Fixed Cost

Fixed cost is defined as the cost which is independent of maximum demand and units generated. The fixed cost of electricity accounts for the annual cost of the central organization, interest on the capital cost of land, and salaries of officials. It is worth noting that the annual expenditure on the central organization and salaries … Read more

Running Cost of Electricity

The running cost of electricity depends only upon the number of units generated. The factors contributing to the running cost of electricity include the annual cost of fuel, lubricating oil, maintenance, repairs, and salaries of operating staff. Since the above-mentioned charges are contingent on the energy output, the running cost is directly proportional to the … Read more

Power System Protection MCQs Part 22

Power System Protection MCQs Part 22 Buchholz relays are used for transformers having ratings above Buchholz relays are used for transformers having ratings above: Correct answer: 3. 500 kV The condition which causes transient instability in power system The condition which causes transient instability in power system: Correct answer: 4. All of these The primary … Read more

The letters DPDT indicate

The letters DPDT indicate: Correct answer: 2. Switch Explanation: The abbreviation DPDT indicates Double Pole Double Throw switch. It consists of six terminals, two of which are independent input terminals. The vide below provides information on different types of switches: