< p> UPS
power supply is a common emergency power supply system, the grid under the condition of normal and abnormal mains, work is also different, the following four works of UPS power supply: run normally, battery, bypass and bypass operation maintenance work.
< / p> < p> 1, the normal operation mode < / p> < p> UPS power supply system of power supply principle is when the mains is normal, the machine will be mains alternating current into direct current, and then to the battery, in case of power failure when using;
Is important to emphasize uninterruptible power supply
systems would work, is not of a power failure when the voltage is too low or too high, the instant surge, etc. , affect the normal operation of equipment, power quality, UPS system is in working status, providing stable and clean power for load devices.
< / p> < p> 2, bypass operation < / p> < p> when a power overload on-line UPS, and bypass command (
Manual or automatic)
, inverter overheat or machine fault, UPS power supply
general inverter output to bypass the output, or directly by the mains power supply.
Due to bypass the UPS output frequency phase with the mains frequency phase, so the phase-locked synchronization technology to ensure the UPS power output and the grid synchronization.
Bypass switch bidirectional thyristor parallel operation mode, can solve the problem of the bypass switch time, truly the zero time switch, control circuit is complex, generally used in high-power UPS power supply.
Such as UPS overload, it must be artificially reduce the load, or bypass breaker will automatically cut off the output.
< / p> < p> 3, battery works < / p> < p> once the mains when an exception occurs, will be stored in the storage battery dc into alternating current (ac), the inverter input shifted to battery supply, inverter power continuously, supply load continue to use, to achieve continuous power supply function.
power supply system of power source is battery and battery capacity is limited, so don't like the city of the UPS power constant supply of electricity, so no matter how much capacity of the uninterrupted power supply system, in its full load condition, the power must be limited time to extend the time of discharge, to buy the long time delay UPS power supply.
< / p> < p> 4, bypass maintenance way < / p> < p> when repairs to UPS power supply, through the manual bypass to ensure normal power load equipment, after the maintenance operation is completed, restart the UPS power supply, UPS power supply at this time to normal operation.
< / p> < p> < / p>
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