SIPROTEC 7SD87 Line Differential Protection

The SIPROTEC 7SD87 differential protection device is suitable for the selective protection of overhead lines and cables with single-ended and multi-ended infeed of all lengths with up to 6 ends. Transformers and compensating coils in the protection range are also possible. With its modular structure, flexibility and the powerful DIGSI 5 engineering tool, the SIPROTEC 7SD87 device offers future-oriented system solutions with high investment security and low operating costs.

Main function: Differential Protection Tripping: 1-pole and 3-pole, minimum tripping time: 9 MS Inputs and outputs: 12 predefined standard variants with 4/4 or 8/8 current/voltage transformers, 5 to 31 binary inputs, 8 to 46 binary Outputs Hardware flexibility: Flexibly adjustable I/O quantity structure within the scope of the SIPROTEC 5 modular System Housing width: 1/3 × 19 inch to 2/1 × 19 Inch