intertec-hess electrical components Germany intertec-hess model intertec-hess price

intertec-hess electrical components refer to the aggregate of service equipment provided for a specific group of load sources, such as trunk lines, switching devices, control systems, etc. The basic research content of traffic theory is to study the relationship between traffic volume, call loss, and bundle capacity. Therefore, the line bundle is an important basic concept in traffic theory. The load source is the service object of the line bundle, usually referring to user equipment; broadly speaking, the upper-level equipment is the load source for the lower-level equipment. In telephone communication, the load source is also called the traffic source. The number of service devices contained in the line bundle is called the bundle capacity. Figure 1 is a schematic diagram of the line bundle. The capacity of this line bundle is V, and it provides services for N load sources. Any load source initiating a call can occupy an idle service device in the line bundle.

intertec-hess electrical component classification

1, fuse resistor: Also known as a fusible resistor, it serves the dual function of a resistor and a fuse under normal conditions. When a circuit fault causes its power to exceed the rated power, it will blow like a fuse to disconnect the connected circuit. Fuse resistors generally have small resistance values and low power ratings. 4, sensitive resistor: Refers to a resistor whose resistance value has sensitive characteristics to certain physical quantities (such as temperature, humidity, light, voltage, mechanical force, and gas concentration). When these physical quantities change, the resistance value of the sensitive resistor changes accordingly, presenting different resistance values. Based on sensitivity to different physical quantities, sensitive resistors can be divided into types such as thermistors, humidity-sensitive resistors, photoresistors, varistors, force-sensitive resistors, magnetosensitive resistors, and gas-sensitive resistors. The materials used for sensitive resistors are almost all semiconductor materials, so these resistors are also called semiconductor resistors. The resistance value of a thermistor changes with temperature; if the resistance decreases as temperature rises, it is a negative temperature coefficient (NTC) thermistor. NTC thermistors are widely used and can be further divided into general-purpose NTC thermistors, voltage-stabilizing NTC thermistors, and temperature-measuring NTC thermistors. A photoresistor's resistance value changes with the intensity of incident light; when incident light increases, the resistance of the photoresistor decreases, and when incident light weakens, the resistance value increases.

intertec-hess electrical component composition

A sensor generally consists of four parts: a sensing element, a conversion element, a conditioning circuit, and an auxiliary power supply. The sensing element directly senses the measured quantity and outputs a physical quantity signal that has a definite relationship with the measured quantity; the conversion element converts the physical quantity signal output by the sensing element into an electrical signal; the conditioning circuit is responsible for amplifying and modulating the electrical signal output by the conversion element; the conversion element and the conditioning circuit generally require an auxiliary power supply.

intertec-hess electrical component structure

The simplest switch has two pieces of metal called "contacts." When the two contacts touch, they form a current loop; when they do not touch, the current path is open. When selecting contact metals, their corrosion resistance must be considered, because most metals form insulating oxides after oxidation, preventing the contacts from working properly. Selection of contact metals must also consider factors such as electrical conductivity, hardness, mechanical strength, cost, and toxicity. Sometimes, corrosion-resistant metals are plated onto the contacts. Plating is generally applied to the contact surfaces to avoid performance degradation due to oxides. Sometimes, non-metallic conductive materials, such as conductive plastics, are used for the contact surfaces. In addition to contacts, switches have movable parts that make or break the contact. Switches can be classified into lever switches, push-button switches, rocker switches, etc., based on the different movable parts, and the movable parts can also be other types of mechanical linkages.

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