327 40 Kearney Fuse Links

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Kearney™ fuse links

Technical Data 327-40 Effective March 2014

Supersedes December 2013

Eaton's Cooper Power Systems Kearney™ fuse

links can be applied to a variety of applications

requiring overcurrent protection of distribution

systems and equipment. When properly coordinated

with other overcurrent protective devices,

sectionalizing to isolate faulted feeder branches or

equipment can be accomplished.

Kearney fuse links are available in a variety of

types offering a wide selection of operating

characteristics. The links incorporate low melting

temperature elements, captive washers, high-

resistance strain wires, and color-coded high

strength tubes. The low temperature melting

tin elements enhance overload capability by

guaranteeing non-damageability of the fuse tubes.

These elements are capable of absorbing vibration

as well as thermal shock due to current surges

and heating and cooling throughout the daily load

cycle. They can be further distinguished by their

years of superior service proven by Time Current

Characteristic (TCC) Curve verification of aged fuse

links. Consult your Eaton's Cooper Power Systems

sales representative for more details.

The fuse links have been designed and tested to

the IEEE Std C37.42™ standard.

The following are the types of fuse links offered:

• Type K

• Type T

• Type 200™ (N)

• Type KS

• Type SQ

• Type QA™

• Type X

• Secondary Indicating Fuses

General

Internal construction

All Kearney fuse links are designed with low melting temperature

element components of either tin or solder filled dual element

construction. Each element material shipment from our supplier is

accompanied with a certification of quality and composition. The

diameter is verified in incoming inspection. Low melting temperature

fuse links Types K, T, 200, X and KS have exceptional overload

capability. They are designed to carry 150% of their continuous

current rating continuously without damage to the fuse link itself or

to the cutout fuseholder in which they are installed. (Care should be

exercised so that the current rating of the cutout is not exceeded.)

Tin element

Links using pure tin elements have a precision gauged strain

wire crimped in parallel to provide tension loading properties.

The tin element is soldered into position providing the industry’s

best possible electrical connection between the element and its

terminals. The low melting temperature of the tin allows all of the

fuse link components to operate at a lower temperature while

providing long term reliable TCC.

Dual element

There are two dual element designs. The dual element design

for 1 and 2 A K, KS, X, T, 200 (N), QA, and SQ 0.2 A - 1.45 A link

assemblies is composed of a heater coil mounted around a solder

pot that is soldered to a fuse element. Types KS and X links above

2 A and SQ links above 1.4 A have two wire elements in series

which are axially inserted into a soldered coil.

Dual element links which use solder coils are mechanically crimped

to the body and screw terminals. The elements are inserted into the

coil and meticulously gauged to assure that active element lengths

are maintained. The soldering process then permanently sets the

active elements to the proper TCC curve and guarantees positive

electrical continuity.

Dual elements allow the fuse to respond as low temperature single

element fuses for long time overloads, yet have superior lightning

surge withstand capability. Both types of links have up to 26 times

more surge withstand capability than single element fuse links.

Final construction

After passing in-process QA checks, high strength color coded tubes

are swaged to both the single and dual element fuse links. A unique

self locking washer and button is attached to the screw terminal.

Every fuse link is axial pull tested to verify mechanical strength

before packaging in the Kearney unique “lineman friendly” pull-tab

fuse packs.

Fuse link selection

Type K (tube color brown)

Kearney Type K fuse links have been tested to the IEEE Std C37.42™

standard requirements for a “fast” fuse. The nominal speed ratio

of Type K fuse links is 7. Type K fuse links are well suited where

“fast” time-current characteristics are desired such as for capacitor

protection.

Type 200 (N) (tube color green)

Kearney Type 200 fuse links are classified as “medium” speed

fuses, with a nominal speed ratio of 10. Type 200 fuse links provide

more surge withstand capability than Type K links, and provide good

coordination possibilities with relays and reclosers.

Type QA (tube color yellow)

Kearney Type QA fuse links are classified as “medium” speed fuse

links with a nominal speed ratio of 10. Type QA fuse links will carry

100% of the rated current continuously without damage, and provide

good coordination possibilities with relays and reclosers.

