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

intertec-hess electrical component classification

1, fuse resistors: also known as fusible resistors, they serve the dual function of a resistor and a fuse under normal conditions. When a circuit fault causes their power to exceed the rated power, they will blow like a fuse to disconnect the connected circuit. Fuse resistors generally have low resistance values and low power ratings. 4, sensitive resistors: refer to resistors whose resistance values are sensitive 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 classified into thermistors, humidity-sensitive resistors, photoresistors, varistors, force-sensitive resistors, magnetoresistors, and gas-sensitive resistors. The materials used for sensitive resistors are almost all semiconductor materials, and such 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. The resistance value of a photoresistor changes with the intensity of incident light; when the incident light increases, the resistance of the photoresistor decreases, and when the 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 signal 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 signal conditioning circuit is responsible for amplifying and modulating the electrical signal output by the conversion element; the conversion element and the signal conditioning circuit generally require power supply from the auxiliary power source.

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 the two contacts 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. When selecting contact metals, factors such as electrical conductivity, hardness, mechanical strength, cost, and toxicity must also be considered. 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 also 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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