British BS 88 Introduction British BS 88 Contents Fuse Volts Amp Range Page 0-900 188-190 90-791-19 Accessories Indicator System & Fuse Bases 195 British BS 88 Fuse Ranges Amps Vac Vdc -900 0 150-710 90 500 General Information Designed and tested to: BS 88: Part IEC 9: Part UL Recognized Cooper Bussmann offers the industry s widest range of British style semiconductor fuses and accessories. Cooper Bussmann British style products use innovative arc quenching techniques and high grade materials to provide: Minimal energy let-through (I t) Excellent DC performance Good surge withstand profile British style fuses are typically found in equipment manufactured in the United Kingdom or British Commonwealth countries. However, North American manufacturers have begun to specify British style fuses particularly in UPS applications at 0V or less to take advantage of their size, performance and cost benefits. Voltage Rating All Cooper Bussmann British style fuses are tested to IEC 9: Part. This standard requires a test voltage which is 5% higher than the rated voltage. In North America, fuses are required to clear only their rated voltage. Accessories Trip-indicator fuses are available for use in parallel with the main fuse. Indicator fuses can be attached to the associated fuselink, or mounted separately in panel-mounted fuseclips. In addition, a push-on adapter and microswitch attachment are available, to provide remote indication. Fuse blocks are also available for most applications. 187
British BS 88 0V: -900A LCT, LET, LMT, LMMT Specifications Description: BS 88 style stud-mount fuses. Dimensions: See dimensions illustrations. Ratings: Volts: 0Vac/150Vdc Amps: -900A IR: 00kA RMS Sym. Agency Information: CE, Designed and tested to: BS 88 Part, IEC 9 Part, UL Recognized. All fuses above have been tested at 318Vac. Consult Cooper Bussmann for specific UL Recognition status. Electrical Characteristics 1. Total Clearing I t K 1. The total clearing I t at rated 1. voltage and at power factor 1.0 of 15% are given in the electrical characteristics. For 0.8 other voltages, the clearing 0. 1) I t is found by multiplying by 0. correction factor, K, given as 0. a function of applied working ) E g voltage, E g, (rms). 50 100 150 00 50 Dimensions (mm) Fig. 1: LCT 5.5. 8.7 8 38 8. 7 1mm = 0.039 / 1 = 5.mm Fig. 3: LMT 13.5 5. Fig. : LET 9.7 1.7 31 10.3 59 7.1. 1.8 5 8 1) LCT ) LET, LMT, LMMT 17.7 19.1 Fig. : LMMT 13.5 5. 31 59 8 10.3 Arc Voltage 750 This curve gives the peak arc voltage, U L, which may appear across the 500 fuse during its operation as a function of the applied working voltage, 50 E g, (rms) at a power factor of 15%. Power Losses 100 00 300 1) LCT Watts loss at rated current ) LET, LMT, LMMT is given in the electrical 1.0 Kp characteristics. The curve 0.8 allows the calculation of the power losses at load currents lower than the rated current. The correction factor, K p, is given as a function of the RMS load 0. 0.5 0. 0.3 0. current, I b, in % of the rated current. 