{"id":3089,"date":"2026-07-10T23:21:44","date_gmt":"2026-07-10T15:21:44","guid":{"rendered":"http:\/\/www.weissmanwonders.com\/blog\/?p=3089"},"modified":"2026-07-10T23:21:44","modified_gmt":"2026-07-10T15:21:44","slug":"how-do-partial-discharge-sensors-work-in-transformers-45d3-8ada2c","status":"publish","type":"post","link":"http:\/\/www.weissmanwonders.com\/blog\/2026\/07\/10\/how-do-partial-discharge-sensors-work-in-transformers-45d3-8ada2c\/","title":{"rendered":"How do partial discharge sensors work in transformers?"},"content":{"rendered":"

Partial discharge (PD) is a critical issue in transformers that can lead to insulation degradation and ultimately, equipment failure. As a leading supplier of partial discharge sensors, I’ve witnessed firsthand the transformative impact these sensors have on transformer health monitoring. In this blog, I’ll delve into how partial discharge sensors work in transformers, highlighting their importance and the benefits they offer. Partial Discharge Sensor<\/a><\/p>\n

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Understanding Partial Discharge in Transformers<\/h3>\n

Before we explore how partial discharge sensors work, it’s essential to understand what partial discharge is and why it’s a concern in transformers. Transformers are crucial components in electrical power systems, responsible for transferring electrical energy between circuits through electromagnetic induction. The insulation system within a transformer is designed to prevent the flow of current between conductors and the transformer’s enclosure. However, over time, this insulation can degrade due to various factors such as electrical stress, thermal stress, mechanical stress, and environmental conditions.<\/p>\n

Partial discharge occurs when the electrical field within the insulation exceeds its dielectric strength in a localized area. This causes a small, momentary discharge of electricity, which can erode the insulation material and lead to the formation of voids, tracking, and other forms of damage. If left undetected, partial discharge can progress and eventually cause complete insulation failure, resulting in costly downtime, equipment damage, and potential safety hazards.<\/p>\n

How Partial Discharge Sensors Work<\/h3>\n

Partial discharge sensors are designed to detect and measure the electrical signals generated by partial discharges within a transformer. These sensors are typically installed on or near the transformer and are connected to a monitoring system that analyzes the sensor data to determine the presence, location, and severity of partial discharge activity.<\/p>\n

There are several types of partial discharge sensors available, each with its own unique operating principle and advantages. The most common types of partial discharge sensors used in transformers include:<\/p>\n