BRITISH STYLE– SEMICONDUCTOR PROTECTION FUSES The Edison British Style semiconductor protection fuses include a 660VAC line utilizing new filler technology. These new fuses have greatly reduced peak let-through current and energy under fault conditions and hence extend fuse protection capability. They can be recognized by the letter “F” in their catalog number. Application and technical data for these 660VAC “F” fuses and the original line of 240VAC British “T” type fuses are presented on the following pages. “F” Range This is a superior design of fuses in the same physical package as the “T” range. Equivalent Ratings This table shows the suggested equivalent ratings to replace a “T” with an “F”. Because of the new design technology it has been possible to obtain the equivalent energy let-through I2t with a higher amp rated fuse hence reducing the possibility of premature operation. This table gives a range of suggested acceptable new “F” type to replace the earlier “T” type. To upgrade your protection to the new “F” series select a fuse rating within the range shown that suits your circuit inrush requirements. You will still have the same or better protection of your semiconductor devices. It should be remembered that to protect devices we must consider the energy let-through of the selected fuse. The label amp rating will relate to the full load current and the circuit inrush amps. The suggested replacements are based on: a. Similar surge withstand to normal circuit overloads. b. Lower total I2t let-through. This gives enhanced reliability due to the use of a higher current rated fuse which avoids nuisance operation and still gives improved short-circuit protection. 84 Replacement Table — “T” to “F” (660V) Earlier “T” Range 6CT 10CT 12CT 16CT 20CT 25ET 32ET 35ET 40ET 45ET 56ET 63ET – – 80ET 65EET 75EET 90EET 110EET – 140EET – 160EET – 160MT 180MT 200MT – 250MT 280MT 315MT 355MT 180MMT 200MMT 225MMT 280MMT 315MMT 355MMT – – 400MMT 450MMT 500MMT 560MMT 630MMT 710MMT New “F” Range Lowest Rating 6FC 10FC 12FC 16FC 20FC – 35FE 35FE 40FE 45FE 63FE 63FE – – 80FE – – – – – 140FEE – 160FEE – 200FM 225FM 250FM 280FM 315FM 350FM 350FM 350MT 180FM 200FM 225FM 280FM 315FM 350FM – – 500FMM 550FMM 630FMM 700FMM 700FMM 700FMM Highest Rating 6FC 10FC 12FC 16FC 20FC – 35FE 40FE 45FE 50FE 63FE 71FE 80FE 90FE 100FE – – 100FEE 120FEE 140FEE 160FEE 180FEE 200FEE 180FM 200FM 225FM 250FM 280FM 315FM 350FM 350FM 350FM 180FM 200FM 225FM 280FM 315FM 350FM 400FMM 450FMM 500FMM 550FMM 630FMM 700FMM 700FMM 700FMM BRITISH STYLE– SEMICONDUCTOR PROTECTION FUSES 660 VOLT (AC) RANGE Pre-arc I2t (A2SEC) Clearing At 415V 6FC 10FC 12FC 16FC 20FC 1.5 6 9 13 30 6 18 26 44 100 8 30 45 65 160 3 3 3 6 6 660 20 20 20 20 20 ET 25ET 32ET 25 32 150 190 250 350 7 11 450 10 10 0.420 0.420 FE 35FE 40FE 45FE 50FE 63FE 71FE 80FE 90FE 100FE 33 52 76 103 135 210 