linsheng analysis: After the battery (group) voltage is lower than the cut-off voltage, the main power supply that meets the requirements is restored, and the emergency power supply automatically charges the battery (group). The initial charge current should be measured in accordance with the charging requirements specified by the battery supplier. The time required for charging should be in accordance with the regulations. Disconnect the battery (group) charging circuit and measure the charging voltage, which should meet the constant voltage requirements specified by the battery supplier. If necessary, it can be verified by a re-discharge test.
After the test, the charger should be inspected according to the national regulations.
The ability of the DC power supply to provide inverter operation and the power supply of the DC power supply in the inverter emergency power supply are crucial. The standard stipulates verification and assessment from the following aspects.
The emergency power supply time test is to verify whether the battery (group) as the energy storage device can meet the DC power supply requirement when the inverter emergency power supply is in the inverter emergency power supply mode. Before the test, first confirm that the battery (group) is fully charged. Otherwise, the battery (group) should be fully charged in the normal operation mode according to the corresponding charging specification and not less than the specified energy recovery time. At this time, a resistive load equal to the rated capacity is applied to the output terminal, the main power source is cut off, and the inverter is operated to the inverter emergency operation mode. At the beginning of the inverter emergency operation mode, the output voltage should be the specified value, and the running time record of the inverter emergency power supply from the start of operation to the shutdown should be recorded. The running time should not be shorter than the specified emergency (storage) power supply time.
When the specified energy storage time is reached, the voltage of the measuring battery (group) should not be lower than the cut-off voltage.
In the standard, there is a description of this test for new batteries. Due to the characteristics of the battery, the new battery will not reach the full capacity after the initial charge, and the storage power supply time will not meet the specified requirements. In the case, after a reasonable energy recovery (recharge) time is allowed, the test is repeated. This situation may have to be repeated several times until the requirements are met.
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After the test, the charger should be inspected according to the national regulations.
The ability of the DC power supply to provide inverter operation and the power supply of the DC power supply in the inverter emergency power supply are crucial. The standard stipulates verification and assessment from the following aspects.
The emergency power supply time test is to verify whether the battery (group) as the energy storage device can meet the DC power supply requirement when the inverter emergency power supply is in the inverter emergency power supply mode. Before the test, first confirm that the battery (group) is fully charged. Otherwise, the battery (group) should be fully charged in the normal operation mode according to the corresponding charging specification and not less than the specified energy recovery time. At this time, a resistive load equal to the rated capacity is applied to the output terminal, the main power source is cut off, and the inverter is operated to the inverter emergency operation mode. At the beginning of the inverter emergency operation mode, the output voltage should be the specified value, and the running time record of the inverter emergency power supply from the start of operation to the shutdown should be recorded. The running time should not be shorter than the specified emergency (storage) power supply time.
When the specified energy storage time is reached, the voltage of the measuring battery (group) should not be lower than the cut-off voltage.
In the standard, there is a description of this test for new batteries. Due to the characteristics of the battery, the new battery will not reach the full capacity after the initial charge, and the storage power supply time will not meet the specified requirements. In the case, after a reasonable energy recovery (recharge) time is allowed, the test is repeated. This situation may have to be repeated several times until the requirements are met.
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