here
... B = Magnetic flux density (Weber/m² or Tesla) H = Magnetic field intensity (A/m) μ = Magnetic core permeability (H/m) ...
... B = Magnetic flux density (Weber/m² or Tesla) H = Magnetic field intensity (A/m) μ = Magnetic core permeability (H/m) ...
Power and Grounding for Audio and Audio/Video
... current can be much larger than that for rated sine wave power, but the current peaks quickly, and rarely lasts more than a few hundred milliseconds. Circuit breakers are designed and specified to protect the electrical system in the case of a fault, especially from overheating due to excessive curr ...
... current can be much larger than that for rated sine wave power, but the current peaks quickly, and rarely lasts more than a few hundred milliseconds. Circuit breakers are designed and specified to protect the electrical system in the case of a fault, especially from overheating due to excessive curr ...
Lightplane 1 Recessed (LP1R) Install Instructions
... must be independently supported from the fixture and spaced to fit the fixture width and length before installing the fixture. 6. While protecting finished parts and supporting the fixture, pull CORD(s) to the REMOTE DRIVER(s) and insert CORD through KNOCKOUT in the enclosure and connect to driver o ...
... must be independently supported from the fixture and spaced to fit the fixture width and length before installing the fixture. 6. While protecting finished parts and supporting the fixture, pull CORD(s) to the REMOTE DRIVER(s) and insert CORD through KNOCKOUT in the enclosure and connect to driver o ...
Arena Series LED Luminaire Installation Manual Introduction
... suspect any damage, file a claim as soon as possible with the carrier and notify the nearest Ephesus sales representative (sales@ephesuslighting.com). For long-term storage, put the luminaire in a clean dry place, protected from dirt, water, and sunlight. Provide ample air circulation and heat, if n ...
... suspect any damage, file a claim as soon as possible with the carrier and notify the nearest Ephesus sales representative (sales@ephesuslighting.com). For long-term storage, put the luminaire in a clean dry place, protected from dirt, water, and sunlight. Provide ample air circulation and heat, if n ...
EMI EMISSIONS
... frame exist, an additional bond wire from motor frame to the nearest building structure steel ground is sometimes used in practice to insure a safe touch potential voltage on the frame with respect to local ground. Dedicated System Ground A dedicated grounding system buses and electrodes. Where prac ...
... frame exist, an additional bond wire from motor frame to the nearest building structure steel ground is sometimes used in practice to insure a safe touch potential voltage on the frame with respect to local ground. Dedicated System Ground A dedicated grounding system buses and electrodes. Where prac ...
star_gnd.pdf
... The idea behing the ground star is to have a single point where all the grounds attach to the "reference voltage." In your case, you really don't have a reference voltage per se, as the circuit floats. Now, I don't use a star grounding scheme in any of my amps, I use basically two main grounds point ...
... The idea behing the ground star is to have a single point where all the grounds attach to the "reference voltage." In your case, you really don't have a reference voltage per se, as the circuit floats. Now, I don't use a star grounding scheme in any of my amps, I use basically two main grounds point ...
Single Pole IR
... applying molded case circuit breakers, the manufacturer must be consulted to verify single-pole interrupting ratings are in compliance with NEC Section 110-9. A simple solution exists to insure adequate interrupting ratings both in present installations and in future upgrades. Modern current-limitin ...
... applying molded case circuit breakers, the manufacturer must be consulted to verify single-pole interrupting ratings are in compliance with NEC Section 110-9. A simple solution exists to insure adequate interrupting ratings both in present installations and in future upgrades. Modern current-limitin ...
A. Internal Inductance
... supplies, they usually receive 230-250 V at their inlet points. While a domestic customer with a low power consumption gets a single-phase supply, both industrial and commercial consumers get three-phase supplies not only because their consumption is high but also because many of them use three-phas ...
... supplies, they usually receive 230-250 V at their inlet points. While a domestic customer with a low power consumption gets a single-phase supply, both industrial and commercial consumers get three-phase supplies not only because their consumption is high but also because many of them use three-phas ...
ESP M1 Series
... Minimum permissable load is 5 V DC, 10 mA to ensure reliable operation. The maximum transient voltage let-through of the protector throughout the test (±5%), phase to neutral, phase to earth and neutral to earth. ...
