Tips & News - September 2012

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VOL. 16 NO. 3 | SEPTEMBER 2012 www. hubbe l l powe r s y s t ems . com ENDURING PRODUCTS AND PEOPLE YOU CAN DEPEND ON. TIPS NEWS

CELEBRATING 75 YEARS of keeping lineman safe on the job.

C O M M U N I C A T I O N S

H U B B E L L OUTSIDE PLANT

QUALITY • INNOVATION • CUSTOMER SERVICE

Hubbell Power Systems supplies products to meet your outside plant, aerial and burial needs. • Aerial Pole Line Hardware • Anchoring Systems • Deadends and Connectors • Polymer Concrete Enclosures and Pads Chance ® Anderson™ Fargo ® Quazite ® Hubbell ®

Powerful Partnership. Together, we can make a difference.

“Hubbell is committed to reducing harmful impacts to the environment… Our efforts will afford the next generation a future of brighter tomorrows” Join Hubbell Power Systems in support of sustainable business practices. Sign up for electronic statements, electronic invoices, and ACH payments. SIMPLE. SECURE. SMART.

– Tim Powers, Chairman, CEO & President Hubbell Incorporated

Call us at 573-682-8508 or 573.682.8816 and start making a difference today.

NEWS

Upcoming Shows

SEPTEMBER 10 – 13 Solar Power Int Orlando, FL 11 – 14 ARTBA (Road & Trans Builders) Memphis, TN 12 – 14 Transmission & Sub SymposiumUniv TX, Arlington 16 – 18 AREMAAmerican Railway Eng Chicago, IL 18 – 20 UPMG Louisville, KY 24 – 28 Hands On Distributor Training Aiken, SC 24 – 26 FTTHDallas, TX 25 – 27 DistribuTech, Brazil, Rio De Janeiro, Brazil 29 – 30WEFTEC (Water Equip) NewOrleans, LA 30 – Oct 2 UPMG Seattle, WA OCTOBER 1 – 5 Finepoint Circuit Breaker Conf Pittsburgh, PA 3 – 6 NCSEA St. Louis, MO 10 – 13 Lineman’s Rodeo Overland Park, KS 17 – 19 SCTE Cable Tec Orlando, FL 18 – 20 ASCE Conference Quebec, Canada 20 – 23 USMA Scottsdale, AZ 29 – 30 ASPE Engineered Plumbing Charlotte, NC 11 SCE&G Equipment ShowColumbia, SC 12 CEEUS Columbia, SC

HPSWadsworth, Ohio Supports United WayDayofAction Special thanks to Lisa Pelfrey, Barb Geimer, Mike Comber, Ed Nyszczy and Michael Hearne of Hubbell Power Sys- tems (HPS) in Wadsworth, Ohio, who recently participated in this year’s Unit- ed Way Day of Action. Across America on Thursday, June 21, people of all

ages, backgrounds and abilities donated their time and talent to help others. Last year, more than258 communities across eachof the 50 states andPuertoRicohosted aDay of Action,benefittingmorethan242,680people!HPS’svolunteerstookpartbyvolunteering for aKidneyFoundationofMedinaCounty local serviceproject.

Congratulations to Dick Erdel on 40 years ofServicewithHPS!We’vebeentoldthatsome of youknowDickbetter as Erdel the Turtle and fondly remember the 70s as the Erdel Years. For the rest, you know Dick as the Ringmster at our trade shows and our MadMan– I mean AdMan- for 39 years. It's been a great 40 years; thanks for all your hardwork, Dick!

NOVEMBER 14 – 15 Outside Plant Denver, CO

A rich history like no other...

Women lineman forGrandValley Rural Power Lines, Inc

The firstAdManager

1939-1942

1947-1948

1956-1957

TIPS NEWS & ANNIVERSARY ISSUE

CELEBRATING 75 YEARS of keeping lineman safe on the job.

