Insulation Resistance Testing: How Many Megohms
... For many years the IEEE 43 standard used the rule of “kV + 1” (1 kV = 1000 volts) to determine the minimum megohms for rotating electrical machinery. After nearly three decades of being reaffirmed, from 1974 to 2000, the standard was significantly revised for the 2000 edition. IEEE 43 now states tha ...
... For many years the IEEE 43 standard used the rule of “kV + 1” (1 kV = 1000 volts) to determine the minimum megohms for rotating electrical machinery. After nearly three decades of being reaffirmed, from 1974 to 2000, the standard was significantly revised for the 2000 edition. IEEE 43 now states tha ...
user`s manual
... WE does not have a built-in power supply. Instead it uses a plug-in type external power supply (AC adapter). One reason for this feature is electrical safety. Keeping danger voltages (main) out of the WE increases the electrical safety. Therefore an external power supply of high quality and safety s ...
... WE does not have a built-in power supply. Instead it uses a plug-in type external power supply (AC adapter). One reason for this feature is electrical safety. Keeping danger voltages (main) out of the WE increases the electrical safety. Therefore an external power supply of high quality and safety s ...
Siemens STEP 2000 Course
... Short-term overloads, such as motor starting current, may cause nuisance openings of nontime-delay fuses. They are best used in circuits not subject to large transient surge currents. Nontime-delay fuses usually hold 500% of their rating for approximately one-fourth second, after which the current c ...
... Short-term overloads, such as motor starting current, may cause nuisance openings of nontime-delay fuses. They are best used in circuits not subject to large transient surge currents. Nontime-delay fuses usually hold 500% of their rating for approximately one-fourth second, after which the current c ...
FEASIBILITY OF A PLASMA CONTACT FOR FARADAY
... (http://www.mersen.com/uploads/tx_mersen/5-carbon-brush-technical-guidemersen.pdf). The mechanical factors include surface tribology of contacting surface – ideally the contact surface should neither be too smooth nor too rough, variable friction co-efficient of the brush, vibrations of the device ...
... (http://www.mersen.com/uploads/tx_mersen/5-carbon-brush-technical-guidemersen.pdf). The mechanical factors include surface tribology of contacting surface – ideally the contact surface should neither be too smooth nor too rough, variable friction co-efficient of the brush, vibrations of the device ...
UCC2808A-1 数据资料 dataSheet 下载
... the UCC3808A, a low impedance circuit board ground plane is highly recommended. OUTA and OUTB: Alternating high current output stages. Both stages are capable of driving the gate of a power MOSFET. Each stage is capable of 500-mA peak-source current, and 1-A peak-sink current. The output stages swit ...
... the UCC3808A, a low impedance circuit board ground plane is highly recommended. OUTA and OUTB: Alternating high current output stages. Both stages are capable of driving the gate of a power MOSFET. Each stage is capable of 500-mA peak-source current, and 1-A peak-sink current. The output stages swit ...
ICL7106-07 - Part Number Search
... The Maxim ICL7106/ICL7107 are monolithic analog-todigital converters (ADCs). They have very high input impedances and require no external display drive circuitry. On-board active components include polarity and digit drivers, segment decoders, voltage reference and a clock circuit. The ICL7106 will ...
... The Maxim ICL7106/ICL7107 are monolithic analog-todigital converters (ADCs). They have very high input impedances and require no external display drive circuitry. On-board active components include polarity and digit drivers, segment decoders, voltage reference and a clock circuit. The ICL7106 will ...
USB Host Charger Identification Analog Switch MAX14550E General Description Features
... The MAX14550E is a combination of a Hi-Speed USB analog switch and a charger host identification detection analog switch, which allows USB hosts to identify the USB port as a charger port when the USB host is in a low-power mode and cannot enumerate USB devices. The MAX14550E features a high-perform ...
... The MAX14550E is a combination of a Hi-Speed USB analog switch and a charger host identification detection analog switch, which allows USB hosts to identify the USB port as a charger port when the USB host is in a low-power mode and cannot enumerate USB devices. The MAX14550E features a high-perform ...
medium-voltage switchgear
... with nylon hardware for easy installation and removal during servicing. Copper bus bars shall be bead-blasted prior to applying epoxy coating to assure a proper bond between the epoxy and the bus bar, eliminating partial discharges. Each bus segment shall be individually highpotential tested prior t ...
... with nylon hardware for easy installation and removal during servicing. Copper bus bars shall be bead-blasted prior to applying epoxy coating to assure a proper bond between the epoxy and the bus bar, eliminating partial discharges. Each bus segment shall be individually highpotential tested prior t ...
Kanthal® Globar® SD Silicon carbide heating elements
... silicon carbide (SiC) heating elements. Kanthal® Globar® SD (SiC) elements are manufactured in recrystallized alpha silicon carbide, and have been designed to maximize performance in the widest range of high temperature equipment. Kanthal Globar SD elements are used in applications ranging in temper ...
