0~

Precision Engineering & Proven AccuracyMake Kearney Fuse Links the Choice of Utilities Worldwide!•

Type K • Type T • Type KS • Type Slow-Quick • Secondary Indicating Fuses

For more than 50 years, Kearney has manufactured fuse links to exactingstandards - ANSI and NEMA included. Today, Kearney fuse links remainthe leading, dependable choice of utility coordination engineers andfield personnel worldwide .

Versatile Options• Kearney fuse links provide the most

economical way to achieve servicecontinuity.

•

Ideal for 4 to 38 kV systems using anytype of cutout .

•

Available with solid or removablebuttonhead .

Pro ven AccuracyRemovablebuttonhead

•

Inventive design and experienced, hand-crafted manufacturing ensurepremium performance .

•

Pure tin fusible elements are drawn to precise tolerances .

Ongoing Analysis•

Periodic random production line testing ensures consistently high quality,fuse link after fuse link .

•

Al¡ Kearney fuse links meet the latest versions of ANSI C37.42 and NEMASG2.1 standards.

Low Melt Characteristics Handle Overloads ExceptionallyKearney fuse links are designed with low melting temperature characteristicsof either tin- or solder-filled dual element construction . Low melting temperaturefuse links have exceptional overload capability. They are designed to carry150% of their current rating continuously without damaging the fuse link or thecutout fuse-holder.

Dual Element Design Offers Excellent Surge Withstand CapabilityKearney Types KS and Slow-Quick fuse links, and al¡ 1 and 2 ampere Types Kand T use a unique type of element construction : two elements in series,connected by a solder joint - hence dual element construction .

Dual elements allow the fuse to respond as low temperature single elementfuses for long-time overloads, yet have superior surge withstand capability.Kearney dual element fuse links have up to 26 times more surge withstandcapability than single element fuse links .

Solidbuttonhead

Superior Construction Ensures Reliable ServiceTin-plated copper BUTTON TERMINALis engineered for conductivity. For easy

identification, rating and type are stamped on head .

Pure copper BODY TERMINALassures integrity of solder connections.

STRAIN WIREends are curled and coatedwith abrasive to provide a

30 lb. minimum tension rating.

WASHER is a tin-plated, copperalloy(on 1-50 amp links).

TIN ELEMENTS provide greateraccuracy, cooleroperation and better overload characteristics .

FUSE TU BE selected for precise balancebetween length and bursting strength. Epoxycoated for weatherproofing; fiber liner generatesdeionized gas .

Kearney Fuse Link SelectionTypes K and T are designed for expulsion cutouts. These two fuse Iink types are designed to cany 150%of their rated current continuously without damage to the fuse link or cutout fuse holder

7ype K = Fast¡

Meets ANSI/NEMA requirements for a "fast"fuse Iink.

¡

Nominal speed ratio* : 7 .

¡

Well suited for fast time-current applications,such as capacitor protection .

Type KS = Very SIowExcellent for transformer protection, Type KSfuse links employ dual element construction .They conform with the ANSI transformer loadingcurve, and provide the full load and overloadcapability designed finto the transformer. Itsbuilt-in surge capacity allows the fuse to rideout short time currents due to lightning,switching and momentary current overloads .

¡

Featuring dual element construction for highsurge withstand capability .

¡

Nominal speed ratio*: 20 .

¡ Classified as very slow, Type KS has greatersurge withstand than the Type T, making it agood choice for line fusing and transformerprotection .

Type T = Slow¡

Meets ANSI/NEMA requirements for a "slow"fuse link .

¡

Nominal speed ratio* : 12 .

¡

Slower time-current characteristics for goodcoordination with relays and reclosers .

Type Slow-Quick = Transformer Protection

¡

Dual element construction allows time currentcharacteristic to closely match the ANSI loadingcurve for transformers . Also provides excellentsurge withstand to avoid nuisance blowing fromlightning and switching surges .

¡

Nominal speed ratio* : 32 .¡

Specially designed for transformer protection .

* The speed ratio of al• fuse Iink sizes 100 amperes andbelow is the ratio between the current that melts the fusein 0.1 second to the current that melts the fuse in 300seconds. The higher the ratio, the slower the speed ofmelting. For fuses rated aboye 100 amperes, the speedratio is between the melting currents at 0 .1 second and600 seconds.

