voltage protection relay / digital / differential / configurable
7SS85

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voltage protection relay voltage protection relay - 7SS85
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Characteristics

  • Measured/monitored value:

    voltage

  • Other characteristics:

    digital, differential, configurable, IEC, modular, high-voltage, with integrated transformer, panel-mount, three-phase

Description

The SIPROTEC 7SS85 busbar protection is a selective, safe and fast protection against busbar short circuits in medium voltage systems, high voltage systems, and systems for very high voltage with a large variety of busbar configurations. The SIPROTEC 7SS85 can be used both as a centralized and a distributed solution. Selection of the device base functionalities (significant properties) and the modular hardware structure permit optimum adaptation of the SIPROTEC 7SS85 to a large variety of system configurations and functional requirements up to a comprehensive station protection.

Features
Selection of the device base functionalities (significant properties) and the modular hardware structure permit optimum adaptation of the SIPROTEC 7SS85 to a large variety of system configurations and functional requirements.

Functionality
The busbar protection SIPROTEC 7SS85 encompasses the following maximum quantity structure:
•20 3-phase measuring points (current transformer)
•4 3-phase measuring points (voltage transformer)
•26 bays (feeders, couplers, bus-section disconnections)
•6 bus zones (busbar sections with measuring function)
•6 couplers (with 1 or 2 current transformers)
•3 auxiliary busbars (busbar sections without measuring function)
•Phase-selective measurement and Display
•Selective tripping of faulty busbar sections
•Optional additional decentralized binary in- and outputs via protection interface (PI) or IEC 61850 (GOOSE) provide new concepts for busbar protection

Functions
All functions can be configured as required with DIGSI 5. Using some functions requires the appropriate number of free function points to be available in the device.