Product/Technical Services
High Impedance Differential Protection IED GRH200
Product Overview
GRH200 is high impedance differential protection IED designed to provide very reliable, high speed and secure protection for various types of busbar system at all voltage levels. GRH200 provides phase-segregated high impedance differential protection for various busbar system such as single, double, or one and a half busbar configuration. GRH200 also provides T-zone protection of one and a half busbar, short line cable protection, and single phase restricted earth-fault protection. GRH200 is also equipped with basic control function for controlling various switching equipment. Device monitoring and recording functions are also provided within the flexible and user-friendly GR-200 Series platform.
Typical protection application examples are shown on the following figure.
High Impedance Busbar Protection
Transformer Restricted Earth Fault Protection
Technical Description
Protection Functions
Two stages of phase-segregated overcurrent elements for high impedance differential protection of busbar system
Two stages of single-phase overcurrent element for restricted earth fault protection
Trip circuit supervision
Control Functions
Switchgear Control
IED Mode Control
Interlock Check
Programmable Automatic Sequence Control
Programmable Logic Control (PLC)
General Functions
Eight settings groups to cover various operating conditions
Automatic self-supervision
Time synchronization by external clock via SNTP or using IRIG-B
Password protection for settings and selection of local/remote control
Simulation and test function to check protection/control function
Internal circuit checks using forcible signal
Metering and recording functions
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Metering
Power system current, voltage, and frequency
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Recording
Event Record
Fault Record
Disturbance Record
Hardware Flexibility
Various models and hardware options for flexible application depending on system requirement and controlled object
Multi range DC power supply: 24 to 60V /110 to 250V
Configurable binary inputs and outputs
Communication Interface
Various option of system interface - RS485, fibre optic 100BASE-FX, 1000BASE-LX, 100BASE-TX/1000BASE-TX
Support for multiple communication protocol - IEC 61850 (Ed 1.0 and 2.0), IEC 60870-5-103, IEC 62439 PRP/HSR/RSTP
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 Interface
Selection of HMI: Standard LCD / large LCD
24 configurable tristate 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
