Technical Data 6002
Effective September 2020
Supersedes September 2018
BUSSMANN
SERIES
PT Medium voltage fuses for potential and
small power transformers
Features and benefits
Description:
BussmannTM series indicating and nonindicating E-Rated, current-limiting, medium
voltage fuses for potential, small power and
control transformers.
Contents
•
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, nonventing 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 Page
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.475 kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.6 kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
5.5 kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 10-26
7.2 kV fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . 27-29
8.3 kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 30-39
12 kV fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . 40-42
15.5 kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . 43-52
17.5 kV fuses. . . . . . . . . . . . . . . . . . . . . . . . . . 53-54
24 kV fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . 55-56
25.5 kV fuses . . . . . . . . . . . . . . . . . . . . . . . . . 57-60
36 kV fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . 61-62
38 kV 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
Technical Data 6002
Effective September 2020
E-Rated PT medium voltage fuses
Catalog symbols (by maximum voltage rating):
•
•
•
•
•
•
2.475 kV
• 2NCLPT-_
3.6 kV
• 3.6ABCNA_
•
3.6ABWNA_
•
3.6CAV_
•
•
25.5 kV
• 25CLPT-_E
•
36 kV
•
36ABGNA_
• 36CAV_
•
38 kV
• 38CAV_E
5.5 kV
• JCW-_
•
5CLPT-_E
•
5NCLPT-_E
•
5NCLPT-_E-A
•
5.5ABWNA_E
•
5.5AMWNA_E
•
5.5CAV_E
•
5.5CAVH_E
7.2 kV
• 7.2ABWNA_
•
38CAVH_E
•
38CLPT-_E
Ratings*:
•
Volts
• 2.4 kV to 38 kV
•
Amps
• 0.25 to 15 A
•
Interrupting ratings
•
25 to 80 kA RMS Sym
•
7.2ABCNA_
* See catalog number tables for voltages, ampacities and interrupting ratings
by catalog number.
•
7.2AMWNA_E
Agency information:
•
7.2CAV_
•
Those PT fuses conforming to the requirements for E-Rating
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
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
2.475 kV maximum system voltage
Amp rating
0.25
0.5
1
2
5
Length A
4.5 (114)
Dimensions - in (mm)
Diameter B
Clip centers C
0.8 (20)
3.9 (99)
Catalog No. (Interrupting rating - kA)
Indicating
Non-indicating
—
2NCLPT-.25E (63)
—
2NCLPT-.5E (63)
—
2NCLPT-1E (40)
—
2NCLPT-2E (40)
—
2NCLPT-5E (25)
Recommended fuseclip
1A1837
Dimensions (see catalog number tables for values)
C
B
A
Recommended fuseclip and fuse block:
Description
Cat. No.
Open fuseclip for 0.8 (20mm) dia. fuses
1A1837
Single-pole open fuse block with #10-32 phil-slot screw
terminals rated 2500V, 5A maximum and 63kA withstand
rating
PTFB-2500-JCD
Eaton.com/bussmannseries
3
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
2.47 kV time-current curves — minimum melting for 2NCLPT-_E
0.25E
0.5E
1E
2E
5E
2NCLPT-_E
Curve TC56357202
December 2008
Eaton.com/bussmannseries
4
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
2.47 kV time-current curves — total clearing for 2NCLPT-_E
0.25E
0.5E
1E
2E
5E
2NCLPT-_E
Curve TC59883702
October 2010
Eaton.com/bussmannseries
5
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
2.47 kV peak let-through curves for 2NCLPT-_E
5E
1E & 2E
0.5E
0.25E
2NCLPT-_E
Curve TC63933702
December 2008
Eaton.com/bussmannseries
6
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
3.6 kV maximum system voltage
Amp rating
2
3.15
3.15
6.3
6.3
10
Length A
8.7 (221)
5.6 (142)
7.7 (195)
5.6 (142)
Dimensions - in (mm)
Diameter B
Clip centers C
1.6 (41)
7.6 (193)
1 (25)
4.4 (112)
1 (25)
6.5 (165)
1 (25)
4.4 (112)
7.7 (195)
1 (25)
6.5 (165)
Catalog No. (Interrupting
Indicating
—
—
—
—
—
—
rating - kA)
Non-indicating
Recommended fuseclip
3.6CAV2 (50)
1A1837
3.6ABWNA3.15 (50)
3.6ABCNA3.15 (50)
3.6ABWNA6.3 (50) A3354705
3.6ABCNA6.3 (50)
3.6ABCNA10 (50)
Dimensions (see catalog number tables for values)
C
B
A
Recommended fuseclips:
Description
Cat. No.
