Micro controller based single phase differential relay study trainer (merz price protection scheme)

MICRO CONTROLLER BASED DIFFERENTIAL RELAY

• One no. of PIC Micro controller used as processor to read all current, (PY & SY) & activation of relay function.
• One number of LCD to indicate Current & Time Constants.
• Four no. of key used for set point adjustments.
• Two no. of 5A CT used to sense primary and secondary current.
• One no. of 12V DPDT auxiliary relay used for contractor operation.
• One no of LED to indicate the relay tripping condition

 SPECIFICATION:

• Current input: 0-5Amp
• One number ‘NO’ contact @ 220V, 5 Amp rating
• Auxiliary supply: 230V AC, 50Hz

• Power ON/OFF switch with indicator.
• One no of NC contact @ 220V, 5Amp rating

 SINGLE PHASE TRANSFORMER SET-UP

• One no. of 24-0-24V Single phase transformer with primary and secondary side inter winding termination for fault creation.
• One no. of 230V / 48V transformer provided for fault transformer input voltage.
• Lamp provided for load.
• One no of 0-48V single phase transformer
• Diff types of fault L-L, L-N can be created using termination.
• One no. of rheostat provided for variation of short circuit resistance.
• One no of SPDT switch to connect the load