Microcontroller Based Differential Relay

This test set-up consists of a. Microcontroller based differential relay. b. 300VA transformer set-up

Specification

• One PIC Microcontroller used as processor to read all current, (PY, SY) & activation of relay function

• One LCD to indicate,
   - Set value, All currents
   - Set time, DMT/IDMT type
   - Relay tripping time.
   - Biased/Unbiased type status

• Four numbers of key used
   - To select IDMT/DMT type or biased un-biased type
   - Set current value adjustment
   - Set time adjustment
   - Reset function

• Six 5A CT used to sense primary and secondary current.
• One 12V TPTT auxiliary relay used for contactor operation.
• Specification:
   - Current input : 0-5Amp
   - Voltage input : 0-230V
   - Number of contact : Three number No contact @ 220V, 10Amp rating.
   - Auxiliary supply : 230VAC, 50Hz

• PC interfacing facility power ON/OFF switch with indicator.
• Make : VI MICRO
• Model : VPL - 83A