Main function: Differential and Distance Protection
Tripping: 1- and 3-pole, minimum tripping time 9 ms
Inputs/Outputs: 12 predefined variants with 4/4 or 8/8 current/voltage transformers, 5–31 binary inputs, 8–46 binary outputs
Hardware flexibility: Adjustable I/O quantity structure within SIPROTEC 5 modular system
Width of housing: 1/3 × 19” to 2/1 × 19”
Configurable with DIGSI 5; function point calculator for required points
Adaptive differential protection with high sensitivity and stability
1-/3-pole automatic reclosing
Distance protection selectable: classic, reactance method, transformer impedance
Directional backup and additional functions, adaptive power-swing blocking, out-of-step protection
Ground fault detection in isolated or arc-suppression-coil-ground systems
Arc protection, automatic frequency relief for underfrequency load shedding
Reactive power-undervoltage protection (QU)
Detection of current and voltage harmonics up to the 50th for selected protection functions
Control, synchrocheck, and switchgear interlocking
Graphical logic editor for automation
Single line representation in small or large display
Integrated Ethernet RJ45 for DIGSI 5 and IEC 61850, up to 4 optional pluggable communication modules
Serial communication via optical fiber, two-wire, networks; automatic ring/chain switchover
Redundancy protocols PRP and HSR
Cybersecurity compliant with NERC CIP and BDWE Whitepaper
Phasor Measurement Unit (PMU) and IEEE C37.118
Time synchronization IEEE 1588
Fault recording buffer: up to 80 sec at 8 kHz or 320 sec at 2 kHz
Auxiliary functions for tests and commissioning
Type: Numerical overcurrent and earth fault relay
Models: 7SR1002, 7SR1003, 7SR1004, 7SR1005
Protection functions: Overcurrent (50/51), Earth Fault (50N/51N), Thermal Overload (49), Broken Conductor (46BC), Negative Phase Sequence (46NPS), Sensitive Earth Fault (50SEF/51SEF), CB Fail (50BF), Cold Load Pickup (51C), etc.
Supervision: Trip Circuit Supervision (74TC), Total Harmonic Distortion (81THD)
Control: Lockout (86), CB Control
Power Supply: Universal AC/DC supply
CT Input: 1A / 5A site-selectable
Communication: USB (front), RS485 MODBUS RTU / IEC 103 (rear)
I/O: Up to 6 Digital Inputs and 6 Digital Outputs
Case: Size 4, 4U high, non-draw-out
Applications: Distribution and industrial protection, motor and voltage-based protection
Standard: IEC 60255 compliant
