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Manufacturing industry constant resistors

Manufacturing industry constant resistors

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VIDEO ON THE TOPIC: How To Calculate The Voltage Drop Across a Resistor - Electronics

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About Riedon Resistors

A periodic current the average value of which over a period is zero. The temperature of the surrounding coiling medium, such as gas or liquid, which comes into contact with heated parts of the apparatus.

The unit of constant current which, maintained in two parallel rectilinear conductors of infinite length separated by a distance of one meter, produces between these conductors a force equal to 2x mks meter-kilogramsecond units of force per meter of length.

A resistor connected in series with the armature of a motor either to limit the inrush current on starting, the gradual short circuiting of which brings the motor to normal speed, or to regulate the speed by armature-voltage control.

A resistor equipped with slotted metal end j brackets that serve as a means of mounting and connecting to the resistor. That property of a system of conductors and dielectrics which permits the storage of electricity when potential differences exist between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive. A device, the primary purpose of which is to introduce capacitance into an electric circuit.

Capacitors are usually classified, according to their dielectrics, as air capacitors, mica capacitors, paper capacitors, etc. The shortest distance through space between two live parts, between live parts and supports or other objects, or between any live part and grounded part. A body so constructed from conducting material that it may be used as a carrier of electric current.

A requirement of service that demands operation at a substantially constant load for un indefinitely long time. Continuous rating is the rating that defines the load which can be carried for an indefinitely long time.

A resistor that is capable of carrying continuously the current for which it is designed without exceeding the specified temperature rise. Convection is the motion resulting in a fluid owing to differences of density and the action of gravity. A tubular resistor consisting of an alloy resistance ribbon, crimped and edgewound on a ceramic core, the ribbon being securely and permanently fastened to the core by vitreous enamel or cement.

The shortest distance between conductors of opposite polarity or between a live part and ground as measured over the surface of the supporting material. A resistor inserted into an electric circuit to limit the flow of current to some predetermined value. Note: A currentlimiting resistor, usually in series with a fuse or circuit breaker, may be employed to limit the flow of circuit or system energy at the time of a fault or short-circuit.

The dielectric strength of an insulating material is the maximum potential gradient that the material can withstand without rupture. A test which consists of the application of a voltage higher than the rated voltage for a specified time for the purpose of determining the adequacy against breakdown of insulating materials and spacings under normal conditions.

A unidirectional current in which the changes in value are either zero or so small that they may be neglected. A given current would be considered a direct current in some applications, but would not necessarily be so considered in other applications. A high-current resistor made of an alloy resistance ribbon wound on edge forming an oval-shaped coil supported by grooved insulators which space adjacent turns and insulate them from the support bars.

Support bars are secured to steel end pieces forming a sturdy resistor suitable for continuous-andintermittent-duty applications.

The electromotive force is the agency causing the flow of current in a circuit. It is the electrical pressure or drop measured in volts. The unit of capacitance of an electric condenser in which a charge of one coulomb produces a difference of potential of one volt between the poles of the capacitor. A switch usually of the knife blade type having auxiliary contacts for connecting the field of a generator or motor across a resistor field discharge at the instant preceding the opening of the switch.

The unit of inductance of a closed circuit in which an electromotive force of one volt is produced when the electric current traversing the circuit varies uniformly at the rate of one ampere per second. The apparent resistance of an AC circuit, being the combination of both the resistance and reactance. It is equal to the ratio of the value of the EMF between the terminals to the current, there being no source of power in the portion under consideration.

The unit of impedance is the ohm and is represented by Z. The scalar property of an electric circuit or of two neighboring circuits which determines the electromotive force induced in one of the circuits by a change of current in either of them.

A requirement of service that demands operation for alternate intervals of 1 load and no-load; or 2 load and rest; or 3 load, no-load and rest; such alternate intervals being definitely specified. A resistor capable of carrying for a short period of time the high overload current for which it is designed without exceeding the specified temperature rise.

A resistor for use in the armature or rotor circuit of a motor in which the armature current is almost constant. The National Electrical Manufacturers Association, a non-profit trade association, supported by the manufacturers of electrical apparatus and supplies. NEMA is engaged in standardization to facilitate understanding between the manufacturers and users of electrical products.