Figure 1. Fuse link features.

REMOVABLE

BUTTONS

Allow fuse links

to be used

in all open

and enclosed

cutouts, including

cutouts with arc-

shortening rods.

CAPTIVE WASHER

Will not fall off prior to

or during installation.

(Can be removed for

use where 1/2" but-

ton or no button is

required.)

SWAGED FERRULE

Extends around fuse link

tube to ensure single end

expulsion on low fault cur-

rents.

AMPERE SIZE

Marked on top of screw

terminal, so that it can be

seen after the fuse link is

installed in a fuseholder.

IDENTIFICATION

Fuse link type, ampere size

and date of manufacture

marked on periphery of screw

terminal.

FUSE LINK TYPE

Marked on length

of tube to aid in

identification of fuse

type.

COLOR CODE

High bust strength tube

color coded for each

fuse link to minimize the

potential of installing

wrong fuse link type.

SPRING

On all fuse links through 25

A to aid in clearance of low

level faults by ejecting the fuse

cable and creating a positive

element separation.

2

Technical Data 327-40

Effective March 2014

Kearney fuse links

www.cooperpower.com

Type T (tube color white)

Kearney Type T fuse links have been tested to the IEEE Std C37.42™

standard requirements for a “slow” fuse link. The nominal speed

ratio of Type T fuse links is 12. Type T fuse links provide slower time-

current characteristics than Types K, 200, and QA, and coordinate

well with relays and reclosers.

Type KS (tube color light-blue)

Kearney Type KS fuse links employ dual element construction which

gives the Type KS high surge withstand capability, and a nominal

speed ratio of 20. Classified as “very slow” fuse links, the Type KS

has greater surge current withstand capability than the Type T, and is

a good choice for line fusing and transformer protection.

Type X (tube color orange) and Type SQ (tube color brown)

Kearney Type X and SQ fuse links are specially designed for trans-

former protection. Type X and SQ fuse links employ dual element

construction, which allows the time- current characteristic to be care-

fully shaped to closely match the IEEE Std C57.91™ standard loading

curve for transformers while providing excellent surge withstand

to avoid nuisance blowing from lightning and switching surges. The

nominal speed ratio of the Type X and SQ fuse links is 32.

Packaging

All fuse links are packed in individual cartons for the maximum

protection and ease of use. Cartons are perforated for easy opening.

Fuse links can be removed with gloves on. Fuse Link Type and

Ampere Ratings are clearly marked on the carton. The print will not

smear or run.

Five Pack Sleeves: Fuse Link Type and Ampere Rating are clearly

marked on box front and end of cartons. Individual cartons are

tabbed so that remaining fuses stay securely in the carton as others

are removed.

Overcartons: All fuse links 100 A and below are packed in protective

overcartons 25 per box. Catalog Number, Fuse Link Type, Ampere

Rating, and Date of Manufacture are marked on the label for ease of

selection.

ote:N SQ links are individually packaged in transparent plastic bags. Bagged

fuses are packed in an overcarton for protection and ease of handling. The

catalog number, fuse type and amp rating are clearly marked on each bag and

on all cartons.

Comparative melting speed ratio chart

Electrical equipment such as transformers, switches, relays, and

conductors are exposed to various levels of current during normal

operation. Generally, electrical devices can withstand high currents

for a short period of time and low current for longer periods of time

without thermal or mechanical damage. The ability to withstand

various levels of current for various periods of time is referred to as

time-current characteristics.

Coordination of power systems involves the selection of fuse links

to protect equipment with various time-current characteristics while

coordinating with reclosers, circuit breakers, sectionalizers, relays,

and other fuses. Kearney offers six types of fuse links with a wide

range of time-current characteristics (refer to Table 1).

The speed ratio of all fuse link sizes 100 A and below is the ratio

between the current that melts the fuse in 0.1 seconds to the

current that melts the fuse in 300 seconds. The higher the ratio,

the slower the speed of melting. For fuses rated above 100 A, the

speed ratio is between the melting currents at 0.1 second and 600

seconds.

