Explanation of power terms related to UPS power supply (4)

Explanation of power terms related to UPS power supply (4)

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

Grounding: In the power supply system, in addition to the live wire (HOTLIN) and the neutral wire (NEUTRALLIN), the pin of the middle round head is the so-called grounding pin. Also, the bigger role is to protect the user from electric shock. UPS is the main one. Some UPS will mark the voltage between the zero line and the ground line to ensure that the product will not cause electric shock to the human body.

Grounding and grounding resistance: All kinds of computer and communication equipment have grounding wires, which are connected to the general grounding wires in the computer room or power distribution room, which are called grounding wires. Grounding is to use ordinary grounding methods to lead various lines to the ground to avoid the influence of noise on the work of the equipment and to avoid hidden dangers to computer equipment. The better the continuity of the ground wire to the ground, the better the grounding effect. Ground resistance reflects 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 1 meter with a force of 1 Newton, called 1 Joule.

Poor contact: Refers to the loose connection and poor contact of the electrical connection. Poor contacts can cause voltage drops and increased losses.

Triode: There are three feet in total, usually B, E, and C. Adding a small current signal between B and E can change the current flowing between E and C, acting as a current valve and current amplification. Transistors are current mode drive devices.

Insulation resistance: refers to the degree of electrical isolation inside the equipment or between the circuit and the chassis, usually expressed in insulation resistance.

Static Switch: A device consisting of thyristors used for switching or switching compensation, enabling zero (0ms) transitions.

Reliability (MTBF): A parameter used to describe the average time that a device can function properly. The larger the MTBF, the longer the life of the device.

Ground loop (GROUNDLOOP): There are many sockets or data transmission lines inside the computer that are often used with ground wires and are connected to other ground wires, which is called "ground loop". Its function is to use the common grounding method to introduce excessive feedback current and * into the grounding to avoid line and data confusion. In addition, ground loops can also cause potential grounding in the system, reducing damage caused by computer noise.

Reliability (MTBF): A parameter used to describe the average time that a device can function properly. The larger the MTBF, the longer the life of the device.

Air switch: A current protection device that trips the switch when the current exceeds the rating of the air switch. The air switch can avoid fire caused by overcurrent in wiring or electronic equipment wiring in the building.

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

  2. The transformer itself has a heat dissipation problem and cannot block the ventilation of the power supply equipment.

Power-on inrush current: the capacitor inside the rectifier will draw a large charging current at the moment of power-on, the cathode display (CRT) needs a large demagnetization current at the moment of power-on, and the transformer has excitation current at the moment of power-on, etc., which makes the UPS in the load state , when the device is turned on, it must withstand a huge surge current.

Insoluble line switch: A current protection device, that is, when the current exceeds the rated value of the insoluble line switch (BREAKRT: commonly known as fuse switch or circuit breaker), the BREAKER will trip immediately. Exceeding the rating of the BRESKER can cause the wiring in the building or the wiring of the electronic equipment to overheat and cause a fire.

Sectional Loading: A loading device that can be quickly installed or removed.

Inverter (DC/AC): is a converter that converts direct current (DC) to alternating current (AC). In a UPS, the inverter is used to convert the energy of the battery into alternating current for use by the alternating load. The performance of the inverter is different, the output AC waveform has two types: step wave and sine wave (SINEWAVE), and the distortion coefficient (THD) is also different due to the different performance of the inverter.

Withstand voltage: refers to the higher voltage that the device can withstand