Product/Technical Services
Transformer Protection IED GRT200
Product Overview
The GRT200 transformer protection IED has been designed to provide complete protection for two-winding or three-winding power transformers, auto-transformers and generator-transformers, within the flexible and user-friendly GR-200 Series platform. Up to five current inputs can be provided for the phase-segregated differential protection. The main transformer differential protection is supported by restricted earth fault, backup overcurrent, thermal overload, over-excitation and frequency protections.
Technical Description
Protection functions
Current differential protection for two- or three-winding transformers incorporating stability against inrush, over-excitation and CT saturation
Inrush current detection
Mixed 1A/5A inputs for phase and neutral currents
CT ratio, vector and zero-sequence compensation
Restricted earth fault protection incorporating enhanced stability against CT saturation
Circuit breaker failure protection
Non-directional overcurrent protection for phase faults
Non-directional overcurrent protection for earth faults using neutral current
Directional / non-directional overcurrent protection for earth faults using phase currents
Negative phase sequence overcurrent protection
Thermal overload protection
Broken conductor protection
Inrush current detector
Overexcitation protection
Under/over frequency and rate of change of frequency protection
Metering and recording functions
Metering
- Power system voltages, currents, power, frequency and power factorRecording
- Event record
- Fault record
- Disturbance record
- Fault location function
Communication Protocols
Communications with substation automation system IEC 61850-8-1 (Ed 1.0 and Ed 2.0) or IEC 60870-5-103
Communications with process level equipment (Merging Unit) IEC 61850-9-2.
Ethernet redundancy protocol IEC62439-3 PRP/HSR/RSTP
Time Synchronization
Time synchronization with external clock server by SNTP, IEEE 1588, and IRIG-B
Process Bus (Client)
| Supported Sample Value Stream | 4800Hz ASDU 2 (60Hz x 80sp or 50Hz x 96sp) 4800Hz ASDU 1 (50Hz x 96sp) 4000Hz ASDU 1 (50Hz x 80sp) |
|---|---|
| Max. number of analog channel per stream | 8 |
| Max. number of stream | 4 |
| Max. number of Process Bus communication port per IED | Max. 2 ports (redundancy options: PRP/HSR) |
Cyber Security
Extensive cyber security features:
Port and protocol control
Complexed password for extra security user authentication
Security event logging
Encrypted communication between GR-TIEMS and IED (Optional)
Role-based Access Control (RBAC) based on IEC 62351-8 (Optional)
Human interfaces
Selection of HMI: Standard LCD / large LCD
24 configurable tri-state LEDs selectable red/green/yellow
7 programmable function keys for user demand operation
Personal computer interface (USB and Ethernet ports)
Monitoring jacks for internal circuit test
