Integrated On-line Monitoring System for Transformer (Reactor) PD

The transformer (reactor) PD on-line monitoring system integrates vibration sensor, HFCT (high frequency PD sensor), AE (ultrasonic sensor), UHF (UHF PD sensor) and radio frequency PD sensor. The system can provide user guidance and analysis conclusions by comprehensively analyzing various dynamic operating data and static data, using fault assessment models and experience databases. The transformer (reactor) integrated monitoring system can provide interfaces for data interaction with the core and clamp grounding current monitoring system, winding optical fiber temperature measurement system, transformer neutral point grounding monitoring and other devices.

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SF6 gas leakage alarm device

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Transformer Neutral Point DC Bias Monitoring System

On-line monitoring of DC magnetic bias at the neutral point of the transformer can monitor the noise and vibration of the neutral point of the transformer and the transformer body in real time, so as to realize real-time monitoring of the operation status of the transformer equipment. At the same time, potential faults of the transformer can be found in time by analyzing the monitoring data and provide important data basis for condition-based maintenance. Once the DC at the neutral point of the transformer or the vibration of the transformer body exceeds the standard, the standard, the operator can take timely measures, to prevent major accidents of transformers and systems, it provides a strong and reliable guarantee for the safe, reliable, stable and economical operation of the power system.

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LHRX1908 substation integrated online monitoring system/capacitive equipment online monitoring system

The LHRX1908 substation integrated on-line monitoring system adopts a hierarchical and distributed field bus structure and consists of a monitoring system installed in the substation and a data management system installed at the user end. It can implement on-line monitoring and diagnosis of the insulation status of high-voltage electrical equipment such as CT, CVT, coupling capacitors, bushings, and lightning arresters. Users can collect the monitoring data of several substation monitoring systems to the data management and diagnosis center through the LAN.

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On-line Monitoring System of Transformer Core Grounding Current

The LHTX1306B transformer core/clamp grounding online monitoring system captures instantaneous current changes online in real time, and sends out alarm signals through analysis and judgment to provide accurate and direct judgment basis for operators to assist operators to eliminate core/clamp grounding faults in time. The stored historical data provide basis for condition-based maintenance, evaluation, early warning and risk analysis of transformers, and are powerful tools to ensure safe operation of transformers.

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On-line Monitoring System of Lightning Arrester

Metal zinc oxide arrester is one of the key equipment of power equipment, the leakage current flowing through the arrester is an important index to measure the insulation degree of the arrester. The JCQ-485 series arrester on-line monitoring device can realize real-time monitoring of the insulation condition of the arrester through real-time on-line monitoring of the full current, resistive current, lightning strike times and lightning strike time of the arrester. At the same time, the potential failure of the metal zinc oxide arrester can be found in time by analyzing the monitoring data, which provides an important maintenance basis for the condition-based maintenance. According to the needs of the field, this product is designed for the remote meter type and sensor type two specifications.

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LHJYJC DC Insulation Intelligent Monitoring System

LHJYJC type DC insulation intelligent detection system, using non-contact intelligent magnetic modulation DC micro-current sensor, by detecting the DC system positive and negative bus grounding leakage current and the voltage of the bus to the ground, using a unique algorithm to measure the two ends of the bus at the same time to the ground resistance, so as to distinguish the grounding fault of the bus. This technology does not need to superimpose any signal on the bus, will not have any adverse effects on the DC system power supply, completely eradicate the bus double-end insulation drop, as well as the bus to ground distribution capacitance caused by misjudgment and leakage, and at the same time greatly improve the accuracy and speed of detection; it is an ideal equipment for detecting insulation resistance.

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On-line Monitoring and Compensation Device for Grounding Current of Transformer Core

Due to the floating position between the core and the earth, there will be a ground current. Under normal circumstances, this current value is very small, and the transformer core multi-point grounding, it will form a loop between the core and the earth, then the grounding current will increase many times, will endanger the normal operation of the transformer. One is to cause local short-circuit overheating of the iron core, which will cause local burning or damage of the winding of the iron core in severe cases, resulting in inter-turn or inter-phase fault; The second is to cause local overheating of the transformer and discharge fault due to circulation of the grounding wire of the iron core. LHTX1306B-RS series iron core/clamp intelligent cutting device is designed by Changsha Lanhong to provide overcurrent protection for iron core/clamp. It is divided into manual cutting and manual self-integrated cutting. The protection network is divided into three levels of switching, which can be switched according to the current size. If the measured current is greater than a certain value, a first-level resistor network can be put into the measured circuit to reduce the current value and achieve the purpose of protection; when the measured current returns to normal, the input resistor network can be withdrawn.

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