2003-2007

1995-1996

1975-1976 1977-1979 1980-1983

Recognize this handsome man? It’s EdWest, our Test Lab Manager.

ChristmasCardContest

1956-1957

1967-1968

S U R G E P R O T E C T I O N

Safety and Surge Protection – Wrapped Into One

• Fully wrapped Metal Oxide Varistor (MOV) block modules ensure compliance with all requirements of IEEE Std. C62.11, including safe failure mode • Provides excellent protection against lightning or switching surges • Operating interface conforms to figure 5 of IEEE Std. 386 • Fully shielded and submersible, either continuously or intermittently, to a depth of 6 feet (2m) • ID band and stamp on end cap provides clear identification of voltage specifications • 36 inch standard lead length; other lengths are available • Internal contact molded into conductive insert to fully seal the chambers • Stainless steel bracket resists rust and corrosion Parkingstand Lightning Arrester 200 Amp 15 kV FEATURES:

HUBBELL ®

ELASTIMOLD ®

COOPER ®

215PLA03 215PLA06 215PLA09 215PLA10 215PLA12

167PSA03 167PSA06

3237686C03M 3237686C06M 3237686C09M 3237686C10M 3237686C12M

-----

167PSA10 167PSA12

Hubbell has a policy of continuous product improvement. We reserve the right to change design and specifications without notice.

L I N E M A N G R A D E T O O L S TM

F r om t h e n ame y o u t r u s t a n d b r a n d y o u d e p e n d o n . . .

TO THOSE WHO CLIMB ™

Contour-Cuff Gloves Bell-Cuff Rubber Gloves &

• ASTM D120 • Colors: Yellow-under-Black, Red-under-Black

• Classes 2, 3 & 4 • Length available: 18” • Featuring our durable on-product label CHANCE ® natural rubber insulating gloves by Hubbell Power Systems. Our ergonomic design provides better flexibility and comfort without compromising safety. Available in three ASTM classes, and a full range of sizes. CHANCE gloves deliver the ultimate protection and comfort To Those Who Climb™. Natural rubber formula provides excellent flexibility and electrical insulation Oval-shaped fingers help provide “No-Dead-Spots” feel and better dexterity Straight fingers relative to palm help prevent fatigue to tendons in back of hands Straight wrist in natural rest poition helps avoid fatiguing forearms and hands

• Classes 1 through 4 • Length 14” through 18” • Sizes: 9, 9 1/2, 10, 10 1/2, 11, 12

For details on CHANCE ® Lineman Grade Gloves™, contact your local Hubbell Power Systems representative or check out Catalog Section 2650 on our web site.

Ergonomic innovation. Timely solutions. Just a few of the reasons the industry turns to Hubbell Power Systems and the Chance brand.

of Historic Line Tools The Guardian

ike Glueckert, Sr. is a Journeyman Lineman/Troubleshooter at Northwestern Energy in Helena, Montana. He is also the guardian of hundreds of antique line tools. Glueckert started collecting line tools when he was a young apprentice, more than 37 years ago. But, he did not get serious until the end of the 1990’s. “The OSHA regulations changed and utilities in the US had to dispose of all their wooden tools. I saw my supervisor cutting the wooden handles in half and I asked if I could take the rest of the tools home with me. He said yes and it became clear to me that I needed to preserve some of our past,” explains Glueckert. What do you have in your collection? Primarily I collect safety line tools, but I have a little bit of everything. I have a lot of line tools including saddles, clamps, and anything to do with transmission work. I have wooden tools and some of the very first, epoxy-glass sticks. I have old wooden insulator cradles and wooden link sticks. I'm not a big insulator collector, but I do have some rubber goods.” Most of my tools are Chance ® tools. Of course, before it was Chance it was Tips Tool Company (1918-1937). Our forefathers, started with Tips. And, some of the most popular tools in the collection are the Tips and Chance shotgun sticks. I have quite a few for transmission work, as well as six-footers and folding sticks. I have a number of different universal sticks with all the tips and a variety of tie heads. M

