OM.R902 Transformer Core/Clamp Grounding Current Online Monitoring System

Product Overview
The OM.R902 Transformer Core/Clamp Grounding Current On-Line Monitoring System continuously tracks the ground leakage current of transformer cores and clamps. Utilizing an industrial fieldbus, it enables fully digital communication across the entire substation, while on-site monitoring IEDs facilitate data exchange with remote monitoring platforms. This system allows real-time assessment of the transformer's insulation condition, providing insights into the rate of insulation degradation in the core and clamps—and thereby addressing the limitations of traditional insulation resistance measurements for these components. Ultimately, it supports real-time online analysis and diagnostics of transformer equipment operation, offering critical data to guide timely maintenance and repairs.

System Architecture
The transformer core/clip monitoring unit is deployed directly on the transformer equipment itself and connected via communication cables to the core/clip monitoring IED module. This IED module enables real-time data acquisition and processing, consolidating information reflecting the operational status of the transformer into standardized data messages compliant with the DL/T860 protocol, which are then uploaded to the higher-level data server. Meanwhile, the expert diagnostic system for the transformer core/clip receives the data transmitted by the IED, analyzes the equipment's operating condition, assesses its health status, diagnoses any potential faults, and ultimately develops targeted maintenance strategies.

Advantageous Features
● High-precision single-turn core-type zero-flux sensor with strong anti-interference capability
● All-digital, integrated on-site intelligent monitoring unit
● Advanced hardware platform technology
● A truly hierarchical and distributed system architecture
● Optimized system design, comprehensive online monitoring system solutions, and effective early warning features
● Monitoring data can be sent to the data analysis and diagnosis system deployed in the provincial-level network.
● Information reports can be automatically generated in default mode, allowing users to easily edit them. Multiple user terminals can access relevant information based on their respective permissions. The lower-level device can store monitoring records for more than 3 years, and data remains intact even in the event of a power outage.

System Parameters

On-site Case

State Grid Anhui Longhu 220kV Substation		Guangdong Overseas Chinese Town ±800kV Converter Station of the Southern Power Grid