EZR electrical components Germany EZR model EZR price

EZR 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 trunk bundle is an important basic concept in traffic theory. A traffic source is the service object of the trunk 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. The number of service devices contained in the trunk bundle is called the bundle capacity. Figure 1 is a schematic diagram of the trunk 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.

EZR electrical component classification

For different application scenarios, the purpose of using varistors, and the voltage/current stress applied to the varistors, are not the same; therefore, the requirements for varistors also differ. Paying attention to these differences is very important for correct usage. According to different purposes, varistors can be divided into two main categories: varistors for protection, and varistors for circuit functions. ① Varistors for protection: 1, distinguish between varistors for power supply protection and those for signal line or data line protection, as they must meet the requirements of different technical standards. 2, according to the different continuous operating voltages applied to the varistor, varistors across power lines can be divided into two types: AC type and DC type. The aging characteristics of varistors under these two voltage stresses are different. 6, according to the different abnormal overvoltage characteristics withstandable by the varistor, varistors can be divided into three types: surge suppression type, high-power type, and high-energy type. ② Surge suppression type: refers to varistors used to suppress transient overvoltages such as lightning overvoltage and switching overvoltage. The occurrence of this transient overvoltage is random and non-periodic, and the peak current and voltage may be very high. The vast majority of varistors belong to this category. ③ High-power type: refers to varistors used to absorb continuous pulse trains that occur periodically, such as varistors connected in parallel to switching power supply converters. Here, the impulse voltage occurs periodically, and the period is known. The energy value can generally be calculated. The voltage peak is not large, but due to the high frequency of occurrence, its average power is quite significant. ④ High-energy type: refers to varistors used to absorb magnetic energy in large inductive coils such as generator excitation coils and lifting electromagnet coils. For such applications, the main technical indicator is energy absorption capability. The protective function of varistors can be repeated many times in most application scenarios, but sometimes they are made into one-time protective devices like current fuses. For example, varistors with short-circuit contacts connected in parallel to the loads of certain current transformers.

EZR electrical component composition

A multimeter consists of three main parts: the meter head, the measurement circuit, and the selector switch. The multimeter is the most basic tool in the field of electronic testing and is also a widely used test instrument. The multimeter is also called a multi-meter, triple-meter (A, V, Ω, i.e., current, voltage, and resistance), multiplex meter, or universal meter. Multimeters are divided into analog multimeters and digital multimeters. There is also an oscilloscope multimeter with oscilloscope functions, which is a multifunctional, multi-range measuring instrument. General multimeters can measure DC current, DC voltage, AC voltage, resistance, and audio levels. Some can also measure AC current, capacitance, inductance, temperature, and some parameters of semiconductors (diodes, transistors). Digital multimeters have become mainstream and have replaced analog instruments. Compared with analog instruments, digital instruments have high sensitivity, high accuracy, clear display, strong overload capacity, are easy to carry, and are more convenient and simple to use.

EZR electrical component performance

The performance of fiber optic connectors primarily involves optical performance; additionally, factors such as interchangeability, repeatability, tensile strength, temperature, and mating cycles must be considered. 1. Optical performance: The requirements for the optical performance of fiber optic connectors mainly focus on two basic parameters: insertion loss and return loss. Insertion loss, also known as connection loss, refers to the loss of effective optical power in the link caused by the introduction of the connector. The smaller the insertion loss, the better; it is generally required to be no greater than 0.5dB. Return loss refers to the ability of the connector to suppress the reflection of optical power in the link, and its typical value should be no less than 25dB. For connectors in practical applications, the ferrule surface undergoes specialized polishing treatment, which can increase the return loss, generally not lower than 45dB. 2. Interchangeability and repeatability: Fiber optic connectors are universal passive components. For the same type of fiber optic connector, they can generally be combined arbitrarily and reused multiple times. The additional loss introduced thereby is generally within the range of less than 0.2dB. ③ Tensile strength: For assembled fiber optic connectors, the tensile strength is generally required to be no less than 90N. ④ Temperature: Generally, fiber optic connectors must operate normally within a temperature range of -40oC to +70oC. ⑤ Mating cycles: Fiber optic connectors in use can generally withstand more than l007 mating cycles.

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