Description
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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
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