Table 1. Speed Ratio

Tin Element(s)

Slow T Dual Element

Designation Fast Medium Slow Very Slow Extra Slow

Type K 200, QA T KS X, SQ

Speed Ratio 6-8 7-11 10-13 20 32

Figure 2. This chart compares the six speed ratios available with

standard fuse link types which are fully adaptable to various

coordination needs.

0.01

0.1

1

10

100

1000

1 Minute

0000100010010115.0

Current in Amperes: x 1 at 25 kV.

Time in Seconds

XQA

K

200 TKS

SQ

3.5 A

50 A

3

Technical Data 327-40

Effective March 2014

Kearney fuse links

www.cooperpower.com

Table 3. Trip-O-Link™ Fuse Link Ordering Information

Current

Rating Type X Type

KS Type

200 Type QA Type K Type T

.33 42033 — — — — —

.50 42050 — — — — —

.75 42075 — — — — —

1.00 42100 22001 12001 6813 32001 52001

1.25 42125 — — — — —

1.50 42150 — — — — —

2 42200 22002 12002 6814 32002 52002

2.50 42250 — — — — —

2.75 42275 — — — — —

3—22003 12003 6815 32003 52003

3.50 42350 — — — — —

4 42400 — — — — —

5—22005 12005 6816 — —

5.50 42550 — — — — —

6— — — — 32006 52006

7 42007 22007 12007 6817 — —

8— — — — 32008 52008

10 42010 22010 12010 6818 32010 52010

12 — — — — 32012 52012

15 42015 22015 12015 6819 32015 52015

20 —22020 12020 6820 32020 52020

25 —22025 12025 6821 32025 52025

30 —22030 12030 7482 32030 52030

40 —22040 12040 7483 32040 52040

50 —22050 12050 7484 32050 52050

Ordering information

Table 2. Fit-All™ Fuse Link Ordering Information

Current

Rating Type X Type SQ Type KS Type 200 Type QA Type K Type T

0.2 —02SQ-60 — — — — —

0.3 —03SQ-60 — — — — —

0.33 41033CPS — — — — — — —

0.4 —04SQ-60 — — — — —

0.5 41050CPS — — — — — —

0.6 —06SQ-60 — — — — —

0.7 —07SQ-60 — — — — —

0.75 41075 — — — — — — —

1 41100CPS 10SQ-60 21001 11001 6413-2T 31001 51001CPS

1.25 41125 — — — — — —

1.3 —13SQ-60 — — — — —

1.4 —14SQ-60 — — — — —

1.5 41150 — — — — — —

1.6 —16SQ-60 — — — — —

2 41200 —21002 11002 6414-2T 31002CPS 51002

2.1 —21SQ-60 — — — — —

2.5 41250CPS — — — — — —

2.75 41275CPS — — — — — —

3— — 21003 11003 6415-2T 31003CPS 51003

3.1 —31SQ-60 — — — — —

3.5 41350 — — — — — —

4 41400 — — — — — —

4.2 —42SQ-60 — — — — —

5— — 21005 11005 6416-2T 31005 51005CPS

5.2 —52SQ-60 — — — — —

5.5 41550 — — — — — —

6— — 21006 — — 31006 51006

6.3 —63SQ-60 — — — — —

7 41007CPS 70SQ-60 21007 11007 6417-2T 31007 51007

7.8 —78SQ-60 — — — — —

8— ——11008 6417-8-2T 31008 51008CPS

10 41010CPS —21010CPS 11010 6418-2T 31010 51010CPS

10.4 —104SQ-60 — — — — —

12 — — — — — 31012 51012

14 —140SQ-60 — — — — —

15 41015CPS —21015 11015 6419-2T 31015 51015

20 — — 21020 11020 6420-2T 31020CPS 51020CPS

21 —210SQ-60 — — — — —

25 — — 21025 11025 6421-2T 31025CPS 51025

30 — — 21030 11030 6422-2T 31030CPS 51030CPS

32 —320SQ-60 — — — — —

40 — — 21040 11040CPS 6423-2T 31040CPS 51040CPS

46 —460SQ-60 — — — — —

50 — — 21050CPS 11050 6424-2T 31050CPS 51050CPS

60 — — — — 6425-2T — —

65 — — 21065 11065 —31065CPS 51065CPS

75 — ——11075 6426-2T — —

