It is important in the design of Underground Cables that these should be provided with sufficient insulation. Select one: True False
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- A number of cables are tested for insulation resistance. The highest individual value is 400 M and the lowest is 40 MQ. The measured value, when the cables are all connected in parallel, will be..A3 The insulation cost for overhead lines is more when compared to underground cables. True/FalsePlease help me with my homework. Thanks! The course subject is Fundamentals of Electronic Communications. 4. A 400 W carrier is amplitude modulated to a depth of 100%. Calculate the total power in case of SSB technique. How much power saving (in W) is achieved for SSB compared to standard
- Discuss the following claimed arguments: 1- PVC insulating materials can sustain high temperatures in comparison with other insulating materials. 2- Suspension insulators are recommended in high voltage transmission lines.1 - Why make two wire, three wire or four wire connection in RTD connection?A) To be a backup connection lineB) To increase the magnetic fieldC) Because the resistance of the long connecting wires causes errorD) To increase the costE) For better coolingFill in the blank: Due to the electromegnatic isloation it is possible we can install the transmission line with the electrical conductive cables.
- Explain this and elaborateFor calculating the Thevenin's Equivalent Resistance(RIh) at load terminals, remove the load resistance and if a voltage soure by a short circuit and a current source is replaced by an open circuit source is present replaced by an open circuit A_ True B_FalseIn an outdoor substation the three bus-bar conductors are supported by units of post type insulators. Each unit consists of a stack of 3 pin type insulators fixed one on the top of the other. The voltage across the lowest insulator is 15kV and that across the next unit is 12kV. Estimate: i. ratio of mutual to self-capacitance ii. the bus-bar voltage of the substation. iii. Efficiency across the string of insulators
- determine "Vo" and "I", for the networks of figures (a) and (b)In a string of suspension insulator with three units, the line unit has 20kV and k=0.35. The voltage across tower unit is........ and across middle unit is.......Example 3.2 Using the transformer equivalent circuit found in Example 3.1, determine the line-to-neutral (120 V) and line-to-line (240 V) fault currents in three-wire single-phase 120/240 V secondaries shown in Figures 3.33 and 3.34, respectively. In the figures, R represents the resistance of service-drop cable per conductor. Usually R is much larger than X for such cable and therefore X may be neglected. Using the given dala, determine the following: a. Find the symmetrical rms fault currents in the HV and LV circuits for a 120 V fault if R of the service-drop cable is zero. b. Find the symmetrical rms fault currents in the HV and LV circuits for a 240 V fault if R of the service-drop cable is zero. c. If the transformer is a CSPB type, find the minimum allowable interrupting capacity (in sym- metrical rms amperes) for a circuit breaker connected to the transformer's LV terminals. 24.637 L 53.9 2 8.525 x 10 L 18.9 n H (x) ISHV 120 V 7200 V X2 120 V x3 H2 8.525 x 10-3 L 18.9° 0 R> R…