ELECTRICIAN

Week wise (1st Year & 2nd Year)

Video links of complete syllabi prepared by SH. AMIT KUMAR, ELECTRICIAN Instructor of GITI BARWALA (HISAR).

WEEK NO. TOPIC VIDEO LINK 
1 SCOP OF ELECTRICIAN TRADE         (विद्युत व्यवसाय में अवसर) https://youtu.be/8JgnVrgxO4g
  SAFETY SIGN (सुरक्षा चिन्ह) https://youtu.be/3B8ANCEe5Wc
  TYPE OF FIRE,TYPE OF FIRE EXTINGUISHER (आग तथा आग बुझाने वाले यंत्रों के प्रकार) https://youtu.be/mt5G9lVseto
2 FIRST AID SAFETY (प्राथमिक चिकित्सा उपाय) https://youtu.be/0n2IJjDIzAA
    https://youtu.be/Ln7Onoxjp2Y
3 CONCEPT AND ADVANTAGES OF BIS/ISI (BIS/ISI की संकल्पना तथा लाभ) https://youtu.be/r7HlszAdkU4
4_5 INTRODUCTION OF TOOLS
(औजारों का परिचय)
https://youtu.be/iUqi3qkDnsc
  WOODEN JOINTS (लकड़ी के जोड़) https://youtu.be/iu-15f5IwH0
6_7 MARKING TOOLS (अंकन औजार) https://youtu.be/juJ6-buElzo
8 ELECTRICITY (बिजली) https://youtu.be/3fyidfEggnk
    https://youtu.be/vR5B0HW9EPk
  CONDUCTOR AND INSULATOR (चालक तथा कुचालक) https://youtu.be/DVlNlVJfipM
9_10 JOINT OF ELECTRICAL CONDUCTOR (बिजली के तारों के जोड़) https://youtu.be/sITt7uSJlQw
  TECHNIQUE FOR SOLDERING (टांकने की तकनीक) https://youtu.be/AcTGkvjjL0c
11_12 UNDERGROUND CABLES(भूमिगत केबल) https://youtu.be/g3qW112dfKw
13_14 OHM'S LAW (ओह्म का नियम) https://youtu.be/4PC1YEJHdbQ
  KIRCHHOFF'S LAW (किरचॉफ के नियम)  
  KCL https://youtu.be/Jd_RLPy95zc
  KVL https://youtu.be/8yGV6xsd4hk
15 WHEATSTONE BRIDGE (व्हीटस्टोन सेतु) https://youtu.be/yjfKts8tCDU
  LAW OF RESISTOR (प्रतिरोध के नियम) https://youtu.be/qpE4tSigkDg
  SERIES PARALLEL COMBINATION OF RESISTANCE(प्रतिरोध का श्रृंखला तथा समानांतर क्रम) https://youtu.be/kCdukr9ibuA
16_17 MAGNETIC MATERIAL (चुंबकीय पदार्थ) https://youtu.be/Kf5E4A0ASks
  ELECTRO MAGNETISM                          (इलेक्ट्रो मैग्नेटिज्म) https://youtu.be/YBo3FLNVGJM
  CAPACITOR AND IT'S TYPES    (संधारित्र एवं उसके प्रकार) https://youtu.be/R4oejVfW4ps
    https://youtu.be/hiG9bfbTFlE
18_19 AC DC SYSTEM https://youtu.be/AMTCJbTm-NU
  POWER (शक्ति) https://youtu.be/-hpVjvOoXEU
  SINGLE AND THREE PHASE SYSTEM https://youtu.be/26aDiacwH4A
20_21 ADVANTAGES OF AC POLY PHASE SYSTEM(बहुफेज प्रणाली के लाभ) https://youtu.be/V-HHG3n1TKY
  THREE PHASE STAR AND DELTA CONNECTION  (तीन फेस स्टार  एवं डेल्टा संयोजन)  https://youtu.be/f5v1j_jpAeI
  PHASE SEQUENCE METER                  (चरण अनुक्रम मीटर) https://youtu.be/9BiuVH2swR8
22_23 PROJECT WORK
24_26 REVISION
27-28 LAW OF ELECTROLYSIS             ‌          (विद्युत अपघटन नियम) https://youtu.be/E_Qj5Dbp3uM
  CELLS(सेल) https://youtu.be/Y8QHW81jRkc
    https://youtu.be/2VS_C9ruMIw
  CONNECTION OF CELLS                       (सेलौं का संयोजन) https://youtu.be/TK0cDYkC4TA
    https://youtu.be/jqXfrSZS2xQ
  SOLAR CELL  (सोलर सेल) https://youtu.be/XPKK55PlyIw
29_30 DOMESTIC AND INDUSTRIAL WIRING ( घरेलू व औद्योगिक वायरिंग) https://youtu.be/uFtnjs_3hRs
  DOMESTIC WIRING ACCESSORIES AND TYPES OF SWITCH (घरेलू वायरिंग का सामान तथा स्विचों के प्रकार) https://youtu.be/uFtnjs_3hRs
  MCB https://youtu.be/D3UOUT8r8No
  RCCB https://youtu.be/4Wzob50E8Yk
  MCCB https://youtu.be/APkLjcensVU
  ELCB https://youtu.be/NxH5RESnB9w
31_32 DIFFERENT TYPES OF WIRING           (वायरिंग के प्रकार) https://youtu.be/f0y1YTqyUI0
33_35 LOAD CALCULATION (लोड गणना) https://youtu.be/5pafXBes0Yc
  SPECIAL WIRING CKT.  