... Minimum permissable load is 5 V DC, 10 mA to ensure reliable operation. The maximum transient voltage let-through of the protector throughout the test (±5%), phase to neutral, phase to earth and neutral to earth. ...
M - Chauvin Arnoux
... Correct earthing guarantees user safety and also protects property and installations in the event of lightning or fault currents. It must always be linked to a cut-off device. There are many different methods for earth measurements and choice of the right one depends on the type of neutral system, t ...
... Correct earthing guarantees user safety and also protects property and installations in the event of lightning or fault currents. It must always be linked to a cut-off device. There are many different methods for earth measurements and choice of the right one depends on the type of neutral system, t ...
Reverse-Logic Control of Load Tap Changers in Emergency Voltage
... logic is triggered by the voltage V at a single, representative transmission bus. However, the value of V that triggers the reverse logic will be different from one LTC layer to the other. We denote by Vumin (resp. and Vlmin ) the threshold used in the upper (resp. lower) layer of a given cluster. T ...
... logic is triggered by the voltage V at a single, representative transmission bus. However, the value of V that triggers the reverse logic will be different from one LTC layer to the other. We denote by Vumin (resp. and Vlmin ) the threshold used in the upper (resp. lower) layer of a given cluster. T ...
loop resistance tester
... only about once every 3,000 hr (about once a year) on a commercial airplane. This rate is frequent enough for a lightning strike to be considered almost inevitable. Lightning produces a current in the airplane skin, generating voltages across joints in the skin and structure. These currents couple, ...
... only about once every 3,000 hr (about once a year) on a commercial airplane. This rate is frequent enough for a lightning strike to be considered almost inevitable. Lightning produces a current in the airplane skin, generating voltages across joints in the skin and structure. These currents couple, ...
HOW TO SPECIFY THE OPTIMUM NON-GAPPED LINE ARRESTERS (NGLA)
... or together with other systems like controlled switching. The target is always non-tripping due to switching. Typically the energy/charge requirements for these NGLA is one class lower than for the substation arresters as they see only half or one third of the line length. The third application is t ...
... or together with other systems like controlled switching. The target is always non-tripping due to switching. Typically the energy/charge requirements for these NGLA is one class lower than for the substation arresters as they see only half or one third of the line length. The third application is t ...
12-VOLT NEGATIVE GROUND INSTRUCTIONS For Part
... Determine the proper wire length, and attach the provided terminals. (Use a wire crimping tool to achieve an adequate connection). • To remove a ballast resistor, (normally white ceramic blocks 3 to 4 inches long), disconnect all wires on both ends of the ballast resistor. Remove the resistor from ...
... Determine the proper wire length, and attach the provided terminals. (Use a wire crimping tool to achieve an adequate connection). • To remove a ballast resistor, (normally white ceramic blocks 3 to 4 inches long), disconnect all wires on both ends of the ballast resistor. Remove the resistor from ...
module 1
... voltages. Since domestic customers get single-phase supplies, they usually receive 230-250 V at their inlet points. While a domestic customer with a low power consumption gets a single-phase supply, both industrial and commercial consumers get three-phase supplies not only because their consumption ...
... voltages. Since domestic customers get single-phase supplies, they usually receive 230-250 V at their inlet points. While a domestic customer with a low power consumption gets a single-phase supply, both industrial and commercial consumers get three-phase supplies not only because their consumption ...
Guidelines for the Design, Installation, Operation
... To determine presence of voltage in an underground supply cable, crews have been “stripping” the insulation off the cable exposing the bare conductor and re-taping. One incident root cause was found to have the insulation stripped and left bare in the handwell. Often times, the compromised integrity ...
... To determine presence of voltage in an underground supply cable, crews have been “stripping” the insulation off the cable exposing the bare conductor and re-taping. One incident root cause was found to have the insulation stripped and left bare in the handwell. Often times, the compromised integrity ...
PDF
... consistently high degree of efficiency right across the input voltage range.It is often incorrectly assumed that the maximum degree of efficiency at a particular voltage is one of the factors responsible for producing a good annual yield, when it is in fact the more or less constant degree of effici ...