Open fuseclip for 1.0 (25.4mm) dia. fuses
A3354705
Open fuseclip for 1.56 (39.7mm) / 1.6 (40.6mm) dia. fuses
1A0835
Eaton.com/bussmannseries
7
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
3.6 kV Time-current curves — minimum melting for 3.6CAV_, 3.6ABC_ and 3.6ABW_
2A (CAV)
3.15A (ABC/ABW)
6.3A (ABC/ABW)
10A (ABC/ABW)
3.6ABC_, 3.6ABW_, 3.6CAV_
Eaton.com/bussmannseries
8
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
3.6 kV Peak let-through curves for 3.6ABC_ and 3.6ABW_
Eaton.com/bussmannseries
9
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5.5 kV maximum system voltage
Dimensions - in (mm)
Diameter B
Clip centers C
0.8 (20)
4.8 (122)
1 (25)
4.4 (112)
1.6 (41)
6.2 (157)
1.6 (41)
8.1 (206)
1 (25)
4.4 (112)
0.8 (20)
4.8 (122)
1.6 (41)
6.2 (157)
1.6 (41)
8.1 (206)
1.6 (41)
8.1 (206)
1 (25)
4.4 (112)
0.8 (20)
4.8 (122)
1.6 (41)
6.2 (157)
1.6 (41)
8.1 (206)
1 (25)
4.4 (112)
0.8 (20)
4.8 (122)
Amp rating
0.5
0.5
0.5
0.5
1
1
1
1
1.5
2
2
2
2
3
3
Length A
5.6 (142)
5.6 (142)
7.4 (188)
9.5 (241)
5.6 (142)
5.6 (142)
7.4 (188)
9.5 (241)
9.5 (241)
5.6 (142)
5.6 (142)
7.4 (188)
9.5 (241)
5.6 (142)
5.6 (142)
3
9.5 (241)
1.6 (41)
8.1 (206)
3
4
5
5
5
5
10
15
7.4 (188)
5.6 (142)
9.5 (241)
5.6 (142)
5.6 (142)
7.3 (185)
9.5 (241)
7.4 (188)
1.6 (41)
0.8 (20)
1.6 (41)
1 (25)
0.8 (20)
1.6 (41)
1.6 (41)
1.6 (41)
6.2 (157)
4.8 (122)
8.1 (206)
4.4 (112)
4.8 (122)
5.9 (150)
8.1 (206)
6.2 (157)
Catalog No. (Interrupting rating - kA)
Indicating
Non-indicating
—
5.5AMWNA.5E (63)
—
5.5ABWNA0.5E (50)
5.5CAVH0.5E (50)
JCW-1/2E (40)
5CLPT-.5 (80)†
5NCLPT-.5E-A (63)
—
5.5ABWNA1E (50)
—
5.5AMWNA1E (63)
5.5CAVH1E (50)
JCW-1E (40)
5CLPT-1 (80)†
5NCLPT-1E-A (63)
5CLPT-1.5 (80)†
—
—
5.5ABWNA2E (50)
—
5.5AMWNA2E (63)
5.5CAVH2E (50)
JCW-2E (40)
—
5NCLPT-2E (63)
—
5.5ABWNA3E (50)
—
5.5AMWNA3E (63)
Recommended fuseclip
1A1837
A3354705
1A0835
A3354705
1A1837
1A0835
1A0835
A3354705
1A1837
1A0835
1A1837
A3354705
1A1837
5CLPT-3E (80)
5NCLPT-3E (63)
1A0835
—
5CLPT-5E (80)
—
—
—
5CLPT-10E (80)
—
JCW-3E (40)
5.5AMWNA4E (63)
5NCLPT-5E-A (63)
5.5ABWNA5E (50)
5.5AMWNA5E (63)
JCW-5E (40)
5NCLPT-10E-A (63)
5.5CAV15E (50)
1A0835
1A1837
1A0835
A3354705
1A1837
1A0835
1A0835
† Due to manufacturing variances, this fuse does not comply with ANSI C37.46 for “E” rating. See time-current curves for performance characteristics.
CLPT Type mountings and hardware 5.5 kV maximum (4.8kV nominal)*
Fuse mounting
Amp rating
type**
CLPT and NCLPT-A Mounting
Non-disconnect
0.5–10
Disconnect†
BIL
(kV)
60
60
Catalog number
Mounting (including live parts, end fittings)***
Live parts (including
Porcelain insulator
Glass-polyester insulator
end fittings)***
End fittings
(disconnect only)
5CLPT-PNM-A
5CLPT-PDM-A
—
CLPT-DF
5CLPT-GNM-A
5CLPT-GDM-A
CLPT-NL
CLPT-DL
* Refers to 5CLPT and 5NCLPT fuses only.
** See page 70 for dimensions and diagrams of typical mounting.
*** End fittings supplied only when required.
† Disconnect mountings provide a means for fuse extraction only. Do not use a disconnect mounting for load switching or fuse removal while energized.
Eaton.com/bussmannseries
10
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
Dimensions (see catalog number tables for values)
C
B
Recommended fuseclips:
Indicator
Description
Cat. No.
Open fuseclip for 0.8 (20 mm) dia. fuses
1A1837
Open fuseclip for 1.0 (25.4 mm) dia. fuses
A3354705
Open fuseclip for 1.56 (39.7 mm) / 1.6 (40.6 mm) dia. fuses
1A0835
A
Eaton.com/bussmannseries
11
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5.5 kV time-current curves — minimum melting for 5NCLPT-_-A
0.5E-A
1E-A
2E
3E
5E-A
10E
5NCLPT-_E
Eaton.com/bussmannseries
12
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5.5 kV time-current curves — total clearing for 5NCLPT-_-A
0.5E-A
1E-A
2E
3E
5E-A
10E
5NCLPT-_E
Eaton.com/bussmannseries
13
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5.5 kV peak let-through curves for 5NCLPT-_-A
10E
5E-A
3E
1E-A & 2E
0.5E-A
5NCLPT-_E
Eaton.com/bussmannseries
14
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5.5 kV Time-current curves — total clearing for 5CLPT_
0.5A
1A
1.5A
3E
5E
10E
Fuse melt times in dotted line region
may not be assured due to manufacturing
variations. Dotted line shows nominal
operation. Some individual fuses may
not trip until current at 10-second mark
is applied.
