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 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 upstream equipment is the traffic source for the downstream 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 applying varistors and the voltage/current stress acting on them vary; therefore, the requirements for varistors also differ. It is very important to distinguish these differences for correct use. According to different purposes, varistors can be divided into two categories: protection varistors and circuit-function varistors. ① Protection varistors: 1. Distinguish between power supply protection and signal line or data line protection varistors, as they must meet different technical standard requirements. 2. According to the different continuous operating voltages applied to the varistor, varistors across power lines can be classified into AC type or DC type. The aging characteristics of varistors under these two voltage stresses are different. 6. According to the different abnormal overvoltage characteristics withstand by varistors, they can be classified 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 such transient overvoltages 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 groups that appear periodically, such as varistors connected in parallel to switching power supply converters. Here, the impulse voltage appears periodically, and the period is known. The energy value can generally be calculated. Although the peak voltage is not large, the average power is considerable due to the high frequency of occurrence. 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 capacity. 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 multi-function, 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 main requirements for the optical performance of fiber optic connectors are insertion loss and return loss, which are the two most basic parameters. 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. Lower insertion loss is better, and 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 achieve higher return loss, generally no less 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 at temperatures ranging from -40oC to +70oC. ⑤ Mating cycles: Most fiber optic connectors in use can withstand more than l007 mating cycles.

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