Technical specifications
Model: 7SR157 Argus
Type: Check and System Synchronising Relay
Function: Controlled circuit breaker closing through voltage measurement
Case: 4U, size E4
Communication: USB (front), RS485 (rear) – MODBUS RTU / IEC 60870-5-103
Input/Output: Fully integrated with data logging and fault reporting
Monitoring Functions:
Undervoltage Detector (25) • Differential Voltage Detector (25) • Voltage Level (live/dead status) (25) • Close Circuit Supervision (74) • VT Fail (60)
Control Functions:
Voltage Trim (magnitude/phase) (25) • System-Split Detector (25) • Check Synchronizing (25) • Synchronizing Close Guard (25) • System Synchronizing (25) • Close on Zero Synchronizing (25) • System-Split Lockout (25) • Synchronizing Bypass (25)
Features:
Prevents circuit breaker closure when voltage, phase angle, or slip frequency exceed limits
Enables automatic or manual closing when parameters are within range
Provides full instrumentation, data logging, and fault reporting
USB and RS485 communication for local and remote access
Ideal for industrial, substation, and grid synchronization applications
Power Supply: 48–250 V DC / 100–230 V AC
Inputs: 3 phase CTs, 1 standard neutral CT, 1 sensitive neutral CT, 4 VT voltage inputs
Digital I/O: 16 DI / 12 DO
Communications: Ethernet HSR/PRP/PTP (LC), RS485
Backup Memory: Yes
Dimensions: 180 × 152.4 × 224 mm
Net Weight: 3.5 kg
Application: Feeder – directional overcurrent protection
Standards: EN 60255-26, EN 60255-27, UL
Certification: Marine
Transformer differential protection
Thermal overload protection
Voltage protection
Hot-spot and aging-rate monitoring
Optional OLTC motor-driven automatic voltage regulation
8 RTD/mA inputs + 4 mA outputs
Fully configurable logic and functions
Native IEC 61850 Ed.1 with GOOSE
Supports DNP3 (TCP/IP) and IEC 60870-5-103
Integrated or detached HMI with configurable push buttons
All-in-one protection, control, monitoring and supervision
–
Technical Specifications
Model: 7SR157 Argus
Type: Check and System Synchronising Relay
Function: Controlled circuit breaker closing through voltage measurement
Case: 4U, size E4
Communication: USB (front), RS485 (rear) – MODBUS RTU / IEC 60870-5-103
Input/Output: Fully integrated with data logging and fault reporting
Monitoring Functions:
Undervoltage Detector (25) • Differential Voltage Detector (25) • Voltage Level (live/dead status) (25) • Close Circuit Supervision (74) • VT Fail (60)
Control Functions:
Voltage Trim (magnitude/phase) (25) • System-Split Detector (25) • Check Synchronizing (25) • Synchronizing Close Guard (25) • System Synchronizing (25) • Close on Zero Synchronizing (25) • System-Split Lockout (25) • Synchronizing Bypass (25)
Features:
Prevents circuit breaker closure when voltage, phase angle, or slip frequency exceed limits
Enables automatic or manual closing when parameters are within range
Provides full instrumentation, data logging, and fault reporting
USB and RS485 communication for local and remote access
Ideal for industrial, substation, and grid synchronization applications
Power Supply: 48–250 V DC / 100–230 V AC
Inputs: 3 phase CTs, 1 standard neutral CT, 1 sensitive neutral CT, 4 VT voltage inputs
Digital I/O: 16 DI / 12 DO
Communications: Ethernet HSR/PRP/PTP (LC), RS485
Backup Memory: Yes
Dimensions: 180 × 152.4 × 224 mm
Net Weight: 3.5 kg
Application: Feeder – directional overcurrent protection
Standards: EN 60255-26, EN 60255-27, UL
Certification: Marine
Transformer differential protection
Thermal overload protection
Voltage protection
Hot-spot and aging-rate monitoring
Optional OLTC motor-driven automatic voltage regulation
8 RTD/mA inputs + 4 mA outputs
Fully configurable logic and functions
Native IEC 61850 Ed.1 with GOOSE
Supports DNP3 (TCP/IP) and IEC 60870-5-103
Integrated or detached HMI with configurable push buttons
All-in-one protection, control, monitoring and supervision
–
