Catalog excerpts


Description The SIPROTEC 7SA86 distance protection has been designed specifically for the protection of lines. With its modular structure, flexibility and the high-performance DIGSI 5 engineering tool, the SIPROTEC 7SA86 device offers future-oriented solutions for protection, control, automation, monitoring, and Power Quality - Basic. Main function Distance Protection Interoperability of SIPROTEC 4 and SIPROTEC 5 line protection devices Tripping 3-pole, minimum tripping time: 9 ms Inputs and out- 12 predefined standard variants with 4/4 puts or 8/8 current transformers/voltage trans formers, 5 to 31 binary inputs, 8 to 46 binary outputs Hardware Flexibly adjustable I/O quantity structure quantity within the scope of the SIPROTEC 5 modu- Housing width 1/3 x 19 inch to 2/1 x 19 inch Applications • Detection and selective 3-pole tripping of short circuits in electrical equipment of star networks, lines with infeed at one or 2 ends, parallel lines, and open-circuited or closed ring systems of all voltage levels • Detection of ground faults in isolated or arc-suppres-sion-coilground systems in star, ring, or meshed arrangement • Serial protection communication with SIPROTEC 5 and SIPROTEC 4 devices over different distances and physical media, such as optical fiber, two-wire connections, and communication networks • Backup protection for differential protection devices of all kind for lines, transformers, generators, motors, and busbars • Phasor Measurement Unit (PMU) SIPROTEC 5 Device with Expansion Module • Detection and recording of power-quality data in the mediumvoltage and subordinate low-voltage power system Functions DIGSI 5 permits all functions to be configured and combined as required. • Minimum tripping time: 9 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>, transient ground fault, cos 0, sin 0, dir. detection of intermittent ground faults, harmonic detection, and admittance measurement • Ground-fault detection using the pulse-detection method • Adaptive power-swing blocking, out-of-step protection

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Detection of current-transformer saturation for fast tripping with high accuracy Fault locator plus for accurate fault location with in-homogenous line sections and targeted automatic overhead line section reclosing (AREC) Arc protection Automatic frequency relief for underfrequency load shedding, taking changed infeed conditions due to decentralized power generation into consideration Power protection, configurable as active or reactive-power protection Directional reactive-power undervoltage protection (QU protection) Detection of current and voltage signals up to the 50th harmonic with...

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