0.1 I b Catalog Numbers Electrical Characteristics 30 0 50 0 70 80 90 100% Rated I t (A Sec) Catalog Current Clearing Clearing Watts Numbers Type RMS-Amps Pre-arc at 10V at 0V Loss LCT 9 1.0 10LCT.8 1.5 1LCT LCT 1 7 3.5 1LCT 1 0 50 100.5 0LCT 0 5 80 10.0 5LET 5 18 0.0 3LET 3 3 00 50 5.0 35LET 35 50 30 00 5.0 50LET 50 100 500 100 7.0 3LET LET 3 180 1100 00 9.0 80LET 80 300 1900 3800 10.0 100LET 100 00 3800 7500 10.0 15LET 15 00 3800 7500 1.0 10LET 100 7000 1000 0.0 180LETa 180 100 1000 9000 1.0 10LMT 100 7000 1000 17.0 00LMT 00 1500 10000 0000 8.0 50LMT 50 300 0000 0000 8.0 315LMT LMT 315 000 35000 75000 35.0 355LMT 355 8000 50000 100000 35.0 00LMT 00 1000 70000 10000 0.0 50LMT 50 18000 100000 0000.0 00LMMT 00 000 35000 80000 0.0 500LMMT 500 1000 80000 170000.0 30LMMT 30 000 150000 300000 75.0 710LMMT LMMT 7000 00000 0000 77.0 800LMMT 800 5000 300000 00000 8.0 900LMMT 900 75000 00000 800000 97.0 Watts loss provided at rated current. Note: 7LET, 10LET, 1LET and 1LET are available for replacement purposes on existing equipment. See accessories on page 195. U L 1) ) E g Data Sheet: 7000 188 38.1 1 Indicator (Optional) 38 83 Features and Benefits Excellent cycling capability Excellent DC performance Low arc voltage and low energy let-through (I t) Typical Applications DC common bus AC and DC drives Power converters/rectifiers Reduced voltage starters
British BS 88 0V: -900A LCT -0A: 0V LET 5-180A: 0V 10 10 10 LCT 10LCT 1LCT 1LCT 0LCT 10 5LET 3LET 35LET 50LET 3LET 80LET 100LET 15LET 10LET 180LETa 10 10 10 8 8 10 8 10 8 10 8 Data Sheet: 357859 Data Sheet: 3578593 10 900LMMT 800LMMT 710LMMT 30LMMT 50LMT 00 & 500LMMT 355LMT 315LMT 50LMT 180LET 00LMT 10LET & LMT 15 & 100LET 80LET 10 SYMMETRICAL FAULT FULLY ASYMMETRICAL FAULT 10 0LCT 1LCT 1LCT 10LCT LCT 3LET 50LET 35LET 3LET 5LET 10 189
British BS 88 0V: -900A LMT 10-50A: 0V 10 10 10 10 10LMT 00LMT 50LMT 315LMT 355LMT 00LMT 50LMT 10 8 8 10 LMMT 00-900A: 0V 10 10 10 10 10 8 8 10 00LMMT 500LMMT 30LMMT 710LMMT 800LMMT 900LMMT Data Sheet: 357859 Data Sheet: 3578595 10 900LMMT 800LMMT 710LMMT 30LMMT 50LMT 00 & 500LMMT 355LMT 315LMT 50LMT 180LET 00LMT 10LET & LMT 15 & 100LET 80LET 10 SYMMETRICAL FAULT FULLY ASYMMETRICAL FAULT 10 0LCT 1LCT 1LCT 10LCT LCT 3LET 50LET 35LET 3LET 5LET 10 190
British BS 88 90V: -710A CT, ET, FE, EET, FEE, FM, FMM, MT, MMT Specifications Description: BS 88 style stud-mount fuses. Dimensions: See dimensions illustrations. Ratings: Volts: 90Vac/500Vdc Amps: -710A IR: 00kA RMS Sym. Agency Information: CE, Designed and tested to: BS 88 Part, IEC 9 Part, UL Recognized. MT and MMT 350Vdc (IEC) rating. Consult Cooper Bussmann for UL Recognition status. Electrical Characteristics Total Clearing I t The total clearing I t at rated voltage and at power factor of 15% are given in the electrical characteristics. For other voltages, the clearing I t is found by multiplying by correction factor, K, given as a function of applied working voltage, E g, (rms). 1. 1. 1. 1.0 0.8 0. 0. 0. K 1) ) 00 300 00 500 00 90 1) CT, ET, EET, FE, FEE, MT, MMT ) FM, FMM E g Arc Voltage This curve gives the peak arc voltage, U L, which may appear across the fuse during its operation as a function of the applied working voltage, E g, (rms) at a power factor of 15%. Power Losses Watts loss at rated current is given in the electrical characteristics. The curve allows the calculation of the power losses at load currents lower than the rated current. The correction factor, K p, is given as a function of the RMS load current, Ib, in % of the rated current. Features and Benefits Excellent cycling capability Excellent DC performance Low arc voltage and low energy let-through (I t) Low watts loss Typical Applications DC common bus DC drives Power converters/rectifiers Reduced voltage starters 1500 1000 500 1.0 0.8 0. 