Chassis manufacturer Macase Technology explains the difference between redundant power supply and UPS power supply

 

The redundant power supply is a kind of power supply used in the server. It is composed of two identical power supplies. The chip control power supply performs load balancing. When one power supply fails, the other power supply can take over its work immediately. After that, the two power supplies work together. Redundant power supplies are designed to achieve high availability of server systems. In addition to servers, disk array system applications are also very broad.

 

RPS power supply (Redundant Power System) is used as an external DC power supply for some switches.

 

RPS can be used as a redundant backup power source for switches or routers:

 

l If the RPS and the powered device use the same AC power supply system, the RPS can continue to supply DC power to the faulty device to ensure continuous normal operation of the device.

 

l If the RPS and the powered device use different AC power supply systems, you can continue to provide DC power supply when the external AC power supply of the powered device fails. This ensures the normal operation of the device.

 

What is the difference between redundant power supply and UPS power supply?

 

    Power redundancy can generally be adopted in the form of capacity redundancy, redundant cold backup, N+1 backup of parallel current sharing, and redundant hot backup. Capacity redundancy means that the maximum load capacity of the power supply is greater than the actual load, which is of little significance for improving reliability.

 

     Redundant cold backup means that the power supply consists of multiple modules with the same function. When it is normal, one of the power supplies. When it fails, the backup module starts to work immediately. The disadvantage of this method is that the power supply has a time interval, which is easy to cause a voltage gap.

 

The N+1 backup mode of parallel current sharing means that the power supply is composed of a plurality of identical units, and each unit is connected in parallel through the OR gate diodes, and each unit supplies power to the device at the same time. This solution does not affect the load supply in the event of a power failure, but it is easy to reach all units when the load is shorted. Redundant hot backup means that the power supply consists of multiple units and works at the same time, but only one of them supplies power to the equipment, and other empty loads. The backup power supply can be put into operation immediately when the main power fails, and the output voltage fluctuates very little.

 

     For some systems that require long-term uninterrupted operation and high reliability, such as base station communication equipment, * equipment, servers, etc., a highly reliable power supply is often required. Redundant power supply design is a key part of it and plays an important role in high availability systems. Redundant power supplies are generally equipped with more than two power supplies. When one power supply fails, other power supplies can be put on immediately without interrupting the normal operation of the equipment. This is similar to the working principle of UPS power supply: when the mains power is cut off, the battery is replaced by the power supply. The difference between redundant power supply and UPS is mainly that different power supplies are powered at the same time, while UPS is one power supply and the other is ready for use at any time.