How the UPS power supply sounded
Landlord description is not clear enough.
1, the UPS itself is working, fans, inductors, transformers will have sound, as long as not very sharp, it should be no problem.
2, UPS work, as long as there is an alarm (general time, a major failure), etc., there will be a buzzer called. General slowing is a small fault (which can be automatically restored), euphemism is a large failure (recoverable), long only general failure.
Look at the contactor is not inside the contact is not good
The reasons are as follows:
The machine itself has a certain noise, the environment clean point of the maintenance of a small noise point. If there is a sound alarm that there are many cases, power failure after the battery, voltage instability caused by battery power supply, as well as machine failure will have alarm and so on.
UPS is an uninterruptible power supply, is a kind of energy storage device, inverter as the main component of the constant voltage constant frequency uninterruptible power supply. Mainly for a single computer, computer network systems or other power electronic equipment to provide 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) , UPS immediately put the battery power, through the inverter conversion 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 devices are usually protected against excessive voltage and low voltage.
