What if the UPS crashes?

Generally, the problem with on-line UPSs is that the inverter is not capable of producing the appropriate voltage or frequency in the UPS output terminals and the results of this failure may vary between different models.

Usually, as soon as a fault occurs, the Control Logic unit detects a UPS fault in the output or frequency and immediately sends a signal to the static switch control system to interrupt the load as shown in the figure without interruption. Transfer it to the bypass in the required electricity. But if there is no synchronous (bypass) synchronous bypass current when the inverter output needs to be performed, there may be a short interruption in the load supply.

It is only under such conditions that a single on-line UPS interrupts its power consumption (very short).

It is important to note that although there is no uninterrupted transmission to the bypass path at the output load, the load is supplied with unstable voltage and if this is necessary due to UPS failure and the bypass path input power is also required. If it is cut off, then it completely loses its nutritional burden.

Usually, when an inverter problem is resolved, the static switch automatically connects the load to the inverter output, often called an auto-retransfer.

The response of an on-line system to overload is usually similar to the failure mode of the UPS, in which case it remains in the bypass path until it is overloaded and then automatically connected to the inverter output. If there is no overpass mode during the overload mode, the UPS will also be cut off, so in some systems it may be possible to maintain the overload status for a limited time using the inverter power. This means that the UPS can supply enough current for the part of the load that is having trouble to automatically disconnect the circuit breaker from the UPS.

The inverter is in the limiting state until the UPS is operating under overload conditions and its output voltage may be deliberately “reduced” (in most cases it is better to cut off electricity completely) and if the overload is fixed at a specified time. The machine returns to normal.