Generator Protection Overcomes Current Transformer Limitations
... 10 percent for any current from 1 to 20 times the rated current (5 to 100 A) or for any burden not exceeding the 4-ohm standard burden. For Class C CTs, the ratio error will not exceed 10 percent if the secondary terminal voltage VS is not greater than the secondary terminal voltage rating VSTD. AC ...
... 10 percent for any current from 1 to 20 times the rated current (5 to 100 A) or for any burden not exceeding the 4-ohm standard burden. For Class C CTs, the ratio error will not exceed 10 percent if the secondary terminal voltage VS is not greater than the secondary terminal voltage rating VSTD. AC ...
Electrical Safety in the O.R.
... The line isolation monitor alternates rapidly between line A (shown above) and line B, looking for a short on the opposite line. For the meter to check for a short between B and ground, it must create a short between A and ground. This is exactly the circuit the line isolation transformer is trying ...
... The line isolation monitor alternates rapidly between line A (shown above) and line B, looking for a short on the opposite line. For the meter to check for a short between B and ground, it must create a short between A and ground. This is exactly the circuit the line isolation transformer is trying ...
Fast Frequency Acquisition Phase-Frequency Detectors for GSa/s
... pass transistor, one inverter and one NAND gate. In order to properly reset the slave, the pass-transistor output should become high before the master becomes transparent. Hence, the NAND gate delay is counted twice in delay path. The smaller gates in the reset path as compared to the previous desig ...
... pass transistor, one inverter and one NAND gate. In order to properly reset the slave, the pass-transistor output should become high before the master becomes transparent. Hence, the NAND gate delay is counted twice in delay path. The smaller gates in the reset path as compared to the previous desig ...
Laser Interferometer Gravitational Wave Observatory
... signals on the diode segments are used for beam centering on the quadrant diodes. The DC photocurrent is pulled out through a transimpedance amplifier stage, with a nominal transimpedance of 100 ohms (kept relatively low in order to handle up to 100 ma of photocurrent; this could be increased for th ...
... signals on the diode segments are used for beam centering on the quadrant diodes. The DC photocurrent is pulled out through a transimpedance amplifier stage, with a nominal transimpedance of 100 ohms (kept relatively low in order to handle up to 100 ma of photocurrent; this could be increased for th ...
LESSON 8 Parallel and Series Circuits
... bulbs to light – and when they remove one bulb the other bulb also goes out - then they know they have a series circuit. Each student draws the circuit their team has created on their handout. c. Then the equipment person can get materials for #3 (on the handout), creating a parallel circuit. Using ...
... bulbs to light – and when they remove one bulb the other bulb also goes out - then they know they have a series circuit. Each student draws the circuit their team has created on their handout. c. Then the equipment person can get materials for #3 (on the handout), creating a parallel circuit. Using ...
T.C. Neugebauer and D.J. Perreault, “Parasitic Capacitance Cancellation in Filter Inductors,” 2004 IEEE Power Electronics Specialists Conference, Aachen, Germany, June 2004, pp. 3102-3107.
... explored in the past. The topology of the filter network that is created (e.g., Fig. 3b) is identical to coupled inductor filter structures that have been used widely for everything from notch-filtering [11], [12] to “zero ripple” filters [13]– [17] to filters incorporating parasitic inductance canc ...
... explored in the past. The topology of the filter network that is created (e.g., Fig. 3b) is identical to coupled inductor filter structures that have been used widely for everything from notch-filtering [11], [12] to “zero ripple” filters [13]– [17] to filters incorporating parasitic inductance canc ...
Anatomy of Gate Charge
... is best to understand it as such rather than to think, for example, that it is the charge going into CGS, as the name suggests. By the time vGS reaches vDR at t4 in Figure 6, a great deal more charge has gone into CGS than is represented by Qgs, which again is only the charge needed to raise vGS fro ...
... is best to understand it as such rather than to think, for example, that it is the charge going into CGS, as the name suggests. By the time vGS reaches vDR at t4 in Figure 6, a great deal more charge has gone into CGS than is represented by Qgs, which again is only the charge needed to raise vGS fro ...
Table of contents
... 5.4.3 Stopping Procedure for UPS: First pushing the OFF button on the UPS2 and UPS1 step by step, and then turn off the CB4→CB1. 5.4.4 Maintenance for UPS1 when Troubleshooting: *Push the OFF switch of UPS1,and make sure UPS1 on the bypass mode, then turn on CB3,and then turn off CB2→CB4→CB1 step by ...
