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OPTIMUM SPECIFICATIONS FOR CURRENT TRANSFORMERS

OPTIMUM SPECIFICATIONS FOR CURRENT TRANSFORMERS. S.K.SHARMA, CEO NORTEX MARKETING. POWER. INSTRUMENT. MEASUREMENT: Tremendous value of electrical power calls for accurate measurement to ensure fair transaction.

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OPTIMUM SPECIFICATIONS FOR CURRENT TRANSFORMERS

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  1. OPTIMUM SPECIFICATIONS FOR CURRENT TRANSFORMERS S.K.SHARMA, CEO NORTEX MARKETING

  2. POWER INSTRUMENT MEASUREMENT: Tremendous value of electrical power calls for accurate measurement to ensure fair transaction. PROTECTION: Precious equipments and installations are to be safeguarded against environmental/operational hazards. ACCURACY – as per need RELIABILITY- 100%

  3. Current transformers • Low value / high significance • Key component in metering/protective schemes CTRELEYEQUIPMENT

  4. FUNCTIONS • Range extension of instruments • Standardization of instruments • Instrument security • Electrical isolation • Realization of special functions like; summation, zero-sequencing etc.

  5. AIMING AT MAXIMUM VALUE COST VALUE = ------------------------- PERFORMANCE OPTIMUM PERFORMANCE Stated by the customer Implied needs Statutory/regulatory manufacturers expertise DESIGN SPECS

  6. OPTIMUM COSTWHO can do WHAT ? PURCHASER - OPTIMUM PARAMETERS DESIGNER - OPTIMUM PERFORMANCE PRODUCER - OPTIMUM OPERATIONAL COSTS FIT – TO – USE PRODUCT

  7. Popular short cut - Over specifying ??? Margins get cascaded User • Lack of application knowledge; • Instrument charecterstics • Environment • Prospective fault • Primary conductor size Purchaser Designer Producer

  8. Cost dynamics

  9. BURDEN GUIDE

  10. ACCURACY GUIDE

  11. FURTHER READING B. Hague Instrument Transformers Pitman-1936 E.W.Golding Electrical measurements Wheeler 1993 and measuring instruments IS:2705-1993 Current Transformer-Specification BIS IS:3156-1992 Voltage Transformer-Specification BIS IS:4201-1983 Application Guide-CT BIS IS: 4146-1983 Application Guide-VT BIS

  12. Thank you for your attention! Further questions may be forwarded to, E-mail:nortex_delhi@hotmail.com sales@nortexindia.com www.nortexindia.com\FAQ

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