BUSSMANN Effective September 2020 Technical Data 6002 Supersedes September 2018 SERIES PT Medium voltage fuses for potential and small power transformers Features and benefits Low amp, current-limiting E-Rated PT medium voltage fuses are general purpose fuses defined by their melting time-current characteristic that permit their electrical interchangeability with other fuses of the same E Rating. E-Rated general purpose fuses must have a current responsive element that will melt in 300 seconds at an RMS current within the range of 200% to 240% of the fuses nameplate current rating, fuse refill, or link per ANSI C37.46 for fuses rated 100E or less. PT fuses are physically dimensioned for easy installation in existing hardware. Space saving size eases design considerations for new installations. Current-limiting fuses provide positive interruption even on low fault currents. Description: The fuse limits the magnitude of TM Bussmann series indicating and non- electromechanical stresses in the protected indicating E-Rated, current-limiting, medium apparatus. voltage fuses for potential, small power and These fuses are in a self-contained, non- control transformers. venting package for installation indoors or outdoors in an enclosure. Contents Available in indicating and non-indicating versions. Description Page Open fuse indicator speeds troubleshooting Introduction ............................. 2 by providing a positive visual indication of 2.475 kV fuses ......................... 3-6 fuse operation. 3.6 kV fuses ........................... 7-9 Typical applications 5.5 kV fuses ......................... 10-26 Primary protection of: 7.2 kV fuses .......................... 27-29 Medium voltage potential transformers 8.3 kV fuses ......................... 30-39 12 kV fuses .......................... 40-42 Small medium voltage service transformers 15.5 kV fuses ........................ 43-52 Small medium voltage control 17.5 kV fuses ......................... 53-54 transformers. 24 kV fuses .......................... 55-56 25.5 kV fuses ........................ 57-60 36 kV fuses .......................... 61-62 38 kV fuses .......................... 63-69 Fuse mountings ...................... 70-71PT medium voltage fuses for potential and Technical Data 6002 small power transformers Effective September 2020 E-Rated PT medium voltage fuses Catalog symbols (by maximum voltage rating): 25.5 kV 25CLPT- E 2.475 kV 2NCLPT- 36 kV 3.6 kV 36ABGNA 3.6ABCNA 36CAV 3.6ABWNA 38 kV 3.6CAV 38CAV E 5.5 kV 38CAVH E JCW- 38CLPT- E 5CLPT- E Ratings*: 5NCLPT- E Volts 5NCLPT- E-A 2.4 kV to 38 kV 5.5ABWNA E 5.5AMWNA E Amps 0.25 to 15 A 5.5CAV E 5.5CAVH E Interrupting ratings 25 to 80 kA RMS Sym 7.2 kV 7.2ABWNA * See catalog number tables for voltages, ampacities and interrupting ratings by catalog number. 7.2ABCNA Agency information: 7.2AMWNA E Those PT fuses conforming to the requirements for E-Rating 7.2CAV meet the performance characteristics of IEEE/ANSI C37.46 8.3 kV 8CLPT- E-A 8CLPT- E-B 8NCLPT- E 8NCLPT- E-A 8NCLPT- E-B 12kV 12ABCNA 12CAV 15.5 kV 15CLPT- E 15NCLPT- E-A 15.5CAV E 15.5CAVH E 17.5 kV 17.5ABGNA 17.5CAV 24 kV 24ABGNA 24CAV Eaton.com/bussmannseries 2