A non-inductive power resistor is one in which the inductance and distributed capacitance are reduced to an absolute minimum. The rating which defines the load which can be carried for the alternate periods of load and rest specified in the rating, the apparatus starting cold and for the total time specified in the rating without causing any of the specified limitations to be exceeded.

The time rate of transferring or transforming energy; the rate of doing work or expending energy. A designated limit of operating characteristics of a machine, apparatus or device, based on definite conditions.

Note 1: Such operating characteristics as load, voltage, frequency, etc. Note 2: The rating of control apparatus in general is expressed in volts, amperes, horsepower or kilowatts as may be appropriate, except that resistors are rated in ohms, amperes and class of service.

A device used for introducing reactance into a circuit for purposes such as motor starting, paralleling transformers and control of current. A device which converts alternating current to unidirectional current by virtue of a characteristic permitting appreciable flow of current in only one direction. This method consists in the determination of temperature by comparison of the resistance of the winding at the temperature to be determined with the resistance at a known temperature.

The resistance tolerance of a power resistor is the extent to which its resistance may be permitted to deviate above or below the specified resistance. Resistance tolerance is usually expressed in percent.

The scalar property of an electric circuit or of any body which may be used as part of an electric circuit which determines for a given current the rate at which electric energy is converted into heat or radiant energy and which has a value such that the product of the resistance and the square of the current gives the rate of conversion of energy.

In the general case, resistance is a function of the current, but the term is most commonly used in connection with circuits where the resistance is independent of the current.

A resistive conductor is a conductor used primarily because it possesses the property of high electric resistance. The resistivity of a material is the resistance of a sample of the material having specified dimensions.

The resistor core or base of a power resistor is the insulating support on which the resistive conductor is wound. An adjustable resistor so constructed that its resistance may be changed without opening the circuit in which it may be connected.

A power-type resistor equipped with Edison-type screw-base terminals for quick interchangeability. The rating that defines the load which can be carried for a short and definitely specified time, the machine, apparatus or device being at approximately room temperature at the time the load is applied. A resistor that has only one layer of resistance wire or ribbon wound around the insulating base or core.

A resistor consisting of a hollow ceramic core, oval in shape, about which resistance wire is wound and completely embedded in an insulating and heat conducting coating. Still air is considered air having no circulation except that created by the heat of the resistor which is being operated. A measure of the increase or decrease in resistance of a resistive conductor due to change in temperature in parts per million ppm. Temperature rise is the difference in temperature between the initial and final temperature of a resistor.

Temperature rise is expressed in degrees C or F, usually referred to an ambient temperature. Temperature rise equals the hot spot temperature minus the ambient temperature.

Thermal shock consists of a sudden marked change in the temperature of the medium in which the device operates. A device for converting heat energy into electrical energy consisting of a pair of dissimilar conductors so joined as to produce a thermo-electric effect.

It is used with a millivoltmeter to measure temperature rise in apparatus. This method consists in the determination of the temperature by a mercury or alcohol thermometer, by a resistance thermometer, or by a thermocouple, any of these instruments being applied to the hottest part of the apparatus accessible to a mercury or alcohol thermometer. A requirement of service that demands operation at loads, and for intervals of time, both of which may be subject to wide variation.

The unit of measure is the volt. A unit of electrical pressure, EMF or potential difference. The unit of measure is in parts per million ppm. Voltage coefficient defines the change in the value of the resistor that occurs as the voltage changes. The resistor is measured at two voltages and the deviation is then calculated.

VCR is usually states as the change per volt ex. A unit of electric power. It is the power expended when one ampere of direct current flows through a resistor of one ohm. The distance from any point on a turn of a resistive conductor to the corresponding point on an adjacent turn measured parallel to the long axis of the winding.

