Microcontroller Based Distance Impedance Relay Trainer

It consists of many components i. Transmission line module ii. Voltage and current signal conditioners iii.Distance Relay iv. Multifunction Meters

Transmission Line Module

• Total line length - 180Km

• Modeled by RL - parameters
• Current rating - max 5A
• Voltage rating - max 250V AC

Voltage and Current Signal Conditioners

• One no of 5A/5V current transformer is provided to read the relay current input
• One no of 230V/9V potential transformer is provided to read the relay voltage input

Distance Relay

• One PIC microcontroller used as processor to activate the relay function
• One LCD to indicate :
   - Impedance set value
   - Current & voltage value
   - Set time, Relay tripping time

• Four numbers of keys are used
• Parameters
   - Current input : 0-5Amps, Voltage input : 0-230V AC
   - Number of contact: One number of NO contact @ 220V, 10Amp rating
   - Auxillary supply : 230V AC, 50Hz

Multifunction Meter

• One MFM provided for measuring input side all parameters (V, I, PF, F, AVR, KW)
• One MFM provided for measuring load side line parameters