A Solid State Replacement for the 62 set dynamotor
... set to switch at about 50Hz by judicious choice of base RC values. The output voltage of this is used to switch on and off alternately a pair of TIP3055s. These alternately earth either end of the two 9v windings connected as a 9V-0-9V primary, with the +12V supply applied to the centre. (It is impo ...
... set to switch at about 50Hz by judicious choice of base RC values. The output voltage of this is used to switch on and off alternately a pair of TIP3055s. These alternately earth either end of the two 9v windings connected as a 9V-0-9V primary, with the +12V supply applied to the centre. (It is impo ...
Electronics (2001)
... • If the user is a small one, a house for example, the supply cable will have two conductors, live and neutral. The supply voltage is usually 240/120 V, and such configuration is known as single-phase two-wire system. • The single-phase supply is the most common supply for domestic premises and othe ...
... • If the user is a small one, a house for example, the supply cable will have two conductors, live and neutral. The supply voltage is usually 240/120 V, and such configuration is known as single-phase two-wire system. • The single-phase supply is the most common supply for domestic premises and othe ...
No Slide Title - Electrical and Computer Engineering
... – John Zipp – John Larson – Rich Cottrell ...
... – John Zipp – John Larson – Rich Cottrell ...
120 Volt house wiring
... Only to be used where there is no grounding system NEC allows GFCI in place of nongrounding 110 V current ...
... Only to be used where there is no grounding system NEC allows GFCI in place of nongrounding 110 V current ...
Coaxial Surge Protection Device
... SP001P-AC110 AC Power Surge protection Device Terminal Connector Terminal connector to terminal connector. ...
... SP001P-AC110 AC Power Surge protection Device Terminal Connector Terminal connector to terminal connector. ...
Current in a transformer
... Three Devices Used to Control Filament Current 3) High Frequency Control – The use of high frequency generators (transformers) to control output. - Contains microprocessor feedback circuit for better control of kVp and mA ...
... Three Devices Used to Control Filament Current 3) High Frequency Control – The use of high frequency generators (transformers) to control output. - Contains microprocessor feedback circuit for better control of kVp and mA ...
INTRODUCTION Power system harmonic
... concepts must be taken into consideration for harmonics studies: 1. the nature of non-linear loads. 2. the interaction of harmonic currents and voltages within the power system. • Here we will take a study case for corporate center in Las Vegas that uses over 1000 computers. These are powered from f ...
... concepts must be taken into consideration for harmonics studies: 1. the nature of non-linear loads. 2. the interaction of harmonic currents and voltages within the power system. • Here we will take a study case for corporate center in Las Vegas that uses over 1000 computers. These are powered from f ...
Major causes of transient overvoltages
... Limit the cable length Add load if possible Change switching strategy – switch at transformer terminals instead of at cable source side • Use YY grounded transformers supplied from cables – long cable runs may need three single-phase transformer in YY grounded bank ...
... Limit the cable length Add load if possible Change switching strategy – switch at transformer terminals instead of at cable source side • Use YY grounded transformers supplied from cables – long cable runs may need three single-phase transformer in YY grounded bank ...
Solution of Exercise 20 (Electric Circuits)
... earth since there is no resistance in the conducting path to the earth. If there were no earth wire, the metal body would become high potential and anyone who happened to touch it could receive a fatal electric shock. (b) (i) Live (ii) Current drawn from each kettle = P/V = 1500 / 200 = 7.5 A maximu ...
... earth since there is no resistance in the conducting path to the earth. If there were no earth wire, the metal body would become high potential and anyone who happened to touch it could receive a fatal electric shock. (b) (i) Live (ii) Current drawn from each kettle = P/V = 1500 / 200 = 7.5 A maximu ...
Technical Approach
... •Must be able to withstand small to medium amounts of mechanical stress and prevent catastrophic failure if a student connects the terminals backwards or shorts the supply out ...
... •Must be able to withstand small to medium amounts of mechanical stress and prevent catastrophic failure if a student connects the terminals backwards or shorts the supply out ...
Electricity Merit Badge
... • GFCIs are used to prevent shock to someone. They sense an abnormal difference in current from the hot and neutral wires in household circuits. • They are designed to interrupt the circuit by detecting a few milliamps of current compared to over 15 to 20 amps needed to trip a circuit breaker. • Req ...
... • GFCIs are used to prevent shock to someone. They sense an abnormal difference in current from the hot and neutral wires in household circuits. • They are designed to interrupt the circuit by detecting a few milliamps of current compared to over 15 to 20 amps needed to trip a circuit breaker. • Req ...
CIRCUITS AND SAFETY
... person touched that point, while their feet were touching the ground a large voltage would be across their body, driving a large current and shocking them. • GROUNDING is to electrically attach a circuit to the lowest "electrical potential" ...mostly referred to as 0 Volt (zero) potential. If a circ ...
... person touched that point, while their feet were touching the ground a large voltage would be across their body, driving a large current and shocking them. • GROUNDING is to electrically attach a circuit to the lowest "electrical potential" ...mostly referred to as 0 Volt (zero) potential. If a circ ...
Smart Materials: The light bulb
... classroom by coiling a metal wire and powering with a controllable AC power supply. Place the coiled wire (coil size can vary, but ¼ inch coils works great) held by lab supports as shown in the figure. The metal used should withstand high enough temperatures so that a bright light can be seen at hig ...
... classroom by coiling a metal wire and powering with a controllable AC power supply. Place the coiled wire (coil size can vary, but ¼ inch coils works great) held by lab supports as shown in the figure. The metal used should withstand high enough temperatures so that a bright light can be seen at hig ...