  GODOWN WIRING(गोदाम वायरिंग) https://youtu.be/xW_507n3DkI
  TUNNEL WIRING(सुरंग वायरिंग) https://youtu.be/v3y6cM3Qbkk
36 EARTHING (अर्थिंग) https://youtu.be/gSaxl_17SWI
  TYPE OF EARTHING (अर्थिंग के प्रकार) https://youtu.be/MjAjNkWR5d4
37_38 ILLUMINATION (प्रदीपन) https://youtu.be/Ph14_qAS190
    https://youtu.be/dKvmNyocSPw
    https://youtu.be/ReF7oiST60c
39_40 CLASSIFICATION OF ELECTRICAL MEASURING INSTRUMENTS                          (विद्युतीय मापन यंत्र के प्रकार) https://youtu.be/pCxTtJfkjAA
    https://youtu.be/tygE8zSD3mI
    https://youtu.be/fng04VpuLWs
    https://youtu.be/kKPqeoEZgoo
41 ERROR IN MEASUREMENTS।              (मापन में त्रुटियां) https://youtu.be/tsnuFOfdEVU
42_44 VARIOUS ELECTRICAL EQUIPMENT  
  ELECTRIC IRON https://youtu.be/d8pYnhZs-kE
  WORKING OF THERMOSTAT https://youtu.be/0gLVNvisLsg
  WASHING MACHINE https://youtu.be/1I26M4uuI1s
  CONCEPT OF NEUTRAL AND EARTHING https://youtu.be/Rydi3AqMgcw
45_46 TRANSFORMERS  
  INTRODUCTION AND WORKING https://youtu.be/b5PpFRCA1Ks
  CORE https://youtu.be/p-Rz69K9vOA
  ADVANTAGES AND EMF EQUATION https://youtu.be/5mLcCM4UTDQ
  IMPORTANT DEFINITION https://youtu.be/-a3U-TmCjNU
  LOSES https://youtu.be/TiwW0OGBqZA
    https://youtu.be/mfXBaibVHNY
  TEST ON TRANSFORMER https://youtu.be/WFARNhxi7VA
  INSTRUMENT TRANSFORMER https://youtu.be/OdXvQQd9RRs
    https://youtu.be/jSe_aHy19N4
  TYPES OF TRANSFORMERS https://youtu.be/ML_CQhaASNY
47 TYPE OF COOLING https://youtu.be/bfRH21GwVhc
  TESTING OF TRANSFORMER OIL https://youtu.be/QXgROCiv55s
48_49 PROJECT WORK  
50_51 REVISION  
52 EXAMINATION  
2nd Year     
53_54 ROTATING ELECTRIC MACHINE https://youtu.be/5kzWC84_DOg
  DC GENERATOR https://youtu.be/Nxdj36XLMSk
    https://youtu.be/F5CtT52Ueuw
  EMF EQUATION https://youtu.be/gZMDTvD-NWo
  TYPES https://youtu.be/EcRlkEuLCqI
    https://youtu.be/U88sCYFEu_I
55_56 ARMATURE REACTION https://youtu.be/jpeaVqgKAhk
  LOSES https://youtu.be/B0ltlw_QY1M
57_58 DC MOTOR https://youtu.be/G5kOCpch-UA
  BACK EMF https://youtu.be/7D-Ed_K-O94
  DC MOTOR STARTER https://youtu.be/gBY9TvTtj0g
    https://youtu.be/PEXFIW7K8GY
  LOSES https://youtu.be/xMUbvn23Eqo
  TYPES https://youtu.be/KbyVZQc94Wo
  CHANGE OF DIRECTION OF ROTATION https://youtu.be/a4eAsKlocE0
59_60 SPEED CONTROL OF DC MOTOR https://youtu.be/PleUaHavBTI
  LAP WINDING https://youtu.be/KOxp1zNM9ic
  WAVE WINDING https://youtu.be/j9J6ghPZsac
  DEFINITION ABOUT WINDINGS https://youtu.be/1KXFtFG15bg
61_62 THREE PHASE INDUCTION MOTOR https://youtu.be/gVKH_wL4H58
    https://youtu.be/v6Sc7a2Zzus
  TYPES  
  SQUIRREL CAGE  https://youtu.be/KkeJ_ijqp7U
  SLIP RING https://youtu.be/mT-qJNVs0ME
  STARTERS  
  DOL STARTER https://youtu.be/WZB6-4KKyxo
  STAR-DELTA STARTER https://youtu.be/kDDbHg5H3dg
  AUTO TRANSFORMER STARTER https://youtu.be/ct4B-4JOkPM
63_64 LOSES https://youtu.be/7Ex5y3AkWOw
  SPEED CONTROL METHOD  https://youtu.be/GnN_ghRctNA
  BRAKING SYSTEM OF MOTOR https://youtu.be/ZP_nZue7Ito
65 WINDING https://youtu.be/qYwklqEHlUk
    https://youtu.be/4qVzo4ieefg
    https://youtu.be/aPucheok17E
    https://youtu.be/Mo7gyMAsluY
  WINDING TESTING https://youtu.be/O3-NckIY9GU
66_67 SINGLE PHASE MOTOR https://youtu.be/eufMi_FxyTo
  APPLICATION https://youtu.be/U8jlkHAR2YA
  TYPES https://youtu.be/oO9VAGk5pwE
    https://youtu.be/KgaDkk8WYY4
    https://youtu.be/b-95gpi3g2I
68_69 UNIVERSAL MOTOR https://youtu.be/X-huaypkByk
  SPEED CONTROL OF UNIVERSAL MOTOR https://youtu.be/get2BslVjpM
70_71 ALTERNATOR https://youtu.be/TOYibX7Sk8E
    https://youtu.be/Aj1-soYN7-w
72 SYNCHRONOUS MOTOR https://youtu.be/RtRe_drrmOc
  STARTING OF SYNCHRONOUS MOTOR https://youtu.be/Az-9X6SFtsQ
73 MG SET https://youtu.be/STmpMQrN-o0
74_75 PROJECT WORK
76_78 REVISION
79 resistor (प्रतिरोधक) https://youtu.be/K9ZDArXh7yk
    https://youtu.be/q7QqtrOova8
  ATOMIC STRUCTURE (नाभिकीय संरचना) https://youtu.be/6A8BDrt6hRs
  SEMICONDUCTOR अर्धचालक https://youtu.be/NKYBc7u6hO4
    https://youtu.be/DvYfs6rXKuE
80_81 P-N JUNCTION, BIASING P-N जंक्शन https://youtu.be/hKGJoW_u6wo
  CHARACTERISTICS OF DIODE डायोड की विशेषताएं https://youtu.be/xPm161_eLtc
  ZENER DIODE (जीनर डायोड) https://youtu.be/Kj6Vpm6m9lU
  LIGHT EMITTING DIODE (LED) https://youtu.be/tPFI2_PdCYA
  PHOTO DIODE https://youtu.be/idyOIr-m18A
  RECTIFIER (दिष्टकारी) https://youtu.be/yaUMBKjkOjg
    https://youtu.be/JG3asbRqHDs
  FILTERS (फिल्टर) https://youtu.be/0XtBatAPmQ8
  TRANSISTOR  (ट्रांजिस्टर) https://youtu.be/dTx9VKV0hjo
    https://youtu.be/d2lmY-AMs24
  AMPLIFIER (एम्पलीफायर) https://youtu.be/sGv1kdO1Lkc
    https://youtu.be/G6Uee9VAI6k
82_83 INTRODUCTION OF POWER ELECTRONICS.                                        (पावर इलेक्ट्रॉनिक्स का परिचय) https://youtu.be/eDUXCw84U2Q
  POWER SUPPLY https://youtu.be/gL2SAbB_MKU
  DIGITAL ELECTRONICS   
  NUMBER SYSTEM (नंबर सिस्टम) https://youtu.be/kAnBaQoJkpo
  LOGIC GATES (लाॅजिक गेट) https://youtu.be/AT_GjUjNFpo
    https://youtu.be/EBk8c-OOdpQ
84_85 OSCILLOSCOPE (दोलनदर्शी) https://youtu.be/_aLN_Z5B9vU
  SCR https://youtu.be/mTo-46GbUIs
  DIAC https://youtu.be/mZJSm4-_wSU
  TRIAC https://youtu.be/FquC5eY0mGk
  IGBT https://youtu.be/ZT6TfaooNEk
  MULTIVIBRATORS (बहुकंपित्र) https://youtu.be/uJ_c6ElmJiA
    https://youtu.be/t72T5p56aGs
86_87 ISOLATOR https://youtu.be/TOlSRaC6miU
  FUSES https://youtu.be/V0bcdeu0dR0
  RELAYES https://youtu.be/fIknwz1IyuI
  TIMER https://youtu.be/tYVQ0JoAArw
