Identify the fault point How to identify the fault point of the cable without the cable fault tester Identify the fault point The value of liquidity is small, and the common problems are far behind; 4. The amount of short-speed overcurrent is the same as the power trip, and the common problems are located in the middle of the line. 5. The area of the line caused by the safety production accident is different, and the posture of the relay protection device is different. Electric water output interruption maintenance attitude trip: Electric water output interruption generally causes short-circuit faults in the large operation mode of the system. When short-circuit faults are common faults, the maintenance level is large, accounting for about 50% of the total length of the line.
When the line is in the small operation mode, the maintenance level is small, accounting for 15% to 20% of the total length of the line. Therefore, the attitude tripping of the electric water output protection device indicates that the common problem is generally located in the front-end development of the line (near the distribution station side). 6. Overcurrent flow maintenance The attitude of the equipment is tripped: the maintenance level of the overcurrent total flow maintenance is 100% of the line being maintained.
However, in general, overcurrent maintenance machines and equipment are also equipped with time-delay relays. When used in conjunction with quick-break protection devices, attitude trips are generally only caused when common problems are caused in the rear of the line. 7. Maintenance and maintenance of electric water output interruption and overcurrent flow maintenance In addition to attitude tripping: This kind of situation generally indicates that the common problem points are located at the mutual level of quick-break maintenance and overcurrent flow maintenance, and most of the common problem points are located in the middle of the line. Difficult problems After the knife switch of the distribution station trips, immediately investigate the posture of the relay protection device.
According to the posture type and characteristics of relay protection equipment and equipment, the characteristics and levels of common problems are preliminarily agreed. How to identify the cable fault point without the cable fault tester Identify the fault point Shenzhen Noyafa Electronic Technology Co., Ltd.
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