KAR1-HD Earth leakage Relays
Description Electronic earth leakage protection relay, connected to the external transformers of the CT-1/ CTA-1 series. Ultra-immunized type relay with high frequency currents filtering and high immunity. Type-A relay with third harmonic filtering (settable). True root mean square (TRMS) measure. Fail safe function for each four relays. Log tripped residual current. - Compact size: 3 modules - Display of data on the screen - Two independent programmable outputs (main and pre-alarm)
1. Applications The KAR1-HD relays associated with CT-1/CTA-1 transformers offer smart earth leakage protection. Their design features guarantee maximum security and electrical service continuity, avoiding unwanted tripping. Viewing the instantaneous leakage value on the display, together with the pre-alarm indicators, makes it possible to obtain information on the status of lines to be protected, and to perform adequate preventive maintenance
In addition, version KAR1-HD 485 features RS-485 communications, with Modbus RTU protocol, offers centralised supervision in real time, as well as keeping a log of historical data for future analysis.