Recently, India and Benin signed MoUs on education, health and ____

A 3-phase motor load has a p.f. of 0.397 lagging. The two wattmeter method used to measure power show the input as 30 kW. Find the reading on each wattmeter.

Here,
Cosφ = 0.397
P = 30 kW = √3*V_L*I_L*cosφ
V_L*I_L = 30kW/(√3*0.397) = 43628.48 VA

Readings of wattmeter W1 = V_L*I_L*cos(30+φ)

Readings of wattmeter W2 = V_L*I_L*cos(30-φ)

Find the word which is correctly spelt from the given options.

A THHN conductor will have a 60˚C termination on one end and a 75˚C termination on the other, which ampacity column will be used?

Conductor with higher temperature ratings, provide the ampacity is determined based on the 60°C ampacity of the conductor.

Which one of the following statement with respect to Aerial Bunched Cables (ABC) system is TRUE?

Aerial bundled cables/conductors are overhead power lines using several insulated phase conductors bundled tightly together, usually with a bare neutral conductor.
This contrasts with the traditional practice of using uninsulated conductors separated by air gaps.
This variation of bundled conductors utilizes the same principles as overhead power lines, except that they are closer together to the point of touching but each conductor is surrounded by an insulating layer

A power factor less than unity results in which of the following disadvantages?
(i) Large kVA rating of equipment
(ii)Poor voltage regulation
(iii) Greater conductor size

The load current is inversely proportional to the power factor, if power is constant
Lower the power factor, higher is the load current.
kVA rating of the equipment is inversely proportional to power factor.
The smaller the power factor, the larger is the kVA rating.
Therefore, at low power factor, the kVA rating of the equipment has to be made more, making the equipment larger and expensive.
To transmit or distribute a fixed amount of power at constant voltage, the conductor will have to carry more current at low power factor. This necessitates large conductor size.
The large current at low lagging power factor causes greater voltage drops in alternators, transformers, transmission lines and distributors. This results in the decreased voltage available at the supply end.