TS P OW P ROD UC ER stelmec beyond boundaries INDOOR INSTRUMENT TRANSFORMERs Indigenously designed indoor resin cast instrument transformers generally conforming to IS 2705-1992, IS 3156-1992 & IEC 61869-2012 in the medium voltage range of 3.6kV to 36kV guarantee reliable service, ensure functional excellence & safety. Applications • For Measuring & Protection in the electrical transmission and distribution systems. Salient Features • Compact Design – Fully encapsulated one piece • • • • • epoxy resin insulation High Electrical and Mechanical strengths Non-hygroscopic No fire risk Maintenance free Fully type tested as per IS 2705-1992 (Part I to IV) for CTs & IS 3156 – 1992 (Part I to IV) for VTs stelmec INDOOR INSTRUMENT TRANSFORMERs beyond boundaries One stop solution for reliable measurements & protection needs Resin cast indoor instrument transformers-both Current Transformers (CTs) & Voltage Transformers (VTs)-in the medium voltage range from 3.6kV to 36kV manufactured guarantee reliable service, ensure functional excellence & safety. Technical Specifications Current Transformers Details Voltage Transformers Units Parameters Rated Voltage kV 3.6, 7.2, 12, 24 & 36 Rated primary current A Up to 3000 Rated secondary current A Rated burden Units Parameters Rated Voltage kV 3.6, 7.2, 12, 24 & 36 Secondary Voltage V 110/√3 5/1 Voltage factor - 1.2 continuous VA 5 to 20 Rated burden VA Up to 100 Accuracy class - 0.2S to 1.0 Accuracy class - 0.2 to 1.0 Instrument security factor - <5 kA 3 to 44 s 3 Short time current Duration Details Manufacturing Process These transformers are manufactured under strict supervision of International standards. trained & experienced personnel, utilizing latest technology for The quality assurance process ensures that the demands of high materials & processes. level of confidence of the products manufactured entirely to the The facility includes epoxy resin cast CT & VT pouring plant customer’s need & satisfaction. under vacuum process & ovens up to 200 degree C. The test laboratory has equipments such as: Use of reputed make of non-aging CRGO silicon steel & enameled copper wire is made to ensure high quality & long life of the products. The core windings made from them are cast under vacuum conditions along with epoxy resin mix in a special preparation & impregnation plant. For ease of installation, electroplated mounting plate is provided at the bottom. The transparent cover facilitates visual check as well as protects the secondary terminals. The cover can be sealed thus making it tamperproof. The product range includes various ratings that meet all requirements. The entire range of instrument transformer has been fully type tested as per latest Indian & • Microprocessor based automated test bench for class of accuracy, phase angle & ratio error measurements • Partial Discharge (P.D.) measurements • Power frequency High Voltage testing equipment up to 100kV for primary side & 5kV for secondary side • Overvoltage inter-turn test kit • Polarity tester • High frequency generator • Core testing kit • Digital micro-ohm meter All the testing equipments are calibrated in NABL approved laboratory periodically. • There is a continuous effort at Stelmec to keep abreast of latest technology inline with customers’ requirement. • All these activities are followed as per ISO 9001 : 2008. Contact: SBU: Stelmec Limited, Panels & Instrument Transformer Division, Virar-Vajreshwari Road, Usgaon, P.O. Bhatana, Vasai (E), Dist. Thane-401303. Tel: +91 91 250 6456432 / 33 / 34 CORPORATE: Stelmec Limited 'Sea Queen', 43-A, H.K. Bhabha Road, Bandstand, Bandra (W), Mumbai - 400 050. Tel: +91 22 2643 6127 / 28 / 29 | Fax: +91 22 2643 6139 | E-mail: corporate@stelmec.com website: www.stelmec.com