American SEL-352 relay protection device circuit breaker failure relay

The SEL-352 circuit breaker failure relay is a genuine SEL product sourced directly from the US manufacturer. We offer competitive pricing through group shipping and can provide remote or on-site installation and commissioning services for SEL products.

The SEL-352 relay provides circuit breaker failure protection, control, and monitoring.

Features include a cost-effective data logger and a sophisticated circuit breaker monitor and controller to reduce maintenance and manual supervision. The SELogic control equations provide flexibility for applying the SEL-352 relay to a variety of applications.

Circuit breaker failure protection—One SEL-352 is used per circuit breaker for single-pole or three-pole circuit breaker failure detection.

It detects tripping failures, closing failures, pole mismatches, opening failures (flashover detection), tripping or closing failures due to resistive switch jamming, and dielectric stress losses under fault or load conditions.

Overcurrent fault detection includes drooping current logic, providing rapid reset after the circuit breaker opens.

Data Logging and Event Analysis – Records 10-second oscilloscope event reports, stores up to 512 points of Sequential Event Recorder (SER) data, and monitors circuit breaker tripping and closing operations, including accumulated interruption current and mechanical and electrical circuit breaker operating times.

Configurable Circuit Breaker Control – Choose from five built-in schemes to cover ring bus, half-circuit, or double-bus applications, or modify custom applications using SELogic control equations. Sophisticated circuit breaker control also includes Motorized Disconnect (MOD) tripping and power circuit breaker isolation safety logic.

Point-on-Wave Technology – Extends circuit breaker life and reduces system transients and re-breakdown of circuit breaker contacts by implementing point-on-wave technology.

Our company offers a superior supply of the American SEL-352 circuit breaker failure relay, sourced directly from the manufacturer to ensure genuine and comprehensive circuit breaker failure protection.

The SEL-352 provides protection against circuit breaker failures, including failure to trip due to faults or load conditions; failure to close, including pole divergence; faults during opening (fire detection); inability to trip or close due to resistive switch jamming; and dielectric stress loss.

Five built-in schemes can be modified using SELogic control equations for application flexibility. Trip fault schemes are suitable for single and multiple circuit breaker applications, single-pole closing and tripping applications.

Circuit breaker fault detection elements include settling current detection logic, providing fast reset after circuit breaker opening, reducing coordination delays for improved system stability.

Complete circuit breaker control functions include MOD tripping and power circuit breaker isolation safety logic, retripping, on-peak and interleaved phase closing, synchronization checks, and trapped charge polarity detection for complex circuit breaker control. The extensive SELogic control equations allow you to create custom automatic reclosing schemes.

Data logging features include up to 10 60-cycle oscilloscope event reports (64 samples/cycle), up to 512 SER reports, circuit breaker trip and close monitor details, and summaries of electrical and mechanical operating times. transients, and harsh temperatures, meeting stringent industry standards.

For even harsher environments, order a conformal coating for the printed circuit board to provide an additional barrier against airborne contaminants such as hydrogen sulfide, chlorine, salt, and moisture.

For more information on the SEL-352 protection device, please contact our sales department.

Share Article