Measuring short time intervals - Veletrh nápadů učitelů fyziky
... sufficient time before every measurement. We must also be aware of the polarity of the electrolytic capacitor. The usual modern electrolytic capacitors have a mark on the negative pole which must be connected to the negative pole of the battery. ...
... sufficient time before every measurement. We must also be aware of the polarity of the electrolytic capacitor. The usual modern electrolytic capacitors have a mark on the negative pole which must be connected to the negative pole of the battery. ...
DeltaV™ Bulk Power Supplies
... 120/230 VAC nominal, 90 VAC to 264 VAC range, 47 Hz to 63 Hz, single-phase ...
... 120/230 VAC nominal, 90 VAC to 264 VAC range, 47 Hz to 63 Hz, single-phase ...
MAX1575 White LED 1x/1.5x Charge Pump for Main and Sub-Displays General Description
... LEDs in the main display and up to two white LEDs in the sub-display with regulated constant current for uniform intensity. By utilizing adaptive 1x/1.5x chargepump modes and very-low-dropout current regulators, it achieves high efficiency over the full 1-cell lithiumbattery input voltage range. A 1 ...
... LEDs in the main display and up to two white LEDs in the sub-display with regulated constant current for uniform intensity. By utilizing adaptive 1x/1.5x chargepump modes and very-low-dropout current regulators, it achieves high efficiency over the full 1-cell lithiumbattery input voltage range. A 1 ...
PCITS2000/2 Primary Current Injection Test Sets
... is carried out using secondary current injection with equipment such as the SCITS100 (100 A) or SCITS50D (50 A). As many of the protection systems requiring testing have a critical performance in relation to time, the primary current injection test sets incorporate a time counter facility. The secon ...
... is carried out using secondary current injection with equipment such as the SCITS100 (100 A) or SCITS50D (50 A). As many of the protection systems requiring testing have a critical performance in relation to time, the primary current injection test sets incorporate a time counter facility. The secon ...
Metal-Clad Switchgear or Metal-Enclosed
... control and auxiliary devices. Access to the interior of the enclosure is provided by doors or removable covers, or both. This definition appears in all three of the ANSI/IEEE standards covering the types of metal-enclosed power switchgear: C37.20.1, Metal-Enclosed Low Voltage Power Circuit Breaker ...
... control and auxiliary devices. Access to the interior of the enclosure is provided by doors or removable covers, or both. This definition appears in all three of the ANSI/IEEE standards covering the types of metal-enclosed power switchgear: C37.20.1, Metal-Enclosed Low Voltage Power Circuit Breaker ...
Alternative energy lab handout
... An LED (light emitting diode) is a semiconductor device that converts electricity into light with very high efficiency. LEDs now come in many colors although those emitting high energy blue and purple photons are very expensive. It is expected that their prices will come down substantially in the ne ...
... An LED (light emitting diode) is a semiconductor device that converts electricity into light with very high efficiency. LEDs now come in many colors although those emitting high energy blue and purple photons are very expensive. It is expected that their prices will come down substantially in the ne ...
Reversible Current Power Supply for Fast-Field
... Relaxometers are usually composed by a magnet, where the sample is put, an acquisition system, that is, most of the times a Radio-Frequency system, that sends periodic pulses, and the power supply, that should be able to provide the needed magnetic field, in the form of a current waveform. The main ...
... Relaxometers are usually composed by a magnet, where the sample is put, an acquisition system, that is, most of the times a Radio-Frequency system, that sends periodic pulses, and the power supply, that should be able to provide the needed magnetic field, in the form of a current waveform. The main ...
KSE340 KSE 340 High Voltage General Purpose Applications
... or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. ...
... or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. ...
Lecture 15 - UniMAP Portal
... of any significance? At every instant of time along the power curve that the curve is above the axis (positive), energy must be supplied to the inductor, even though it will be returned during the negative portion of the cycle. This power requirement during the positive portion of the cycle require ...
... of any significance? At every instant of time along the power curve that the curve is above the axis (positive), energy must be supplied to the inductor, even though it will be returned during the negative portion of the cycle. This power requirement during the positive portion of the cycle require ...
The Seven Types of Power Problems
... of an oscillatory transient occurs. For example, upon turning off a spinning motor, it acts briefly as a generator as it powers down, thereby producing electricity and sending it through the electrical distribution. A long electrical distribution system can act like an oscillator when power is switc ...
... of an oscillatory transient occurs. For example, upon turning off a spinning motor, it acts briefly as a generator as it powers down, thereby producing electricity and sending it through the electrical distribution. A long electrical distribution system can act like an oscillator when power is switc ...
Lesson: 23
... The primary of the transformer shown in figure 23.2 is energized from a.c source and potential of terminal 1 with respect to terminal 2 is v12 = Vmaxsinωt. Naturally polarity of 1 is sometimes +ve and some other time it is –ve. The dot convention helps us to determine the polarity of the induced vol ...
... The primary of the transformer shown in figure 23.2 is energized from a.c source and potential of terminal 1 with respect to terminal 2 is v12 = Vmaxsinωt. Naturally polarity of 1 is sometimes +ve and some other time it is –ve. The dot convention helps us to determine the polarity of the induced vol ...
16) It`s the Law, per Mr Ohm Ω
... • T5C08 Power in watts is equal to volts times current in amps. A 100-watt light bulb, running on 110 VAC house voltage, will draw about 1 amp. The magic circle for power is: P over E I. Cover the unknown quantity with your finger, and perform the mathematical operation represented by the remaining ...
... • T5C08 Power in watts is equal to volts times current in amps. A 100-watt light bulb, running on 110 VAC house voltage, will draw about 1 amp. The magic circle for power is: P over E I. Cover the unknown quantity with your finger, and perform the mathematical operation represented by the remaining ...
Three Phase Cascaded H-Bridge Multilevel Inverter with Ac
... voltages in series and uses the central tap as the neutral. However, this power converter needs a complex control system in order to balance the capacitor Voltage. The diode-clamped inverter uses a single dc bus that issubdivided into a number of voltage levels by a series string ofCapacitors. A mat ...
... voltages in series and uses the central tap as the neutral. However, this power converter needs a complex control system in order to balance the capacitor Voltage. The diode-clamped inverter uses a single dc bus that issubdivided into a number of voltage levels by a series string ofCapacitors. A mat ...
MCB 115 Programmable I/O Option Module Instructions TR200
... Turning the drive into a decentralized I/O block supporting Building Automation System with inputs and ...
... Turning the drive into a decentralized I/O block supporting Building Automation System with inputs and ...
AC Magnitude and Phase
... 1. Using any method, set the waveform generator for 200mV pk-pk using a 50 kHz sine wave. 2. Measure the 470Ω resistor using the Fluke 45 as an Ohmmeter. Measure the inductor using the universal bridge on the instructor’s table. Make sure the bridge is set to Auto and 1 kHz when you take your measur ...
... 1. Using any method, set the waveform generator for 200mV pk-pk using a 50 kHz sine wave. 2. Measure the 470Ω resistor using the Fluke 45 as an Ohmmeter. Measure the inductor using the universal bridge on the instructor’s table. Make sure the bridge is set to Auto and 1 kHz when you take your measur ...
Switched-mode power supply
A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.