80 — — 21080CPS 11080 —31080CPS 51080CPS

85 — — — 11085 — — —

100 — — 21100CPS 11100 6427-2T 31100CPS 51100

125 — — 21125 11125 6428-2T — —

140 — — — — — 31140 51140

150 — — 21150CPS 11150 6429-2T — —

175 — ——11175 6724-2T — —

200 — — 21200CPS 11200 6725-2T 31200 51200

Notes:

1. Fit-All fuse links listed above have removable button heads. For non-removable button heads add

“A” in front of the part number. Exceptions: Non-removable button heads are not available for

Types X, SQ, QA links or 125 A, 150 A and 200 A Type 200 links.

2. Fit-All fuse links listed above are all 23” (584 mm) long. For 26” (660 mm) long fuses links add -29,

except the SQ links. For SQ links add -26.

4

Technical Data 327-40

Effective March 2014

Kearney fuse links

www.cooperpower.com

Table 4. Fit-All Fuse Link Dimensions

Current

Rating (A) Fuse Link Types

A*

Inches

(mm)

B*

Inches

(mm)

C*

Inches

(mm)

D*

Inches

(mm)

F*

Inches

(mm)

L*

Inches

(mm)

.50 to 2 X, KS, T, K, 200, QA .50

(13)

.75

(19)

5.38

(137)

.27

(6.8)

1.13

(29)

23.00

(584)

2.50 to 15 X .50

(13)

.75

(19)

5.38

(137)

.31

(7.7)

1.13

(29)

23.00

(584)

3 to 20 K .50

(13)

.75

(19)

5.38

(137)

.31

(7.7)

1.13

(29)

23.00

(584)

3 to 25 200, QA, KS, T .50

(13)

.75

(19)

5.38

(137)

.31

(7.7)

1.13

(29)

23.00

(584)

.2 to 1.4 SQ .50

(13)

.75

(19)

5.38

(137)

.27

(6.8)

N/A 23.00

(584)

1.6 to 42 SQ .50

(13)

.75

(19)

5.38

(137)

.31

(7.7)

N/A 23.00

(584)

25 to 50 K .50

(13)

.75

(19)

5.38

(137)

.31

(7.7)

N/A 23.00

(584)

30 to 50 T, KS, 200 .50

(13)

.75

(19)

5.38

(137)

.31

(7.7)

N/A 23.00

(584)

30 to 60 QA .50

(13)

.75

(19)

5.38

(137)

.31

(7.7)

N/A 23.00

(584)

65 to 100 K, T, KS, 200 —.75

(19)

5.38

(137)

.40

(10)

N/A 23.00

(584)

75 to 150 QA —.75

(19)

5.38

(137)

.40

(10)

N/A 23.00

(584)

125 to 200 KS, 200 —1

(25)

6.38

(162)

.50

(13)

N/A 23.00

(584)

140 to 200 K,T —1

(25)

6.38

(162)

.50

(13)

N/A 23.00

(584)

175 to 200 QA —1

(25)

6.38

(162)

.50

(13)

N/A 23.00

(584)

Figure 3. Trip-O-Link fuse links.

*See Figure 4

Figure 4. Fit-All fuse links.

* “L” dimension extends to the end of the fuse leader.

B

A

D

C

L*

F

8.5" (216 mm)

5

Technical Data 327-40

Effective March 2014

Kearney fuse links

www.cooperpower.com

Indicating type tubular secondary fuses

Indicating type tubular secondary fuses protect transformers and

capacitors from secondary overloads and faults. Each secondary

fuse has a spring locked red plastic flag which springs out from the

cartridge when the fuse link melts, indicating an outage. Fuses are

available with insulated or non-insulated leads.

Universal adapter assemblies

This universal adapter assembly will adapt Fit-All™ fuse links for use

in the cutouts that have bolt-type cable connections to connect the

upper as well as the lower cable. Note from the table that only five

sizes are required to adapt to any type fuse.

