The data center is equipped with a UPS power supply. Why use a dual power supply?
UPS is limited in time delay, it is necessary to repair in a limited time, restore power supply, or provide manual shutdown time to the data center, which will not result in data loss.
No matter is the dual power one way, or two problems, UPS is to guarantee uninterrupted power load, with a dual power supply, is equivalent to adding a three insurance, safety factor will increase, some even, will give UPS parallel redundant, it is equivalent to 3+N insurance is basically no danger of anything going wrong.
The data center is usually the core area of information integration, must have adequate power supply, UPS power supply can only provide temporary power protection, to achieve real-time seamless power protection must be combined with double power supply, dual power is actually two different power input to the UPS, and then through the UPS to load. Double power conversion technique to now, has not yet reached zero conversion standard, but UPS, UPS is zero switching time.
