Inverter emergency power inverter supply capability test is a verification method of providing DC power to the inverters to ensure that the required emergency power supply capability of the inverters can be achieved when the emergency power supply mode of the inverters is running. During the test, the main power supply is cut off to make the emergency power supply work in the emergency power supply mode. Under the condition that the voltage of the intermediate DC circuit is not lower than the rated value, the resistance load with the same capacity is applied at the output end, and the time duration of the output power is measured and recorded during the operation of the equipment. It should not be shorter than the prescribed emergency power supply time. For equipment using only batteries (batteries) as DC power supply, this test can be omitted after the previous test.
Batteries (batteries) are used as emergency power supply for DC inverters. Energy recovery time test is needed. During the test, the battery (group) is discharged to make its voltage lower than the cut-off voltage, the emergency power supply is connected to the main power supply that meets the requirements, and the built-in charger of the emergency power inverter supply is charged automatically with constant current. At this time, the initial charging current should be measured in accordance with the charging specifications stipulated by the battery (group) supplier. Constant current requirement. The time required for charging should meet the stipulated time, that is, the time required for the emergency power supply with the capacity of 100 kW or less should not exceed 24 hours, and the time required for the emergency power supply with the capacity of 100 kW or more should not exceed 72 hours. To disconnect the charging circuit of the battery (group) and measure the charging voltage, it should meet the constant voltage requirements of the battery (group) supplier’s charging specifications. If necessary, the charge can be verified by the re-discharge test.
Through the corresponding method, power inverter after the test, check whether the built-in charger has the required functions according to the requirements. If it is an external charger, the test of the charger shall be carried out according to the corresponding standards, but for the charging function of the batteries (batteries) of the inverter emergency power supply, it shall be carried out in accordance with the provisions of this standard.
POWER INVERTER 