What is the oldest thing you have in your collection? “I have some very old tool belts. They are homemade out of horse harness leather. I don’t know how old they are for sure, but I suppose they were made at the turn-of-the-century or early in the 1900s. As far as tools go, I have a large variety of Tips tools from the 1920s.” “The basic tools haven’t changed much over the years, but there have been many modifications. Most of the changes were made because the hardware on the lines changed. Over the years, more large heavy tools have been developed for transmission work. These have been incorporated into the trade to accommodate the heavy string of bells, for example. Those are all fairly new tools. And, since the industry is reluctant to take lines out of service, we've been seeing more live line work and more bare hand work and all the tools that you need to do that work. One major change is the addition of electronic components to line tools.” “One of the most unique things is an old Tips Tool grounding chain. It is a braided copper chain the linemen would attach to ground--either the shield wire or a local ground. Then, they would pull the other end of the chain over the conductor with an old manila rope. So, it was just a copper chain lying over the conductor. There aren’t many of those around anymore. What do you think has changed the most over the years? What are some the strangest items that you have?

I also have my own, fully refurbished, 1959 hot stick trailer. It is a Chance trailer, filled with Chance tools.

Also, I have some antique climbing hooks that the lineman wore. In the old days, the shank was

1947-1948

1951-1953

1963

on the outside of the leg, with a very small gaff on the inside. Back then, everyone wore tall boots and it wasn’t uncomfortable to have the support on the outside.” What are your future plans? “I will keep collecting these tools, but they don't belong to me. They belong to everyone. When I retire, I am going to put them someplace where all linemen can see and enjoy them.”

1975-1976

Learnmore about our walk-in tool trailers! Email hpsliterature@hubbell.com and request bulletin number 07-1201.

2012

MISSION-CRITICAL PROTECTION

HPS just concluded its 3-part webinar series detailing how Chance® cutouts provide mission-critical protection. Presented by Charles Worthington, Cutout Product Engineer, the presentation covered the three strengths of the Chance® cutouts: technology, experience, and quality.

TECHNOLOGY • Synthetic fusetube liner delivers consistent arc quenching and longer life • Moisture excluded by sealed hardware via polymer overmounding and blind end fitting bolt holes EXPERIENCE • The OB insulator is the only design to employ time- proven durable, tracking-resistant ESP hydrophobic silicon-alloy rubber • Combined technological excellence from 50+ years of Chance cutouts and 30+ years of Ohio Brass insulators. QUALITY • Exceptional mechanical and electrical performance due to hardware crimping technology and chemical bonding technology at interface to polymer watershed • Withstands 250% of ANSI C29.13 for boiling water/ steep wave tests • For corrosive areas, available with stainless-steel hardware and assist spring

LINER AND SHELL

Liner and shell epoxy-resin matrices form a chemical bond as the shell is wound over the uncured liner. This outperforms the mechanical bond of a fusetube with a bone fiber liner due to its high moisture content — illustrated by comparison photos after a thermal cycling test which simulates aging.

FUSETUBE INTEGRITY

To receive the audio recording from the webinar, contact your territory manager.

TECHNOLOGY | EXPERIENCE | QUALITY CUTOUT

BONE FIBER

SYNTHETIC

Hubbell has a policy of continuous product improvement. We reserve the right to change design and specifications without notice.

Q U A D R A N T D E A D E N D

New Side Load Quadrant Deadend

P A T E N T P E N D I N G

SLQ48N: A Truly Unique Quadrant Clamp

• Side loading conductor groove makes installation much quicker than conventional u-bolt style quadrant clamps.

• Single 1/2” bolt allows for hand or hydraulic tool installations.

• Spring loaded design holds keeper out of the way for easier conductor insertion.

• For use with AAC, AAAC, & ACSR conductors.

