Bussmann® Low-Peak® Yellow Time Lag Fuses LPT Class T – 600 Volts, 35-60 Amps Dimensional Data 1.56" (0.06mm) 0.81" 35–60A (0.03mm) CATALOG SYMBOL: LPT 35 TO 60 AMPERES 600 VOLTS AC (OR LESS)* CURRENT LIMITING INTERRUPTING RATING - 200,000A RMS SYM. U.L. LISTED CLASS T (GUIDE # JDDZ, FILE # E4273) CSA HRCI-T (CLASS 1422-02, FILE # 53787) 1.00" (0.04mm) LPT Low-Peak® Yellow Time Lag Fuse • A superior all-purpose space saving branch circuit fuse that meets most protection requirements up to 60 amps. • Very compact, physical size is only .81” x 1.56” (20.6mm x 39.7mm) with 1.0” Class T rejection feature. • Time lag to avoid unwanted fuse openings from surge currents when sized appropriately per NEC®. • For protection of motor circuits up to 15 horsepower at 460V, or 20 horsepower at 575V. * Self certified for 300V DC, 10kA interrupting rating. • Fast response under short-circuit conditions for a high degree of current limitation. Catalog Symbols and Ampere Ratings • Maximum interrupting rating of 200,000 amperes for use in today’s large capacity systems. LPT-35 LPT-40 LPT-45 LPT-50 LPT-60 Standard T Fuseblocks (600V) Catalog Data (reference BIF Document: 1116) Carton Quantity and Weight-LPT Time Lag (600V AC) Amps Poles Screw No. Box Lug Ampere Ratings 35 1 T60060-1SR T60060-1CR Kg. to 2 T60060-2SR T60060-2CR 0.371 60 3 T60060-3SR T60060-3CR 35-60 Carton Qty 10 Weight** Lbs. 0.82 **Weight per carton. 12-21-98 SB98107 Rev. A Form No. LPT Page 1 of 2 BIF Document:1031 Bussmann® Low-Peak® Yellow Time Lag Fuses LPT Class T – 600 Volts, 35-60 Amps Time-Current Characteristic Curves–Average Melt AMPERE RATING 60 1,000 35 B 400,000 AMPERE RATING 100,000 100 60 10,000 35 TIME IN SECONDS 10 1,000 200,000 100,000 100 100 10,000 A 1,000 INSTANTANEOUS PEAK LET-THRU CURRENT IN AMPS Current Limitation Curves 1 .1 60,000 10,000 1000 .01 10 Motor Application Per NEC 430-52: LPT fuses may be sized at a maximum of 300% of motor F.L.A. (or next standard fuse size, if 300% does not correspond to a standard fuse size). For longer acceleration times, fuse sizing can be increased but shall not exceed 400%. 100 RMS SYMMETRICAL CURRENTS IN AMPERES A–B=ASYMMETRICAL AVAILABLE PEAK (2.3 X SYMM RMS AMPS) CURRENT IN AMPERES The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this BIF document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications. 12-21-98 SB98107 Rev. A Form No. LPT Page 2 of 2 BIF Document: 1031