Differential protection relay SIPROTEC 7SD series

voltagetransmission linepanel-mount

The SIPROTEC 7SD82/86/87 line differential protection have been designed particularly for the selective protection of overhead lines and cables with single-ended and multi-ended infeed in medium-voltage and high-voltage systems. Transformers and compensating coils in the protection range are also possible. 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: •Differential 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: •2 different quantity structures for binary inputs and outputs are available in the 1/3 base module. Adding 1/6 expansion modules is not possible; housing width available with large or small display. Housing width: •1/3 × 19 inches Functions DIGSI 5 permits all functions to be configured and combined as required. •Minimum tripping time: 19 ms •Main protection function is differential protection with adaptive algorithm for maximum sensitivity and stability even with the most different transformer errors, current-transformer saturation and capacitive charging currents •Directional backup protection and various additional functions