Distance protection relay SIPROTEC 7SA series

powerpulsefor electric motors

The SIPROTEC 7SA82/86/87 distance protection have been designed particularly for the protection of lines in medium-voltage and high-voltage systems. With their flexibility and the high-performance DIGSI 5 engineering tool, the SIPROTEC 5 devices offer future-oriented system solutions with high investment security and low operating costs. Features Main function: •Distance protection for medium-voltage and high voltage applications •Interoperability of SIPROTEC 5 and SIPROTEC 4 line protection devices Tripping: •3-pole, minimum tripping time: 19 ms Inputs and outputs: •4 current transformers, •4 voltage transformers, •11 or 23 binary inputs, •9 or 16 binary outputs Hardware flexibility: •Different hardware quantity structures for binary inputs and outputs are available in the 1/3 base module. Adding 1/6 expansion modules is not possible; available with large or small display. Width of housing: •1/3 x 19 inches Functions DIGSI 5 permits all functions to be configured and combined as required. •Minimum tripping time: 19 ms •6 independent measuring loops (6-system distance protection) •Several distance-protection functions can be selected: Classic, reactance method (RMD), impedance protection for transformers •Directional backup protection and various additional functions •Detection of ground faults of any type in compensated or isolated electrical power systems using the following functions: 3I0>, V0>, fleeting contact, cos φ, sin φ, harmonic, dir. Detection of intermittent ground faults and admittance •Ground fault detection using the pulse detection method