250 360 470 130 180 270 380 480 600 900 1300 1800 200 300 450 600 750 950 1500 2100 2800 9 9 11 11 12 17 20 20 23 450 10 10 10 10 10 10 10 10 10 0.420 0.420 0.420 0.420 0.420 0.420 0.420 0.420 0.420 65EET 75EET 90EET 210 420 490 2000 2600 3000 3000 4400 4500 20 20 19 450 5 5 5 0.450 0.450 0.450 100FEE 120FEE 140FEE 160FEE 180FEE 200FEE 400 540 850 1000 1400 1900 1600 1900 2500 3700 5300 7100 2400 3100 3800 5700 8400 11400 24 32 36 46 46 52 5 5 5 5 5 5 0.450 0.450 0.450 0.450 0.450 0.450 180FM 200FM 225FM 250FM 280FM 315FM 350FM 1400 2600 3700 5200 7000 10000 15000 7500 10500 14500 20500 30500 40000 60000 13500 18500 26500 37500 55000 77000 105000 40 40 44 48 48 55 55 1 1 1 0.240 0.240 0.240 1 1 1 0.240 0.240 0.240 400FMM 450FMM 500FMM 550FMM 630FMM 700FMM 10000 15000 20000 30000 45000 60000 40000 60000 82000 120000 180000 245000 72500 105000 15000 215000 310000 420000 85 90 100 100 100 120 1 1 1 1 1 1 0.450 0.450 0.450 0.450 0.450 0.450 Type Outline FC 2.53" 64.3mm 2.50" 63.5mm EET FEE 2.76" 70.0mm FM 3.15"-3.35" 80-85mm FMM Part Number Clearing At 660V Watts Loss Carton Weight (Kg) D.C. Volts Carton Qty. 0.160 0.160 0.160 0.160 0.160 450 450 450 3.15"-3.35" 80-85mm • Interrupting rating 200kA RMS Symmetrical. • Watts loss provided at rated current. • These fuses meet the requirements of BS 88 Part 4 and IEC 269-4 • Consult Edison for UL Recognition information 85 BRITISH STYLE– SEMICONDUCTOR PROTECTION FUSES 240 VOLT (AC) RANGE Type Outline LCT 1.50" 38.0mm LET 1.65" 41.8mm LMT 2.32" 59.0mm LMMT 2.32" 59.0mm • Interrupting rating 200kA RMS Symmetrical. • Watts loss provided at rated current. • All fuses above have been tested to 318VAC. • These fuses meet the requirements of BS 88 Part 4 and IEC 269-4 • UL Recognition on LET and LMT. Others pending – Consult Edison. 86 Pre-arc I2t (A2SEC) Clearing At 120V 6LCT 10LCT 12LCT 16LCT 20LCT 2 3.8 7 20 25 6 12 22 50 80 9 22 32 100 160 1.0 2.5 2.5 2.5 4.0 7LET 10LET 12LET 16LET 25LET 32LET 35LET 50LET 63LET 80LET 100LET 125LET 160LET 180LET 1.7 3.8 7 15 18 32 50 100 180 300 600 600 1100 1600 10 23 42 70 120 200 320 500 1100 1900 3800 3800 7000 12000 17 35 58 140 250 450 600 1400 2200 3800 7500 7500 18000 29000 1.5 1.8 2 2.5 4.0 5.0 5.0 7.0 9.0 10.0 10.0 10.0 20.0 21.0 160LMT 200LMT 250LMT 315LMT 355LMT 400LMT 450LMT 1100 1500 3200 6000 8000 14000 18000 7000 10000 20000 35000 50000 70000 100000 16000 20000 40000 75000 100000 160000 220000 17.0 28.0 28.0 35.0 35.0 40.0 42.0 400LMMT 400LMMT 400LMMT 400LMMT 400LMMT 400LMMT 6000 14000 24000 32000 52000 75000 35000 80000 150000 200000 300000 400000 80000 170000 300000 460000 600000 800000 60.0 64.0 75.0 77.0 82.0 97.0 Part Number Clearing At 240V Watts Loss D.C. Volts Carton Qty. Carton Weight (Kg) 200 20 20 20 20 20 0.110 0.110 0.110 0.110 0.110 10 10 10 10 10 10 10 10 10 10 10 10 10 10 0.310 0.310 0.310 0.310 0.310 0.310 0.310 