High Voltage and Relay Lab

The department has set up a High Voltage Lab with a High voltage transformer, calibrating spheregap, and various electrode arrangements to carryout High voltage experiments up to 140 KV. The Lab. also has insulating oil testing kit and High voltage insulation tester.

DSC 0053 DSC 0055

Specifications of Equipments

EQUIPMENT NAME

SPECIFICATION

2 H.V.Transformers with Control Panel

100kV, 5kVA, Combined AC/DC impulse set, Make: W.S.test system

100mm sphere gap with different type electrodes

Electrode type: rod-rod, sphere electrode 50mm, needle, flat

Digital Temp/Humidity meter

.

Oil insulation testing equipment

0-50kV, 50mA, Make: Udey model:US/5

Thermo hydrometer 130mm

make: GERUCON

Static over current-relay, Static Non directional Relay, Definite Time Over-current relay

Single element type Make: GEC ALSTHOM Type:CTU-12 CT Sec: 5 Amp O/C setting: 50-200% Time Range: 0.6-6sec Contact: 1 N/O, 1N/C, Flag:7CS, AUX Volts:230/240V

IDMT single pole Earth Fault Relay

Inverse Definite minimum Time, Make: GEC ALSTHOM Type:CDG-11, CT Sec:0.5Amo, D.M.T: 03 Sec, Burden: 03VA, Contacts: 2 N/O, 2N/C

Static Reverse Power RElay

Type: CCUM-21, Make: GEC ALSTHOM, CT Sec:05 Amp, AUX Voltage: 230V AC, Freq: 50Hz, Time Delay: 1-10 Sec

Static Single Pole Biased Differential Relay

Type: DTI M11 PF6A, Make: GEC ALSTHOM, AUX Voltage: 230-250V. AC, Sec Current:05Amp, Freq: 50Hz

L-C-R-Q meter

Aplab make Auto compute, model 4910

Microprocessor based 3-phase over current relay

Make: L&T, Model: MC61-C

Areva make Negative phase sequence relay

type: CTUM 12

Power Quality Analyzer 3196

Make: HIOKI

 

Exercises Conducted:

  • Breakdown strength of transformer oil using oil testing unit
  • Measurement of HVAC & HVDC using standard spheres
  • Sparkover characteristics of air insulation subjected to high voltage impulse-with sparkover voltage corrected to STP
  • Sparkover characteristics of air insulation subjected to high voltage DC
  • Spark over characteristics of air insulation subjected to high voltage AC-with spark over voltage corrected to STP
  • Motor protection-simulation studies
  • Field mapping using Electrolytic tank for any one model-Cable/capacitor/transmission line/sphere-gap models
  • Generator protection-Merz Price protection scheme
  • Operating characteristics & calculation of error in operating time for over-current relay(solid state or electromechanical type)
  • Operating characteristics of microprocessor based (numeric) distance relay
  • Operating characteristics of microprocessor based (numeric) over-current relay
  • Current -Time characteristics of fuse
  • Bias characteristics of Differential relay
  • Operation of negative sequence relay
  • Operating characteristics of over voltage or under voltage relay(Solid state or electromechanical type)
  • Feeder protection-simulation studies
  • Operating characteristics of microprocessor based (numeric) over/under voltage relay