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MeterHouseWiringPresentation (1).ppt
- 1. AWARENESS PROGRAM ON METER &HOUSE WIRING
- 2. 2 What is Electricity Meter Adevice to record Energy consumption.
- 3. 3 Meter Terminology No loadTest Starting Current Current Range Influence parameters
- 4. 4 Meter Type v/sRecording • If Load is 2 AC, 1 Geyser, 1 Fridge, 1 TV, 20 bulb • Current ……………… 38 Amp •Sr. No Rating Recording 1.0 2.5~5A ( Mech.) Read 15% 2.0 5A~10A ( Mech.) Read 26% 3.0 5A~20A (mech.) Read 53% 4.0 10~40A(Mech.) Read Okay 5.0 10~60A ( Elect.) Read Okay
- 5. 5 BSES Electronic Meters Specifications »Rating 10~60A » Starting 0.2% » Kwh and MD in KW » TOD, 6 Tariff and 6 time zone » 6 Month Billing data » RS232C » Transformer supply
- 6. 6 FAQ Why Mechanical metersread less » Influence Parameters » Age » Wear and Tear » Narrow Range » Mounting » Dust and Oil effect » Mechanical Counters
- 7. 7 FAQ • Why electronicmeters are preferred »Wide Range »Low starting current »Less effect of Influence parameters »More accurate »Tamper proof
- 8. 8 ROLE OF LED CALLED REV LED N-CUT EL
- 9. 9 ROLE OF LED CALLED High resolution out put device for meter checking
- 10. 10 ROLE OF LED REVLED * Indicates reverse flow of Energy •Reasons *Incorrect wiring *Use of un isolated *Generator/ Inverters
- 11. 11 ROLE OF LED EL •Dueto ‘unbalanced’ Curren • Needs Attention
- 12. 12 ROLE OF LED N-Cut •Indicates current without voltage on Meter • Contact discom immediately
- 13. 13 The glowing ofthe EL LED indicates the following: Earth is being used as neutral. Neutral is touching the earth. Phase / Neutral wire is touching with phase / neutral wire of the neighbour Neutral wire is interconnected with the neighbors neutral wire. KNOW ABOUT EL
- 14. 14 Wrong wiring, amongothers things can result in: Safety hazards (wires are still live, even when the main switch is off). Cause fire (if by mistake, phase and neutral wires get interchanged) Wrong Current flow (neighbours current can flow through your meter) KNOW ABOUT EL
- 15. 15 Good electronic meters haveCurrent sensors in both the Phase path, and Neutral path For Measurement, it chooses higher * of the two current. * In general Phase, current is used for measurement. However if neutral Current varies by more than 10~ 12 % then Neutral current selected
- 16. 16 Electro-mechanical Meter has Current sensoronly on one wire All Measurement based on phase wire current even when connected to neutral.
- 17. 17 Good electronic meters haveCurrent sensors in both the Phase path, and Neutral path This is an advantage of electronic meters over electromechanical meters Never buy electronic meters without this feature But neutral looping may cause the meter to “run extra”
- 18. 18 If EL isglowing, get your internal wiring checked for any leakages and other problems and also carefully look at the EL LED in the Electronic Meters. EL LED, in Electronic Meters, however small, is of great importance and consumers are advised not to ignore its usefulness. KNOW ABOUT EL
- 19. 19 HOUSE DISTRIBUTION BOX METER MCB/ Switch Fuse Neutral Phase D. Box
- 20. 20 L N NORMAL CONNECTION I red= I yellow E mech= Eelect
- 21. 21 L N NORMAL CONNECTION I red< I yellow E mech< Eelect JUMPER
- 22. 22 INPUT PHASE /NEUTRAL INTERCHANGE NO EFFECT N L NO EFFECT I red = I yellow E mech= Eelect
- 23. 23 NEUTRAL TOUCHING TOEARTH L N NO EFFECT EL glow I white < I red (EL on) Electronic = I red Mechanical = I red E mech= Eelect
- 24. 24 INTERCHANGE LINE &NEUTRAL EARTH SHIFTING N L I red > I white (EL on) Electronic = I red Mechanical = I white Mechanical read less EL glow
- 25. 25 INTERCHANGE LINE &NEUTRAL EARTH SHIFTING N L I white = 0 I red > I white (EL on) Electronic = I red Mechanical = Nil Mechanical read Nil EL glow
- 26. 26 ELECTRONIC METER RECORD CORRECTLY L NL N No Effect
- 27. 27 COMMON NEUTRAL L N L N Consumer B Consumer A Meter Recording Asper Neutral Current (Extra) As per Phase current (okay)
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- 32. 32 Wiring Defect Type OfDefects Distribution Box Wiring
- 33. 33 Distribution Box 1. Use ofDP- MCB/ Isolator 2. Ensure ELCB. 3. For more than 10 Amp ckts. Separate MCB. 4. Neutral Bus-bar. 5. Correct fuse & wire size.
- 34. 34 MCB ELCB FUSE ProperInstallation
- 35. 35 Wiring Defect Earth (NoNeutral) N-E Common N Common P Combination
- 36. 36 Wiring Defect Clamp on tester Bulbtester Line tester Electrician Kit. Tools
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- 38. 38 HOUSE DISTRIBUTION BOX METER MCB/ Switch Fuse Neutral Phase D. Box GLOW
- 39. 39 HOUSE DISTRIBUTION BOX METER MCB/ Switch Fuse Neutral Phase D. Box GLOW
- 40. 40 Wiring Defect Step-1. If numberof meters in one premise is only one, then there is no common Neutral problem.
- 41. 41 Step-2. Load On CheckI phase & I neutral If I neutral = 0 Earth is used. Phase Neutral METER EARTH EL NE Common Neutral 10A 0A
- 42. 42 Step-3. If Neutral removedfrom MCB is still load working, then it is a wiring problem. If the total MCB is off and the load is still working, then both wire are being shared
- 43. 43 Step-4. At MCB If Phaseis Off, then EL Off Means Neutral-Earth Problem. Step-5. If neighbour Phase Off Then EL Off , Means Common wire.
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- 45. 45 Step-6. If V EN≠ 0 Then Earth not touching Neutral Step-7. If common wire Disconnect one by one Neutral Ckt. From Bus-bar & see if EL off.
- 46. 46 Step-8. Once Ckt. Identifiedthen repair The defect. Step-9. Once again check all current. i.e. Ip = In
- 47. 47 HOUSE DISTRIBUTION BOX METER MCB/ Switch Fuse Neutral Phase D. Box GLOW
- 48. 48 Typical Defect Pts. CommonLoad. E.g. Motor Stair Case Light (i.e. two way switch. Common Invertors / Generator. Houses with separate power & light meter.
- 49. 49 Typical Pts. WhereEarth gets common with neutral Metallic body Appliances. Appliances connected with metal pipe line. Building RCC.
- 50. 50 !!Beware !! Meter canonly be touch by Discom (BSES) employee.
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