Work Coil Design used in Induction Hardening Machine
... probably the most important of these factors. Quite often, the method by which the part is moved into or out of the coil can necessitate large modifications of optimum design. If one part is needed every 30 seconds but a 50 seconds heating time is required, it will be necessary to heat parts in mult ...
... probably the most important of these factors. Quite often, the method by which the part is moved into or out of the coil can necessitate large modifications of optimum design. If one part is needed every 30 seconds but a 50 seconds heating time is required, it will be necessary to heat parts in mult ...
Fundamentals and Advancements in Generator
... field and therefore the frequency of the voltage induced in the stator are governed by the rotor speed. Once the generator breaker is closed, the angular velocity of the rotating magnetic field is governed by the power system frequency. The rotor and prime mover rotating masses have to change speed ...
... field and therefore the frequency of the voltage induced in the stator are governed by the rotor speed. Once the generator breaker is closed, the angular velocity of the rotating magnetic field is governed by the power system frequency. The rotor and prime mover rotating masses have to change speed ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... Extremely Large As 10 Times Full Load Current For A Short Period (Say 5 Cycles). Closer Examination Of DOI: 10.9790/1676-1101046875 ...
... Extremely Large As 10 Times Full Load Current For A Short Period (Say 5 Cycles). Closer Examination Of DOI: 10.9790/1676-1101046875 ...
review of ground fault protection methods for
... Detecting high-impedance faults in compensated distribution circuits requires a device with a very sensitive residual current input. The wattmetric directional method, described later in this paper, is the most commonly used type of directional element. However, the ground fault resistive coverage o ...
... Detecting high-impedance faults in compensated distribution circuits requires a device with a very sensitive residual current input. The wattmetric directional method, described later in this paper, is the most commonly used type of directional element. However, the ground fault resistive coverage o ...
- IEEE Mentor
... projects, offshore platforms for drilling and production of energy sources, and other remote sites requiring continuous electric energy. The size of the individual generators may range from a few hundred kilowatts up to several megawatts depending on the system demand. The prime movers are typically ...
... projects, offshore platforms for drilling and production of energy sources, and other remote sites requiring continuous electric energy. The size of the individual generators may range from a few hundred kilowatts up to several megawatts depending on the system demand. The prime movers are typically ...
S275-10-1 (Discontinued Product)
... through 38 kV. A compact, lightweight device, the Type Cl features submersible configuration, a stored-energy mechanism and dry, solid insulated vacuum interrupters. Line currents are sensed by 1000:1 ratio, encapsulated bushing current transformers on each phase on the interrupter. This provides a ...
... through 38 kV. A compact, lightweight device, the Type Cl features submersible configuration, a stored-energy mechanism and dry, solid insulated vacuum interrupters. Line currents are sensed by 1000:1 ratio, encapsulated bushing current transformers on each phase on the interrupter. This provides a ...
S270-15-2
... as reclosers or reclosing circuit-breakers, to automatically isolate faulted sections of electrical distribution systems. The sectionalizer senses current flow above a preset level, and when the source-side protective device opens to deenergize the circuit, the sectionalizer counts the overcurrent i ...
... as reclosers or reclosing circuit-breakers, to automatically isolate faulted sections of electrical distribution systems. The sectionalizer senses current flow above a preset level, and when the source-side protective device opens to deenergize the circuit, the sectionalizer counts the overcurrent i ...
Configurable Kelvin Technology for Test Optimization
... contact will be the force contact and which one will be the sense contact. However, these concepts don’t address many customer requirements for a Kelvin system, such as the ability to place Kelvin where necessary without the need to buy a new Kelvin solution for every similar package. Kelvin isn’t n ...
... contact will be the force contact and which one will be the sense contact. However, these concepts don’t address many customer requirements for a Kelvin system, such as the ability to place Kelvin where necessary without the need to buy a new Kelvin solution for every similar package. Kelvin isn’t n ...
Control Systems for Marley cooling tower fan motors
... Good practice dictates using dual-element fuses rather than one-time fuses. Dual-element fuses interrupt higher fault currents, generate less heat in the control box, and permit use of smaller fuses for better protection. In addition, if a fuse clip is loose on a one-time fuse, the case can carboniz ...
... Good practice dictates using dual-element fuses rather than one-time fuses. Dual-element fuses interrupt higher fault currents, generate less heat in the control box, and permit use of smaller fuses for better protection. In addition, if a fuse clip is loose on a one-time fuse, the case can carboniz ...
medium-voltage switchgear
... permitted. Bus connection joints shall be insulated with preformed PVC boots held together 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, eliminat ...
... permitted. Bus connection joints shall be insulated with preformed PVC boots held together 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, eliminat ...
MV Circuit Breaker Switchgear 5 kV-15 kV
... permitted. Bus connection joints shall be insulated with preformed PVC boots held together 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, eliminat ...
... permitted. Bus connection joints shall be insulated with preformed PVC boots held together 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, eliminat ...
Relay
A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits as amplifiers: they repeated the signal coming in from one circuit and re-transmitted it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.A type of relay that can handle the high power required to directly control an electric motor or other loads is called a contactor. Solid-state relays control power circuits with no moving parts, instead using a semiconductor device to perform switching. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called ""protective relays"".