Three Phase Over Current & Earth fault Numeric Relay Training System
Introduction
Features
Specifications
Experiment List
Introduction
Three Phase Over Current & Earth fault Numeric Relay Training System is a useful product for Electrical Power System Laboratories. The main purpose of protection relay is to detect and identify faults and interrupts power to the equipment to avoid the entire network to fail or cause more damages to personnel or equipment. An Over Current Relay operates when the load current exceeds a preset value, whereas the function of Earth Fault Relay is to protect any system from earth fault. It includes inbuilt Microcontroller based Numerical Relay with facilities to select various characteristic curves at different Time Multiplier Settings (TMS) and Current Settings.
Features
- Compatible for over current and earth fault relay
- Numeric Relay provides with different Curve’s Selection Facility
- Large Font LCD for input current and tripping time display
- Provided with Current Injection Source
- Microcontroller based Numeric Relays Demonstration
- Front board consist of MS Material with power coating / epoxy paint to avoid any rust
- Separate auxiliary supply to actuate digital measuring devices
- Specially designed BS10 Terminals and patch cords for electrical safety
- Earthing screw provided at the back side of the control set-up
- Product is provided along with protection fuses, colored patch cords, single phase cords, User’s manual having theory operating procedure with connecting diagram, FAQ, Glossary, etc
Specifications
- Mains Supply : Three Phase, 415V ±10%, 50Hz
- Auxiliary Supply : 230V ±10%, 50Hz
Display Measurements
- Current Input : >100mA
- Time Accuracy : 1 Second
Over Current and Earth Fault Relay
- Make : Ashida / Alstom
- Input Current : Suitable for CT Secondary 5A (or) 1A
- Pick up : Within 1.1 times of set value
- Reset value : 90% to 95% of pickup
- Auxiliary Supply : 18-250V AC/DC
- Rheostat : 3Nos. (use as current adjustment)
- MCB (TPN) : 10A
Experiment List
- Study Operating Characteristics of Three Phase Over Current and Earth Fault Numeric Relay with different Time Multiplier Settings (TMS) and Current Setting