CLAMPING RANGE

CATALOG NUMBER

RECOMMENDED TORQUE

WRENCH FLAT

ACSR

ALUM IN. (mm)

SLQ48N #6 (6/1) To 2/0 (6/1) SLQ48S SLQ48C

#4 (7 str) To 2/0 (19 str)

0.19 - .048 (4.8-12.2)

45 LB-FT (61 Nm)

3/4” (19 mm )

For more information, contact your Territory Manager.

Hubbell has a policy of continuous product improvement. We reserve the right to change design and specifications without notice.

www.hubbellpowersystems.com

19-2000 JUNE 2012

Migrating to USCO ® Center BreakV Switches: Problems and Solutions Technical Support Assists with Customer Switch Transition By Juan Gutierrez, Jr., Senior Engineer Arizona Public Service (APS) Yuma, Arizona

For over 25 years, Arizona Public Service (APS) used Cooper Power Systems (formerly KPF) air break switches on our 69-kV overhead transmission lines. The switches are rated for 900- A, which worked well for us, since APS used 795 all-aluminum conductors on our transmission lines with the average amperage of about 850-A.

In 2009, APS began designing lines that could carry more current. The operation/planners began looking for ways to carry more current over our existing lines; therefore, we started reconductoring existing lines with 795 ACSS conductors, which can carry currents as high as 1500-A. Since the Cooper/ KPF air break switch was rated for 900-A, it was no longer an option. APS’ T&D Engineering and Standards (TDES) began looking at higher-rated air break switches and contacted a Hubbell representative for more information on the USCO® Center Break V Switch. This switch could withstand currents as high as 2000-A, but it was a different kind of switch and our APS construction and maintenance crews had reservations.

www.hubbellpowersystems.com

TIPS NEWS & ANNIVERSARY ISSUE

BUMPY TRANSITION As a trial, we bought and installed three of the new USCO switches. Although the construction crew members said they liked the switches, they complained that the switches were not packaged the way they wanted them to be nor were they comfortable with the installation instructions. Further, our old switch configuration included an interrupting bottle that dropped the parallel line charge on the lines for up to 40 miles. Some of our people wanted to continue using the vacuum bottles. Others didn’t want to use the bottles. And some didn’t want the USCO switches at all. Another issue was training. Even though USCO/Hubbell Power Systems offered to train our crews on how to install the Center Break V Switches, our APS crews couldn’t work it into their busy schedule. Despite all this, APS decided to buy and install the USCO Center Break V switches, as our new standard on new and existing 795 ACSS lines. In the beginning of 2010, TDES began receiving reports of USCO switch failures in Yuma, AZ; problems included both vacuum bottle and switch operation failures. APS had purchased and installed 10 USCO switches in the area and, after an investigation, we discovered that each of the 10 switches had been installed in a different manner. It became very clear that the problems were due to lack of proper switch installation training. Pete Swales, Sales Representative for Hubbell Power Systems, and Ron Chamblee, Production Supervisor for Hubbell’s USCO brand were immediately contacted for training assistance. Without delay, Hubbell started working with us to fix the problem. Although Ron was based out of Alabama, he said “If I have to jump on a plane tomorrow, I will.”

Working with TDES, Pete and Ron set up on-site training, in Yuma, to make sure that all USCO switches were properly installed and operated correctly. This training took place in the middle of the Arizona summer, when temperatureswere hitting 110 degrees Fahrenheit, every day. Ron came down twice and spent a week each time with the crews responsible for installing the switches. He even went up in a bucket with groups of crew members to make sure everyone really learned how to properly install the switches. While Ron was here in Arizona, we had the APS training department make an installation training video, which is currently available on our internal APS web site.