... 5.4.3 Stopping Procedure for UPS: First pushing the OFF button on the UPS2 and UPS1 step by step, and then turn off the CB4→CB1. 5.4.4 Maintenance for UPS1 when Troubleshooting: *Push the OFF switch of UPS1,and make sure UPS1 on the bypass mode, then turn on CB3,and then turn off CB2→CB4→CB1 step by ...
AD8270 数据手册DataSheet 下载
... approximately 130°C, which is the glass transition temperature, the plastic changes its properties. Even temporarily exceeding this temperature limit may change the stresses that the package exerts on the die, permanently shifting the parametric performance of the amplifiers. Exceeding a temperature ...
... approximately 130°C, which is the glass transition temperature, the plastic changes its properties. Even temporarily exceeding this temperature limit may change the stresses that the package exerts on the die, permanently shifting the parametric performance of the amplifiers. Exceeding a temperature ...
MAX5380/MAX5381/MAX5382 Low-Cost, Low-Power, 8-Bit DACs with 2-Wire Serial Interface in SOT23 General Description
... Typical Operating Characteristics (continued) (VDD = +3.0V (MAX5380), VDD = +5.0V (MAX5381/MAX5382); RL = 10kΩ, TA = +25°C, unless otherwise noted.) ...
... Typical Operating Characteristics (continued) (VDD = +3.0V (MAX5380), VDD = +5.0V (MAX5381/MAX5382); RL = 10kΩ, TA = +25°C, unless otherwise noted.) ...
AN-1001: IGBT and MOSFET Drivers Correctly Calculated
... Strictly speaking the gate charge should be measured exactly at the target gate voltage swing. If the gate charge is taken from a higher gate voltage swing (at low frequency), the calculated drive power requirement is higher than the real drive power requirement (at target frequency). Practically th ...
... Strictly speaking the gate charge should be measured exactly at the target gate voltage swing. If the gate charge is taken from a higher gate voltage swing (at low frequency), the calculated drive power requirement is higher than the real drive power requirement (at target frequency). Practically th ...
Word - Structured Independent Learning
... A capacitor is a device for storing electrical charge that consists of two conducting objects placed near one another but not touching. A typical capacitor consists of two parallel plates of area A separated by a small distance d. ...
... A capacitor is a device for storing electrical charge that consists of two conducting objects placed near one another but not touching. A typical capacitor consists of two parallel plates of area A separated by a small distance d. ...
Disconnecting Means
... corresponding thereto. Various devices are available on the market to provide these functions. Some devices perform only one of these functions and some perform multiple functions. Some devices, such as UL508 disconnects and Manual Motor Protectors have spacing requirements that are less than UL98 d ...
... corresponding thereto. Various devices are available on the market to provide these functions. Some devices perform only one of these functions and some perform multiple functions. Some devices, such as UL508 disconnects and Manual Motor Protectors have spacing requirements that are less than UL98 d ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... In VLSI design various factors effecting thedesign are cost, delay and power consumption, now a days power consumption plays very important role. Adder is the basic building block in design of digital circuits; hence it plays an important role in determining the overall response of digital design. I ...
... In VLSI design various factors effecting thedesign are cost, delay and power consumption, now a days power consumption plays very important role. Adder is the basic building block in design of digital circuits; hence it plays an important role in determining the overall response of digital design. I ...
SL1000 High-Speed Data Acquisition Unit IM 720120-01E 1st Edition
... non-isolation function. It is extremely dangerous if you do not fasten the screws. In addition, if you are measuring high voltage above 42 V, be sure to use the passive probe (701940). • The BNC part of the passive probe (701940) is made of metal. Therefore, use the probe at 42 V or less for isolat ...
... non-isolation function. It is extremely dangerous if you do not fasten the screws. In addition, if you are measuring high voltage above 42 V, be sure to use the passive probe (701940). • The BNC part of the passive probe (701940) is made of metal. Therefore, use the probe at 42 V or less for isolat ...
Sap-Happy - School of Engineering, UC Merced
... gradients. If rain is expected, seal the upper edge with silicon sealant (acetic acid-free if possible to reduce damage to the plant) to prevent water entry. If working on branches, pipe insulation clamped down with plastic cable ties works very well. Setting the power To determine the current requi ...
... gradients. If rain is expected, seal the upper edge with silicon sealant (acetic acid-free if possible to reduce damage to the plant) to prevent water entry. If working on branches, pipe insulation clamped down with plastic cable ties works very well. Setting the power To determine the current requi ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.