88_89 DISTRIBUTION AND TRANSMISSION https://youtu.be/Y7_zKCnGgsI
  THIMBLES AND OTHER CONNECTING MATERIAL https://youtu.be/0P-3vcvykYY
90_91 AC DRIVE https://youtu.be/fNEEa4-dvoY
  DC DRIVE https://youtu.be/945RHBUckQA
  VVVF/VFD https://youtu.be/L-l0G_JfbDY
92_93_94 STABILIZER https://youtu.be/MutjK0_v0l4
  BATTERY CHARGER https://youtu.be/nsf2n1c05Ws
  UPS https://youtu.be/eSeKwoAotlE
  INVERTER https://youtu.be/IBdQucgcJ40
  EMERGENCY LIGHT https://youtu.be/9f20R1lLtic
  PREVENTIVE AND BREAKDOWN MAINTENANCE https://youtu.be/NR4JW8hhMCM
95 CONVENTIONAL AND NON CONVENTIONAL ENERGY SOURCES (परंपरागत तथा गैर-परंपरागत ऊर्जा के स्रोत) https://youtu.be/dnA0nshoxgQ
    https://youtu.be/hr2sNfqFBsM
  HYDRO POWER STATION(पन बिजली घर) https://youtu.be/f7kJ0z11lws
  THERMAL POWER STATION https://youtu.be/q0G1fz9kx04
96 SOLAR ENERGY https://youtu.be/0oK_VQnPDuY
  WIND POWER GENERATION https://youtu.be/grppmyKXY_Q
97 TRANSMISSION AND DISTRIBUTION NETWORK https://youtu.be/Y7_zKCnGgsI
  LINE INSULATOR https://youtu.be/k78GHf-aT7M
98 SAFETY PRECAUTIONS IE RULES           (IE सुरक्षा नियम) https://youtu.be/DQcYtWmoZEg
  MAXIMUM DEMAND (अधिकतम मांग) https://youtu.be/Gs9r1HpbDpo
  DIVERSITY FACTOR (विविधता कारक) https://youtu.be/1d5SyDBNFZs
99 RELAYS https://youtu.be/fIknwz1IyuI
  CIRCUIT BREAKERS https://youtu.be/eit5LhDAZ5A
    https://youtu.be/hjrw98GoHJk
100_101 PROJECT WORK
102_103 REVISION
104 EXAMINATION

video link (Practical)

Video links of complete syllabi prepared by SH. AMIT KUMAR & Vijay Kumar, ELECTRICIAN Instructor of GITI BARWALA (HISAR).

 

Week No. Trade Practical  Topics to be covered Video Link
1 1. Visit various sections of the institutes and location of electrical installations.  https://youtu.be/qMCDYeLNbjQ
2. Identify safety symbols and hazards.  https://youtu.be/7SAjm7qtYOw 
https://youtu.be/2nZ9lS6VHFU
3. Preventivemeasures for electrical accidents and practice steps to be taken in such accidents.  https://youtu.be/P0cM8V1CcQU
4. Practice safe methods of fire fighting in case of electrical fire.  https://youtu.be/hm8Tene9Eqc
5. Use of fire extinguishers.  https://youtu.be/_eM_1jBynlI
2 6. Practice elementary first aid.  https://youtu.be/xkqlvM7SEYw
7. Rescue a person and practiceartificial respiration.  https://youtu.be/jQYJF_foswg
8. Disposal procedure of waste materials.  https://youtu.be/bEw34DyFBS4
9. Use of personal protective equipments.  https://youtu.be/7emUloowPl0
10. Practice on cleanliness and procedure to maintain it.  https://youtu.be/YdABNuOwVHo
3 11. Identify trade tools and machineries.  https://youtu.be/iUqi3qkDnsc
12. Practice safe methods of lifting and handling of tools & equipment.  https://youtu.be/pDAyn5pqSLE
13. Select proper tools for operation and precautions in operation.  https://youtu.be/0x2uV5RTB8Q
14. Care & maintenance of trade tools https://youtu.be/Clsipj4bwmo
4,5 15. Operations of allied trade tools.  https://youtu.be/_r7Hq8X8waQ
16. Workshop practice on filing and hacksawing.  https://youtu.be/0izVoBcNS-o
17. Prepare hand coil winding assembly.  https://youtu.be/P36v02bkCKo
18. Practice on preparing T-joint, straight joint and dovetail joint on wooden blocks.  https://youtu.be/IR4z8Flzqvo
19. Practice sawing, planing, drilling and assembling for making a wooden switchboard.  https://youtu.be/T_fX0f9gjJo
6,7 20. Practice in marking and cutting of straight and curved pieces in metal sheets, making holes, securing by screw and riveting.  https://youtu.be/pJTZe8QSzWc
21. Workshop practice on drilling, chipping, internal and external threading of different sizes.  https://youtu.be/CWSVFjXc138
22. Practice of making square holes in crank handle.  https://youtu.be/nk_ZVe0d1OA
23. Prepare an open box from metal sheet.  https://youtu.be/9ZSBirHGONs
8 24. Prepare terminations of cable ends  https://youtu.be/ewXvaGbo4bA
25. Practice on skinning, twisting and crimping.  https://youtu.be/QGcKSh6GEps
26. Identify various types of cables and measure conductor size using SWG and micrometer.  https://youtu.be/dNCj6fPW7uA
9,10 27. Make simple twist, married, Tee and western union joints.  https://youtu.be/sITt7uSJlQw
28. Make britannia straight, britannia Tee and rat tail joints.  https://youtu.be/f1TT6r3qQgE
29. Practice in Soldering of joints / lugs.  https://youtu.be/76plvSCl6UY
11,12 30. Identify various parts, skinning and dressing of underground cable.  https://youtu.be/52_e5svGi54
31. Make straight joint of different types of underground cable.  https://youtu.be/9WwoljP-7Uw
32. Test insulation resistance of underground cable using megger.  https://youtu.be/Pkn0qSeVOB0
33. Test underground cables forfaults and remove the fault.  https://youtu.be/LzKZNhkjoA8
13,14 34. Practice on measurement of parameters in combinational electrical circuit by applying Ohm’s Law for different resistor values and voltage sources and analyse by drawing graphs.  https://youtu.be/zn308fHapZw
35. Measure current and voltage in electrical circuits to verify Kirchhoff’s Law  https://youtu.be/GeET9Z1dbnA
36. Verify laws of series and parallel circuits with voltage source in different combinations.  https://youtu.be/hRmP14lO-rU
37. Measure voltage and current against individual resistance in electrical circuit  https://youtu.be/hzmPfnNiEM4
38. Measure current and voltage and analyse the effects of shorts and opens in series circuit.  https://youtu.be/JNGIo3ZGYxw
