When performing leak detection on SF6 switches, GIS combined electrical apparatus, or transformers in a substation, what factors should be considered when selecting a suitable gas quantitative leak detector? The following provides selection reference in a Q&A format based on the actual needs of on-site operation and maintenance personnel.
A: The instrument monitors the sensor head in real time through a microprocessor, and can perform approximately 4,000 signal acquisitions per second. It can promptly compensate for small fluctuating signal pulses, thereby stably detecting gas leakage concentration. After the sensor head responds, the instrument displays the result in Chinese characters and provides audible and visual signals, helping operation and maintenance personnel quickly locate the leak point.
A: Key considerations should include detection sensitivity, response time, probe type, continuous working time, and power supply method. For example, the DRD-1000 uses a handheld probe with a detection length of 1 meter, making it easy to operate in narrow spaces; the built-in rechargeable lithium battery supports both AC and DC use, with a continuous working time of about 8 hours, meeting the needs of long on-site operations. The operating ambient temperature range is -5°C to +50°C, adapting to most outdoor substation environments.
A: It is mainly suitable for leak detection of SF6 switchgear, GIS combined electrical apparatus, transformers, and other equipment. During equipment installation, after maintenance, or in daily inspections, it can perform quantitative detection on flanges, valves, pipeline connections, and other leak-prone points to assist in judging the degree of leakage.
A: It is recommended to operate in a clean and ventilated environment, avoiding strong electromagnetic interference and severe vibration. Check the battery level before use and ensure the sensor head is clean. Keep the probe moving steadily during detection to avoid rapid shaking that may affect readings. When not in use for a long time, charge it regularly to extend battery life.