Curves are based on tests starting with
fuse unit at ambient temperature of 25ºC
and without initial load. Curves are plotted
to maximum test points so all variations
should be negative.
5CLPT-_
Curve TC56353306
August 2011
Eaton.com/bussmannseries
15
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5.5 kV peak let-through curves for 5CLPT_
10E
5E
1A & 1.5A
3E
0.5A
5CLPT-_
Curve TC63934001
March 2013
Eaton.com/bussmannseries
16
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
2E (CAVH)
1E (CAVH)
0.5E (CAVH)
5.5 kV time-current curves — minimum melting for 5.5CAV_ and 5.5CAVH_
15E (CAV)
5.5CAV_, 5.5CAVH_
Eaton.com/bussmannseries
17
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5.5 kV time-current curves — total clearing for 5.5CAV_
15E (CAV)
5.5CAV_
Eaton.com/bussmannseries
18
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5.5 kV peak let-through curves for 5.5CAVH_
10
Peak cut-off current in amps
1
2E (CAVH)
1E (CAVH)
0.5E (CAVH)
0.1
0.01
100
5.5CAVH_
1000
10,000
RMS Symmetrical prospective current in amps
Eaton.com/bussmannseries
100,000
19
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5E (ABW)
2E (ABW)
3E (ABW)
1E (ABW)
0.5E (ABW)
5.5 kV time-current curves — minimum melting for 5.5ABW_ and 5.5AMW_
0.5E (AMW)
1E (AMW)
2E (AMW)
3E (AMW)
4E (AMW)
5E (AMW)
5.5ABW_, 5.5AMW_
Eaton.com/bussmannseries
20
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5E (ABW)
2E (ABW)
3E (ABW)
1E (ABW)
0.5E (ABW)
5.5 kV time-current curves — total clearing for 5.5ABW_ and 5.5AMW_
0.5E (AMW)
1E (AMW)
2E (AMW)
3E (AMW)
4E (AMW)
5E (AMW)
5.5ABW_, 5.5AMW_
Eaton.com/bussmannseries
21
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
5.5 kV peak let-through curves for 5.5ABW_ and 5.5AMW_
5E (ABW)
3E (ABW)
2E (ABW)
1E (ABW)
5E (AMW)
4E (AMW)
0.5E (ABW)
3E (AMW)
2E (AMW)
1E (AMW)
0.5E (AMW)
5.5ABW_, 5.5AMW_
Eaton.com/bussmannseries
22
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
7.2 kV maximum system voltage
Amp rating
0.5
1
2
2
3
3.15
3.15
4
4
5
6
6.3
6.3
10
Length A
5.6 (142)
5.6 (142)
5.6 (142)
8.7 (221)
5.6 (142)
5.6 (142)
7.7 (195)
5.6 (142)
8.7 (221)
5.6 (142)
8.7 (221)
5.6 (142)
7.7 (195)
8.7 (221)
Dimensions - in (mm)
Diameter B
Clip centers C
0.8 (20)
4.8 (122)
0.8 (20)
4.8 (122)
0.8 (20)
4.8 (122)
1.6 (41)
7.5 (190)
0.8 (20)
4.8 (122)
1 (25.4)
4.4 (112)
1 (25.4)
6.5 (165)
0.8 (20)
4.8 (122)
1.6 (41)
7.5 (190)
0.8 (20)
4.8 (122)
1.6 (41)
7.5 (190)
1 (25.4)
4.4 (112)
1 (25.4)
6.5 (165)
1.6 (41)
7.5 (190)
Catalog No. (Interrupting rating - kA)
Indicating
Non-indicating
—
7.2AMWNA0.5E (50)
—
7.2AMWNA1.0E (50)
—
7.2AMWNA2.0E (50)
—
7.2CAV2 (40)
—
7.2AMWNA3.0E (50)
—
7.2ABWNA3.15 (45)
—
7.2ABCNA3.15 (45)
—
7.2AMWNA4.0E (50)
—
7.2CAV4 (40)
—
7.2AMWNA5E (50)
—
7.2CAV6 (40)
—
7.2ABWNA6.3 (45)
—
7.2ABCNA6.3 (45)
—
7.2CAV10 (40)
Recommended fuseclip
1A1837
1A0835
1A1837
A3354705
1A1837
1A0835
1A1837
1A0835
A3354705
1A0835
Dimensions (see catalog number tables for values)
C
B
A
Recommended fuseclips
Description
Cat. No.