39. Measure current and voltage and analyse the effects of shorts and opens in parallel circuit.   
15 40. Measure resistance using voltage drop method.  https://youtu.be/eNxktDf5atI
41. Measure resistance using wheatstone bridge.  https://youtu.be/vcozJa3EOIc
42. Determine the thermal effect of electric current.  https://youtu.be/uSbyHcYb850
43. Determine the change in resistance due to temperature. https://youtu.be/RLRYosiKa4k
44. Verify the characteristics of series parallel combination of resistors.  https://youtu.be/heyaGvfDU4Y
16,17 45. Determine the poles and plot the field of a magnet bar.  https://youtu.be/0iEOXzv_PVw
46. Wind a solenoid and determine the magnetic effect of electric current.  https://youtu.be/MmkTeDowFZo
47. Measure induced emf due to change in magnetic field.  https://youtu.be/Z_UHixEy7xU
48. Determine direction of induced emf and current.  https://youtu.be/ddT7Wrzkn0M
49. Practice on generation of mutually induced emf.  https://youtu.be/ZDBfDTEMGaQ
50. Measure the resistance, impedance and determine inductance of choke coils in different combinations.  https://youtu.be/KHq5GoAbAy4
51. Identify various types of capacitors, charging / discharging and testing.  https://youtu.be/BEilfM1n1h4
52. Group the given capacitors to get the required capacity and voltage rating.  https://youtu.be/MZ_CqtDJLmI
18,19 53. Measure current, voltage and PF and determine the characteristics of RL, RC and RLC in AC series circuits.  https://youtu.be/f4cdrSG2yp4
54. Measure the resonance frequency in AC series circuit and determine its effect on the circuit.  https://youtu.be/MxmByz6fTlE
55. Measure current, voltage and PF and determine the characteristics of RL, RC and RLC in AC parallel circuits. (08 Hrs) https://youtu.be/BoB9ETxkR6s
56. Measure the resonance frequency in AC parallel circuit and determine its effects on the circuit.  https://youtu.be/Ce3K0XwiuRU
57. Measure power, energy for lagging and leading power factors in single phase circuits and compare characteristic graphically.  https://youtu.be/MX0yzrc33BI
58. Measure Current, voltage, power, energy and power factor in three phase circuits.  https://youtu.be/UT3OssKnu9U
59. Practice improvement of PF by use of capacitor in three phase circuit. https://youtu.be/6DGp4NqwA00
20,21 60. Ascertain use of neutral by identifying wires of a 3-phase 4 wire system and find the phase sequence using phase sequence meter.  https://youtu.be/9BiuVH2swR8
61. Determine effect of broken neutral wire in three phase four wire system. https://youtu.be/7R6aSQmpjWQ
62. Determine the relationship between Line and Phase values for star and delta connections.  https://youtu.be/rHnC-1gOG0E
63. Measure the Power of three phase circuit for balanced and unbalanced loads.  https://youtu.be/8S3n9VPMSaM
64. Measure current and voltage of two phases in case of one phase is short-circuited in three phase four wire system and compare with healthy system. https://youtu.be/uboHoN2Uit4
22,23 Project work / Industrial visit Broad Areas: a) Prepare and assemble a test board with switches, plug socket, lamp holder etc. b) Temperature controlled system for switching ‘ON’ and ‘OFF’ of any circuit using bi-metallic strip. c) Series/ parallel combinational circuits  
24,25,26 Revision  
27,28 65. Use of various types of cells.  https://youtu.be/oHBpu3WkI34
66. Practice on grouping of cells for specified voltage and current under different conditions and care.  https://youtu.be/dSZdDEGtYyw
67. Prepare and practice on battery charging and details of charging circuit.  https://youtu.be/XixhpeoVhWY
68. Practice on routine, care/ maintenance and testing of batteries.  https://youtu.be/0_AFtVoC_ro
69. Determine the number of solar cells in series / parallel for given power requirement.  https://youtu.be/uJ4Br5GKKaA
29,30 70. Identify various conduits and different electrical accessories.  https://youtu.be/lYdhe6cCMCU
71. Practice cutting, threading of different sizes & laying Installations.  https://youtu.be/PNKvVjx44cc
72. Prepare test boards / extension boards and mount accessories like lamp holders, various switches, sockets, fuses, relays, MCB, ELCB, MCCB etc.  https://youtu.be/V9wQGoKauH4
31,32 73. Draw layouts and practice in PVC Casing-capping, Conduit wiring with minimum to more number of points of minimum 15 mtr length.  https://youtu.be/SCwWFvJAKxo
74. Wire up PVC conduit wiring to control one lamp from two different places.  https://youtu.be/Rc0YtchABrc
75. Wire up PVC conduit wiring to control one lamp from three different places.  https://youtu.be/_oR2onZ8ci0
76. Wire up PVC conduit wiring and practice control of sockets and lamps in different combinations using switching concepts. https://youtu.be/Wkw1US769eI
33,34,35 77. Wire up the consumers main board with ICDP switch and distribution fuse box.  https://youtu.be/RUxxpRoGGHs
78. Prepare and mount the energy meter board.  https://youtu.be/6DT4rIAcfUY
79. Estimate the cost/bill of material for wiring of hostel/ residential building and workshop.  https://youtu.be/oeWj_yhIuPo
80. Practice wiring of hostel and residential building as per IE rules.  https://youtu.be/epBooJ0zDys
81. Practice wiring of institute and workshop as per IE rules.  https://youtu.be/TT8tEjfV3R0
82. A)   Practice testing / fault detection Identifying the Faults on a Live Circuit Board.                                                                              B) इस्त्री(आयरन या प्रेस) को कैसे ठीक करते हैं , आयरन की टेस्टिंग कैसे करते हैं https://youtu.be/FSOyNgKYMG4
https://youtu.be/udw3dOd1xNc
    https://youtu.be/HGebLAcf9Oc
  83. Prepare pipe earthing and measure earth resistance by earth tester / megger.  https://youtu.be/OfZeIKFtH1M
36   https://youtu.be/6RJnsa83xTA
84. Prepare plate earthing and measure earth resistance by earth tester / megger.  https://youtu.be/ax-KUL17YJ4
https://youtu.be/K7-PHwGFXsU
85. Test earth leakage by ELCB and relay.  https://youtu.be/HnfovkcgFZY
