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Question:

What is the difference between DC and UPS?

I would like to do waste heat power generation project, DC screen installed in the first floor of the high-pressure room, UPS installed in the third floor of the control room, if the normal power failure, UPS will supply the computer system, DC battery is not inside the battery power supply ah? Is the UPS and DC screen a common battery?

Answer:

Yes, the role of the DC screen is when the power supply interruption through the dual power switch to quickly provide a reliable backup power, as well as the supply of high-voltage switch operation power. UPS is the role of DC power into AC power supply to DCS or other devices such as computers.
2, the principle is different; DC screen is the rectifier rectifier for the external load power supply; UPS principle is the first AC rectifier for the DC, and then through the inverter unit, the DC inverter AC power supply for the external load. Both in the mains failure, are by the battery pack external power supply. DC screen debugging, connected to the AC power supply test AC dual power switching device is working properly, dual power switch device under the port voltage is normal. After the AC part of the test is normal, close the AC module of the charging module in turn to observe whether the module starts normally and measure the module output voltage and polarity. After the charging module starts normally and the output voltage and polarity are correct, turn on the battery switch and the bus switch to measure whether the voltage, polarity and polarity of the battery switch are correct, and observe whether the voltage meter is in the direction. turn. UPS (Uninterruptible Power System), that is, uninterruptible power supply, is the battery (mostly lead-acid maintenance-free battery) connected with the host, through the host inverter and other modules to convert DC power into the main system equipment The Mainly used for a single computer, computer network systems or other power electronic equipment such as solenoid valves, pressure transmitters, etc. to provide a stable, uninterrupted power supply. When the mains input is normal, the UPS will be powered by the mains supply to the load, this time the UPS is an AC mains regulator, and it also charge the battery to the machine; when the electricity interruption (accident power failure) , The UPS immediately to the battery DC power, through the inverter zero switching method to continue to supply 220V AC load, so that the load to maintain normal work and protect the load soft, the hardware is not damaged. UPS equipment is usually too high voltage or voltage can provide protection.
DC screen and UPS difference is: 1, the application of different occasions; DC screen is mainly for the switchgear, integrated protection devices to provide operating power or control power; UPS is mainly to the engine room, computers and other backup power supply.

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