Open fuseclip for 0.8 (20 mm) dia. fuses
1A1837
Open fuseclip for 1.0 (25.4 mm) dia. fuses
A3354705
Open fuseclip for 1.56 (39.7 mm) / 1.6 (40.6 mm) dia. fuses
1A0835
Eaton.com/bussmannseries
23
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
7.2 kV time-current curves — minimum melting for 7.2ABW_ and 7.2CAV_
2E (CAV)
4E (CAV)
6E (CAV)
10E (CAV)
6.3A (ABW)
3.15A (ABW)
7.2ABW_, 7.2CAV_
Eaton.com/bussmannseries
24
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
7.2 kV peak let-through curves for 7.2ABW_
Eaton.com/bussmannseries
25
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
8.3 kV maximum system voltage
Amp rating
0.5
1
1
2
2
3
4
5
5
8
10
Length A
9.5 (241)
5 (127)
9.5 (241)
8 (203)
9.5 (241)
12.9 (328)
8 (203)
5 (127)
12.9 (328)
5 (127)
12.9 (328)
Dimensions - in (mm)
Diameter B
Clip centers C
1.6 (41)
8.1 (206)
1.1 (28)
4 (102)
1.6 (41)
8.1 (206)
0.8 (20)
7.2 (183)
1.6 (41)
8.1 (206)
1.6 (41)
11.5 (292)
0.8 (20)
7.2 (183)
1.1 (28)
4 (102)
1.6 (41)
11.5 (292)
1.1 (28)
4 (102)
1.6 (41)
11.5 (292)
Catalog No. (interrupting rating - kA)
Indicating
Non-indicating
8CLPT-.5 (50)†
8NCLPT-.5E-A (50)
—
8NCLPT-1E (50)
—
8NCLPT-1E-A (50)
—
8NCLPT-2E (25)
—
8NCLPT-2E-A (50)
8CLPT-3E (50)
8NCLPT-3E-B (50)
—
8NCLPT-4E (25)
—
8NCLPT-5E (50)
8CLPT-5E (50)
8NCLPT-5E-B (50)
—
8NCLPT-8E (50)
8CLPT-10E (50)
8NCLPT-10E-B (50)
Recommended fuseclip
1A0835
A3354705
1A0835
1A1837
1A0835
1A1837
A3354705
1A0835
† Does not comply with ANSI C37.46 for “E” rating.
CLPT type mountings and hardware 8.3 kV maximum (7.2 kV nominal)*
Catalog number
Amp rating
0.5–2
3–10
*
**
***
†
Fuse mounting
type**
BIL
(kV)
Non-disconnect
Disconnect†
Non-disconnect
Disconnect†
75
75
75
75
Mounting (including live parts, end fittings)***
Porcelain insulator
Glass-polyester insulator
Live parts (including End fittings
end fittings)***
(disconnect only)
8CLPT-PNM-A
8CLPT-PDM-A
8CLPT-PNM-B
8CLPT-PDM-B
CLPT-NL
CLPT-DL
CLPT-NL
CLPT-DL
8CLPT-GNM-A
8CLPT-GDM-A
8CLPT-GNM-B
8CLPT-GDM-B
—
CLPT-DF
—
CLPT-DF
Refers to 8CLPT and 8NCLPT-A or -B fuses only.
See page 70 for dimensions and diagrams of typical mounting.
End fittings supplied only when required.
Disconnect mountings provide a means for fuse extraction only. Do not use a disconnect mounting for load switching or fuse removal while energized.
Dimensions (see catalog number tables for values)
C
Indicator
B
A
Recommended fuseclips:
Description
Cat. No.
Open fuseclip for 0.8 (20 mm) dia. fuses
1A1837
Open fuseclip for 1.0 (25.4 mm) dia. fuses
A3354705
Open fuseclip for 1.56 (39.7 mm) / 1.6 (40.6 mm) dia. fuses
1A0835
Eaton.com/bussmannseries
26
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
8.3 kV time-current curves — minimum melting for 8NCLPT_
1E
5E
8E
2E
4E
8NCLPT-_
Curve 59887102
July 2002
Reference # 628852, 598871
Curve TC56357206
December 2008
Eaton.com/bussmannseries
27
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
8.3 kV time-current curves — total clearing for 8NCLPT_
1E
5E
2E
8NCLPT-_
8E
4E
Curve 59887104
July 2002
Reference # 598871
Curve TC59883706
December 2008
Eaton.com/bussmannseries
28
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
8.3 kV peak let-through curves for 8NCLPT_
8E
5E
4E
8NCLPT-_
Curve 63933703
July 2001
Reference # 639337
2E
1E
Curve TC63933704
December 2008
Eaton.com/bussmannseries
29
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
8.3 kV time-current curves — minimum melting for 8CLPT_
0.5A
3E
5E
10E
8CLPT-_
0.5 A fuse melt time in the dotted line region may not be
assured due to manufacturing variations. The dotted lines
show nominal operation. Some individual fuses may not
open until current at 10-second mark is applied.