0.5 0. 0.3 0. Kp U L E g 00 00 00 0 1) CT ) ET, FE, EET, FEE, FM, FMM I 0.1 b 30 0 50 0 70 80 90 100% 1) ) Dimensions (mm) Fig. 1: CT 5.5 Fig. : ET, FE 7.1 Fig. 3: EET, FEE Fig. : FM, MT Fig. 5: FMM, MMT 8.7 5. 5. 5.8.3 7. 8 3.5 77 70 9 50 A 113 50 A 113 8.7. 8.7 9.7 1.7 17.1 19.1 11.9 31.8 37 19 13.5 10.3 1 1 10.3 83 1mm = 0.039 / 1 = 5.mm Data Sheet: 700 38.1 38 Figs. & 5 A Dimensions Type A FM 80-85mm FMM 80-85mm MT 85mm MMT 85mm 191
British BS 88 90V: -710A Catalog Numbers Electrical Characteristics Rated I t (A Sec) Catalog Current Clearing Clearing Watts Numbers Type RMS-Amps Pre-arc at 15V at 0V Loss CT 1.8 8.5 1 10CT 10 7 30 8 3 1CT CT 1 5 3 1CT 1 1 110 7 0CT 0 3 150 0 7 5ET 5 5 150 50 7 3ET 3 3 190 350 11 35ET 35 5 300 11 0ET 0 103 00 900 9 ET 5ET 5 103 80 1100 11 5ET 5 135 950 1500 1 3ET 3 171 100 000 1 80ET 80 30 500 000 18 35FE 35 33 130 00 9 0FE 0 5 180 300 9 5FE 5 7 70 50 11 50FE 50 103 380 00 11 3FE FE 3 135 80 750 1 71FE 71 0 950 17 80FE 80 50 900 1500 0 90FE 90 30 1300 100 0 100FE 100 70 1800 800 3 90EET 90 90 3000 500 19 110EET 10 000 500 7 EET 10EET 050 7000 1000 35 10EET 500 10000 17000 39 100FEE 100 00 100 00 10FEE 0 1900 3100 3 10FEE 10 850 500 3800 3 FEE 10FEE 000 3700 5700 180FEE 180 100 5300 800 00FEE 00 1900 7100 1100 5 180FM 180 100 7500 13500 0 00FM 00 00 10500 18500 0 5FM 5 3700 1500 500 50FM FM 50 500 0500 37500 8 80FM 80 7000 30500 55000 8 315FM 315 10000 0000 77000 55 350FM 350 15000 0000 105000 55 00FMM 00 10000 0000 7500 85 50FMM 50 15000 0000 105000 90 500FMM 500 0000 8000 150000 100 FMM 550FMM 550 30000 10000 15000 100 30FMM 30 5000 180000 310000 100 700FMM 700 0000 5000 0000 10 10MT 0 15000 5000 180MT 180 3800 5000 38000 00MT 00 000 0000 58000 7 50MT MT 50 11500 80000 110000 3 80MT 80 1500 100000 150000 35 315MT 315 19000 15000 180000 355MT 355 000 10000 00000 51 180MMT 180 150 1000 18000 00MMT 00 00 1000 3000 5MMT 5 3700 000 0000 80MMT 80 00 7000 70000 7 315MMT 315 800 000 91000 51 355MMT 355 13500 97000 10000 5 MMT 00MMT 00 1000 150000 0000 0 50MMT 50 30000 0000 30000 57 500MMT 500 000 300000 50000 50MMT 50 0000 30000 0000 30MMT 30 8500 500000 70000 8 710MMT 710 78000 00000 850000 105 Watts loss provided at rated current. Note: FC, 8ET, 1ET, 15ET, 0ET, 5EET and 75EET are available for replacement purposes on existing equipment. See accessories on page 195. CT -0, ET 5-80A: 90V 10 10 10 10 10 10 CT 10CT 1CT 1CT 0CT 5ET 3ET 35ET 0ET 5ET 5ET 3ET 80ET 8 8 10 8 710MMT 30MMT 50MMT 500MMT 50MMT 315MT 355MT 00MMT 80MT 355MMT 50MT 315MMT 80MMT 00MT 180MT 5MMT 10MT 00MMT 180MMT 0CT 1CT 1CT 10CT CT 80ET 3ET 5ET 5ET 0ET 35ET 3ET 5ET 10 10 10EET 10EET 110EET 90EET Data Sheet: 3578531 19