TIPS NEWS & ANNIVERSARY ISSUE

Migrating to USCO® Center BreakV Switches

STREAMLINE PURCHASING The support from Hubbell Power Systems didn’t end with on-site training. When we first began purchasing USCO switches, we bought two different models: a vertically stacked configuration and a delta configuration. One came with a 1.5-inch pipe (handle) and the other with a 2-inch pipe. TDES asked if USCO/Hubbell Power Systems could provide APS with only one size pipe for both configurations. Hubbell Power Systems confirmed that the 2-inch pipe would work for both switch configurations. This made standardization, purchasing, and shipping simpler and more efficient and, since then, we haven’t had any issues with receiving our orders. T&D Engineering and Standards has experienced many companies extolling the virtues of their customer service department, but this doesn’t mean they know what they’re talking about. Not once did Pete or Ron unduly praise Hubbell’s customer service department; they didn’t need to pat themselves on the back. They knew what needed to be done and, once it was completed, they started to work on a follow-up plan. Hubbell Power Systems gets an A+ and 100% from me, because of the continued technical and customer support on the USCO Center Break V switch.

TRAINING IS KEY This on-the-job training was warmly received by all the crews and they really appreciated Ron’s knowledge and training skills. Our crews were particularly impressed by the extent to which Ron endorsed the switch, a good indication of a quality product. Ron’s customer service didn’t end with his training. He passed out his business cards to the crews, with an invitation to call him with any questions or problems they might encounter. Several linemen have taken advantage of Ron’s offer, and he was able to resolve their issues over the phone. When the switches were not operating correctly, a lot of the crew members lost their confidence in the switch and no longer wanted them. But, after showing everyone how to properly install the USCO Center Break V switch, the crews don’t want to use anything else. After the training, complaints about the USCO switches dropped from eight or nine per week to zero.

C H A N C E ® A N C H O R S

TRUE-SPEC ANCHORS To assure your trust in CHANCE® Anchors, we authenticate the steel we use in them. Look for our Standard Marks of Anchor Excellence.

COMPLETE MATERIAL TRACEABILITY • Components are permanently stamped with unique numbers. • Assures you the steel meets the specs we demand from our suppliers. PRODUCTS INCLUDED: • PISA ® anchors and rods • Square Shaft lead sections and extensions • No-Wrench anchors

For more details on CHANCE ® Anchors and Anchor Tools, contact your Hubbell Power Systems representative or visit http://www.hubbellpowersystems.com/anchoring/

SPENT FUSE LINKS A used link has a story to tell TiPS of the trade

Finding cutouts open, but no signs of trouble on the line, can be frustrating for line personnel. A link removed from an open cutout and visually examined is sometimes categorized as having “pulled apart.” In reality, the link may be spent because there was a fault and the link reacted to it. By looking for certain characteristics on activated Chance Type T, K, and Slo- Fast links, you can determine when links have operated and at what general current levels. FUSE CONSTRUCTION To analyze the remains of a fuse link, one must first know link construction. Different element materials, strain wires, solder and crimp connections, heater coils and solder junctions are all used in Chance fuse links to control operating speeds. Those performances are shown on published minimum melt and total clear curves (see Table 1 upper right). T LINK CONSTRUCTION T links, 1 through 3 amps have stainless steel elements mechanically crimped at the buttonhead and cable adapter. The 6 through 100 amp links have a similar construction except the stainless steel wire acts mainly as a load-bearing strain member. Current is carried primarily by a parallel pure tin element which is soldered to the exterior of the buttonhead and cable adapters at the crimps.