Speed RatioSINGLE ELEMENT DUAL ELEMENT

Designation Fast Slow Very Slow Extra Slow7ype K T KS Slow-Quick

Speed Ratio 6-8

10-13

20

32

I^

Fuse Link Types Coord•nate with Any SystemCURRENT IN AMPERES

faC

i

SLOW-OUICK

K

T KS

This chart compares the speed ratios available with standard Kearney fuselink types which are fully adaptable to various coordination needs .

Fuse Link DimensionsD

1000

300 T ransformers, switches, relays,conductors and similarelectrical equipment are

exposed to various leveis of currentduring normal operation . Generally,electrical devices can withstand high

currents for a short -period of time,and low current for longer periods oftime without thermal or mechanicaldamage. The ability to withstandvarious levels of current for variousperiods of time is referred to as time-current characteristics .

Coordination of power systemsinvolves the selection of fuse links toprotect equipment with various time-current characteristics while

0 .1

coordinating with reclosers, circuit

breakers, sectionalizers, relays andother fuses. Kearney offers four typesof fuse links with a wide range of time-

.01

current characteristics; refer to thetable at the left .

AMP RATING

A B

C

D L

K&T1-50 12"/12.7 mm 30/19.05 mm 5"/127 mm .269"/6.83 mm 23"/584.20 mm

65-100 3/4"/19 .05 mm 5"/127 mm .369"/9.37 mm 23"/584.20 mm140-200 1 "/25.4 mm 5"/127 mm .500"/12.7 mm 23"/584.20 mm

KS1-50 12"/12.7 mm 3/4"/19.05 mm 5"/127 mm .269"/6.83 mm 23"/584.20 mm

65-100 W"/19.05 mm 5"/127 mm .369"/9.37 mm 23"/584.20 mm100-200 1 "/25.4 mm 5"/127 mm .500"/12.7 mm 23"/584.20 mm

Slow-Quick0.2-21 12"/12.7 mm 3/4"/19.05 mm 5"/127 mm .269"/6.83 mm 23"/584.20 mm32-46 3/4"/19.05 mm 971277 mm .369/9.37 mm 23"/584.20 mm

F use link ratings recommended in these tables will carry the fui• load of atransformer continuously and will open in five minutes when the transformerload is approximately three times fui• load . Smaller or larger fuse link ratings

may be used to give the desired correlation of protection and continuity of service .These tables are to be used as a guide until a more detailed study can be made .

Single Phase Transformer InstallationsUse this table for all single phase, three phase "WYE" and outside legs of open deltaconnected transformers. Do not fuse neutral.

Three Phase Transformer InstallationsUse this table for closed delta and common legs of open delta connected transformers .Use the fuse size recommended for the largest transformer connected to the lead underconsideration .

Transformer Fusing Tables

kVA Rated Line Voltage (kV)Rating 2.4 4.16 4.8 7.2 8.32 12 12 .47 13.2 14.4 22.9

3 3 2 2 1 1 1 1 1 1 15 6 3 3 2 2 1 1 1 1 17 .5 8 6 3 3 2 2 2 1 1 1

10 10 6 6 3 3 2 2 2 2 115 15 8 8 6 6 3 3 3 3 225 25 15 12 8 6 6 6 6 3 337.5 40 25 20 12 10 8 6 6 6 350 50 30 25 15 15 10 10 10 8 675 80 50 40 25 25 15 15 15 12 8

100 100 65 50 30 30 20 20 20 15 10150 140 100 80 50 50 30 30 30 25 15167 140 100 80 65 50 30 30 30 30 20200 200 100 100 65 65 40 40 40 30 20250 200 140 100 80 80 50 50 50 40 25333 200 140 140 100 100 65 65 65 65 40500 - 200 200 140 140 100 100 100 80 50

kVA Rated Line Voltage (kV)Rating 2.4 4.16 4.8 7.2 7.62 12 13.2 14.4 22.9

3 2 1 1 1 1 1 1 1 15 3 2 2 1 1 1 1 1 17 .5 6 3 2 2 1 1 1 1 1

10 6 3 3 2 2 1 1 1 115 8 6 6 3 3 2 2 2 125 15 8 8 6 6 3 3 3 237.5 25 12 10 8 8 6 3 3 350 30 15 15 10 10 6 6 6 375 50 25 25 15 15 8 8 8 6

