technical specification for 11& 33 kv post insulators, 11 ... - WBSEDCL
technical specification for 11& 33 kv post insulators, 11 ... - WBSEDCL
technical specification for 11& 33 kv post insulators, 11 ... - WBSEDCL
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WEST BENGAL STATE ELECTRICITY DIST. COM. LTD.Office of the Chief Engineer , Procurement & Contracts DepartmentVidyut Bhavan( 4th Floor),Bidhannagar, Block-DJ : Sector-IIKolkata-700 091 : Phone No.0<strong>33</strong>-2359-8397 : Fax No.0<strong>33</strong>-2359-192<strong>11</strong>4.3 <strong>11</strong> KV DISC. INSULATOR :Sl.No.DescriptionRating<strong>11</strong> KV(BALL &SOCKETTYPE – 70 KN)<strong>11</strong> KV(BALL & SOCEKTTYPE –45 KN)1 Nominal system voltage : <strong>11</strong> KV <strong>11</strong> KV2 Highest system voltage : 12 KV 12 KV3 Total Creepage distance : 320 mm 320 mm4 Spacing : 145mm 145mm5 Minimum Failing Load : 70KN 45 KN6 P.F. visible discharge voltage : 9KV rms 9KV rms7 P.F. Minimum flash over voltagea) Dry : 75 KV rms 75 KV rmsb) Wet : 45 KV rms 45 KV rms8 Impulse flashover voaltage1.2/50 micro second wave :a) Positive : <strong>11</strong>5 KVp <strong>11</strong>5 KVpb) Negative : 120 KVp 120 KVp9 P.F. withstand voltagea) Dry : 60 KV rms 60 KV rmsb) Wet : 35 KV rms 35 KV rms10 Impulse withstand voltage 1.2/50 :micro second wave :a) Positive : 75 KVp 75 KVpb) Negative : 80 KVp 80 KVp<strong>11</strong> P.F. puncture withstand voltage : 1.3 times theactual dryflashover voltageof the unit1.3 times theactual dryflashover voltageof the unit12 Nominal Dia of Ball, Ball pin, Socket & : As per IS As per ISSecurity Cap13 Porcelain Diameter : 255 mm 255 mm14 Net Weight (approx) : 4.6 Kg 4.5 KgRemarks : Manufacturers Name and Logo should be engraved upon the product.Insulator – Spec – Amended in March’2012
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