www.hubbellpowersystems.com

CRIMP BOTH ENDS

pin. The two in parallel are crimped at one end in the buttonhead and at the other in a small copper tube. The fast section has a stainless steel strain wire and parallel copper element, similar to a K link. These two are crimped at one end in the cable adapter and at the other end in a small copper tube. The two crimped copper tubes are joined by a solder connection. GENERAL STRENGTH T, K, and Slo-Fast links are designed to withstand pull forces in excess of 20 lb. This is twice the ANSI requirement of 10 lb. The actual withstand capabilities vary from fuse to fuse. Generally, larger links have greater capability, but type of construction is also a big factor. FUSE OPERATION High level faults, 1,000 amps and up, are easy to recognize. The fuse’s auxiliary tube is nearly gone or totally destroyed, and the element is consumed. When faults are in the 500 to 1,000 amp range, the auxiliary tube will burst but remain intact. In such cases most of the element is consumed depending on the size of the fuse. Unlike high-level fault incidents, lowlevel faults are sometimes hard to accept as having occurred because of the limited damage. In a low-level fault the auxiliary tube is not damaged, and the element may be nearly whole. By knowing the characteristics of a fuse link’s remains after a low-current operation, one can recognize that a fault has occurred. These characteristics vary with the fuse type.

SOLDER BOTH ENDS

CRIMP BOTH ENDS

STRAIN WIRE

COPPER ALLOY ELEMENT

STRAIN WIRE

SILVER COPPER ELEMENT

SOLDER

SMOOTH TIN ELEMENT

COPPER ELEMENT

CRIMP BOTH ENDS

CRIMP

15ampTlink

140ampTlink

Photograph1 15AmpKLink

Photograph2 140AmpKLink

T LINK LOW-LEVEL OPERATION T links, 1 through 100 amps, which have operated at low fault or overload currents, have auxiliary tubes (Photograph 4) that have not ruptured. The tin element will melt somewhere between the soldered connections. This transfers the full current to the stainless steel strain member, which in turn melts in its mid-section. After the interruption, the remaining tin element will have its original smooth surface. The element’s solder connections, and the strain member’s crimped connections will be undisturbed. In Photographs 5, 6 and 7 the auxiliary tubes did not rupture, the tin elements

140 and 200 amp T links have a heavy copper element which is soldered into the buttonhead at the top and mechanically crimped into the cable adapter at the bottom. K LINK CONSTRUCTION The 1 through 3 amp K links are constructed the same as T links. The 6 through 100 amp K links have stainless steel strain wires to provide mechanical strength and copper alloy elements to carry current. These two wires are attached in parallel by crimps at the buttonhead and cable adapter (see Photograph 1). The 140 and 200 amp K links have large silver/copper elements which, unlike T links, are crimped both at the cable adapter and buttonhead (see Photograph 2).

Photograph3

SLO-FAST LINK CONSTRUCTION

Slo-Fast links have two sections (Photograph 3). The slow section has a current-carrying heater coil wrapped around an insulated strain

and stainless steel strain wires melted between connections, the remaining elements have smooth surfaces, and the connections are undisturbed. These are all signs of a normal fuse operation at low current. The 140 and 200 amp T links (see Photograph 8) have a solder connection at the buttonhead end. On low-level faults this connection will melt and pull out of the buttonhead. This type of operation is often mistakenly considered a “pull apart.” As long as buttonhead and element are well wetted with solder, this is a normal operation. T LINK PULL APART T links, 6 through 100 amps, which have been mechanically over stressed and pulled apart, will have a stretched tin element. The surface of the element will be rough and the element will be necked down where it pulled apart. The strain wire will either pull out of one of the crimps, recognized by the bend at that end of the wire, or will break off right at one of the crimps (Photograph 9). T links, 1 through 3 amps, have only stainless steel elements. If they pull apart, they will have elements which pull out or break off like the strain wires. The 140 and 200 amp T links are strong enough that a pull apart (pulling out of the crimp or solder connection) is unlikely. K LINK LOW-LEVEL OPERATION “K” links that have operated at low fault currents (Photograph 10) will have auxiliary tubes that have not ruptured. Like T links, the strain wire and element will melt somewhere between the connections, and the crimps will be undisturbed. The amount of element and strain wire consumed will be somewhat proportional to the ratio of fault current to the fuse rating, i.e., a fault of 15 times the fuse rating will consume more element than one which is only three times the rating.