37,38 86. Install light fitting with reflectors for direct and indirect lighting.  https://youtu.be/icOTXaDcDYk
87. Group different wattage of lamps in series for specified voltage.  https://youtu.be/U5d0hNvIGKg
88. Practice installation of various lamps e.g. fluorescent tube, HP mercury vapour, LP mercury vapour, HP sodium vapour, LP sodium vapour, metal halide etc.  https://youtu.be/U5u3PTjP8Xk
https://youtu.be/_BMb72WEtgM
https://youtu.be/pKAazV1xRRs
89. Prepare decorative lampcircuit using drum switches.  https://youtu.be/6GVYeVUI5vM
90. Prepare decorative lamp circuit to produce rotating light effect/running light effect.  https://youtu.be/KC3WhVxsQ9Y
91. Install light fitting for show case lighting.  https://youtu.be/g-Oxuz5A7qs
39,40 92. Practice on various analog and digital measuring Instruments. https://youtu.be/fgb0PSpr-jg
93. Practice on measuring instruments in single and three phase circuits e.g. multi-meter, Wattmeter, Energy meter, Phase sequence meter and Frequency meter etc.  https://youtu.be/A9eiuZwiMFY
https://youtu.be/8YRJ6F5NgxQ
https://youtu.be/9BiuVH2swR8
https://youtu.be/qRUt_Epp900
94. Measure power in three phase circuit using two wattmeter methods.  https://youtu.be/OpZnn1Wsy2g
95. Measurement of Power and Power Factor using 3-ammeter method-Working  https://youtu.be/8owllQP2T7k
https://youtu.be/xkC0d16AZZ0
96. Measure electrical parameters using tong tester in three phase circuits.  https://youtu.be/UYUgeGCJtyM
41 97. Practice Moving Iron Instrument Working Principle, Construction, Advantage and Disadvantages https://youtu.be/wEXTOBZN1T4
98. Determine errors in resistance measurement by voltage drop method.  https://youtu.be/eNxktDf5atI
99. Test single phase energy meter for its errors.  https://youtu.be/1zloL5Pu_RA
  100.Dismantle and assemble electrical parts of various electrical  cooking range,                                            https://youtu.be/GpxW9qIcXZM
  Dismantle and assemble electrical parts of various electrical  geyser      https://youtu.be/1nfDVFwM_lU
  Dismantle and assemble electrical parts of various electrical washing machine https://youtu.be/Ceos3dVI_nI
42,43,44 Dismantle and assemble electrical parts of various electrical pump set.  https://youtu.be/GP9Pd8Su31o
101. Service and repair of bell/ buzzer.  https://youtu.be/UcWR5eneVLU
102. Service and repair of electric iron, electric kettle,.  https://youtu.be/3uHCM61dDK4
Service and repair of  electric kettle.  https://youtu.be/4QnpLlT5WxM
103. Service and repair of induction heater and oven.  https://youtu.be/e3sHB3cyf20
104. Service and repair of mixer and grinder.  https://youtu.be/DWfR1gB5XhM
105. Service and repair of washing machine.  https://youtu.be/vwE7PUVzrLk
45,46 106. Verify terminals, identify components and calculate transformation ratio of single phase transformers.  https://youtu.be/7JRUgQPzxnA
107. Perform OC and SC test to determine and efficiency of single phase transformer.  https://youtu.be/o8vLnSGOmpA
108. Determine voltage regulation of single phase transformer at different loads and power factors. https://youtu.be/NqNc862uy1M
109. Perform series and parallel operation of two single phase transformers.  https://youtu.be/FVXcXFsY-fc
110. Verify the terminals and accessories of three phase transformer HT and LT side.  https://youtu.be/94WvB9Gx5_Q
https://youtu.be/oc2u0TjLT9s
47 111. Perform 3 phase operation (i) delta-delta (ii) delta-star (iii) star-star (iv) star-delta by use of three single phase transformers.  https://youtu.be/eBacGqOimbQ
112. Perform testing of transformer oil.  https://youtu.be/YTp-SjvaA5Q
113. Practice on winding of small transformer.  https://youtu.be/IUJnZjU0-pk
114. Practice of general maintenance of transformer.  https://youtu.be/hrqmkiXpz34
48,49 Project work / Industrial visit Broad Areas: a) Overload protection of electrical equipment b) Automatic control of street light/night lamp c) Fuse and power failure indicator using relays d) Door alarm/indicator e) Decorative light with electrical flasher  
50,51 Revision  
52 Examination  
53,54 115. Identify terminals, parts and connections of different types of DC machines.  https://youtu.be/OkC1E5GFtvE
116. Measure field and armature resistance of DC machines. https://youtu.be/dgkYbQVdoJE
117. Determine build up voltage of DC shunt generator with varying field excitation and performance analysis on load.  https://youtu.be/aatNvPh9e8o
118. Test for continuity and insulation resistance of DC machine.  https://youtu.be/dgkYbQVdoJE
119. Start, run and reversedirection of rotation of DC series, shunt and compound motors.  https://youtu.be/yGcUv_QwGNs
55,56 120. Perform no load and load test and determine characteristics of series and shunt generators.  https://youtu.be/_aEz519HeLs
121. Perform terminal of compound generators.  https://youtu.be/m7_DfLqVGF0
122. LOAD TEST OF DC COMPOUND GENERATOR https://youtu.be/vLXs2Zb9_4w
  123. Practice dismantling and assembling in DC compound generator https://youtu.be/mqdiN8LbyE0
57,58 124. Conduct performance analysis of DC shunt motor.  https://youtu.be/gtUt7rCTMgI
125. Dismantle and identify parts of three point DC motor starters.  https://youtu.be/jXXOIpYDN54
Dismantle and identify parts of four point DC motor starters.  https://youtu.be/TP82k_43vBM
126. Assemble, Service and repair three point and four point DC motor starters https://youtu.be/hbkwJhZRz2c
127. Practice maintenance of carbon brushes, brush holders, Commutator and slip-rings.  https://youtu.be/6mONe-ZC0SA
59,60 128. Perform speed control of DC motors - field and armature control method.  https://youtu.be/ehHMNGDfEuE
129. Dismantle and identify parts of four point DC motor starters.  https://youtu.be/TP82k_43vBM
130. Perform DC machine Armature winding. https://youtu.be/Ao3B4wcZkg8
61,62 131. Identify parts and terminals of three phase AC motors.  https://youtu.be/FsI11JT7Ar4
