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Medium Voltage Fuses and Fuse Links Medium Voltage — BS2692-1 Fuses Bussmann ® General Guide to the Selection of HV Fuse Links, used in oilfield switchgear. For use in the Primary Circuit of Three Phase 50 Hz Transformers Transformer Primary Voltage Transformer 11kV kVA 3.3kV 6.6kV ESI 12-8 Ref. Fuse Rating 13.8kV 200 3.6kV OEFMA 63 12kV OEFMA 31.5 01 12kV OEFMA 25 15.5kV OEFMA 16 250 3.6kV OEFMA 80 12kV OEFMA 40 — 12kV OEFMA 25 15.5kV OEFMA 20 300/315 3.6kV OEFMA 100 12kV OEFMA 50 02 12kV OEFMA31.5 15.5kV OEFMA 25 400 3.6kV OEFMA 125 12kV OEFMA 63 — 12kV OEFMA 40 15.5kV OEFMA 31.5 500 3.6kV OEFMA 160 12kV OHFMA 71 03 12kV OEFMA 50 15.5kV OEFMA 40 630 3.6kV OEFMA 200 7.2kV OEFMA 100 — 12kV OEFMA 63 15.5kV OEFMA 50 750/800 3.6kV OLGMA 250 7.2kV OHGMA 125 04 12kV OHFMA 80 15.5kV OEFMA 63 1000 3.6kV OLGMA 250* 7.2kV OHGMA 140 05 12kV OHGMA 90** 15.5kV OHGMA 71 1250 — 7.2kV OHGMA 160* — 12kV OHGMA 100 15.5kV OHGMA 90 1600 — — — 12kV OLGMA 125* 15.5kV OLGMA 100* This selection table has been based upon the following criteria: 1. Withstand against magnetizing inrush current taken as 12 times full-load current for 0.1 second. 2. Withstand against 150% permissible overload current. Recommendations marked with asterisks have the following significance:- *Limited to permissible overloads of 130%. **Permits use of a 12kV OHFMA 80A fuse with a 100kVA transformer where permissible overload does not exceed 130%. 3. For 6.6kV systems, 12kV fuse links are recommended where possible in the interests of standardization. 4. Wherever possible, 10 inch long FO1 fuse links are offered rather than equivalent 14 inch FO2 types. 5. The above recommendations are not generally applicable to transformers feeding motor circuits with starting currents in excess of the transformer full load current. In this event, please consult Bussmann. Code References in Table Letter Reference Explanation 1st Type O = Oiltight 2nd Diameter E, H, L = 63.5 mm 3rd Length F = 254 mm, G = 359 mm 4th Striker M = As specified in BS 2692 table 11. 5th Tags A = none, i.e. plain caps Table of Preferred Ratings Code Dimensional Current Ratings Breaking Rated kV Reference Ref. BS 2692 (amps) Capacity (kA) 3.6 OEFMA FO1 6.3, 10, 16, 20, 25, 31.5, 40, 50, 63, 50 80, 100, 125, 160, 200 3.6 OEGMA FO2 100, 125, 160, 200 50 3.6 OLGMA FO2 250 50 7.2 OEFMA FO1 80, 100, 112 45 7.2 OHGMA FO2 125, 140, 160 45 12.0 OEFMA FO1 6.3, 10, 16, 20, 25, 31.5, 40, 50, 63 40 12.0 OHFMA FO1 71, 80 40 12.0 OHGMA FO2 6.3, 10, 16, 20, 25, 31.5, 40, 50, 63, 71, 80, 90, 100 40 12.0 OLGMA FO2 125 40 15.5 OEFMA FO1 6.3, 10, 16, 20, 25, 31.5, 40, 50, 63 40 15.5 OHGMA FO2 71, 80, 90 40 15.5 OLGMA FO2 100 40 17.5 OHGMA FO2 6.3, 10, 16, 20, 25, 31.5, 40, 50, 63, 80 35 24.0 OEGMA FO2 6.3, 10, 16, 20, 25, 31.5, 40, 50 25 Contact Bussmann for complete specifications on Medium Voltage Fuses 172 For complete specification data, call Bussmann Information Fax ~ 636.527.1450
Medium Voltage Fuses and Fuse Links Medium Voltage Fuse Links Bussmann ® EEI-NEMA Type K and T Fuse Links These fuse links afford effective overcurrent protection to systems and equipment. In addition to apparatus protection, they can be coordinated with other overcurrent protective devices for sectionalizing in order to isolate feeder branches. Catalog Data-EEI-NEMA and High-Surge Universal Tin Element Fuse Links for Cutouts. Rated to 27kV Carton Data Type H EEI-Nema EEI-Nema Link (High Type K Type T Weight Qty. Amps Surge) (Fast) (Slow) Lbs. Kg's. Non-Removable Button-Head For Standard Open Or Enclosed Cutouts _______________________________________________ 1 FL11H1 FL11K1 FL11T1 _______________________________________________ 2 FL11H2 FL11K2 FL11T2 25 2 0.91 _______________________________________________ 3 FL11H3 FL11K3 FL11T3 ___________________________________________________________________ 5 FL11H5 FL11K5 FL11T5 __ _______________________________________________ 6 — FL11K6 FL11T6 _______________________________________________ 8 FL11H8 FL11K8 FL11T8 _______________________________________________ 10 — FL11K10 FL11T10 _______________________________________________ 12 — FL11K12 FL11T12 25 2 0.91 _______________________________________________ 15 — FL11K15 FL11T15 _______________________________________________ 20 — FL11K20 FL11T20 ___________________________________________________________________ 25 — FL11K25 FL11T25 __ _______________________________________________ 30 — FL11K30 FL11T30 _______________________________________________ 40 — FL11K40 FL11T40 25 4 1.82 ___________________________________________________________________ 50 — FL11K50 FL11T50 __ _______________________________________________ 65 — FL11K65 FL11T65 _______________ 5 2.27 _______________________________________________ 80 — FL11K80 FL11T80 15 _______________ 5.5 2.49 ___________________________________________________________________ 100 — FL11K100 FL11T100 6 2.72__ _______________________________________________ 140 — FL11K140 FL11T140 10 _______________ 7 3.17 ___________________________________________________________________ 200 — FL11K200 FL11T200 10 4.53__ High-Surge Type H Fuse Links High-surge, Type H fuse links are manufactured in ratings of 1, 2, 3, 5, and 8A. They have been developed principally for primary fusing of small-sized transformers. Type H links are manufactured in the universal buttonhead design. Type N Fuse Links Type N fuse links conform to previous NEMA standards and have been superseded by Type K and T links. Type N fuse links are manufactured in the universal button design in ratings of 5 through 200A for use in NEMA standard dimensioned cutouts rated through 27 kv. Catalog Data-EEI-NEMA and High-Surge