NF93a-2 HESG440280R2 | ABB | Dual power load module

Description

NF93a-2 HESG440280R2| ABB | Dual power load module

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In order to improve the power supply NF93a-2 HESG440280R2 of electronic devices, including servers, the electrical equipment itself has also taken into account redundancy in the input power supply, such as using a dual power supply inlet. Is it necessary to separate the two UPS units that could have been directly connected in parallel in order to adapt to dual power supply devices? It depends on the purpose of UPS direct parallel redundancy and separation. It is obvious that the purpose of doing so is to not affect the normal operation of the load machine in the event of any UPS failure. Both methods can achieve this goal. The former has been introduced earlier, while the latter is shown in Figure 5.

Two UPS AC voltages are input to the two inlets of the electrical equipment, and the rectifiers at these two inlets rectify the input AC power into NF93a-2 HESG440280R2 , which is then connected in parallel to form a voltage at the output terminals of both and filtered. Even if the input AC voltage value is different, it doesn’t matter. If the voltage is high, it needs to output more current, which causes the load imbalance of the rectifier. Especially when a NF93a-2 HESG440280R2 is powered by a bypass, this situation is even more severe due to significant fluctuations in the mains power supply. If two UPS are directly connected in parallel without being separated, due to the stabilizing effect, this situation will not occur, and even if there is one, it will not be so large.

That is to say, even if two UPS units that can be connected in parallel are artificially separated, they still need to be connected in parallel on the equipment. Losing twice the overload capacity of UPS in vain results in a thankless outcome.

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