132. Make an internal connection of automatic star-delta starter with three contactors.  https://youtu.be/OtydNtCxYQI
133. Connect, start and run three phase induction motors by using DOL, star-delta and auto-transformer starters.   
DOL (DIRECT ON LINE) STARTER https://youtu.be/lItRc1skMLM
STAR DELTA STARTER https://youtu.be/SAbJfiHbw8Y
AUTO TRANSFORMER STARTER https://youtu.be/PfoBSVRo94E
134. Connect, start, run and reverse direction of rotation of slip-ring motor through rotor resistance starter and determine performance characteristic. https://youtu.be/l5BlFVgQP_Y
63,64 135. Determine the efficiency of squirrel cage induction motor by brake test.  https://youtu.be/nVzLrTcpoKg
136. Determine the efficiency of three phase squirrel cage induction motor by no load test and blocked rotor test.  https://youtu.be/VzXAYyQlZQk
137. Measure slip and power factor to draw speed-torque (slip/torque) characteristics.  https://youtu.be/tON5-bICZog
138. Test for continuity and insulation resistance of three phase induction motors.  https://youtu.be/84GUroyW4gQ
139. Perform speed control of three phase induction motors by various methods like rheostatic control, autotransformer etc.  https://youtu.be/CHWuZHw3zOg
65 140. Perform winding of three phase AC motor by developing connection diagram, test and assemble.  https://youtu.be/MspweNhYuow
141. Maintain, service and troubleshoot the AC motor starter.  https://youtu.be/3l1Po6rX1sI
66,67 142. Identify parts and terminals of different types of single phase AC motors.  https://youtu.be/gWoZZI1Lkwg
143. Install, connect and determine performance of single phase AC motors. https://youtu.be/KdKk2JPEkI4
144. Start, run and reverse the direction of rotation of single phase AC motors.  https://youtu.be/vE96TySqXGk
145. Practice on speed control of single phase AC motors.  https://youtu.be/Qr7Ca4FUpa0
146. Compare starting and running winding currents of a capacitor run motor at various loads and measure the speed.  https://youtu.be/KGawz_ED2hQ
68,69 147. Carry out maintenance, service and repair of single phase AC motors.  https://youtu.be/Jih2OHxTVcc
148. Practice on single/double layer and concentric winding for AC motors, testing and assembling.  https://youtu.be/N-oAbjaTMhc
149. Connect, start, run and reverse the direction of rotation of universal motor.  https://youtu.be/-oGLXMkMUwQ
150. Carry out Armature checking easy way https://youtu.be/b6gzbIY29SY
70,71 151. Install an alternator, identify parts and terminals of alternator.  https://youtu.be/zBl8ZyJD-3Y
152. Test for continuity and insulation resistance of alternator.  https://youtu.be/__58aHjHq2c
153. Connect, start and run an alternator and build up the voltage.  https://youtu.be/fBqkRvYnG5k
154. Determine the load performance and voltage regulation of three phase alternator.  https://youtu.be/cVQ-7sUK-mM
155. Parallel operation and synchronization of three phase alternators.  https://youtu.be/_NnxdPKWsIg
72 156. WORKING a synchronous motor. https://youtu.be/FgYcIgauH4M
157. Connect, start and plot V-curves for synchronous motor under different excitation and load conditions.  https://youtu.be/SHk49rSvVp8
73 158. Identify parts and terminals of MG set.  https://youtu.be/STmpMQrN-o0
159. Start and load MG set with 3 phase induction motor coupled to DC shunt generator.  https://youtu.be/usGOT_XcXxs
74,75 Project work/Industrial visit (optional) Broad Areas: a) Phase sequence checker for 3 phase supply b) Induction motor protection system c) Motor starters with protection d) Solar/wind power generation  
76,77,78 Revision  
79 160. Determine the value of resistance by colour code and identify types.  https://youtu.be/q7QqtrOova8
161. Test active and passive electronic components and its applications.  https://youtu.be/gZKWn-BkJBY
80,81 162. Determine V-I characteristics of semiconductor diode.  https://youtu.be/4wKv-DKltB8
163. Construct half wave using semiconductor diode.  https://youtu.be/yaUMBKjkOjg
FULL WAVE RECTIFIER https://youtu.be/JG3asbRqHDs
164. Check transistors for their functioning by identifying its type and terminals.  https://youtu.be/1LT6kG8kgjI
165. Bias the transistor and determine its characteristics.  https://youtu.be/I5CgLRJ6lE0
166. Use transistor as an electronic switch and series voltage regulator.  https://youtu.be/w8D8GrgHKfM
82,83 167. Operate and set the required frequency using function generator.  https://youtu.be/A-cPmN7aoO8
168. Make a printed circuit board for power supply.  https://youtu.be/QU1wyv-VqTc
169. Construct simple circuits containing UJT for triggering and FET as an amplifier.  https://youtu.be/HVPrQa0y_xM
170. Troubleshoot defects in simple power supplies.  https://youtu.be/inihJ80hfFI
84,85 171. Construct power control circuit by SCR, Diac, Triac and IGBT.  https://youtu.be/QKQv42NHatI
