OVERALL LENGTH (B) " ( mm) " ( mm) " ( mm) " ( mm)

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1 threaded hole 1 2" deep (both ends) Dimensional Information NOMINAL CURRENT CAT. NO. 40 HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS Note: Other hardware is available consult the factory. OVERALL DIAMETER (A) " ( mm) " ( mm) " ( mm) " ( mm) B C OVERALL LENGTH (B) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) BODY LENGTH (C) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) A WEIGHT 2.25 lb. 1.02kg 2.5 lb. 1.13kg 3.25 lb. 1.45kg 2.75 lb. 1.25kg 3.75 lb. 1.70kg 4.75 lb. 2.15kg 3.75 lb. 1.70kg 4.75 lb. 2.15kg 12.0 lb. 5.44kg 13.5 lb. 6.12kg H-59

2 Electrical Characteristics (Single Fuses) NOMINAL CURRENT CAT. NO. RATED PEAK ARC (4) I/C MELT I 2 T TOTAL I 2 T (2) (3) 40 HTSS ,140 10, HTSS ,500 14, HTSS ,700 18, HTSS ,300 31, HTSS ,800 66, HTSS , , HTSS , , HTSS ,020 39, , HTSS ,120 54, , HTSS ,260 6, HTSS ,680 12, HTSS ,440 17, HTSS ,700 22, HTSS ,300 36, HTSS ,800 76, (1) HTSS ,800 66, (1) HTSS , , (1) HTSS , , HTSS , HTSS ,580 9, HTSS ,200 20, HTSS ,700 17, HTSS ,300 28, HTSS ,800 70, HTSS ,600 12, HTSS ,600 23, HTSS ,500 36, HTSS ,300 68, HTSS ,200 43, ,000 Notes: (1) These fuses have only been tested at a rated maximum interrupting current of 44,000A RMS symmetrical. All other fuses have a rated maximum interrupting current of 50,000A RMS symmetrical. (2) Tabulated maximum total I 2 t values are at the nominal voltage of the fuse. Values for kv fuses at 15.5kV are reduced by approximately 12%, while values for kv and 23kV fuses at 10kV and 25.5kV are increased by approximately 30% and13% respectively. (3) Maximum total I 2 t values are reduced for currents below 50,000A. For example, at 10,000A, maximum total I 2 t values are approximately 15% less than the published values. (4) Peak arc voltages quoted are for 50,000A currents at the rated maximum voltage listed. Reduced voltages and currents will reduce the peak arc voltage. Consult the factory for information. H-60

3 Electrical Characteristics (Fuses Tested for Use in Parallel) NOMINAL CURRENT (2) CAT. NO. (ORDER TWO S) RATED PEAK ARC (5) L/C MELT I 2 T TOTAL I 2 T (3) (4) 130 HTSS ,800 65, HTSS , , HTSS , , HTSS ,900 92, , HTSS , , , HTSS , , , HTSS ,800 92, HTSS , , HTSS , , (1) HTSS ,130 59, , (1) HTSS , , , HTSS , , , HTSS ,800 68, HTSS , , HTSS , ,000 Notes: (1) These fuses have only been tested at a rated maximum interrupting current of 44,000A RMS symmetrical due to test station limitations. All other fuses have a rated maximum interrupting current of 50,000A RMS symmetrical. (2) Current ratings shown above are achieved by using a parallel combination of two fuses (order two fuses). To facilitate equal sharing of the interrupting duty, the two fuses should be resistance matched (±2%) and be mounted such that current paths to and from each fuses are symmetrical. (3) Tabulated maximum total I 2 t values are at the nominal voltage of the fuse. Values for kv fuses at 15.5kV are reduced by approximately 12%, while values for 23kV fuses at 25.5kV are increased by approximately 13%. (4) Maximum total I 2 t values are reduced for currents below 50,000A. For example, at 10,000A, maximum total I 2 t values are approximately 15% less than the published values. (5) Peak arc voltages quoted are for 50,000A currents at the rated maximum voltage listed. Reduced voltages and currents will reduce the peak arc voltage. Consult the factory for information. H-61

4 Trans-Guard Fuse Selection For a detailed explanation on selecting the appropriate backup current limiting fuse for a given application, please refer to Hi-Tech Fuses Application Bulletin FS-10. For a quicker method of selecting the proper Trans-Guard for applications involving coordination with Bay-O-Net expulsion fuses and transformers having impedances equal to or higher than those listed below, refer to the fuse coordination chart below and on pages H-63 H-65. These charts include columns that specify s for each application. More comprehensive charts listing fusing alternatives for transformers having any impedance can be found at /utility. Assumed Transformer Impedances Used for Fuses Coordination TRANSFORMER SIZE () 1 IMPEDANCES (%) 3 IMPEDANCES (%) and up H-62

