Wuhan where transformer core grounding monitoring system

Wuhan where transformer core grounding monitoring system I. Introduction OMC3030 transformer core grounding monitoring system suitable for installation in 110kV and above voltage substation transformer core grounding line. The use of high sensitivity current sensor, without distortion collect core earth leakage current signal, current signal by computing and processing, eliminate clutter signal, and the actual earth leakage current information. The system uses wireless RF communication network measured data to the concentrator, and then via the fieldbus transfer of data to the background software, end-use expert system analysis, judgment, forecasting transformer core insulation health. Second, the technical characteristics of electrical equipment without changing the original wiring, grounding mode, monitoring systems and electrical systems only magnetic contact, without causing any disturbance and impact on the primary system fully into account the harsh electromagnetic environment field, to take comprehensive measures to curb and perfect shielding sensor housing and the cable cores using the new magnetic materials, high-performance system self-calibration feature unique within the period specified, active alignment due to aging, temperature changes caused by hardware circuit system uses error wireless RF communication network measured data to the concentrator Each concentrator can access up to 32 monitoring sites collect information on three categories of technical performance parameters Power solar power 8VDC / 187 ~ 242VAC power supply equipment: maximum instantaneous power consumption of 500mW, standby power 50mW measurement range and accuracy 1.0-1000mA Resolution: 0.5mA Accuracy: ± 2% of communication wireless RF433MHz, RS232 / RS485 / IEC61850 working environment temperature -40 ~ + 70 ℃ humidity ≤90% RH