An OSR (Oil Surge Relay) is an essential transformer protection device designed to detect sudden oil movement caused by internal transformer faults. Installed in the pipeline between the conservator tank and the main transformer tank, the relay quickly senses abnormal oil surges and activates an alarm or trip circuit, helping prevent severe transformer damage and costly downtime.
Our Transformer Oil Surge Relays (OSR Relays) are manufactured for dependable performance in power, distribution, furnace, solar, wind, and industrial transformers. Designed for long service life and accurate operation, these relays provide reliable protection against internal electrical faults while ensuring stable performance under demanding operating conditions.
 
Features
Fast and reliable oil surge detection
High mechanical strength and corrosion-resistant construction
Suitable for indoor and outdoor transformer installations
Low maintenance and long operational life
Accurate operation with dependable switching performance
Easy installation and replacement in existing transformer systems
Compatible with various transformer ratings and designs
 
Applications
OSR Relays are widely used in power transformers, distribution transformers, industrial transformers, utility substations, renewable energy projects, electrical distribution networks, OEM transformer manufacturing, transformer repair, refurbishment, and maintenance applications.