5 Single-Phase Transformer Coordination for Expulsion & Trans-Guard s TRANS-GUARD OS SHORTY kv 15.5/kV 23kV TRANSFORMER PHASE-TO-GROUND LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY Dual Sensing Bay-O-Net ( ) a,c and Coordinations 5 C03 40 C03 40 C03 40 C03 30 C03 30 C03 30 C C05 40 C05 40 C03 40 C03 30 C03 30 C03 30 C C08 65 C05 40 C03 40 C03 30 C03 30 C03 30 C C C08 65 C05 40 C03 30 C03 30 C03 30 C C C C08 50 C05 30 C05 30 C03 30 C C C C08 65 C05 30 C05 30 C05 30 C C14 300* C C C08 65 C08 50 C08 50 C C14 330* C C C08 80 C08 65 C08 65 C C14 300* C C C C C C18 330* C C C C C C18 330* C C C C C C18 330* C C C C12 130* Current Sensing Bay-O-Net ( ) a,b and Coordinations 5 C04 40 C04 40 C04 40 C04 30 C04 30 C04 30 C C06 40 C04 40 C04 40 C04 30 C04 30 C04 30 C C08 40 C06 40 C04 40 C04 30 C04 30 C04 30 C C10 80 C08 40 C06 40 C04 30 C04 30 C04 30 C C C08 65 C06 40 C06 30 C06 30 C04 30 C C C C08 40 C06 30 C06 30 C06 30 C C C C10 80 C08 40 C08 40 C06 30 C C C C C08 50 C08 40 C08 40 C C17 300* C C C10 80 C10 80 C10 65 C C C C C C10 65 C C17 300* C C C C C C17 300* C C C C Dual Element Bay-O-Net ( ) a,c and Coordinations 5 C03 40 C03 40 C03 40 C03 30 C03 30 C03 30 C C05 40 C04 40 C03 40 C03 30 C03 30 C03 30 C C07 50 C05 40 C03 40 C03 30 C03 30 C03 30 C C C06 40 C04 40 C03 30 C03 30 C03 30 C C C09 80 C06 40 C05 30 C04 30 C03 30 C C C C07 50 C06 40 C05 30 C04 30 C C C C07 50 C06 40 C06 40 C C C C09 80 C07 65 C07 50 C C C C09 80 C07 65 C C C C C C C Notes: Bay-O-Net fuse selection is based on Cooper Power Systems recommendations. Bay-O-Net fuses are selected to meet inrush criteria of 12 times transformer full load current for.1 second. Backup OS Shorty fuses are selected to melt only on internal transformer faults, where transformer impedance is equal to or greater than the value given in chart on page H-62. If the impedance is higher, a smaller fuse can often be used. * Indicate parallel fuse applications. a. Or equivalent Bay-O-Net link. b. Current Sensing Bay-O-Net fuses are selected to melt with three to four times transformer full load current at 300 seconds. c. Dual Sensing and Dual Element Bay-O-Net fuses are selected to limit transformer load to approximately 160% for seven hours and 200% for two hours with the transformer initially carrying 75% of load at an ambient temperature of 35 C. H-63

