The biggest feature of the so-called telecommunications inverter is that the DC power supply voltage is 48V, but the inverter modified from a UPS with a power supply voltage of 48V is actually not suitable for communication systems.
One: The input end of the DA series inverter has low noise. The battery pack for UPS work is used alone, and the parallel use of its battery packs is not considered. Therefore, for the UPS, the input end of the communication system, which is the most exquisite, is not considered for the back noise at the input end, and the noise at the input end is extremely large. If the battery pack of the UPS is shared with the communication system, it will cause interference and affect the quality of the call.
Second: DA series inverters have a specially designed DC buffer circuit. Normal UPS only has the design of AC snubber circuit, that is, it prevents the UPS from impacting when the AC is turned on, but it is not enough for the communication system, and it is dangerous. Because the battery pack used in the communication room has a capacity of more than several thousand AH, when the DC switch is activated, the surge generated by the battery pack can easily damage the components in the UPS and also easily consume the battery life. Therefore, it must be installed in the battery pack and reverse A buffer start circuit is added between the converters to solve the above problems.