Go to Navigation Go to Content. Alternating Current: A periodic current the average value of which over a period is zero. Ambient Temperature: The temperature of the surrounding coiling medium, such as gas or liquid, which comes into contact with heated parts of the apparatus. Ampere: The unit of constant current which, maintained in two parallel rectilinear conductors of infinite length separated by a distance of one meter, produces between these conductors a force equal to 2x mks meter-kilogramsecond units of force per meter of length.

Armature Resistor: A resistor connected in series with the armature of a motor either to limit the inrush current on starting, the gradual short circuiting of which brings the motor to normal speed, or to regulate the speed by armature-voltage control. Bracket Terminal Resistor: A resistor equipped with slotted metal end j brackets that serve as a means of mounting and connecting to the resistor.

Capacitance: That property of a system of conductors and dielectrics which permits the storage of electricity when potential differences exist between the conductors. Capacitor: A device, the primary purpose of which is to introduce capacitance into an electric circuit. Clearance: The shortest distance through space between two live parts, between live parts and supports or other objects, or between any live part and grounded part.

Conduction: The transmission of heat or electricity through, or by means of, a conductor. Conductor: A body so constructed from conducting material that it may be used as a carrier of electric current. Continuous Duty: A requirement of service that demands operation at a substantially constant load for un indefinitely long time.

Continuous Rating: Continuous rating is the rating that defines the load which can be carried for an indefinitely long time. Continuous-Duty Resistor: A resistor that is capable of carrying continuously the current for which it is designed without exceeding the specified temperature rise. Convection: Convection is the motion resulting in a fluid owing to differences of density and the action of gravity.

Creepage Distance: The shortest distance between conductors of opposite polarity or between a live part and ground as measured over the surface of the supporting material.

Current-limiting Resistor: A resistor inserted into an electric circuit to limit the flow of current to some predetermined value. Dielectric Strength: The dielectric strength of an insulating material is the maximum potential gradient that the material can withstand without rupture. Dielectric Test: A test which consists of the application of a voltage higher than the rated voltage for a specified time for the purpose of determining the adequacy against breakdown of insulating materials and spacings under normal conditions.

Dynamic Braking Resistors, including those formerly from IPC

Our installed customer base varies from the largest Fortune conglomerates, global contract manufacturers, to the smallest of independent companies. Today Riedon employs more than team members worldwide and has manufacturing, technical support, and sales facilities in the U. Inherent to our diverse customer base are their individual and disparate needs - Riedon has created its business ethos around serving these customers efficiently and effectively regardless of their requirements. Today Riedon is dedicated to offering the best customer service and support within the resistor industry; consequently we utilize a direct to end-user methodology to ensure that our customer's needs are met effectively and efficiently.

As you search for surface mount passive components that will ensure the optimum performance of your circuit design, count on the broad line of products from KOA Speer. Our engineering teams are developing a wide range of new smaller sizes and integrated packages to accommodate higher clock speeds and product downsizing.

Today Ampcontrol is one of the leading manufacturers of Power Resistors in India. We are capable of designing and manufacturing all types of electrical resistor with various combinations of punched, formed and wire wound type for all ratings. A comprehensive quality assurance plan and adherence to international specifications ensures a durable competitively priced product which meets the customer requirements. Their unending support and hard work has enabled us in earning an extra edge on our competitors. We impart regular training to our employees to enhance their technical aspects.

Electronics/Resistors

See search results instead:. United States. The SMT Resistor Library consists of discrete-value linear models representing surface mount resistors from 10 manufacturers and a continuous linear passive models from one manufacturer. The models were extracted from data provided by these manufacturers. This section describes the schematic design of the SMT resistor library components and specifies the simulation models that are incorporated in the design. The label field appearing at the top of the component parameter dialog box contains the selected component label. The SMT resistor component represents an equivalent circuit model embedded within the netlist of the schematic design. The continuous valued SMT resistor component represents an equivalent circuit model of a thick film resistor. The single formal parameter of the subnetwork, Rnom, serves as an argument for sheet resistivity, Rs. Discrete-value optimization is not supported for continuous valued resistor components.

Quality Manufacturing

Electronic gadgets have become an integral part of our lives. They have made our lives more comfortable and convenient. From aviation to medical and healthcare industries, electronic gadgets have a wide range of applications in the modern world. In fact, the electronics revolution and the computer revolution go hand in hand.