0.310 0.310 0.310 0.310 0.310 0.310 0.310 1 1 1 1 1 1 1 0.180 0.180 0.180 0.180 0.180 0.180 0.180 1 1 1 1 1 1 0.370 0.370 0.370 0.370 0.370 0.370 140 160 160 BRITISH STYLE– SEMICONDUCTOR PROTECTION FUSES DIMENSIONS in Millimeters Type FC LCT FE & ET LET FEE & EET FM LMT FMM LMMT A 74.6 47 77 56 94 113 84 113 84 B 64.3 38 63.5 41.8 70 80-85 59 80-85 59 FC & LCT FM & LMT C 54.8 28 48 26.2 46 50 31 50 31 D 8.7 8.4 17.7 17.7 37 38 38.1 83 83 FE, ET & LET E 8.7 8.7 19.1 19.1 19 41.5 41 38 38 F 6.4 6.4 12.7 12.7 31.8 25.4 25.4 25.4 25.4 G 4 4 7.1 7.1 8.7 10.3 10.3 10.3 10.3 H 5.5 5.5 9.7 9.7 11.9 14 13.5 14 13.5 FEE & EET FMM & LMMT 87 400 450 500 550 630 700 100 120 140 160 180 200 BRITISH STYLE– SEMICONDUCTOR PROTECTION FUSES AMPERE RATING 30 660V Time-Current Curves 10 TIME IN SECONDS FEE (100-200A) FMM (400-700A) 1 .1 .01 180 200 225 250 280 315 350 35 40 45 50 63 80 71 100 90 6 CURRENT IN AMPERES 10 12 16 20 10,000 1000 100 .004 AMPERE RATING 30 10 660V Time-Current Curves FC (6-20A) FE (35-100A) FM (180-350A) 1 .1 01 CURRENT IN AMPERES 88 60000 1000 100 10 04 450 315 355 400 230 160 200 BRITISH STYLE– SEMICONDUCTOR PROTECTION FUSES AMPERE RATING 240V Time-Current Curves 30 LMT (160-450A) TIME IN SECONDS 10 1 .1 .01 CURRENT IN AMPERES 400 500 630 710 800 900 5 10 12 15 20 25 32 35 50 63 80 100 125 160 180 4000 1000 200 .004 AMPERE RATING 30 .1 .01 10,000 1000 .004 100 LCT (6-20A) LET (25-180A) LMMT (400-900A) 1 10 240V Time-Current Curves TIME IN SECONDS 10 CURRENT IN AMPERES 89 BRITISH STYLE– INDICATORS AND 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 20A 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 Maximum RMS Voltage Maximum Peak Voltage Maximum DC Voltage Cold Resistance (ohms) Maximum permissible steady-state current Interrupting Capacity (RMS Symm.) Pre-Arcing I2t (A2S) Total I2t (max volts) (A2S) B 21 C 6 TI500 500 700 130 0.3 1.5A 100,000 23 46 TI700 700 1000 350 0.45 1.5A 100,000 23 46 A 0.8 E D F 6.8 Dimensions in mm Trip-Indicator Data Fuse Indicator Kits Kit. Ref. EC-250 MC250 EC-600 MC600 MC700 Details Fuse Mount Indicator Kits (Inc. one indicator and two clips) RMS Volts 250 250 660 660 700 For use with Fuse Ref. LET LMT & LMMT FE, FEE, ET, & EET FM & FMM MT & MMT Ref. TI250 TI500 TI600 TI700 TI1100 TI1500 TI2000 TI2500 Microswitch Adapter MAI NO NC Edison is offering 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. NC NO Terminal Arrangement Microswitch and Adapter Type MAI Current Rating: AC 50/60Hz resistive load @ 250V RMS AC 50/60Hz resistive load @ 127V RMS DC, resistive load @ 110V DC DC, resistive load @ 30V DC Maximum Working Voltage: Contact-to-contact (RMS) Contact-to-contact (RMS) Maximum DC Volts: 4A 6A 0.7A DC 2A DC 1000V 1500V 110V DC Dimensions in mm 90 Dim. “A” (mm) 37.6 47.5 55.7 61.8 98.4 120.6 147.5 198.3 RMS Volts 250 500 600 700 1100 1500 2000 2500 6.35