Table 5. Ordering Information for Indicating Type Tubular

Secondary Fuses

Current Rating (A) Tinned Leads Insulated Leads

10 8316 8316-5

15 8317 8317-5

20 8318 8318-5

25 8319 8319-5

30 8320 8320-5

40 8321 8321-5

50 8322 8322-5

60 8323 8323-5

75 8324 8324-5

100 8325 8325-5

125 8326 8326-5

150 8327 —

175 8328 —

200 8329 —

300 11405 —

Table 6. U-Adapter Assemblies*

For Types KS, X, K, T and 200 Fuses

Current Rating (A) Catalog Number

0.33-25 14036

30-50 14036-1

65-100 14036-2

125-150 14036-3

175-200 14036-4

* 10" length for all ampere ratings

Table 7. U-Adapter Assemblies*

For Type QA Fuse

Current Rating (A) Catalog Number

1-25 14037

30-50 14037-1

60-100 14037-2

125-150 14037-3

175-200 14037-4

* 10" length for all ampere ratings

Figure 5. Tubular secondary fuses.

– Flag in operated position

– Flag in operational position

Figure 6. Universal Adapter assemblies.

6

Technical Data 327-40

Effective March 2014

Kearney fuse links

www.cooperpower.com

Additional Information

Refer to the following literature for more information.

K-11000 AB Kearney Type N (200) Time Current Characteristic Curves

K-21000 AB Kearney Type KS Time Current Characteristic Curves

K-31000 AB Kearney Type K Time Current Characteristic Curves

K-41000 AB Kearney Type X Time Current Characteristic Curves

K-51000 AB Kearney Type T Time Current Characteristic Curves

K-6010-32 AB Kearney Type QA Time Current Characteristic Curves

K-SQ AB Kearney Type SQ Time Current Characteristic Curves

89012 Tin vs. Silver Links (PD Update No. 5)

R327-40-3 Kearney Fuse Links-Coordination Chart for Type 200 Fuse

Links

R327-40-4 Kearney Fuse Links-Coordination Chart for Type KS Fuse

Links

R327-40-5 Kearney Fuse Links-Coordination Chart for Type QA Fuse

Links

R327-40-6 Kearney Fuse Links-Coordination Chart for Type T Fuse

Links

R327-40-7 Kearney Fuse Links-Coordination Chart for Type T with

Type X Fuse Links

R327-40-8 Kearney Fuse Links-Coordination Chart for Type N (200)

with Type X Fuse Links

R327-40-9 Kearney Fuse Links-Coordination Chart for Type KS with

Type X Fuse Links

R327-40-10 Kearney Fuse Links-Coordination Chart for Type K with

Type X Fuse Links

R327-40-11 Kearney Fuse Links-Coordination Chart for Type QA with

Type X Fuse Links

R327-40-12 Kearney Fuse Links-Coordination Chart for Type K Fuse

Links

7

Technical Data 327-40

Effective March 2014

Kearney fuse links

www.cooperpower.com

Eaton, Cooper Power Systems, 200, QA,

Kearney, Trip-O-Link, and Fit-All are valuable

trademarks of Eaton in the U.S. and other

countries. You are not permitted to use the

these trademarks without the prior written

consent of Eaton.

IEEE Std C37.42™ and IEEE Std C57.91™

standards are trademarks of the Institute of

Electrical and Electronics Engineers, Inc.,

(IEEE). This publication is not endorsed or

approved by the IEEE.

IEEE® is a registered trademark of the

Institute of Electrical and Electronics

Engineers, Inc.

Kearney fuse links

Eaton

1000 Eaton Boulevard

Cleveland, OH 44122

United States

Eaton.com

Eaton’s Cooper Power Systems

Business

2300 Badger Drive

Waukesha, WI 53188

United States

Cooperpower.com

© 2014 Eaton

All Rights Reserved

Printed in USA

Publication No. 327-40

Technical Data 327-40

Effective March 2014

For Eaton's Cooper Power

Systems Kearney fuse link

product information, call

1-877-277-47636 or visit:

www.cooperpower.com.