172. Construct variable DC stabilized power supply using IC.  https://youtu.be/G8T3b6p6FhQ
173. Practice on various logics by use of logic gates and circuits.   
AND GATE https://youtu.be/LBuLmC0chyQ
OR GATE https://youtu.be/EBlgoycFNJ8
NOT GATE https://youtu.be/nDOCqIVUdk4
NAND GATE https://youtu.be/nDOCqIVUdk4
174. OPERATIONS OF CRO.  https://youtu.be/AxaydLTYnUw
86,87 175. Design layout of control cabinet, assemble control elements and wiring accessories for:  
(i) Local and remote control of induction motor.  https://youtu.be/ocHY1inVMOk
(ii) Forward and reverse operation of induction motor.  https://youtu.be/fMJUYQAHvhY
(iii) Automatic star-delta starter with change of direction of rotation.  https://youtu.be/VHcYzfll744
(iv) Sequential control of three motors.  https://youtu.be/fklZprqbn3k
88,89 176. Carry out wiring of control cabinet as per wiring diagram, bunching of XLPE cables, channeling, tying and checking etc.  https://youtu.be/1SwUi3g5kkw
177. Mount various control elements e.g. circuit breakers, relays, contactors and timers etc.  https://youtu.be/lRKywKZu3-Q
178. Identify  sensors in control panel.  https://youtu.be/0xP6bjRRHgo
179. Test the control panel 11kv indoor control panel Testing in substation https://youtu.be/192-O1u6YTA
90,91 180. Perform speed control of DC motor using thyristors / DC drive.  https://youtu.be/zOEo25jL2Uw
181. Perform speed control and reversing the direction of rotation of AC motors by using thyristors / AC drive.  https://youtu.be/-yrOU7MgeEE
182. Construct and test a universal motor speed controller using SCR.  https://youtu.be/7Jebfh_UveE
92,3,94 183. Assemble circuits of voltage stabilizer and UPS.  https://youtu.be/SP8c7Afs7W0
184. Prepare an emergency light.  https://youtu.be/13M70p_z-2c
185. Assemble circuits of battery charger and inverter.  https://youtu.be/ZB_Dht7N1xo
186. Test, analyze defects and repair voltage stabilizer. https://youtu.be/844FLjdvARE
187. Maintain, service and troubleshoot battery charger and inverter.  https://youtu.be/9aSRZ9X6a1Q
188. Install an Inverter with battery and connect it in domestic wiring for operation.  https://youtu.be/EAXJGLWX8Ig
95 189. Draw layout of thermal power plant and identify function of different layout elements.  https://youtu.be/2FKYSwEghq4
190. Draw layout of hydel power plant and identify functions of different layout elements.  https://youtu.be/N42YH90VAzw
191. Visit to transmission / distribution substation.  https://youtu.be/LuDwCyRLQfE
192. Draw actual circuit diagram of substation visited and indicate various components.  https://youtu.be/LuDwCyRLQfE
96 193. Prepare layout plan and Identify different elements of solar power system.  https://youtu.be/h4RNBA2xFDg
194. Prepare layout plan and Identify different elements of wind power system.  https://youtu.be/58y46MZQQgU
195. Assemble and connect solar panel for illumination.  https://youtu.be/lpDgF8UPu7U
97 196. Practice installation of insulators used in HT/LT line for a given voltage range.  https://youtu.be/JqpaIJU3_1A
197. Draw single line diagram of transmission and distribution system.  https://youtu.be/_KrQO_5MYZ8
198. Measure current carrying capacity of conductor for given power supply.  https://youtu.be/PUX3tdJAf7k
  201. Practice on laying of domestic service line.  https://youtu.be/xhzz4Z8Z4oY
202. Install bus bar and bus coupler on LT line.  https://youtu.be/7ELUm1TW2HY
99 203. Identify various parts of relay and ascertain the operation.  https://youtu.be/_PqMGYLNiTI
205. Identify the parts of air circuit breaker, check its operation.  https://youtu.be/ootn-9h03Vk
206. Test tripping characteristic of circuit breaker for over current and short circuit current.  https://youtu.be/iwQCePmdfJI
207. Practice on repair and maintenance of air circuit breaker.  https://youtu.be/mfSUHXQZA74
  AIR CIRCUIT BREAKERS https://youtu.be/_h6_zwP72J4
  VACCUM CIRCUIT BREAKER https://youtu.be/_OeZUTKx73Q
1,00,101 Project work / Industrial visit Broad Areas: a) Battery charger/Emergency light b) Control of motor pump with tank level c) DC voltage converter using SCRs d) Logic control circuits using relays e) Alarm/indicator circuits using sensors  
1,02,103 Revision  
104 Examination  

 

 

 

Sr. No Name of Topic Video Link
1 10 BEST Tips & TRICKS with a sample CABLE TIES https://youtu.be/-SGk0ohzx1M
2 A.C. Generator https://youtu.be/b94blBH9b6Y
3 Battery Charging & Method https://youtu.be/V_kwtcAEics
4 Breakdown Maintenance https://youtu.be/KdLZ5u-sKZs
5 Class-2, Winding परिभाषायें pole pitch, coil pitch, pitch factor https://youtu.be/4qVzo4ieefg
6 Class-3, Winding परिभाषाएं भाग-2 Single Layer Double Layer winding https://youtu.be/aPucheok17E
7 Class-5, 3-Phase Motor Winding Calculation https://youtu.be/1dbXVYLw_l0
8 DC Generator https://youtu.be/g6gFhwjwuvs
9 Definition Lumen Intensity Lightning https://youtu.be/gyY7-2BcNp4
10 DIAC IN POWER ELECTRONICS  https://youtu.be/mZJSm4-_wSU
11 Difference between analog and digita https://youtu.be/kElIjZmkFDw