Curve TC56353206
December 2013
Eaton.com/bussmannseries
30
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
8.3 kV time-current curves — total clearing for 8CLPT_
0.5A
3E
5E
10E
8CLPT-_
Curve TC56353306
March 2013
Eaton.com/bussmannseries
31
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
8.3 kV peak let-through curves for 8CLPT_
10E
5E
3E
0.5A
8CLPT-_
Curve TC63934001
March 2013
Eaton.com/bussmannseries
32
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
8.3 kV time-current curves — minimum melting for 8NCLPT-_E-A/B
0.5E-A
1E-A
2E-A
3E-B
5E-B
10E-B
8NCLPT-_E-A/B
Curve TC70548303
December 2008
Eaton.com/bussmannseries
33
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
8.3 kV time-current curves — total clearing for 8NCLPT-_E--A/B
0.5E-A
1E-A
2E-A
3E-B
5E-B
10E-B
8NCLPT-_E-A/B
Curve TC70548403
December 2008
Eaton.com/bussmannseries
34
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
8.3 kV peak let-through curves for 8NCLPT-_E-A/B
10E-B
5E-B
3E-B
1E-A & 2E-A
0.5E-A
8NCLPT-_E-A/B
Curve TC63934002
December 2008
Eaton.com/bussmannseries
35
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
12 kV maximum system voltage
Amp rating
2
3.15
Length A
8.7 (221)
7.7 (195)
Dimensions - in (mm)
Catalog No. (Interrupting
Diameter B Clip centers C Indicating
1.6 (41)
7.5 (190)
—
1 (25)
6.5 (165)
—
rating - kA)
Non-indicating
12CAV2 (40)
12ABCNA3.15 (45)
Recommended fuseclip
1A0835
A3354705
Dimensions (see catalog number tables for values)
C
B
A
Recommended fuseclips:
Description
Cat. No.
Open fuseclip for 1.0 (25.4 mm) dia. fuses
A3354705
Open fuseclip for 1.56 (39.7 mm) / 1.6 (40.6 mm) dia. fuses
1A0835
Eaton.com/bussmannseries
36
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
12 kV time-current curves — minimum melting for 12ABC_ and 12CAV_
2A (CAV)
3.15A (ABC)
12ABC_, 12CAV_
Eaton.com/bussmannseries
37
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
12 kV peak let-through curves for 12ABC_
Eaton.com/bussmannseries
38
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
15.5 kV maximum system voltage
Amp rating
0.5
1
2
3
3
3
5
5
7
10
Dimensions - in (mm)
Catalog No. (Interrupting rating - kA)
Length A
Diameter B Clip centers C
Indicating
Non-indicating Recommended fuseclip
12.9 (328)
1.6 (41)
11.5 (292)
15.5CAVH0.5E (80)
15NCLPT-.5E-A (50)
12.9 (328)
1.6 (41)
11.5 (292)
15.5CAVH1E (80)
15NCLPT-1E-A (50)
12.9 (328)
1.6 (41)
11.5 (292)
15.5CAVH2E (80)
15NCLPT-2E (50)
12.9 (328)
1.6 (41)
11.5 (292)
—
15.5CAV3E (80)
17.6 (447)
1.6 (41)
16.1 (409)
—
15NCLPT-3E (50)
1A0835
17.6 (447)
1.6 (41)
16.1 (409)
15CLPT-3E (50)
—
12.9 (328)
1.6 (41)
11.5 (292)
—
15.5CAV5E (80)
17.6 (447)
1.6 (41)
16.1 (409)
15CLPT-5E (50)
15NCLPT-5E (50)
12.9 (328)
1.6 (41)
11.5 (292)
—
15.5CAV7E (80)
17.6 (447)
1.6 (41)
16.1 (409)
15CLPT-10E (50)
15NCLPT-10E (50)
CLPT Type mountings and hardware 15.5 kV maximum (14.4 kV nominal)
Amp rating
0.5–2
3–10
*
**
†
Fuse mounting
type*
Nondisconnect
Disconnect†
Nondisconnect
Disconnect†
Catalog number
Mounting (Including live parts, end fittings)**
Porcelain insulator
Glass-polyester insulator
Live parts (including End fittings
end fittings)**
(disconnect only)
95
15CLPT-PNM-A
15CLPT-GNM-A
CLPT-NL
—
95
15CLPT-PDM-A
15CLPT-GDM-A
CLPT-DL
CLPT-DF
95
15CLPT-PNM-B
15CLPT-GNM-B
CLPT-NL
CLPT-DF
95
15CLPT-PDM-B
15CLPT-GDM-B
CLPT-DL
—
BIL
(kV)
See page 70 for dimensions and diagrams of typical mounting.
End fittings supplied only when required.
Disconnect mountings provide a means for fuse extraction only. Do not use a disconnect mounting for load switching or fuse removal while energized.
Dimensions (see catalog number tables for values)
C
Indicator
B
A
Recommended fuseclips:
Description
Cat. No.
