A, hot standby:
1, advantages: help to improve the reliability and robustness of the system operation; for example, in the storage, hot standby is used to replace the faulty disk in the RAID configuration; hot standby has a better power supply continuity.
2, disadvantages: bus, transformers, reactors, capacitors and lines and other electrical equipment, such as hot standby means that all sides of the connection to the equipment are no safety measures; to pay more economic costs.
Two, cold standby:
1, the advantages: shorten the boost time, reduce fuel consumption, reduce heat loss, maintain the boiler water level.
2, disadvantages: than to take anti-corrosion measures, to drain all the furnace water.
Extended information:
When a dual power supply is used and the power supply is cold standby, if the main power supply failure If there are particularly important loads in the primary loads of the building, and loads with higher requirements for interruption of power supply time (e.g., data centers, medical emergency equipment, some firefighting loads, etc.), the cold standby may not meet the requirements. At this time, should be based on the actual situation, in addition to dual power supply, but also need to set up standby power or emergency power.
The hot standby of the circuit breaker itself is in the disconnected position, the disconnecting switches on each side are in the closed position, and the equipment relay protection and automatic devices meet the requirements for energization.
Baidu Encyclopedia - Hot Standby
Baidu Encyclopedia - Cold Standby