SIEMENS over-current protection relays

... 7SJ85 overcurrent protection has been designed specifically for protection of feeders and lines in medium-voltage and high-voltage systems. The SIPROTEC 7SJ86 overcurrent ...

... Standard functionality •37/ 37G undercurrent protection •46 Negative sequence overcurrent protection •46BC Broken conductor detection •49 Thermal overload protection •50/ ...

... Reyrolle 7SR45 numeric relay provides both definite time and inverse time overcurrent and earth fault protection functions ensuring sensitivity with a minimum operate setting of 0.2 ⋅ ...

... ,7SR21 and 7SR22 Argus overcurrent protection devices have been specifically designed to provide feeder protection for distribution and industrial networks. Features The Reyrolle ...

... Definite and inverse time-overcurrent protection (phase/ground) (50, 50N, 51, 51N) •Directional time-overcurrent protection (phase/ground) (67, 67N) •Directional sensitive ...

... Functions Protection functions •Overcurrent protection (definite-time/inverse-time/user-def.) •Sensitive earth-fault detection •Intermittent earth-fault protection •High-impedance ...

... differential function a backup overcurrent protection for 1 winding / star point is integrated in the relay. Optionally, a low or high-impedance restricted earth-fault protection, ...