100 65 30 30 20 20 12 10 10 6150 100 50 50 30 30 20 15 15 10167 100 65 50 30 30 20 20 15 10200 140 65 35 40 40 25 20 20 12250 140 80 80 50 50 30 25 25 15333 140 100 100 65 65 40 40 30 20500 200 140 140 100 100 65 50 50 30

Convenient Packaging Features Clear Identification, Easy Access

Fuse Link Ordering Information

NOTE: Al• fuse Iinks are 23"/584 .2 mm long . Types K, T and Slow-Quick are available in 26"/660.4 mm lengths.To order 26"/660.4 mm Slow-Quick fuse links, change the suffix -60 to -26.Example: To order a 0.4 amp, 267660.4 mm Slow-Quick fuse, specify catalog number 0.4SQ-26.To order 26"/660.4 mm long Type K or T fuse links, add -26 to the catalog number.Example: To order a 4 amp, 267660.4 mm solid button Type K fuse Iink, specify catalog number A31004-26.

Kearney fuse Iinks are individuallypackaged in transparent plastic bagsthat are scored for easy opening, evenwith gloves. Bagged fuses are packedin an overcarton for protection andease of handling . For quick identifica-tion, the catalog number, fuse type andamp rating are clearly marked on eachbag and al• cartons .

AII orders are shipped and invoiced in standard carton quantities . The standard carton is 25 for mostfuse Iinks, except those coded ¡ below; standard carton for catalog numbers marked ¡ is 10 .

Minimum order for end column pricing of fuse Iinks is 500 pieces. Minimum may consist of quantities fromany fuse Iink type .

Fuse Iinks listed below are for 15kV systems ; types K and T are available for 38kV systems . To order fuseIinks for 38kV systems, change the catalog number as follows : Solid button - Add -53 at the end of thecatalog number. Example: To orderA31001, change catalog number to A31001-53 . Removable button :Add -53 before -60 in the catalog number . Example: To order 31001-60, change the number to 31001-53-60.

Fuse Link Catalog Numbers

TYPE K TYPE T TYPE KS TYPE SLOW-QUICK*

AMPRATING

SOLIDBUTTON

REMOVABLEBUTTON

SOLIDBUTTON

REMOVABLEBUTTON

SOLIDBUTTON

REMOVABLEBUTTON

AMPRATING

REMOVABLEBUTTON

1 A31001 31001-60 A51001 51001-60 A21001 21001-60 0.2 0.2S0-602 A31002 31002-60 A51002 51002-60 A21002 21002-60 0.4 0 .4SQ-603 A31003 31003-60 A51003 51003-60 A21003 21003-60 0.6 0 .6S0-604 A31004 31004-60 0.7 0.7S0-605 A31005 31005-60 A51005 51005-60 1 .0 1 .OSQ-606 A31006 31006-60 A51006 51006-60 A21006

21006-60 1 .3 1 .3SQ-607 A31007 31007-60 51007-60 1 .4 1 .4S0-608 A31008 31008-60 A51008 51008-60 A21008 21008-60 1 .6 1 .6SQ-6010 A31010 31010-60 A51010 51010-60 A21010 21010-60 2.1 2 .1 SO-6012 A31012 31012-60 A51012 51012-60 A21012 _ 21012-60 3.1 3 .1 SO-6015 A31015 31015-60 A51015 51015-60 A21015 21015-60 3.5 3.5SQ-6020 A31020 31020-60 A51020 51020-60 A21020 21020-60 4.2 4.2S0-6025 A31025 31025-60 A51025 51025-60 A21025 21025-60 5 .2 5.2SQ-6030 A31030 31030-60 A51030 51030-60 A21030 21030-60 6.3 6.3SQ-6040 A31040 31040-60 A51040 51040-60 A21040 21040-60 7 .0 7.OSQ-6050 A31050 31050-60 A51050 51050-60 A21050 21050-60 7 .8 7.8SQ-6065 A31065 31065-60 A51065 51065-60 A21065 21065-60 10 .4 10.4SQ-6080 A31080 31080-60 A51080 51080-60 A21080 21080-60 14 14SQ-60100 A31100 31100-60 A51100 51100-60 A21100 21100-60 21 21SQ-60140 A31140 ¡ 31140-60¡ A51140 ¡ 51140-60¡ A21140 ¡ 21140-60 32 32SO-60200 A31200 ¡ 31200-60 ¡ A51200 ¡ 51200-60¡ 1

A21200 ¡ 21200-60 46 46SO-60