| 摘要 |
The present invention relates to a system for optimally shifting a load between a commercial power source and an emergency generator. According to the present invention, the system comprises a commercial-power switch (120), an emergency generator (G), a generator switch (130), a generator-power detection part (143), a load-power detection part (145), and an MCU (110). The MCU (110) outputs a control signal for turning on the generator switch (130) while the commercial-power switch (120) is turned on and a commercial power source supplies power to a load (L); monitors load power; outputs a control signal for turning off the commercial-power switch (120) if a monitored load power value is less than a first reference value compared to the generation capacity of the emergency generator; monitors an increasing output value of the emergency generator if the monitored load power value is equal to or greater than the first reference value compared to the generation capacity of the emergency generator; and by referring to the increasing output value of the emergency generator, outputs a control signal for turning off the commercial-power switch (120) when a load power value, which needs to be covered by the emergency generator, becomes less than the first reference value compared to the generation capacity of the emergency generator, thereby shifting the load (L) from the commercial power source to the emergency generator. According to the present invention, the emergency generator is not shut down, and the load can be shifted at an optimal switching point. |
