Views: 203 Author: Site Editor Publish Time: 2021-05-18 Origin: Site
In the distribution network system, there are many line branches, complicated operation modes, and heavy line management and maintenance workload. When a fault occurs, the query is time-consuming and laborious, and the power supply reliability is low. The fault indicator can make up for the shortcomings of the above-mentioned transmission and power failure query, save time and effort, and provide a powerful guarantee for quickly finding an electrical short or other fault point and quickly restoring the power supply.
With the development of technology, the line fault indicator has continuously improved its technological content and has a wide variety of products. According to the different characteristics of transmission and distribution lines, there are corresponding products of various specifications and models, mainly including: cable short circuit fault indicator, short circuit and earth fault indicator, panel type fault indicator, overhead line fault indicator, high voltage line fault indicator. Next, let's take a look at the working principle of the overhead line fault indicator.
The overhead fault indicator is easily installed on the overhead power line through an insulating rod according to single-phase or three-phase applications. The fault indicator is built-in with a highly integrated microprocessor, which continuously samples the load current in the system, and according to its sampling The current value is automatically adjusted.
After a fault occurs, the fault indicator flashes with a red light to indicate a permanent fault. Subsequently, the fault passage indicator for overhead lines enters a two-minute latch mode, allowing reclosing and switching actions. After two minutes, the fault indicator will detect the system voltage and load current to determine whether it is a transient fault or a permanent fault. If it is a transient fault, the system voltage and system load current will reset. Otherwise, the red light indicating a permanent fault will be displayed for 4 hours or 8 hours according to the current before the fault. The photoelectric sensor is built into the fault indicator to detect natural light conditions. In the day mode, the two front lights flash at the maximum brightness to indicate permanent faults. In the night mode, the brightness of these two lights is reduced to save energy.
In this mode, a set of built-in lights light up the transparent housing of the entire indicator at the same time, and the visibility is guaranteed to be more than 1000 inches away from the indicator, and it can adapt to a 360-degree angle. The pulse adjustment circuit of the light flashing optimizes the brightness and battery life. The product is easy to install and can quickly help maintenance personnel find faulty lines, thereby shortening the fault discovery time by more than 50%, and greatly reducing the losses caused by faults in the power and industrial systems. Applied to overhead lines, instantaneous faults provide eight hours of fault indication, allowing line staff to troubleshoot faulty line sections, investigate lines that automatically clear faults and lines that successfully reclose after tripping, and improve the reliability of power supply.