Technical Specifications
Type: High Impedance Differential Protection Relay
Brand: Siemens Reyrolle
Model: 7PG23
Operating Principle: Voltage-operated high impedance protection
Applications: Transformer restricted earth fault protection, reactor and stator winding fault detection
Features:
Sensitive, fast fault detection for internal earth faults
High stability during external faults
User-selectable operating voltage setting
Integral non-linear voltage limiting resistor
Optional external shunt resistor for higher operating current
Operation flag indicator for clear fault identification
Compatible with Reyrolle High Impedance Software Tool for easy setting calculations
Mounted in E3 size case
Protection Functions: High impedance restricted earth fault (REF) protection
Accessories: Stabilizing resistors, setting resistors, nonlinear voltage limiting resistors (optional)
Compliance: IEC Standards
Software Support: Reyrolle High Impedance Software Tool (free download)
Main Function: Fault Recorder for medium to extra-high voltage systems
Inputs and Outputs:
Up to 40 analog channels
43 binary inputs
33 binary outputs
Hardware: Modular SIPROTEC 5 platform, expandable I/O structure
Housing Width: 1/3 to 1/1 × 19 inches
Communication: IEC 61850 Edition 1 & 2, PRP/HSR redundancy
Functions:
High-precision fault recording and event logging
Real-time power system monitoring and analysis
Data security and lifecycle transparency
Supports generators, transformers, and grid analysis
Benefits:
Improved fault diagnosis and reliability
Clear documentation of system events
Simple operation and integration with DIGSI 5
Reduced downtime and increased operational safety
Feeder protection
Extensive protection and control functionality, with sensors or conventional instrument transformers
Ready-made standard configurations for fast and easy setup
Withdrawable plug-in unit design for swift installation and testing
Large graphical display for customizable single-line diagrams (SLDs), accessible locally or via web-based HMI
Extensive lifecycle services
Directional and non-directional overcurrent and earth-fault protection, voltage, frequency, and power measurement
Multi-frequency admittance-based earth-fault protection for higher sensitivity and selectivity
Optional fast fault location for short circuits, earth faults, arc protection, and high-speed outputs
IEC 61850 Editions 1 & 2 support: HSR, PRP, GOOSE messaging, IEC 61850-9-2 LE
IEEE 1588 V2 for high-accuracy time synchronization
Supports Modbus, DNP3, and IEC 60870-5-103 protocols
Rated current: 630A–6300A
Voltage: Up to 1150VAC, non-automatic switches up to 1000VDC
Pole configuration: 3 or 4 poles; fixed-mounted and draw-out versions
Operating mechanisms: UL 489, UL 1066, UL 977, IEC versions
Communications: PROFIBUS, PROFINET I/O, MODBUS; integrated with 3VL
Compact, high-performance design without energy-wasting heat sinks
Extended instantaneous protection, visible ready-to-close indicators, customizable interlocks, and mechanical trip indication
Common guide frames for UL 489 and ANSI/UL 1066 for interchangeability
Internal Rogowski CTs for precise protection and metering
Modular and flexible configurations
Compliance: UL, CSA, IEC 60947-2, DIN VDE 0690 Part 1, CCC, GOST, shipbuilding standards (GL, ABS, LRS, PRS)
World's smallest air circuit breaker in the upper performance range (5000A–6300A, FS3)
Inputs/Outputs:
• 4 CT + 8 BI + 6 BO
• 4 CT + 13 BI + 8 BO
• 4 CT + 38 BI + 18 BO
• 4 CT + 4 VT + 9 BI + 8 BO
• 4 CT + 4 VT + 14 BI + 10 BO
• 4 CT + 4 VT + 39 BI + 20 BO
Communication: USB front port, RS485, dual RJ45 Ethernet, optional optical Ethernet
Display: 128x128 backlit LCD, with mimic diagram capability
Housing: Size 6 or 12, withdrawable design
Standard IEC 61850 communication, enhanced cybersecurity
Application: Industrial feeders, utilities, and substations