... silicon carbide (SiC) heating elements. Kanthal® Globar® SD (SiC) elements are manufactured in recrystallized alpha silicon carbide, and have been designed to maximize performance in the widest range of high temperature equipment. Kanthal Globar SD elements are used in applications ranging in temper ...
Incandescent Lamp Application Information
... voltage across them will fail prematurely. Constant Current When lamps operate from a constant or nearly constant current source, as in the case of a series resistance, life is reduced approximately 50%. In both cases, the increase in resistance from Tungsten evaporation results in a higher voltage ...
... voltage across them will fail prematurely. Constant Current When lamps operate from a constant or nearly constant current source, as in the case of a series resistance, life is reduced approximately 50%. In both cases, the increase in resistance from Tungsten evaporation results in a higher voltage ...
DESD5V0S1BL Features Mechanical Data
... written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instruct ...
... written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instruct ...
Positive Voltage Hotswap Controller and I2C Current Monitor (Rev. B)
... EN: The GATE driver is enabled if the positive threshold is exceeded and the internal POR and UVLO thresholds have been satisfied. EN can be used as a logic control input, an analog input voltage monitor as illustrated by R1/R2 in the Functional Block Diagram, or it can be tied to VCC to always enab ...
... EN: The GATE driver is enabled if the positive threshold is exceeded and the internal POR and UVLO thresholds have been satisfied. EN can be used as a logic control input, an analog input voltage monitor as illustrated by R1/R2 in the Functional Block Diagram, or it can be tied to VCC to always enab ...
Impact of Dimming White LEDs
... There are two general methods to generate white light with LEDs. The first is by the use of phosphors together with a short-wavelength LED, resulting in a broadband radiation spectrum, referred to as a phosphor-converted white LED, or PC white LED [2-5]. The second method is to utilize mixed light f ...
... There are two general methods to generate white light with LEDs. The first is by the use of phosphors together with a short-wavelength LED, resulting in a broadband radiation spectrum, referred to as a phosphor-converted white LED, or PC white LED [2-5]. The second method is to utilize mixed light f ...
S260-75-1
... retarded timing operations of the backup device due to the presence of the fault. It is recommended that the time delay before transfer from preferred to alternate source is set to exceed the maximum cumulative time to lockout of the backup protective device. This approach assures that the transfer ...
... retarded timing operations of the backup device due to the presence of the fault. It is recommended that the time delay before transfer from preferred to alternate source is set to exceed the maximum cumulative time to lockout of the backup protective device. This approach assures that the transfer ...
the catalogue now (pdf 5.6Mb)
... With Premset, intelligence can be added to functional units by integrating protection, control and monitoring IEDs (Intelligent Electrical Devices). The IEDs have dedicated locations and cabling and are daisy-chained throughout the various functional units using RJ45 connectors and Modbus protocol. ...
... With Premset, intelligence can be added to functional units by integrating protection, control and monitoring IEDs (Intelligent Electrical Devices). The IEDs have dedicated locations and cabling and are daisy-chained throughout the various functional units using RJ45 connectors and Modbus protocol. ...
On the selection and installation of surge protection devices in a TT
... the initial peak. These components, which are called as continuing currents, may exist for several hundred milliseconds. The duration and magnitude of continuing currents of positive lightning may be several times greater than the above mentioned values which are typical for the negative lightning. ...
... the initial peak. These components, which are called as continuing currents, may exist for several hundred milliseconds. The duration and magnitude of continuing currents of positive lightning may be several times greater than the above mentioned values which are typical for the negative lightning. ...
ZR285 Description Pin Assignment
... device is available in a small outline surface mount package, ideal for applications where space saving is important. The ZR285 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZR285 is recommended for operation between 20μA and 20mA and so is i ...
... device is available in a small outline surface mount package, ideal for applications where space saving is important. The ZR285 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZR285 is recommended for operation between 20μA and 20mA and so is i ...
lecture1424353251
... This document does not claim any originality and cannot be used as a substitute for prescribed textbooks. The information presented here is merely a collection by the committee members for their respective teaching assignments. Various sources as mentioned at the end of the document as well as freel ...
... This document does not claim any originality and cannot be used as a substitute for prescribed textbooks. The information presented here is merely a collection by the committee members for their respective teaching assignments. Various sources as mentioned at the end of the document as well as freel ...
Current source
A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it.A current source is the dual of a voltage source. The term constant-current 'sink' is sometimes used for sources fed from a negative voltage supply. Figure 1 shows the schematic symbol for an ideal current source, driving a resistor load. There are two types - an independent current source (or sink) delivers a constant current. A dependent current source delivers a current which is proportional to some other voltage or current in the circuit.