Beskrivning
Electronic Residual Current Protection Relay with Self-Reclosing System
This relay comes with a built-in 28 mm transformer, forming a single unit. It features a super-immunised type-A relay with high-frequency current filtering and high immunity. The device measures true root mean square (TRMS) and includes a display with LEDs and backlit features.
- Residual current reclosing/protection parameters
- Protection trip current
- Number of reclosures
- Protection status messages, etc.
The device has three changeover contact output relays and two simple relays, all of which can be programmed. The main relay provides the protection associated with the contactor, one is for the pre-alarm, and the other is for interlocking once the maximum number of reclosures has been reached. It also has a voltage-free input for external tripping and rearming.
Assembly is on a DIN 46277 rail (EN-50022), with a compact size of 3 modules and connection by pluggable terminal strips.
Application
WRU-10 RAL relays, when associated with a contactor, allow automatic reclosing after tripping. This provides the most suitable solution for applications like:
- Street lights
- ATMs
- Refrigerating chambers
- Traffic lights
Its design guarantees maximum security and electrical service continuity, preventing unwanted tripping.