Photograph4—WholeLAuxiliaryTube

Photograph5—10AmpTLink

Photograph6—40AmpTLink

Photograph7—65AmpTLink

SOLDERMELTED

Photograph8

STRAINWIREBROKEN

STRETCHEDELEMENT

Photograph9

Theselinksweremechanicallypulledapartatforcesabove20lbs.

STRAINWIREPULLEDOUT

ROUGHELEMENTSURFACE

Photograph10—6AmpKLink

(Fusewasoperatedat22amps,15kV)

K LINK PULL APART K links, 6 through 100 amps, which have been mechanically over stressed and pulled apart will have strain wires which pull out of the crimp and/or break off right at the crimp the same as T links. The element, being much stronger than tin, will not neck down much. Once the strain wire gives way, the total stress is placed on the element. The element will break at its weakest point anywhere along its length, not necessarily at the crimp. K links, 1 through 3 amps, have

only stainless steel elements. If they pull apart, they will have elements which pull out or break off like the strain wires shown at right (Photograph 11). The 140 and 200 amp K links are of such strength that a pull apart is unlikely.

SLO-FAST LINKS LOW-LEVEL OPERATION

Slo-Fast links have two sections that can operate at currents of 500 amps and below. The “fast” section is

www.hubbellpowersystems.com

Photograph11

similar to a K link. The fuse operates when the fault current is to the right of the “knee” of the minimum melt curve (see Table II). In this mode of operation the element and strain wire will melt somewhere between the crimps. The crimped sections of the element, and strain wire will be undisturbed. The remains will look similar to the K link in Photograph 10 on page 14. A Slo-Fast link operating in the slow section as shown in Photograph 12 is sometimes mistakenly considered a “pull apart.” At fault or overload currents to the left of the knee of the minimum melt curve, the heater coil transmits enough heat to the solder junction to cause the solder to melt. Separation at this point (provided both crimp tubes are wetted with solder) is a normal operation. SLO-FAST LINKS - PULL APART When Slo-Fast fuse links aremechanically over stressed and pulled apart, they will separate in the lower (fast) section. This section is constructed similar to a K link. As shown in Photograph 13 below, the strain wire pulls out and the element breaks off a little way from the crimped connection. SUMMARY By knowing what to look for, you can spot the characteristics of a normal low-level fault interruption. When the auxiliary tube has not burst, look for the following signs: T links: Element and strain wire melt in mid-section. Strain wire crimps undisturbed. Smooth surface on remaining tin element. K links: Element and strain wire melt between crimps. Crimps undisturbed. Slo-Fast links: Element and strain wire melt between crimps. Crimps undisturbed. Separation at solder junction. Heater coil and strain pin intact.

Theselinkspulledapartatforcesabove20lb.Theelements brokeatthetopcrimpconnection.

TableII

Photograph13—7.0AmpSlo-FastLink

(Thislinkwasmechanicallypulledapartataforceabove20lbs.)

Photograph12

SOLDERMELTED

Hubbell TIPS & NEWS is published to inform personnel of electric utilities and associated companies of new ideas and techniques in transmission and distribution practices. The magazine, under different titles and formats, has been published since 1932. Your suggestions, editorial or photographic contributions are invited and may be submit- ted to Hubbell TIPS & NEWS. TIPS NEWS & ®

HUBBELL TIPS & NEWS 210 N. Allen Street Centralia, MO 65240-1395 USA ADDRESS SERVICE REQUESTED

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UNITED STATES, CANADA & INTERNATIONAL 210 N. Allen • Centralia, MO 65240 Phone: 1-573-682-5521 • Fax: 1-573-682-8714 E-mail: hpsliterature@hps.hubbell.com

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VOL. 16 NO. 3 | SEPTEMBER 2012

w w w . h u b b e l l p o w e r s y s t e m s . c o m

A Look Back at Chance Tips Magazine

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