RELAY AND HIGH VOLTAGE LABORATORY (18EEL77)

RELAY AND HIGH VOLTAGE LABORATORY

Course Code 18EEL77
CIE Marks 40
Number of Practical Hours/Week 0:2:2
SEE Marks 60
Credits 02
 Exam Hours 03

|Course Learning Objectives:

• To conduct experiments to verify the characteristics of over current, over-voltage, under-voltage relays both electromagnetic and static types.
• To verify the operation of the negative sequence relay.
• To conduct experiments to verify the characteristics of microprocessor-based over-current, over-voltage, under-voltage relays, and distance relay.
• To conduct experiments on the generator, motor, and feeder protection.
• To conduct experiments to study the spark over characteristics for both uniform and non-uniform configurations using High AC and DC voltages.
• To measure high AC and DC voltages
• To experimentally measure the breakdown strength of transformer oil.
• To experimentally measure the capacitance of different electrode configuration models using
• Electrolytic Tank. To generate standard lightning impulse voltage and determine efficiency, the energy of impulse generator, and 50% probability flashover voltage for air insulation.

Experiments

Total of Six experiments are to be conducted by selecting Two experiments from each Part – A,
Part – B and Part – C. Five out of six experiments are to be conducted under Part – D.

1 Part - A Over Current Relay: (a)Inverse Definite Minimum Time(IDMT)Non- Directional Characteristics (b) Directional Features (c) IDMT Directional.

2 IDMT Characteristics of Over Voltage or Under Voltage Relay (Solid State or Electromechanical type).

3 Operation of Negative Sequence Relay.

4 Part - B Operating Characteristics of Microprocessor Based (Numeric) Over –Current Relay.

5 Operating Characteristics of Microprocessor Based (Numeric) Distance Relay.

6 Operating Characteristics of Microprocessor-Based (Numeric) Over/Under Voltage

7 Part - C RGeelnaeyr.ation Protection: Merz Price Scheme.

8 Feeder Protection against Faults.

9 Motor Protection against Faults.

10 Part - D Spark Over Characteristics of Air subjected to High Voltage AC with Spark Voltage Corrected to Standard Temperature and Pressure for Uniform [as per IS1876: 2005]and Nonuniform
[as per IS2071(Part 1) : 1993] Configurations: Sphere – Sphere, Point –Plane,

11 PSopianrtk–OPvoeirnCt ahnadraPctlearniesti–csPloafnAe.ir subjected to High voltage DC.

12 Measurement of HVAC and HVDC using Standard Spheres as per IS 1876 :2005

13 Measurement of Breakdown Strength of Transformer Oil as per IS 1876 :2005

14 Field Mapping using Electrolytic Tank for any one of the following Models: Cable/ Capacitor/

15 (Tar)anGsemniesrsaitoinonLionfe/stSapnhdearred Gliagph.tuning impulse voltage and to determine efficiency and energy of impulse generator. 

(b) To determine 50% probability flashover voltage for air insulation subjected to impulse voltage.

Course Outcomes: At the end of the course the student will be able to:

• Verify the characteristics of over current, over-voltage, under-voltage and negative sequence relay both electromagnetic and static type.
• Verify the characteristics of microprocessor-based over-current, over-voltage, under-voltage relays and distance relay.
• Show knowledge of protecting generators, motors, and feeders.
• Analyze the spark over characteristics for both uniform and non-uniform configurations using High A and DC voltages.
• Measure high AC and DC voltages and breakdown strength of transformer oil.
• Draw electric field and measure the capacitance of different electrode configuration models.
• Show knowledge of generating standard lightning impulse voltage to determine efficiency, the energy of impulse generator, and 50% probability flashover voltage for air insulation.

Conduct of Practical Examination:

1. All laboratory experiments are to be included for practical examination.
2. Breakup of marks and the instructions printed on the cover page of the answer script to be strictly adhered by the examiners.
3. Students can pick one experiment from the questions lot prepared by the examiners.
4. Change of experiment is allowed only once and 15% Marks allotted to the procedure part to be made
zero.