Open fuseclip for 1.56 (39.7 mm) / 1.6 (40.6 mm) dia. fuses
1A0835
Eaton.com/bussmannseries
39
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
15.5 kV time-current curves — minimum melting for 15CLPT_
1A
3E
0.5A
1.5A
10E
15CLPT-_
5E
Curve TC56353206
August 2011
Eaton.com/bussmannseries
40
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
15.5 kV time-current curves — total clearing for 15CLPT_
0.5A
1A
1.5A
3E
5E
10E
15CLPT-_E
Eaton.com/bussmannseries
41
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
15.5 kV peak let-through curves for 15CLPT_
10E
5E
1A & 1.5A
3E
0.5A
15CLPT-_
Curve TC63934001
March 2013
Eaton.com/bussmannseries
42
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
15.5 kV time-current curves — minimum melting for 15NCLPT_
0.5E-A
1E-A
2E
3E
5E
10E
15NCLPT-_
Curve TC70548303
December 2008
Eaton.com/bussmannseries
43
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
15.5 kV Time-current curves — total clearing for 15NCLPT_
0.5E-A
1E-A
2E-A
3E
5E
10E
15NCLPT-_
Curve TC70548403
December 2008
Eaton.com/bussmannseries
44
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
15.5 kV Peak let-through curves for 15NCLPT_
10E
5E
3E
1E-A & 2E-A
0.5A
15NCLPT-_
Curve TC63934002
December 2008
Eaton.com/bussmannseries
45
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
2E (CAVH)
1E (CAVH)
0.5E (CAVH)
15.5 kV time-current curves — minimum melting for 15.5CAV_ and 15.5CAVH_
7E (CAV)
3E (CAV)
15.5CAV_, 15.5CAVH_
Eaton.com/bussmannseries
46
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
2E (CAVH)
1E (CAVH)
0.5E (CAVH)
15.5 kV time-current curves — total clearing for 15.5CAVH_
7E (CAV)
3E (CAV)
15.5CAV_, 15.5CAVH_
Eaton.com/bussmannseries
47
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
PEAK CUT-OFF CURRENT IN KILOAMPS
15.5 kV peak let-through curves for 15.5CAVH_
2E (CAVH)
1E (CAVH)
0.5E (CAVH)
15.5CAVH_
RMS SYMMETRICAL PROSPECTIVE CURRENT IN KILOAMPS
Eaton.com/bussmannseries
48
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
17.5 kV maximum system voltage
Amp rating
2
4
6
Length A
8.7 (221)
Dimensions - in (mm)
Diameter B
Clip centers C
1.6 (41)
7.5 (190)
10
Catalog No. (Interrupting rating - kA)
Indicating
Non-indicating
—
17.5CAV2 (40)
—
17.5CAV4 (40)
—
17.5CAV6 (40)
—
17.5CAV10 (40)
Recommended fuseclip
1A0835
Dimensions (see catalog number tables for values)
C
B
A
Recommended fuseclips:
Description
Cat. No.
Open fuseclip for 1.56 (39.7 mm) / 1.6 (40.6 mm) dia. fuses
1A0835
Eaton.com/bussmannseries
49
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
17.5 kV time-current curves — minimum melting for 17.5CAV_
2A (CAV)
4A (CAV)
6A (CAV)
10A (CAV)
7.5CAV_
Eaton.com/bussmannseries
50
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
24 kV maximum system voltage
Amp rating
2
3
4
Dimensions - in (mm)
Catalog No. (Interrupting rating - kA)
Diameter B
Clip centers C
Indicating
Non-indicating
—
24CAV2 (40)
13.49 (340)
1.6 (41)
12.2 (310)
—
24CAV3 (40)
—
24CAV4 (40)
Length A
Recommended fuseclip
1A0835
Dimensions (see catalog number tables for values)
C
B
A
Recommended fuseclips:
Description
Cat. No.
Open fuseclip for 1.56 (39.7 mm) / 1.6 (40.6 mm) dia. fuses
1A0835
Eaton.com/bussmannseries
51
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
24 kV time-current curves — minimum melting for 24CAV_
2A (CAV)
3A (CAV)
4A (CAV)
24CAV_
Eaton.com/bussmannseries
52
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
25.5 kV maximum system voltage
Amp rating
0.5
1
Length A
17.6 (447)
17.6 (447)
Dimensions - in (mm)
Catalog No. (interrupting rating - kA)
Diameter B
Clip centers C
Indicating
Non-indicating
1.6 (41)
16.1 (410)
25CLPT-.5 (43.5)†
—
1.6 (41)
16.1 (410)
25CLPT-1 (43.5)†
—
Recommended
fuseclip
1A0835
† Does not comply with ANSI C37.46 for “E” rating.
CLPT Type Mountings and Hardware 25.5 kV Maximum (23 kV Nominal)
Amp rating
0.5–1
*
**
†
Fuse mounting
type*
Non-disconnect
Disconnect
BIL
(kV)
150
150
Catalog number
Mounting (including live parts, end fittings)**
Porcelain insulator
Glass-polyester insulator
25CLPT-PNM-A
—
25CLPT-PDM-A
—
Live parts (including
end fittings)**
25CLPT-NL
25CLPT-DL
End fittings
(disconnect only)
—
CLPT-DF
See page 70 for dimensions and diagrams of typical mounting.
End fittings supplied only when required.
Disconnect mountings provide a means for fuse extraction only. Do not use a disconnect mounting for load switching or fuse removal while energized.
Dimensions (see catalog number tables for values)
C
Indicator
B
A
Recommended fuseclips:
Description
Cat. No.
Open fuseclip for 1.56 (39.7 mm) / 1.6 (40.6 mm) dia. fuses
1A0835
Eaton.com/bussmannseries
53
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
25.5 kV time-current curves — minimum melting for 25CLPT_
0.5A
1A
25CLPT-_
0.5, and 1 A fuse melt times in the dotted line region
may not be assured due to manufacturing variations.
The dotted lines show nominal operation. Some individual
fuses may not open until current at 10-second mark is applied.