Generators and Transformers
... The good news is you are going on a trip to France. The bad news is that in France the outlets have 240 volts. You remember from Phy1152 that you need a transformer, so you wrap 100 turns around the primary. How many turns should you wrap around the secondary if you need 120 volts iron out to run yo ...
... The good news is you are going on a trip to France. The bad news is that in France the outlets have 240 volts. You remember from Phy1152 that you need a transformer, so you wrap 100 turns around the primary. How many turns should you wrap around the secondary if you need 120 volts iron out to run yo ...
Transmission of Electrical Energy
... Electrical energy is carries by conductors such as overhead transmission lines and underground cables. The conductors are usually aluminum cable steel reinforced (ACSR), with steel core and aluminum conductors wrapped around the core. In addition to phase conductors, a transmission line include one ...
... Electrical energy is carries by conductors such as overhead transmission lines and underground cables. The conductors are usually aluminum cable steel reinforced (ACSR), with steel core and aluminum conductors wrapped around the core. In addition to phase conductors, a transmission line include one ...
Download the Quiz
... Which of the following is good practice for lightning protection grounds? A. They must be bonded to all buried water and gas lines B. Bends in ground wires must be made as close as possible to a right angle C. Lightning grounds must be connected to all ungrounded wiring D. They must be bonded togeth ...
... Which of the following is good practice for lightning protection grounds? A. They must be bonded to all buried water and gas lines B. Bends in ground wires must be made as close as possible to a right angle C. Lightning grounds must be connected to all ungrounded wiring D. They must be bonded togeth ...
Earth Leakage Circuit Breaker (ELCB)
... ELCB sense coil with enough voltage to cause it to trip). If the installation’s earth rod is placed close to the earth rod of a neighboring building, a high earth leakage current in the other building can raise the local ground potential and cause a voltage difference across the two earths, again ...
... ELCB sense coil with enough voltage to cause it to trip). If the installation’s earth rod is placed close to the earth rod of a neighboring building, a high earth leakage current in the other building can raise the local ground potential and cause a voltage difference across the two earths, again ...
Isolation Transformer
... High Voltage DC Isolation Transformers High Voltage DC Isolation Transformers are used to provide AC power to circuits that are operated at a DC voltage for either polarity above ground potential. All units are conservatively designed for continuous operation with high reliability. Low internal lo ...
... High Voltage DC Isolation Transformers High Voltage DC Isolation Transformers are used to provide AC power to circuits that are operated at a DC voltage for either polarity above ground potential. All units are conservatively designed for continuous operation with high reliability. Low internal lo ...
UFC SERIES PwrKartTM 400 Hz AND 270 VDC
... Since its beginning in 1960, Unitron has specialized in the design and development of reliable, solid-state power systems. Through an innovative design, Built-In Test Equipment (BITE) and modular construction, Unitron products assure maximum power availability and minimal repair time for the latest ...
... Since its beginning in 1960, Unitron has specialized in the design and development of reliable, solid-state power systems. Through an innovative design, Built-In Test Equipment (BITE) and modular construction, Unitron products assure maximum power availability and minimal repair time for the latest ...
Bus-bars of Substations Bus-bars
... substation and are not used for voltages exceeding 33 kV • They have initial low cost, less maintenance, and simple operation • If repair has to be done the power supply is interrupted ...
... substation and are not used for voltages exceeding 33 kV • They have initial low cost, less maintenance, and simple operation • If repair has to be done the power supply is interrupted ...
Minera E
... and relevant IEE and EN/VDE standards. Any special customer standards or requirements, such as limiting dimensions, fittings and paint systems, are available on request. ...
... and relevant IEE and EN/VDE standards. Any special customer standards or requirements, such as limiting dimensions, fittings and paint systems, are available on request. ...
UFC Low ProFileTM SERIES 400 Hz AND 28 VDC
... Since its beginning in 1960, Unitron has specialized in the design and development of reliable solid-state power systems. Through an innovative design, advanced self-diagnostic systems (BITE) and modular construction, Unitron products assure maximum power availability and minimal repair time. The Lo ...
... Since its beginning in 1960, Unitron has specialized in the design and development of reliable solid-state power systems. Through an innovative design, advanced self-diagnostic systems (BITE) and modular construction, Unitron products assure maximum power availability and minimal repair time. The Lo ...
Science949key - Rocky View Schools
... electric generators in power stations. 3. What do transformers do? Explain the difference between the 'step up' transformers and the 'step down' types of transformers. Step up transformers increase the voltage for efficient transmission over long distances. Step down transformers decrease voltage fo ...
... electric generators in power stations. 3. What do transformers do? Explain the difference between the 'step up' transformers and the 'step down' types of transformers. Step up transformers increase the voltage for efficient transmission over long distances. Step down transformers decrease voltage fo ...
Single-wire earth return
Single wire earth return (SWER) or single wire ground return is a single-wire transmission line which supplies single-phase electrical power from an electrical grid to remote areas at low cost. Its distinguishing feature is that the earth (or sometimes a body of water) is used as the return path for the current, to avoid the need for a second wire (or neutral wire) to act as a return path. Single-wire earth return is principally used for rural electrification, but also finds use for larger isolated loads such as water pumps. It is also used for high-voltage DC over submarine power cables. Electric single-phase railway traction, such as light rail uses a very similar system. It uses resistors to earth to reduce hazards from rail voltages, but the primary return currents are through the rails.