Technical Data 6002
Effective September 2018
Supersedes December 2017
BUSSMANN
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 fuse’s
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.
The fuse limits the magnitude of
electromechanical stresses in the protected
apparatus.
These fuses are in a self-contained, non-
venting package for installation indoors or
outdoors in an enclosure.
Available in indicating and non-indicating
versions.
Open fuse indicator speeds troubleshooting
by providing a positive visual indication of
fuse operation.
•
•
•
Description:
•
•
Bussmann
®
series Indicating and non-
indicating E-Rated, current-limiting, medium
voltage fuses for potential, small power and
control transformers.
•
Contents
Description
Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.475kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.6kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
5.5kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 10-26
7.2kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 27-29
8.3kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 30-39
12kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 40-42
15.5kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . 43-52
17.5kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . 53-54
24kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 55-56
25.5kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . 57-60
36kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 61-62
38kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 63-69
Fuse mountings . . . . . . . . . . . . . . . . . . . . . . 70-71
•
•
Typical applications
•
Primary protection of:
•
Medium voltage potential transformers
•
Small medium voltage service
transformers
Small medium voltage control
transformers.
•
PT medium voltage fuses for potential and
small power transformers
2.475kV maximum system voltage
Amp rating
0.25
0.5
1
2
5
Dimensions - in (mm)
Length A
Diameter B
Clip centers C
Catalog No. (Interrupting rating - kA)
Indicating
Non-indicating
—
2NCLPT-.25E (63)
—
2NCLPT-.5E (63)
—
2NCLPT-1E (40)
—
2NCLPT-2E (40)
—
2NCLPT-5E (25)
Technical Data 6002
Effective September 2018
Recommended fuseclip
4.5 (114)
0.8 (20)
3.9 (99)
1A1837
Dimensions (see catalog number tables for values)
C
B
A
Recommended fuseclip and fuse block:
Description
Open fuseclip for 0.8 (20mm) dia. fuses
Single-pole open fuse block with #10-32 phil-slot screw
terminals rated 2500V, 5A maximum and 63kA withstand
rating
Cat. No.
1A1837
PTFB-2500-JCD
Eaton.com/bussmannseries
3
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