TECHNOLOGY SUPPLY

                                                      Q: What is inrush current? A :Inrush current is the current drawn by a piece of electrically operated equipment when power is first applied. It can occur with AC or DC powered equipment, and can happen even with low supply voltages. Q: In a Tap changing transformer where is the tap connected, is it connected in the primary side or secondary side? A :Tapings are connected to high voltage winding side, because of low current. If we connect tapings to low voltage side, sparks will produce while tap changing operation due to high current. Q :Why transformer ratings are in kva? A : Since the power factor of transformer is dependent on load we only define VA rating and does not include power factor .In case of motors, power factor depend on construction and hence rating of motors is in KWatts and include power factor. Q : What is difference between fuse and breaker? A : Fuses are burned at the time of over current flows in the circuit but

Satellite Navigation-Global Positioning System Satellite Navigation is based on a global network of satellites that transmit radio signals from medium earth orbit. Users of Satellite Navigation are most familiar with the 24 Global Positioning System (GPS) satellites. The United States, which developed and operates GPS, and Russia, which developed a similar system known as GLONASS, have offered free use of their respective systems to the international community. The International Civil Aviation Organization (ICAO), as well as other international user groups, has accepted GPS and GLONASS as the core for an international civil satellite navigation capability known as the Global Navigation Satellite System (GNSS). The basic GPS service provides users with approximately 100-foot accuracy, 95% of the time, anywhere on or near the surface of the earth. To accomplish this, each of the 24 satellites emits signals to receivers that determine their location by computing the difference between the