it will show the correct indication?

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Explain about fire hydrant and its related water pressures?

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about generator

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Let’s say we live in a country that gets very cold, in Northern America / Europe. In winter, we monitor the ouside temperature, so that heaters can be switched on, inside the house. The idea is that, the colder it is outside, the warmer it should be inside. The heating side of things is just a heater that is either switched on, or switched off. Just from the information that has been given, please discuss this matter in depth. Provide reference to OPEN / CLOSED loop control, FEEDFORWARD / FEEDBACK control and MODULATING / ON_OFF control raised in the discussion.

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What’s the normal transformer current rating?

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4 Answers   Sabic,

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