... consistently high degree of efficiency right across the input voltage range.It is often incorrectly assumed that the maximum degree of efficiency at a particular voltage is one of the factors responsible for producing a good annual yield, when it is in fact the more or less constant degree of effici ...
EE6501_PSA_Unit_ - e
... 11. Name the diagonal and off-diagonal elements of bus impedance matrix. (Nov 2013) 12. Draw the impedance diagram for the given single line representation of the power system. (May 2014) ...
... 11. Name the diagonal and off-diagonal elements of bus impedance matrix. (Nov 2013) 12. Draw the impedance diagram for the given single line representation of the power system. (May 2014) ...
Complete PDF Edition (762 KB)
... stress associated with power dissipation. Nonuniform current flow within an element will cause heat concentrations that can lead to element destruction at lower-than-expected energy duty. We therefore tested each element and discarded those exhibiting poor current uniformity. The elements were scree ...
... stress associated with power dissipation. Nonuniform current flow within an element will cause heat concentrations that can lead to element destruction at lower-than-expected energy duty. We therefore tested each element and discarded those exhibiting poor current uniformity. The elements were scree ...
Behaviour of transformers under DC/GIC excitation
... Susceptibility to geomagnetically induced currents or significant stray DC currents as ground return mode (GRM) DC currents may impact the substation design. Some utilities have experimented use of Neutral DC Current Blocking Devices to limit the harmful effect of these currents [7]. More generally, ...
... Susceptibility to geomagnetically induced currents or significant stray DC currents as ground return mode (GRM) DC currents may impact the substation design. Some utilities have experimented use of Neutral DC Current Blocking Devices to limit the harmful effect of these currents [7]. More generally, ...
Powerware 9305 7.5
... Hot Sync™ parallel load sharing technology. It is designed for parallel redundant N+1 systems to satisfy the 7/24h applications. The Hot Sync™ can also be used in parallel capacity systems to benefit from the scalability for customer's everincreasing load demands. Competitive UPS products on the mar ...
... Hot Sync™ parallel load sharing technology. It is designed for parallel redundant N+1 systems to satisfy the 7/24h applications. The Hot Sync™ can also be used in parallel capacity systems to benefit from the scalability for customer's everincreasing load demands. Competitive UPS products on the mar ...
Ideal Transformer Model
... The principal transformer parasitics will now be described and incorporated into a more complete transformer equivalent circuit model. Winding Resistance While the resistances of the windings can be kept small by using appropriate size wire for a specific application, the resistance can never be mad ...
... The principal transformer parasitics will now be described and incorporated into a more complete transformer equivalent circuit model. Winding Resistance While the resistances of the windings can be kept small by using appropriate size wire for a specific application, the resistance can never be mad ...
chapter 1 - Portal UniMAP
... When AC voltage is applied to the primary winding of the transformer, an AC current will result i1 or i2 (current at load). The AC primary current i1 set up time varying magnetic flux f in the core. The flux links the secondary winding of the transformer. From the Faraday law, the emf will be ...
... When AC voltage is applied to the primary winding of the transformer, an AC current will result i1 or i2 (current at load). The AC primary current i1 set up time varying magnetic flux f in the core. The flux links the secondary winding of the transformer. From the Faraday law, the emf will be ...
Tools of the Trade - Volunteer Energy Cooperative
... Overhead primary conductor typically used on VEC distribution lines is called ACSR, which stands for Aluminum Conductor Steel Reinforced. The largest distribution lines (those with the largest diameter line) are those located just outside VEC substations where the current is the heaviest. As you g ...
... Overhead primary conductor typically used on VEC distribution lines is called ACSR, which stands for Aluminum Conductor Steel Reinforced. The largest distribution lines (those with the largest diameter line) are those located just outside VEC substations where the current is the heaviest. As you g ...
EE411_Balanced_Three_Phase_Phasors.doc Page 1 of 6 The
... (i.e., same line currents Ia, Ib, Ic and phase-to-phase voltages Vab, Vbc, Vca in both cases) ...
... (i.e., same line currents Ia, Ib, Ic and phase-to-phase voltages Vab, Vbc, Vca in both cases) ...
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.