Maintenance of the DC screen system in DC screen cabinets is a crucial task that involves several key aspects, and the following are the main points to keep in mind when maintaining them:

Regular Inspection and Patrol:
The DC screen should be inspected several times on a daily basis to check all kinds of indicators, parameters and alarms to ensure that they are working properly.
Regular inspection of the charging module, monitoring module, etc., to ensure that their heat dissipation and ventilation is good.
Battery maintenance:
Keep the exterior of the battery clean, observe whether the battery is swollen, deformed or leaking, and ensure that the sealing valve is intact.
Regularly check the battery single terminal voltage, timely detection and treatment of failed batteries.
Pay attention to the ambient temperature of the battery and keep it below 40℃ to avoid aggravating the self-discharge of the battery and affecting the capacity.
System components check:
Regularly check the components of the system, paying special attention to the overheating abnormality of the SCR components and the DC melting of the contacts of the feeder switch devices.
Regularly check the functions of the DC screen system, such as even charging, floating charging, insulation monitoring, fault monitoring and alarming, etc., to ensure that the equipment is in good condition.
Connection and fastening:
Regularly check whether the connection lines are loose and tighten them in time to avoid faults caused by poor contact.
Charge/discharge test and cleaning:
Regularly do the charge/discharge test to activate the battery performance and check the battery capacity.
Regularly clean the surface of the battery, but should pay attention to the use of non-static wet cloth, avoid the use of chemical fiber cloth or harmful chemicals that are easy to generate static electricity.
Safety Protection:
When measuring voltage and current, be sure to take safety protection measures, such as wearing insulated gloves.
When overhauling, it is best to have two people working together to ensure safety.
Troubleshooting and contacting the manufacturer:
If the DC screen has a serious fault, contact the manufacturer in time to deal with it.
In the maintenance, pay attention to the fault alarm muffler off, and then restore the alarm function after troubleshooting.
In summary, the DC screen cabinet DC screen system maintenance needs to be comprehensive and detailed, involving many aspects, requiring maintenance personnel to have professional knowledge and a rigorous work attitude. Through regular inspection, maintenance and repair, can ensure the stable operation of the DC screen system, extend its service life, for the normal operation of the power system to provide reliable protection.