Universal Tin Element Fuse Links for Cutouts. Rated to 27kV Carton Data Type H EEI-Nema EEI-Nema Link (High Type K Type T Weight Qty. Amps Surge) (Fast) (Slow) Lbs. Kg's. Removable Button-Head For Cutouts Requiring Removable-Button Links* _______________________________________________ 1 — FL3K1 FL3T1 _______________________________________________ 2 — FL3K2 FL3T2 _______________________________________________ 3 — FL3K3 FL3T3 _______________________________________________ 5 — FL3K5 FL3T5 _______________________________________________ 6 — FL3K6 FL3T6 _______________________________________________ 8 — FL3K8 FL3T8 25 1.81 0.82 _______________________________________________ 10 — FL3K10 FL3T10 _______________________________________________ 12 — FL3K12 FL3T12 _______________________________________________ 15 — FL3K15 FL3T15 _______________________________________________ 20 — FL3K20 FL3T20 ___________________________________________________________________ 25 — FL3K25 FL3T25 __ _______________________________________________ 30 — FL3K30 FL3T30 _______________________________________________ 40 — FL3K40 FL3T40 25 3.44 1.56 ___________________________________________________________________ 50 — FL3K50 FL3T50 __ _______________________________________________ 65 — FL3K65 FL3T65 _______________________________________________ 80 — FL3K80 FL3T80 15 3.63 1.65 ___________________________________________________________________ 100 — FL3K100 FL3T100 __ _______________________________________________ 140 — FL3K140 FL3T140 10 7.63 3.46 ___________________________________________________________________ 200 — FL3K200 FL3T200 __ *Adapter-type removable-button links with ferrule adapter to convert to double-leader links are available in K and T types. Order by description. Catalog Data—EEI-NEMA Type K Universal Silver-Element Fuse Links for Cutouts Rated through 27kV Carton Data Link Rating EEI-Nema Weight Qty. Amps Type K Lbs. Kg's. Non-Removable Button-Head For Standard Open Or Enclosed Cutouts ____________________________ 8 FL12K8 ____________________________ 10 FL12K10 ____________________________ 12 FL12K12 25 2 0.91 ____________________________ 15 FL12K15 ___________________________________________________________________ 25 FL12K25 __ ___________________________________________________________________ 50 FL12K50 25 3 1.34 __ For complete specification data, call Bussmann Information Fax ~ 636.527.1450 173
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Bussmann® Circuit Protection Solut
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Bussmann ® i Section Guide Page 1
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General Data — Selection Chart Bu
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General Data - Dimensions (Millimet
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Electrical - Power Fuses CUBEFUSE a
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Electrical - Power Fuses Bussmann
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Electrical - Power Fuses Low-Peak
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Electrical - Power Fuses Fusetron
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Electrical - Power Fuses T-Tron ®
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Electrical - Power Fuses Plug Fuses
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Electronic - PC Board and Small Dim
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⁄Ω¢∑ Diameter ≈ 1∑ Length
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Fuseblocks, Holders and Terminal Bl
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Fuseblocks, Holders and and Disconn
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Overview for Fusible Disconnect Swi
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Handles & Shafts For 30A Fusible Di
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Accessories For 60A - 100A Fusible
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Accessories Bussmann ® For 200A -
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Overview Bussmann ® For Non-Fusibl
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Handles & Shafts Bussmann ® For 16
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400A - 800A Non-Fusible Disconnect
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Enclosed Fusible Disconnect Switche
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Other Configurations Bussmann ® fo
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Enclosed Non-Fusible Disconnect Swi
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Enclosed Non-Fusible Disconnect Swi
Page 125 and 126: Disconnect Switches Bussmann ® Fus
Page 127 and 128: High Speed Fuses North American Sty
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Page 151 and 152: High Speed Fuses Fuse Bases (Blocks
Page 153 and 154: High Speed Fuses British Standard B
Page 155 and 156: High Speed Fuses Bussmann ® Ferrul
Page 161 and 162: Medium Voltage Fuses and Fuse Links
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Page 179 and 180: Telpower ® DC Power Protection Sys
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Page 194 and 195: British, European, & Canadian Stand
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Page 222 and 223: Fuse Diagnostic Chart Bussmann ® 2
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Time-Current & Current Limitation C
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Glossary of Terms Bussmann ® Ohm
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Index by Part Number Bussmann ® Ca
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CUBEFuse The World’s First “Fin
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