Textbook for Operation and Maintenance Engineer of Power and Environment Specialty of Data Center - Electric work and power

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DC circuit and calculation
1.2.1 Composition of DC circuit
The path through which current flows is called a circuit. The circuit is composed of power supply (E), load (R), wire and control protection equipment, as shown in Fig. 1.2-1. Server cabinet Network cabinet Cold channel cabinet Hot channel machine room Data center micro module idc
(1) Power supply
Power supply is a device that continuously converts other forms of energy into electrical energy. For example, the battery is a device that converts chemical energy into electrical energy, and the generator is a device that converts mechanical energy into electrical energy.
The potential difference between the two poles generated by the chemical reaction inside the power supply is called the electromotive force, which is expressed by the symbol E, in volts, and expressed by the symbol V.
(2) Load
Load is the electrical equipment, its role is to convert electrical energy into other forms of energy. For example, electric lamps convert electric energy into heat energy and light energy. In addition to power supply and load, the utility circuit also includes metal conductors, on-off of control circuit, switches, contactors, fuses, relays and other protective devices to prevent circuit overload and short circuit.

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wire mesh cable tray Grid cable tray basket cable trayThe outer electrons of the atomic nucleus of the insulator have great attraction. raised floor access floor ALL STEEL PANEL CALCIUM SULPHATE PANEL ALUMINUM PANEL OA FLOOR perforated panelIt Generally, cold aisle containment hot cold aisle containment wire mesh cable tray Grid cable tray basket cable traythe voltage × The unit of ampere is called watt, so the basic unit of measurement of electric work is called watt second (Ws) and joule (J). The unit of practical time is usually expressed in hours (h), so watt hour can also be expressed in Textbook for Operation and Maintenance Engineer of Power and Environment Specialty of Data Center - Electric work and power - Classification of substances of substances cold aisle containment hot cold aisle containment wire mesh cable tray Grid cable tray basket cable traywatt hours (Wh). One degree of electricity on the watt hour meter is 1000Wh, while "thousand" is often expressed in k, so it can be written as 1kWh. For example, the power consumption of a 100 watt lamp for 10 hours is W=100 × 10=1000 watt hours=1 kWh.

Textbook for Operation and Maintenance Engineer of Power and Environment Specialty of Data Center - DC circuit and calculation depth learning server cabinet