Technical Specifications
Stator earth-fault and overload protection
Directional and inverse-time overcurrent protection
Over/undervoltage and over/underfrequency protection
Reverse power and overexcitation protection
Forward power, underexcitation, and negative-sequence protection
Breaker failure and inadvertent energization protection
100% stator earth-fault protection with 3rd harmonic
Impedance and motor protection functions
Communication interfaces: IEC 60870-5-103, PROFIBUS-DP, MODBUS RTU, DNP 3.0
Monitoring: trip circuit, fuse failure, self-supervision, oscillographic fault records
Programmable logic (CFC) and DIGSI 4 engineering compatibility
Protection Functions:
Directional overcurrent protection
Motor protection: start/stop supervision, locked rotor, load jam
Phase and neutral overcurrent protection
Hardware:
4 current transformers, 4 voltage transformers
7 to 48 binary inputs
5 to 21 output relays
Up to 4 high-duty relays
Text or graphical display
Communication Interfaces:
System port: IEC 61850, PROFINET, DNP3 TCP, IEC 60870-5-103, PROFIBUS-DP, DNP 3.0, MODBUS RTU
Service port: DIGSI 4, Modem, Thermobox
Additional port: DIGSI 4, Thermobox
Time synchronization via IRIG B / DCF77
Busbar Protection Functions:
Busbar differential protection
Selective zone tripping
Ultra-fast tripping time (<15 ms)
High stability against external faults (saturation-free ≤2 ms)
Phase-segregated measurement
Integrated check zone
Up to 48 bays and 12 busbar sections configurable
Bay-selective intertripping
Breaker Failure Protection Functions:
Single-phase breaker failure protection (with/without current)
5 operation modes per bay
Separate parameterization for busbar/line faults
Two-stage operation with repeat/trip options
Intertrip via teleprotection
Low-current mode using breaker auxiliary contacts
Additional Functions:
End-fault protection with intertrip or bus zone trip
Backup overcurrent protection (definite or inverse time) per bay
Independent breaker failure protection per bay
Features:
Centralized or distributed installation
Modular and easily expandable
Integrated commissioning aids
User-friendly configuration via DIGSI 4
Universal hardware design
Communication Interfaces:
Fiber Optic Interface: IEC 60870-5-103
Electrical Interface: IEC 61850 (EN100 module, firmware V4.6)
Synchronization and paralleling relay for generators and power systems
Supports 6xV voltage inputs
Available with text or graphical display
Consideration of transformer vector group and tap changer
Synchronization record (instantaneous or RMS)
Full SIPROTEC 4 control functionality
Protection functions (optional):
Undervoltage protection (27)
Overvoltage protection (59)
Frequency protection (81)
Rate-of-frequency-change protection (81R)
Voltage vector jump monitoring
Monitoring functions:
Self-supervision of paralleling function
Measurement of operational values
8 oscillographic fault records
Communication interfaces:
IEC 60870-5-103, IEC 61850, PROFIBUS-DP, MODBUS RTU, DNP 3.0
Service and front interface for DIGSI 4 (modem)
Time synchronization via IRIG-B / DCF77
Applications: synchronization and paralleling in power plants, industrial systems, and utilities
Feeder differential protection with 4xI and 0/3xV inputs
Numerical relay for accurate fault detection
High reliability and compliance with modern protection standards
Suitable for substations, industrial plants, and utility networks
Authorized supply in Mumbai with local technical support
Competitive pricing and Siemens quality assurance
Technical specifications
Stator earth-fault and overload protection
Directional and inverse-time overcurrent protection
Over/undervoltage and over/underfrequency protection
Reverse power and overexcitation protection
Forward power, underexcitation, and negative-sequence protection
Breaker failure and inadvertent energization protection
100% stator earth-fault protection with 3rd harmonic
Impedance and motor protection functions
Communication interfaces: IEC 60870-5-103, PROFIBUS-DP, MODBUS RTU, DNP 3.0
Monitoring: trip circuit, fuse failure, self-supervision, oscillographic fault records
Programmable logic (CFC) and DIGSI 4 engineering compatibility
Protection Functions:
Directional overcurrent protection
Motor protection: start/stop supervision, locked rotor, load jam
Phase and neutral overcurrent protection
Hardware:
4 current transformers, 4 voltage transformers
7 to 48 binary inputs
5 to 21 output relays
Up to 4 high-duty relays
Text or graphical display
Communication Interfaces:
System port: IEC 61850, PROFINET, DNP3 TCP, IEC 60870-5-103, PROFIBUS-DP, DNP 3.0, MODBUS RTU
Service port: DIGSI 4, Modem, Thermobox
Additional port: DIGSI 4, Thermobox
Time synchronization via IRIG B / DCF77
Busbar Protection Functions:
Busbar differential protection
Selective zone tripping
Ultra-fast tripping time (<15 ms)
High stability against external faults (saturation-free ≤2 ms)
Phase-segregated measurement
Integrated check zone
Up to 48 bays and 12 busbar sections configurable
Bay-selective intertripping
Breaker Failure Protection Functions:
Single-phase breaker failure protection (with/without current)
5 operation modes per bay
Separate parameterization for busbar/line faults
Two-stage operation with repeat/trip options
Intertrip via teleprotection
Low-current mode using breaker auxiliary contacts
Additional Functions:
End-fault protection with intertrip or bus zone trip
Backup overcurrent protection (definite or inverse time) per bay
Independent breaker failure protection per bay
Features:
Centralized or distributed installation
Modular and easily expandable
Integrated commissioning aids
User-friendly configuration via DIGSI 4
Universal hardware design
Communication Interfaces:
Fiber Optic Interface: IEC 60870-5-103
Electrical Interface: IEC 61850 (EN100 module, firmware V4.6)
Synchronization and paralleling relay for generators and power systems
Supports 6xV voltage inputs
Available with text or graphical display
Consideration of transformer vector group and tap changer
Synchronization record (instantaneous or RMS)
Full SIPROTEC 4 control functionality
Protection functions (optional):
Undervoltage protection (27)
Overvoltage protection (59)
Frequency protection (81)
Rate-of-frequency-change protection (81R)
Voltage vector jump monitoring
Monitoring functions:
Self-supervision of paralleling function
Measurement of operational values
8 oscillographic fault records
Communication interfaces:
IEC 60870-5-103, IEC 61850, PROFIBUS-DP, MODBUS RTU, DNP 3.0
Service and front interface for DIGSI 4 (modem)
Time synchronization via IRIG-B / DCF77
Applications: synchronization and paralleling in power plants, industrial systems, and utilities
Feeder differential protection with 4xI and 0/3xV inputs
Numerical relay for accurate fault detection
High reliability and compliance with modern protection standards
Suitable for substations, industrial plants, and utility networks
Authorized supply in Mumbai with local technical support
Competitive pricing and Siemens quality assurance
