Bushing Potential Devices (BPD Units) are essential transformer accessories used to safely convert high-voltage signals into low-voltage outputs for monitoring, protection, and control systems. Installed on transformer bushings, these devices function as capacitive voltage dividers—delivering a voltage signal proportional to the line-to-ground voltage for use in relays, meters, and diagnostic equipment. At Parts Super Center, we supply a wide range of Bushing Potential Device units engineered for accuracy, durability, and compatibility with modern transformer systems. Designed for use in high-voltage substations and industrial environments, BPD units play a critical role in ensuring safe operation and real-time system visibility.
A Bushing Potential Device is mounted on a transformer bushing—an insulated component that allows electrical conductors to safely pass through grounded equipment while maintaining isolation. The BPD unit taps into the capacitive layers within a condenser bushing and uses internal components to step down voltage to a usable level. This output is commonly used to power and interface with protective relays, voltage monitoring systems, synchroscopes and voltmeters, SCADA, and automation systems. By providing a stable and proportional voltage signal, BPD units help operators monitor system performance, detect abnormalities, and protect critical transformer assets.
Key Features & Benefits
- Accurate Voltage Sensing – Delivers reliable, proportional voltage signals for monitoring and protection
- High-Voltage Integration – Designed for use with condenser bushings in power and distribution transformers
- Robust Construction – Built to withstand electrical stress, temperature variation, and harsh outdoor conditions
- System Protection – Supports relay operation and helps detect abnormal system behavior
- Long Service Life – Engineered for durability in utility and industrial applications
Bushing Potential Device units are widely used across industries that depend on reliable high-voltage transformer performance, including, electric utilities and substations, power generation facilities, steel mills and heavy industrial plants, oil & gas, and petrochemical operations
Parts Super Center offers high-quality transformer components and accessories sourced from trusted manufacturers. Our BPD units are selected for performance, reliability, and compatibility across a broad range of transformer configurations. PSC can help with replacing an existing unit or sourcing components for new installations. Our team provides fast support and dependable solutions to keep your systems operating efficiently.
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