This set up is designed to study the working principle and IDMT characteristics of Earth Fault relay (digital). This set up consists of

  1. Earth Fault Relay –DMT/IDMT Type & (2).Earth Fault simulator set up (Motor set up)

Type                Microcontroller based Earth Fault Current Relay

CT Input         1A

PMS                50% -200% in steps of 25%

TMS                0.1 to 1 in steps of 0.1s

Function         IDMT/DMT

Make               Power lab

  • 20X4 LCD indicator for set & actual current indication and trip status indication
  • In built stop clock for trip time indication
  • 4 numbers of Touch Keys for parameter setting & selection
  • Banana connectors for CT input
  • DMT / IDMT Characteristics selection
Earth Fault simulator set up (Motor set up)

This simulator is designed to test the earth fault relay with IDMT characteristics. It consists of

  • One number of  3 phase ac induction motor/0.5hp/3 phase/1440rpm-siemens Make is provided For short circuit /earth fault  creation
  • One number of short circuit resistor is provided to limit short circuit /Earth current
  • One number of digital AC Ammeter (0-5A) /3.5 digit / MECO Make is provided to measure the earth current input in amp
  • One number of Automatic trip time measurement circuit (ATTM Circuit) is provided
  • One number reset switch is provided in front panel to restart the digital stop clock
  • All are mounted on a nice cabinet with diagram stickered on front &230VAC@50Hz
  • AC Input with power ON/OFF Switch
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