Fast fault detection for power distribution systems
... In the first chapters of the thesis the term “fast” is used in a general manner. The term is later defined based upon considerations and conclusions made in the first chapters and then related to a specific time. To be able to understand and appreciate why fast fault detection is necessary, power system ...
... In the first chapters of the thesis the term “fast” is used in a general manner. The term is later defined based upon considerations and conclusions made in the first chapters and then related to a specific time. To be able to understand and appreciate why fast fault detection is necessary, power system ...
Labworks Inc.
... shakers are primarily force generators, a shaker system must provide the force necessary to produce the accelerations required on the test specimen and its mounting fixture. This required force is readily calculated by multiplying the sinusoidal peak acceleration desired by the total moving mass. Th ...
... shakers are primarily force generators, a shaker system must provide the force necessary to produce the accelerations required on the test specimen and its mounting fixture. This required force is readily calculated by multiplying the sinusoidal peak acceleration desired by the total moving mass. Th ...
installation and operators guide - Vista Professional Outdoor Lighting
... possible your total lamp wattage. For example: if you have 13 fixtures all rated at 20 watts, you will need a 300-watt transformer (13 x 20 = 260 watts plus 10% = 286). If your total wattage is too great, either divide the total load between two transformers or use a more powerful model. Selecting a ...
... possible your total lamp wattage. For example: if you have 13 fixtures all rated at 20 watts, you will need a 300-watt transformer (13 x 20 = 260 watts plus 10% = 286). If your total wattage is too great, either divide the total load between two transformers or use a more powerful model. Selecting a ...
file (7.8 MB, pdf)
... • The parallel R-C circuit time constant is typically 100 times the time period corresponding to the minimum frequency of operation. • The R-C time constant also controls the response time. • Slew rate is the primary specification that needs to be looked into while choosing the right opamp for the c ...
... • The parallel R-C circuit time constant is typically 100 times the time period corresponding to the minimum frequency of operation. • The R-C time constant also controls the response time. • Slew rate is the primary specification that needs to be looked into while choosing the right opamp for the c ...
here - SynQor
... The UPS-3000 Series products can draw power from an AC input having a wide range of voltage and frequency levels, or from an optional 28 V nominal DC input. The AC input has priority over the DC input. The UPS provides up to 3000 VA and 2500 W of AC output power at 115 Vac. The pure sine wave AC out ...
... The UPS-3000 Series products can draw power from an AC input having a wide range of voltage and frequency levels, or from an optional 28 V nominal DC input. The AC input has priority over the DC input. The UPS provides up to 3000 VA and 2500 W of AC output power at 115 Vac. The pure sine wave AC out ...
... The research focus was on modelling the phase noise of the VCO, and was performed by identifying the impulse sensitivity function for various noise sources, followed by analysing its effect on the linear time varying (LTV) model of the oscillators. The analysis led to a closed-form expression for th ...
Strain Gage Installation Technical Data
... thermocouple effects at the junction of dissimilar metals within the measurement circuit. Magnetically induced voltages can occur when wiring is located in a time-varying magnetic field. Magnetic induction can be controlled by using twisted lead wires and forming minimum but equal loop areas in each ...
... thermocouple effects at the junction of dissimilar metals within the measurement circuit. Magnetically induced voltages can occur when wiring is located in a time-varying magnetic field. Magnetic induction can be controlled by using twisted lead wires and forming minimum but equal loop areas in each ...
4316C-part2
... 5.1.13 cord connected equipment — equipment that is intended to be electrically connected to an electric supply by means of a flexible supply cord and attachment plug. 5.1.14 creepage distance — the shortest path between two conductive parts normally carrying current or between a conductive part nor ...
... 5.1.13 cord connected equipment — equipment that is intended to be electrically connected to an electric supply by means of a flexible supply cord and attachment plug. 5.1.14 creepage distance — the shortest path between two conductive parts normally carrying current or between a conductive part nor ...
UM0877
... This system has been designed to evaluate the capabilities of the high-density STM32F103ZE microcontroller to perform a digital power factor corrector. An application example is provided for easy evaluation of the system’s features and performance. The system is intended for demonstration purposes t ...
... This system has been designed to evaluate the capabilities of the high-density STM32F103ZE microcontroller to perform a digital power factor corrector. An application example is provided for easy evaluation of the system’s features and performance. The system is intended for demonstration purposes t ...
Document
... Q. CSX soft starters control only two phases, leaving one phase connected to the supply. Does this mean an additional line contactor must be employed in a circuit breaker/CSX motor branch circuit ? A. No. Use of a two phase soft starter does not require an additional line contactor as compared with ...
... Q. CSX soft starters control only two phases, leaving one phase connected to the supply. Does this mean an additional line contactor must be employed in a circuit breaker/CSX motor branch circuit ? A. No. Use of a two phase soft starter does not require an additional line contactor as compared with ...
monitoring of leakage current for composite insulators and electrical
... The basic function of HIPOT tester is to monitor excessive leakage current to ground. The excessive leakage current flowing to ground indicates a fault in insulation. Hipot tester applies a high voltage across the insulation of device that is tested. This voltage is usually greater 1500 Volts or so ...
... The basic function of HIPOT tester is to monitor excessive leakage current to ground. The excessive leakage current flowing to ground indicates a fault in insulation. Hipot tester applies a high voltage across the insulation of device that is tested. This voltage is usually greater 1500 Volts or so ...
- Truck-Lite
... electrical potential between two points; that is, the potential for electricity to flow. • Usually referenced from “ground.” • In water, voltage is roughly equivalent to the difference in elevation from ground to a tank of water elevated above the ground; the electrical potential is similar to ...
... electrical potential between two points; that is, the potential for electricity to flow. • Usually referenced from “ground.” • In water, voltage is roughly equivalent to the difference in elevation from ground to a tank of water elevated above the ground; the electrical potential is similar to ...
HMC980 数据资料DataSheet下载
... The HMC980 has a built-in over-under current alarm feature. If a fault conditions arises (either under or over current) an alarm signal is generated (ALM, active HIGH). The current alarm signal provided in HMC980 does not affect the operation of the controller. It is included for monitoring purposes ...
... The HMC980 has a built-in over-under current alarm feature. If a fault conditions arises (either under or over current) an alarm signal is generated (ALM, active HIGH). The current alarm signal provided in HMC980 does not affect the operation of the controller. It is included for monitoring purposes ...
LVDS I/O Standard
... Printed-circuit board layout guidelines for the LVDS circuit in Figure 1 are as follows: 1. A multi-layer printed-circuit board with controlled transmission line impedances is required. Characteristic microstrip impedance guidelines are described in Table 1 of XAPP231. 2. All transmission lines betw ...
... Printed-circuit board layout guidelines for the LVDS circuit in Figure 1 are as follows: 1. A multi-layer printed-circuit board with controlled transmission line impedances is required. Characteristic microstrip impedance guidelines are described in Table 1 of XAPP231. 2. All transmission lines betw ...
Device Design for Sub-0.1 for Sample and Hold Circuits m MOSFETs
... logic core on a single chip. It is highly desirable that the traditional analog functional blocks migrate easily to the digital CMOS processes. Sampling circuits, an essential part of the ADCs, act as an interface between the analog world and the signal processing systems and hence must match the pe ...
... logic core on a single chip. It is highly desirable that the traditional analog functional blocks migrate easily to the digital CMOS processes. Sampling circuits, an essential part of the ADCs, act as an interface between the analog world and the signal processing systems and hence must match the pe ...
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.