Curve TC56353208
December 2008
Eaton.com/bussmannseries
54
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
25.5 kV time-current curves — total clearing for 25CLPT_
0.5A
1A
25CLPT-_
Curve TC56353308
December 2008
Eaton.com/bussmannseries
55
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
25.5 kV Peak let-through curves for 25CLPT_
1A
0.5A
25CLPT-_
Curve TC63933901
December 2008
Eaton.com/bussmannseries
56
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
36 kV maximum system voltage
Amp rating
2
4
Length A
17.3 (439)
Dimensions - in (mm)
Diameter B
Clip centers C
1.6 (41)
16.1 (410)
—
—
Catalog No. (Interrupting rating - kA)
Indicating
Non-indicating
36CAV2 (40)
36CAV4 (40)
Recommended
fuseclip
1A0835
Dimensions (see catalog number tables for values)
C
B
A
Recommended fuseclips:
Description
Cat. No.
Open fuseclip for 1.56 (39.7 mm) / 1.6 (40.6 mm) dia. fuses
1A0835
Eaton.com/bussmannseries
57
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
36 kV Time-current curves — minimum melting for 36CAV_
2A (CAV)
4A (CAV)
36CAV_
Eaton.com/bussmannseries
58
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
38 kV maximum system voltage
Amp rating
0.5
0.5
1
2
4
Length A
17.3 (439)
18.6 (472)
17.3 (439)
17.3 (439)
17.3 (439)
Dimensions - in (mm)
Catalog No. (interrupting
Diameter B
Clip centers C
Indicating
1.6 (41)
16.1 (409)
38CAVH0.5E (40)
1.6 (41)
17.1 (434)
38CLPT-0.5 (43.5)†
1.6 (41)
16.1 (409)
38CAVH1E (40)
1.6 (41)
16.1 (409)
38CAVH2E (40)
1.6 (41)
16.1 (409)
—
rating - kA)
Non-indicating
—
—
—
—
38CAV4E (40)
Recommended fuseclip
1A0835
† Does not comply with ANSI C37.46 for “E” rating.
CLPT Type Mountings and Hardware 38 kV Maximum (34.5 kV Nominal)
Amp rating
0.5
Catalog number
Fuse mounting Mounting (including Live Parts, End Fittings)*
type
Porcelain insulator
Glass-polyester insulator
Disconnect†
Not applicable
Not applicable
Non-disconnect 38CLPT-PNM-A
Not applicable
Live Parts
(including end fittings)*
CLPT-NL
CLPT-DL
End fittings
(disconnect only)
CLPT-DF
—
* End fittings supplied only when required.
† Disconnect mountings provide a means for fuse extraction only. Do not use a disconnect mounting for load switching or fuse removal while energized.
Dimensions (see catalog number tables for values)
C
Indicator
B
A
Recommended fuseclip:
Description
Cat. No.
Open fuseclip for 1.56 (39.7 mm) / 1.6 (40.6 mm) dia. fuses
1A0835
Eaton.com/bussmannseries
59
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
2A (CAVH)
1A (CAVH)
0.5A (CAVH)
38 kV time-current curves — minimum melting for 38CAV_ and 38CAVH
4A (CAV)
38CAV_, 38CAVH_
Eaton.com/bussmannseries
60
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
2A (CAVH)
1A (CAVH)
0.5A (CAVH)
38 kV time-current curves — total clearing for 38CAV_ and 38CAVH
4A (CAV)
38CAV_, 38CAVH_
Eaton.com/bussmannseries
61
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
38 kV peak let-through curves for 38CAVH
2A (CAVH)
1A (CAVH)
0.5A (CAVH)
38CAVH_
Eaton.com/bussmannseries
62
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
38 kV time-current curves — minimum melting for 38CLPT_
0.5A
38CLPT_
0.5 A fuse melt times in the dotted line region
may not be assured due to manufacturing variations.
The dotted lines show nominal operation. Some individual
fuses may not open until current at 10-second mark is applied.
