By hvhipot 
In places with power systems, it is necessary to install relay protection devices to ensure safer and more efficient operation of the power system, which helps prevent losses caused by power system failures. However, as HV Hipot Electric Co., Ltd. requirements for the operational efficiency of the power system become increasingly high, the pressure on relay protection devices is also increasing, making it easy for faults to occur. So, how should we maintain the power system?
If we want to strengthen the operation and maintenance of relay protection, we first need to understand the characteristics of relay protection devices so that they can meet basic operational requirements. The main characteristics of relay protection devices are as follows:
1. Reliability
The reliability characteristics of relay protection devices are their main features. When a fault occurs during the operation of the power system, the relay protection device will make reliable actions within its protection range to effectively disconnect the expansion of the fault point.
2. Selectivity
When there is a fault in the power system operation, the relay protection device will selectively cut off the fault, promptly disconnect the switch equipment closest to the fault point, and enable other parts except for the faulty part of the power system to continue normal operation. Sensitivity. The sensitivity of relay protection devices can be measured by the oversensitivity coefficient, which refers to their ability to respond to abnormal situations or operational faults within the protection range.
3. Quickly
When a system failure occurs, the relay protection device can respond at the fastest speed allowed, promptly disconnect the switch equipment, ensure that the fault does not spread and expand, and also play a good role in reducing the degree of damage to faulty components, laying the foundation for the safe and stable synchronous operation of the power system after fault elimination.
To improve the reliability of relay protection, effectively ensure the safe and stable operation of the power system, and timely and reliable action in case of faults, it is necessary to regularly inspect and verify the relay protection devices and their secondary circuits. The verification content of relay protection devices mainly includes the inspection of the entire set of protective device actions, electrical characteristic tests and mechanical part inspections of relay protection, secondary power on tests, measurement of opening voltage and secondary circuit insulation resistance.
The main inspection content of relay protection devices and their secondary circuits is to ensure the integrity, effectiveness, and reasonable storage of the protection setting table, to ensure the normal operation of relay protection, and to check whether the power supply and related LCD panels and indicator lights display normally. Whether the device and equipment are normal and accurate, check whether the AC sampling and information input of the equipment are normal, check the position of the conversion switch and pressure plate, and ensure that there is no odor or abnormal noise during operation.