Transformer Monitoring
Enhancing Transformer Resilience: Fire Barriers and Safety Measures in Modern Substations
The Role of Transformer Oil Alternatives in Improving Safety and Environmental Sustainability
Transformer Monitoring
Zensol new instrument for OLTC testing
According to CIGRE A2.34, the dynamic resistance measurement or DRM (OFFLINE) is a test that offers diagnostics for several diverter or selector switch malfunctions such as: contact problems, broken springs, broken transition resistors, poor contact pressure, inadequate transition time, momentary open circuit, and synchronism motion issues.
Zensol’s DRM principle
Tap windings are powered with a DC voltage source. The current fluctuations are recorded during the switching process. The schematic below shows the principle of the...
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