Siprotec 5-7SJ86(Siemens)

SIPROTEC 7SJ86

The SIPROTEC 7SJ86 overcurrent protection has specifically been designed as backup or emergency protection for the line protection devices. With its modular structure, flexibility and the powerful DIGSI 5 engineering tool, the SIPROTEC 7SJ86 device offers future-oriented solutions for protection, control, automation, monitoring and PQ basic

Main function:

Overcurrent protection (V/inverse-time overcurrent protection)

Tripping:

3-pole

Inputs and outputs:

3 predefined standard variants with 

4 current transformers, 

4 voltage transformers,

11 to 23 binary inputs,

9 to 25 binary outputs

Hardware flexibility:

Flexibly adjustable and expandable I/O quantity structure within the scope of the SIPROTEC 5 modular system.

Housing width:

1/3 × 19 inches to 2/1 × 19 inches

DIGSI 5 permits all functions to be configured and combined as required.

Overcurrent protection as backup / emergency line protection for all voltage levels with 3-pole tripping

Optimized tripping times due to directional comparison and protection data communication

Detection of ground faults of any type in compensated or isolated electrical power systems using the following functions: 3I0>, V0>, transient ground fault, cos φ, sin φ, dir. detection of intermittent ground faults, harmonic detection and admittance measurement

Ground fault detection using the pulse detection method

Fault locator plus for accurate fault location with inhomogenous 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

Overvoltage and undervoltage protection

Frequency protection and frequency change protection for load shedding applications

Power protection, configurable as active or reactive power protection

Protection functions for capacitor banks, such as overcurrent, overload, current unbalance, peak overvoltage, or differential protection

Directional reactive power undervoltage protection (QU protection)

Detection of current and voltage signals up to the 50th harmonic with high accuracy for selected protection functions (such as thermal overload protection) and operational measured values

PQ-Basic: voltage unbalance; voltage changes: overvoltage, dip, interruption; TDD, THD and Harmonics

Control, synchrocheck and switchgear interlocking protection

Circuit-Breaker Failure Protection

Circuit breaker reignition monitoring

Graphical logic editor to create powerful automation functions in the device

Single-line representation in small or large display

Integrated electrical Ethernet RJ45 for DIGSI 5 and IEC 61850 (reporting and GOOSE)

Up to 4 pluggable communication modules, usable for different and redundant protocols (IEC 61850-8-1, IEC 61850-9-2 Client, IEC 60870-5-103, IEC 60870-5-104, Modbus TCP, DNP3 serial and TCP, PROFINET IO, PROFINET IO S2 redundancy)

 Virtual network sharing (IEEE 802.1Q - VLAN)

Serial protection data communication via optical fibers, two-wire connections and communication networks (IEEE C37.94, and others), including automatic switchover between ring and chain topology

Reliable data transmission via PRP and HSR redundancy protocols

Extensive cybersecurity functionality, such as role-based access control (RBAC), protocolling security-related events, signed firmware or authenticated network access IEEE 802.1X

Simple, quick and secure access to the device via a standard Web browser to display all information and diagnostic data, as well as vector diagrams, single-line and device display pages

Phasor Measurement Unit (PMU) for synchrophasor measured values and IEEE C37.118 protocol

Time synchronization using IEEE 1588

Powerful fault recording (buffer for a max. record time of 80 sec. at 8 kHz or 320 sec. at 2 kHz)

Auxiliary functions for simple tests and commissioning

Flexibly adjustable I/O quantity structure within the scope of the SIPROTEC 5 modular system