British BS 88 90V: -710A EET 90-10A, MT 10-355A: 90V MMT 180-710A: 90V 10 10 10 10 90EET 110EET 10EET 10EET 8 10 8 8 10 Data Sheet: 35785313 10MT 180MT 00MT 50MT 80MT 315MT 355MT 10 10 10 10 180MMT 00MMT 5MMT 80MMT 315MMT 355MMT 10 8 8 10 Data Sheet: 35785311 00MMT 50MMT 500MMT 50MMT 30MMT 710MMT 710MMT 30MMT 50MMT 500MMT 50MMT 315MT 355MT 00MMT 80MT 355MMT 50MT 315MMT 80MMT 00MT 180MT 5MMT 10MT 00MMT 180MMT 10 10 0CT 1CT 1CT 10CT CT 80ET 3ET 5ET 5ET 0ET 35ET 3ET 5ET 10EET 10EET 110EET 90EET 10 10 193
British BS 88 90V: -710A FE 35-100A & FM 180-350A: 90V FEE 100-00A & FMM 00-700A: 90V 10 10 10 35FE 0FE 5FE 50FE 3FE 71FE 80FE 90FE 100FE 10 8 10 8 8 10 180FM 00FM 0FM 50FM 80FM 315FM 350FM 10 10 100FEE 10FEE 10FEE 10FEE 180FEE 00FEE 10 00FMM 50FMM 500FMM 550FMM 30FMM 700FMM 10 10 8 8 10 8 700FMM 30FMM 550FMM 500FMM 10 350FM 315FM 80FM 50FM 5FM 00FM 180FM 50FMM 00FMM 10 100FE 90FE 80FE 71FE 3FE 50FE 5FE 0FE 35FE 10 10 10 8 8 00FEE 180FEE 10FEE 10FEE 10FEE 100FEE Data Sheet: 3578531 Data Sheet: 357859 10 10 19
British BS 88 Fuse Accessories Indicator System Trip-Indicators Trip-indicators are available for use in parallel with the main fuse. They can either be attached to the associated fuse or mounted separately in panel mounted fuse clips, reference CL1. A push-on adapter and microswitch attachment is available for use with the trip indicator to give the facility of remote indication, reference MAI. Fuse ratings of 0A and below cannot usually accommodate a trip-indicator. When a trip-indicator is to be attached to the main fuse an accessory pack comprising a pair of mounting clips and an appropriate trip indicator would be required. The clips are snapped onto the fuse end caps and the indicator is pressed into clips as shown. Electrical Specifications Type TI500 TI700 Maximum RMS Voltage 500 700 Maximum Peak Voltage 700 1000 Maximum DC Voltage 130 350 Cold Resistance (ohms) 0.3 0.5 Maximum permissible steady-state current 1.5A 1.5A Interrupting Capacity (RMS Symm.) 100,000 100,000 Pre-Arcing I t 3 3 Fuse Indicator Kits RMS For use Kit. Ref. Details Volts with Fuse Ref. EC-50 Fuse Mount 50 LET MC50 Indicator Kits 50 LMT & LMMT EC-00 (Includes one 0 FE, FEE & ET MC00 indicator 0 FM & FMM MC700 and two clips) 700 MT & MMT CL1 Panel Mount Clips CL1 Panel mount fuse clips are available for mounting a trip-indicator when mounting directly on the fuse is impractical. Order part number CL1. Trip-Indicator Dimensions - mm C 1 B E0.8 A Ref. Dim. A (mm) RMS Volts TI50 37. 50 TI500 7.5 500 TI00 55.7 00 TI700 1.8 700 TI1100 98. 1100 TI1500 10. 1500 TI000 17.5 000 TI500 198.3 500 CL1 Panel Mount Clip Dimensions - mm 1 50.8 Trip Indicator D.8 F.0 8.7 B.35 Microswitch Adapter MAI We offer a microswitch, complete with adapter for securing the indicator. The microswitch is provided with double pole, single throw contacts, having both a normally open and a normally closed position. A special material has been employed in the construction of the adapter to provide reliable operation in the range of temperatures associated with standard operating conditions and during fuse operation. Microswitch and Adapter Type MAI Terminal Arrangement Dimensions in mm NO NC NC NO Current Rating: AC 50/0Hz resistive load @ 50V RMS AC 50/0Hz resistive load @ 17V RMS DC, resistive load @ 110Vdc DC, resistive load @ 30Vdc Maximum Working Voltage: Contact-to-contact (RMS) Contact-to-contact (RMS) Maximum DC Volts: A A 0.7A DC A DC 1000V 1500V 110V DC 195