12 DIFFERENCE BETWEEN MCB AND FUSE https://youtu.be/v8WelG-ZOJ4
13 Din Rail Terminals https://youtu.be/lusnOydmLs4
14 Diodes https://youtu.be/5YXYGyd_txQ
15 ELECTRICIAN SUBSTATION EXPLAINED  https://youtu.be/LuDwCyRLQfE
16 Electro Crimp Contacts https://youtu.be/iYlmLIaH2lk
17 Energy Generator https://youtu.be/jIBMp4OvbSM
18 Fundamentals of electric drives https://youtu.be/1AT1yuQ9awM
19 GENERAL LAYOUT OF POWER PLANT https://youtu.be/ZG5U-Ep7HmA
20 HOW LIMIT SWITCH WORK http://yout.be/RluqtzFNJuY
21 How To Work With Wire Rope and Wire Rope Clips https://youtu.be/Sc71eBlwh6c
22 Icotek Grommets https://youtu.be/miOYKb9SjTw
23 Industrial Control Panel Testing https://youtu.be/DkqTkb1HPE4
24 Load calculation for house wiring https://www.youtube.com/watch?v=Iv-M8x40afY&feature=youtu.be
25 MAKE VARIABLE POWER SUPPLY  https://youtu.be/G8T3b6p6FhQ
26 method speed control of Induction Motor https://youtu.be/MiVpnhV4lxQ
27 Moving Iron Instruments https://youtu.be/nuqzLK6oIsk
28 Non-Conventional Sources of Energy  https://youtu.be/FxJojZneKTo
29 PMMC and MI Instruments full concept https://youtu.be/6I8u7lXyt04
30 POWER CONTROL USING SCR https://youtu.be/_br4ikv7AhY
31 Power Generation types https://youtu.be/EiGbrNYg38U
32 Previous year Question & Answers https://youtu.be/YiTe_Hjawss
33 Single Phase Transformer https://youtu.be/eolT3AqXy6E
34 Synchronous Motor https://youtu.be/gSsblyU07Zg
35 Test All Electronic Components with Multimeter https://youtu.be/Z_9GldZp9dE
36 Test circuit board PCB electronics component using multimeter practicaly https://youtu.be/s9g-I3t_Ki8
37 Three Phase Generator https://youtu.be/U0jqgPSRhRA
38 Three phase Induction Motor https://youtu.be/2C1dqjLna7M
39 TRAIC IN POWER ELECTRONICS  https://youtu.be/NXibgkn04v8
40 Transformer Working https://youtu.be/94WvB9Gx5_Q
41 Transistors https://youtu.be/dTx9VKV0hjo
42 TYPES OF CABLE LUG https://youtu.be/0P-3vcvykYY
43 Types of earthing https://youtu.be/05k-6six33U
44   https://youtu.be/P-eahC_PhyE
45 Using Stop Sleeves and Oval Compression Sleeves https://youtu.be/iEflhdrQp3U
46 voltage stabiliser basics https://youtu.be/1aiEKWeaeBo
47 What is VFD and How VFD working https://youtu.be/L-l0G_JfbDY
48 What is voltage stabilizer https://youtu.be/MutjK0_v0l4
49 Which wire is used in house electrical wiring? https://www.youtube.com/watch?v=P8EaWxEyQcI&feature=youtu.be
50 Wire load capacity ampere  https://www.youtube.com/watch?v=ZpakaknaUzQ&feature=youtu.be
51   https://youtu.be/1D31DwhYdh4
52   https://youtu.be/6dehGA1_5TA
53   https://youtu.be/7uua TePgMuA
54   https://youtu.be/EPLA21mAsyU
55   https://youtu.be/IPcscR9gCPE
56   https://youtu.be/JcgLWR0Kue0
57   https://youtu.be/MBT7KxQTCw0
58   https://youtu.be/NfTGl-sbSK0
59   https://youtu.be/PStqXRN29dg
60   https://youtu.be/qd-9SLckltU
61   https://youtu.be/Rc8s3TEwb2I
62   https://youtu.be/RluqtzFNJuY
63 Electrician theory https://www.youtu.be/aV516mk7vP4
64   https://www.youtu.be/eMzu2WpB6oU
65 Types of Wiring Systems and Methods of Electrical Wiring  https://www.youtube.com/watch?v=Z2EZAgcdwaU&feature=youtu.be
66 House wiring fitting material details  https://www.youtube.com/watch?v=oIKgRRW0iYU&feature=youtu.be
67 Electrician trade illumination part 1 || illumination  https://www.youtube.com/watch?v=sq2FteGyzIA&feature=youtu.be
68 Working Principle of Sodium Vapour Lamp https://www.youtube.com/watch?v=4sd6KbjB4Cw&feature=youtu.be
69 How does a Fluorescent Tube Light Work and How Starter Work https://www.youtube.com/watch?v=NhMC094a2XI&feature=youtu.be
70 house wiring connection||different types of wiring system||cleat wiring||batten wiring||conduit https://www.youtube.com/watch?v=6l_fMT3R5Bg&feature=youtu.be
71 Electrical Wiring For ITI electrical  https://www.youtube.com/watch?v=j7d0N6hYzXE&feature=youtu.be
72 Electrical wiring https://www.youtube.com/watch?v=lvWDIjWCZjc&feature=youtu.be
73 How to make sun light | LED decorating sun lights | CD decoration light  https://www.youtube.com/watch?v=mGzrx-TKJbY&feature=youtu.be
74 electrician theory https://youtu.be/C_UHCJKWdas
75 digital electronics questions https://youtu.be/rx3UDx108r8
76 transistor https://youtu.be/yj_UePXfZI0
77 triac, diac working principle https://youtu.be/wiaHv06rMuQ
78 silicon controlled rectifier https://youtu.be/lFrbdl9AsQE
79 cathode ray tube https://youtu.be/gtNxk7sfnJA
80 Relay working https://youtu.be/fIknwz1IyuI
81 Electric material and cables https://youtu.be/BsbzXQqtj44
82 difference between ferrules and lugs https://youtu.be/YZv4Mkq3T0c
83 contorl elements https://youtu.be/ZMmA2hDPunQ
84 RCCB https://youtu.be/MouzAT8qd98
85 RCCB,MCCB,MCB, https://youtu.be/nye5o9n0JJs
86 RCBO,MCB,RCCB(EL,CB) https://youtu.be/ubyYJj7yKL0
87 isolater https://youtu.be/TOlSRaC6miU
88 circuit breaker https://youtu.be/AXA0ftILgZw
89 sf6 CB OPEN AND CLOSE https://youtu.be/iW90XX7rjbc
90 different between isolater and circuit breaker https://youtu.be/ZyCToiUA1XM
91 RELAY https://youtu.be/0nf-F-ObO-Y
92 RELAY https://youtu.be/J530_QiiW7M
93 limit switch https://youtu.be/X_pxsConds0