This ITG has been written to familiarize the Investigator with one of the electronic components commonly used in medical devices. This ITG covers theory, application, and testing of the resistor and some of the design considerations that should be made when using resistors.

A resistor is a block or material that limits the flow of current. The greater the resistance, the lower the current will be, assuming the same voltage imposed on the resistor. The hydraulic analogy of a resistor would be the pipe with water flowing through it. The wider the diameter of a pipe, the higher the water flow through the pipe, assuming the same pressure difference on the terminals of a pipe.

U.S. Food and Drug Administration

Wide Range of Geometries,. Air, Oil and SF6 Environments Designed for PCB Assembly,. Coating Approved to UL94 V

SEE VIDEO BY TOPIC: RC Circuits Physics Problems, Time Constant Explained, Capacitor Charging and Discharging

The business manufactures power resistors for a number of industrial applications. Read more…. Net is the latest high resistance grounding system from Post Glover Resistors. This is the fourth generation HRG system from Post Glover and is the premier digital high resistance pulsing grounding system available. Being first a manufacturer of industrial power resistors, Post Glover has a vast array of Dynamic Braking Resistors to choose from. This allows us to offer the best possible technical and economic solution for your particular brake resistor application.

Wirewound Resistors – Construction, Pulse Load and Types

As the name indicates wire-wound resistors consist of a resistive wire wound on a bobbin and supplied with a protective coating. Since the resistance wire never can serve as a termination wire because of solderability requirements, it has to be connected to the terminal leads or the like, usually by welding or brazing. Solving a widespread pain using doEEEt, a database tool to search, select, find the corresponding specifications and the best service for your design. Of course, the winding is inductive which might be troublesome at frequencies above 50 kHz. There exist low inductance winding styles but price and dimensions then will increase.

Jump to Continuous Resistance Parts - Continuous Valued SMT Resistor Schematic In this example, the manufacturer group offers 2% parts. Customers.

Direct Current dc and Alternative Current ac In the world of electricity and electronics energy and signals are transmitted from one location to another in applications ranging from large-energy power distribution to small-signal transmission. In terms of the signal variation over time when observed at a fixed position, there is the case of the direct current dc , with which the amplitude does not change in time, and there is the alternating current ac , with which the amplitude changes sinusoidally. In the case of ac, it may be represented by a diagram with a time axis as well as by a diagram with a frequency axis. Impedance and Characteristic Impedance In the case of the alternating current, for the case of a purely resistive load R , the relationship between the voltage E and the current I applied to the load is such that their amplitudes are proportional to each other and their phases are in phase with each other.

How Electronic Components Work

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A periodic current the average value of which over a period is zero. The temperature of the surrounding coiling medium, such as gas or liquid, which comes into contact with heated parts of the apparatus. The unit of constant current which, maintained in two parallel rectilinear conductors of infinite length separated by a distance of one meter, produces between these conductors a force equal to 2x mks meter-kilogramsecond units of force per meter of length.

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.

As the name indicates wirewound resistors consist of a resistive wire wound on a bobbin and supplied with a protective coating. Since the resistance wire never can serve as a termination wire because of solderability requirements, it has to be connected to the terminal leads or the like, usually by welding or brazing. The higher the resistance value the thinner the wire that has to be used and thus the greater the risk of open circuits due to deficient weldings , damage from corrosion or from mechanical handling. Of course, the winding is inductive which might be troublesome at frequencies above 50 kHz.

AEPL have a well equipped Research and Development department consisting of experts and well qualified engineers. We as manufacturers of electrical components design our products in different dimensions. Our products are also made available to our clients in customized forms as per their specifications in various dimensions. We are client-centric approach and main aim of our company. With this concern, we follow our business strategies in achieving client satisfaction for providing finest quality products as per their requirements.

Я позвоню и все объясню. Мне в самом деле пора идти, они связи, обещаю. - Дэвид! - крикнула .

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  1. Mira

    Certainly. All above told the truth. Let's discuss this question. Here or in PM.