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UPS Power Supply-related Power Terms (4)
- May 02, 2018 -

Handshake: In computer communication, when two devices begin to communicate, they must understand each other's conditions and the methods used. If the two do not match, the computer will inform the user of the relevant information.



Grounding: refers to the power system, in addition to the hot line (HOTLIN) and the neutral (NEUTRALLIN), the middle circle of the PIN is the so-called ground PIN, the function of its grounding in addition to a number of yuan current or noise * into the earth In addition, the maximal function is to protect the user from electric shock, mainly by UPS, and some UPS will mark the voltage between neutral line and ground line to ensure that the product will not cause electric shock to the human body.


Grounding and grounding resistance: All kinds of computers and communication equipments have grounding wires and are connected to the general grounding wire of the equipment room or power distribution room, which is called ground wire. Grounding is the use of a common grounding method to introduce various grounding wires into the ground so as to avoid the influence of noise on the work of the equipment, and at the same time it can prevent computer equipment from being subject to hidden damage. The better the continuity of the earth to the earth, the better the earthing effect. The ground resistance reflects the continuity, and the smaller the ground resistance, the better the continuity.


Joule: The basic unit of energy is the energy required to move an object by 1 meter with a force of 1 Newton. This is called 1 Joule.


Poor contact: It refers to loose connection and poor contact at the connection part of the electrical appliance. Bad contact will lead to voltage drop and loss increase.


Transistor: A total of three legs, generally B, E, C, B, E between the application of a smaller current signal, can change the current flowing between E, C, play the role of the current valve and current amplification. Transistors are current-driven devices.


Insulation resistance: It refers to the degree of electrical isolation between the interior of the device or between the circuit and the casing. It is usually represented by the insulation resistance.


Static switch: A device composed of thyristor for switching or switching compensation, which can achieve zero (0ms) conversion.


Reliability (MTBF): The parameter used to describe the average length of time the device can work normally. The larger the MTBF, the longer the life of the device.


GROUND LOOP: Inside the computer, there are a lot of sockets or data transmission lines and other frequently used places have a ground wire, and connected to other ground wire, called "ground loop." Its role is to use the common earth line method to superfluous feedback current and * import the ground, so as not to cause the line and the data of the disorder. In addition, the ground loop is more involved in the introduction of the ground lurking in the system, reducing the damage caused by the computer due to noise.


Reliability (MTBF): The parameter used to describe the average length of time the device can work normally. The larger the MTBF, the longer the life of the device.


Air switch: A current protection device that will trip when the current exceeds the air switch specification rating. The air switch prevents overcurrents in the lines or electronic equipment in the building that cause fires.


1. The efficiency and safety of the transformer are very important, depending on the material and the processing technology.


2. There is a problem with heat dissipation in the transformer itself, so ventilation of the power supply equipment must not be hindered.


Start-up inrush current: The capacitor inside the rectifier draws a large charge current during the moment of starting. Cathode display (CRT) needs a large demagnetizing current at the moment of starting, the transformer has excitation current at the moment of starting, etc., making the UPS in the load. The device must withstand large inrush currents when it is turned on.


No-wire switch: A current protection device that breaks out when the current exceeds the rating of a non-dissolving switch (BREAKRT: what the average family calls a fuse switch or circuit breaker). Exceeding the BRESKER rating can result in overheating of lines or electronic equipment in the building.


Stage load: A load device that can be quickly built or removed.


Inverter (DC/AC): An inverter that converts direct current (DC) to alternating current (AC). The UPS utilizes an inverter to convert the battery's energy to an alternating current for use in an AC load. The performance of inverters varies, and there are two types of AC waveforms: staircase wave and SINEWAVE. The distortion factor (THD) also varies with the performance of the inverter.


Pressure resistance: refers to the device can not allow live parts (such as the shell, panel) and live parts can withstand the highest voltage, higher than the pressure will cause breakdown. Insulation and pressure resistance are critical to personnel safety.


Cold start: The UPS is started when there is no utility power, and some UPSs cannot start up at this time.