6 Trans-Guard 3-Phase Transformer Coordination for Expulsion and Trans-Guard s TRANS-GUARD OS SHORTY (kv) kv 15.5/kV 23kV TRANSFORMER (kv) PHASE-TO-PHASE d 24.9 d d 34.5 d LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY Dual Sensing Bay-O-Net ( ) a,c and Coordinations 45 C C08 65 C05 40 C03 30 C03 30 C03 30 C03 30 C03 30 C03 30 C C C C08 65 C05 30 C05 30 C03 30 C03 30 C03 30 C03 30 C C14 300* C C08 80 C08 50 C08 50 C05 30 C05 30 C05 30 C05 30 C C14 300* C C C08 65 C08 65 C05 30 C05 30 C05 30 C05 30 C C18 400* C14 300* C C C10 80 C08 50 C08 50 C08 65 C08 65 C C18 400* C14 300* C C C C08 50 C08 50 C08 65 C08 65 C C18 400* C C C C10 80 C10 80 C10 80 C10 80 C C18 400* C18 330* C C C C C12 e 130* C10 80 C C18 330* C C C C C12 e 130* C12 130* C C18 d 300* C18 d 300* C C C14 e 200* C14 200* C12 130* 2000 C C14 200* C14 200* Current Sensing Bay-O-Net ( ) a,b and Coordinations 45 C C08 40 C06 40 C04 30 C04 30 C04 30 C04 30 C04 30 C04 30 C C C C06 40 C06 30 C06 30 C04 30 C04 30 C04 30 C04 30 C C C C08 65 C06 40 C06 30 C06 30 C04 30 C04 30 C04 30 C C C C C08 40 C08 40 C06 30 C06 30 C06 30 C06 30 C C C C C10 65 C10 65 C08 40 C08 30 C08 30 C06 30 C C17 300* C C C10 80 C10 65 C08 40 C08 30 C08 30 C08 30 C C17 300* C C C C10 65 C10 65 C10 65 C10 65 C C17 300* C C C C12 80 C12 80 C12 80 C10 65 C C17 300* C C C C C C12 80 C C16 250* C16 250* C C C14 e 160* C14 160* C C17 e 300* C16 250* C16 250* C16 e 200* C14 160* C14 160* 2500 C17 e 300* C16 250* Dual Element Bay-O-Net ( ) a,c and Coordinations 45 C C07 65 C04 40 C03 30 C03 30 C03 30 C03 30 C03 30 C03 30 C C C C06 40 C04 30 C04 30 C03 30 C03 30 C03 30 C03 30 C C C07 65 C06 40 C06 40 C05 30 C04 30 C04 30 C03 30 C C C C07 50 C07 50 C06 40 C05 30 C05 30 C04 30 C C C09 65 C09 65 C07 50 C06 30 C06 40 C06 40 C C C09 80 C09 80 C09 65 C07 50 C07 50 C07 50 C C C C11 80 C09 65 C C C C Notes: Bay-O-Net fuse selection is based on Cooper Power Systems recommendations. Bay-O-Net fuses are selected to meet inrush criteria of 12 times transformer full load current for.1 second. Backup OS Shorty fuses are selected to melt only on internal transformer faults, where transformer impedance is equal to, or greater than, the value given on page H-62. If the impedance is higher, a smaller fuse can often be used. * Indicates parallel fuse applications. a Or equivalent bayonet link. b Current Sensing Bay-O-Net fuses are selected to melt with three to four times transformer full load current at 300 seconds. c Dual Sensing and Dual Element Bay-O-Net fuses are selected to limit transformer load to approximately 160% for seven hours and 200% for two hours with the transformer initially carrying 75% of load at ambient temperature of 35 C. d Applications are limited to gnd Y-gnd Y connected transformers with no more than 50% delta connected secondary load. Phase-to-ground rated fuses are frequently recommended for gnd Y-gnd Y connected transformers. e Bay-O-Net assembly may be subjected to damage during fault clearing at currents above the Bay-O-Net s Maximum I/C. H-64

7 Single-Phase Transformer Coordination for Cooper High Ampere Overload Bay-O-Net ( _CB) & Trans-Guard s Fuse Voltage TRANS-GUARD OS SHORTY (kv) kv 15.5/kV TRANSFORMER (kv) PHASE-TO-GROUND LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY 75 C C C04 300* C C05 300* C C05 300* C C05 300* C C C C05 300* C C Phase Transformer Coordination for Cooper High Ampere Overload Bay-O-Net ( _CB) & Trans-Guard s Fuse Voltage kv TRANS-GUARD OS SHORTY (kv) 15.5/kV TRANSFORMER (kv) PHASE-TO-PHASE a 24.9 a LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY C C C C04 300* C C05 300* C C C05 300* C C C C C C05 300* C C C C C05 250* C05 250* C C C05 b 300* C05 b 300* C C Notes: Bay-O-Net fuse selection is based on Cooper Power Systems recommendations. Bay-O-Net fuses are selected to meet inrush criteria of 12 times transformer full load current for 0.1 second. Backup OS Shorty fuses are selected to melt only on internal transformer faults, where transformer impedance is equal to, or greater than, the value given on page H-62. If the impedance is higher, a smaller fuse can often be used. * Indicates parallel fuse applications. High Ampere Overload Bay-O-Net fuses are selected to limit transformer load to approximately 160% for seven hours and 200% for two hours with the transformer initially carrying 75% of load at ambient temperature of 35 C. a Applications are limited to gnd Y-gnd Y connected transformers with no more than 50% delta connected secondary load. Phase-to-ground rated fuses are frequently recommended for gnd Y-gnd Y connected transformers. b Bay-O-Net assembly may be subjected to damage during fault clearing at currents above the Bay-O-Net s maximum I/C. ABB 34.5kV Protective Links (345B995G ) & 38kV Trans-Guard s ASSUMED TRANSFORMER L-L IMPEDANCE Z% LINK SHORTY LINK SHORTY LINK SHORTY A 65 3A A A A A A Note: Backup fuses are selected to melt only on internal transformer faults, where transformer impedance is equal to, or greater than, the value given. For transformers having lower impedances, consult the factory. H-65