Curve TC56353208
December 2008
Eaton.com/bussmannseries
63
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
38 kV time-current curves — total clearing for 38CLPT_
0.5A
38CLPT_
Curve TC56353308
December 2008
Eaton.com/bussmannseries
64
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
38 kV peak let-through curves for 38CLPT_
0.5A
38CLPT_
Curve TC63933901
Eaton.com/bussmannseries
December 2008
65
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
PT fuse mountings - in (mm)
Catalog number
Hole centers A Hole centers B Overall length C
5.5kV Disconnect†
5CLPT-GDM-A
9.37 (238)
6 (152.4)
18.63 (473.2)
5CLPT-PDM-A
9.37 (238)
6 (152.4)
18.63 (473.2)
5.5kV Non-disconnect
5CLPT-GNM-A
9.37 (238)
5CLPT-PNM-A
9.37 (238)
8.3kV Disconnect†
8CLPT-GDM-A
9.37 (238)
8CLPT-GDM-B
9.37 (238)
8CLPT-PDM-A
9.37 (238)
8CLPT-PDM-B
12.74 (323.6)
8.3kV Non-disconnect
8CLPT-GNM-A
9.37 (238)
8CLPT-PNM-A
9.37 (238)
8CLPT-GNM-B
12.75 (323.8)
8CLPT-PNM-B
12.75 (323.8)
15.5kV Disconnect†
15CLPT-GDM-A
12.74 (323.6)
15CLPT-PDM-A
12.74 (323.6)
15CLPT-GDM-B
17.46 (443.5)
15CLPT-PDM-B
17.46 (443.5)
15.5kV Non-disconnect
15CLPT-GNM-A
12.74 (323.6)
15CLPT-PNM-A
12.74 (323.6)
15CLPT-GNM-B
17.46 (443.5)
15CLPT-PNM-B
17.46 (443.5)
25.5kV Disconnect†
25CLPT-PDM-A
19.12 (485.6)
25.5kV Non-disconnect
25CLPT-PNM-A
26.63 (676.4)
38kV Non-disconnect
38CLPT-PNM-A
19.12 (485.6)
Hole Inset D
Hole centers E
Contact height F
Overall height G
BIL
kV
0.75 (19)
0.75 (19)
1.75 (44.4)
1.75 (44.4)
4.5 (114.3)
4.5 (114.3)
9.56 (242.8)
9.56 (242.8)
60
60
4.5 (114.3)
4.5 (114.3)
6.94 (176.2)
6.94 (176.2)
60
60
6 (152.4)
6 (152.4)
18.63 (473.2)
18.63 (473.2)
0.75 (19)
0.75 (19)
1.75 (44.4)
1.75 (44.4)
6
6
6
6
(152.4)
(152.4)
(152.4)
(152.4)
18.63 (473.2)
18.63 (473.2)
18.63 (473.2)
22 (558.8)
0.75
0.75
0.75
0.75
(19)
(19)
(19)
(19)
1.75
1.75
1.75
1.75
(44.4)
(44.4)
(44.4)
(44.4)
7
7
7
7
(177.8)
(177.8)
(177.8)
(177.8)
12.06
12.06
12.06
12.06
(306.3)
(306.3)
(306.3)
(306.3)
75
75
75
75
6
6
6
6
(152.4)
(152.4)
(152.4)
(152.4)
18.63 (473.2)
18.63 (473.2)
22 (558.8)
22 (558.8)
0.75
0.75
0.75
0.75
(19)
(19)
(19)
(19)
1.75
1.75
1.75
1.75
(44.4)
(44.4)
(44.4)
(44.4)
7
7
7
7
(177.8)
(177.8)
(177.8)
(177.8)
9.44
9.44
9.44
9.44
(239.8)
(239.8)
(239.8)
(239.8)
75
75
75
75
6
6
6
6
(152.4)
(152.4)
(152.4)
(152.4)
22 (558.8)
22 (558.8)
26.63 (676.4)
26.63 (676.4)
0.75
0.75
0.75
0.75
(19)
(19)
(19)
(19)
1.75
1.75
1.75
1.75
(44.4)
(44.4)
(44.4)
(44.4)
7
7
7
7
(177.8)
(177.8)
(177.8)
(177.8)
12.06
12.06
12.06
12.06
(306.3)
(306.3)
(306.3)
(306.3)
95
95
95
95
6
6
6
6
(152.4)
(152.4)
(152.4)
(152.4)
22 (558.8)
22 (558.8)
26.63 (676.4)
26.63 (676.4)
0.75
0.75
0.75
0.75
(19)
(19)
(19)
(19)
1.75
1.75
1.75
1.75
(44.4)
(44.4)
(44.4)
(44.4)
7
7
7
7
(177.8)
(177.8)
(177.8)
(177.8)
9.44
9.44
9.44
9.44
(239.8)
(239.8)
(239.8)
(239.8)
95
95
95
95
7 (177.8)
26.63 (676.4)
0.75 (19)
1.75 (44.4)
12 (304.8)
17.06 (433.3)
150
7 (177.8)
26.63 (676.4)
0.75 (19)
1.75 (44.4)
12 (304.8)
14.75 (374.6)
150
7 (177.8)
26.63 (676.4)
0.75 (19)
1.75 (44.4)
12 (304.8)
14.75 (374.6)
150
† Disconnect mountings provide a means for fuse extraction only. Do not use a disconnect mounting for load switching or fuse removal while energized.
Eaton.com/bussmannseries
66
PT medium voltage fuses for potential and
small power transformers
Technical Data 6002
Effective September 2020
Disconnect mountings†
Non-disconnect mountings
G
G
F
D
F
D
E
E
C
A
A
C
E
E
D
B
D
B
† Disconnect mountings provide a means for fuse extraction only. Do not use
a disconnect mounting for load switching or fuse removal while energized.
Eaton.com/bussmannseries
67
The only controlled copy of this data sheet is the electronic read-only version located on the Eaton network drive. All other copies of this 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. Eaton reserves the right, without notice, to change design or construction of any products and to discontinue
or limit distribution of any products. Eaton 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.
For Eaton’s Bussmann series
product information,
call 1-855-287-7626 or visit:
Eaton.com/bussmannseries
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Bussmann Division
114 Old State Road
Ellisville, MO 63021
United States
Eaton.com/bussmannseries
© 2020 Eaton
All Rights Reserved
Publication No. 6002 – BU-SB15149
September 2020
Eaton and Bussmann are valuable
trademarks of Eaton in the US and other
countries. You are not permitted to use the
Eaton trademarks without prior written
consent of Eaton.
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