TRANSMISSION & DISTRIBUTION Centre Insulated Jumper 2 Book 2/15... · 15kV Insulated Jumper...

�T R A I N I N G

M A N U A L0 2 / 0 8 / 0 7

15kVInsulatedJumper

Training Development Centre

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1 51 5 K V I N S U L A T E D

J U M P E R

OBJECTIVE:Given a 15kV insulated jumper, or a loadpickup tool with a 15kV insulatedjumper, you will be able to explainand/or demonstrate the use andmaintenance of insulated jumpers.

WHY?Because of the different components of a15kV insulated jumper, it is important tounderstand their characteristics in order toperform your job safely.

LEARNING OBJECTIVES:1. Describe the components and

characteristics of a 15kV insulatedjumper.

2. Describe the care and storage of a 15kVinsulated jumper.

3. Demonstrate the care and storage of a15kV insulated jumper.

4. Describe the correct installation of a15kV insulated jumper.

5. Demonstrate the correct installation of a15kV insulated jumper.

Preface Start Here

RUB

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TIN

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Copyright © 1999 by the Training and Development Centre, SaskPower. All rights reserved. 0 2 / 0 8 / 0 7

IN THIS MODULE:1. Components

2. Maintenance

3. Installation

RESOURCES:• 15kV insulated jumper

• Applicable rubber gloves

ESTIMATED TIME:1 Hour

PREREQUISITES:• Introduction to Protective Rubber

Equipment module

• Class 1 Rubber Glove Work Rulesmodule

LEARNING STEPS:1. Review the prerequisite modules.

2. Cover this module.

3. Complete the Review Questions andSkills Practice.

4. Clarify any questions you may have.

5. Complete the Knowledge Check.

6. Perform the Skills Check.

Copyright © 1999 by the Training and Development Centre, SaskPower. All rights reserved.0 2 / 0 8 / 0 7

Introduction

15kV insulated jumpers are flexible, insulated cables used to bypass an energized work zone to complete such tasks as splicingconductors or working on risers. Specific types of insulatedjumpers may be used to energize short sections of line.

This module will deal with the following aspects of the insulatedjumper:

• components

• maintenance

• installation

4 T R A I N I N G M A N U A L .

0 2 / 0 8 / 0 7Copyright © 1999 by the Training and Development Centre, SaskPower. All rights reserved.

Components

Insulated jumpers are comprised of two main components — theinsulated cable and the conductor clamp.

Insulated CableThe insulated cable on a 15kV jumper is rated at 8.6kV line toground. The conductor can be #2 to 4/0 flexible copper cable,which is available in various lengths. The jumper cable ampacity isshown in the table below.

Any size and length of insulated cable can be attached to any typeof conductor clamp.

The ampacity of an insulated jumper is limited to thelowest rating of its components, similar to the weakestlink in a chain.

!

Size AWG Stranding Rating Amps#2 copper 259 / #26 strand 2001/0 copper 413 / #24 strand 2602/0 copper 273 / #23 strand 3004/0 copper 437 / #21 strand 400

Insulated cable

Conductor clamp

1 5 K V I N S U L A T E D J U M P E R 5 .

0 2 / 0 8 / 0 7 Copyright © 1999 by the Training and Development Centre, SaskPower. All rights reserved.

Conductor Clamps

Two types of conductor clamps used on insulated jumpers are:

• non-load pickup

• load pickup

Non-load Pickup Clamp

Several design features of a non-load pickup clamp are:

• The handles are made of tough, high impact strengthpolyethylene with a wide hand guard flange.

• All metal parts are copper alloy to improve resistance tooxidation.

• The bearing-type floating washer lower contact improvesgripping action and helps prevent conductor scoring.

Non-load pickupclamp

Load pickup clamp

Non-load pickupclamp



• The overhead conductor range the jumper clamp fits, and therated amperage for the device, may be marked on the head.

There are three different sizes of clamps that can fit a variety ofconductors ranging from:

• #6 copper to 336.4 ACSR.

• #6 copper to 477 ACSR.

• #6 copper to 795 ACSR.

All three clamps can handle up to 400 amps.

The most commonly used clamp is the medium size with a 1/0copper cable 10 feet long.

795 ACSR

477 ACSR

336 ACSR

#6 copper



Load Pickup ClampThe load pickup clamp is designed to energize conductors orapparatus.

There are several different load pickup clamps available. The twomain types are:

• lanyard activated

• handle activated

The distinguishing feature between the two is the mechanism usedto activate the load pickup feature. When load pickup situationsare encountered, a load pickup clamp can be added in place of anon-load pickup clamp on a 15kV insulated jumper. A load pickupclamp cannot be teased closed and is not designed to break load.Both clamps allow the operator to be clear of the flash area duringpickup operations.

Lanyard activatedclamp

Handle activatedclamp



Lanyard Activated Clamp

The design features of a lanyard activated clamp are:

• the housing is constructed of an orange tinted, clear Lexan,allowing for easy visual inspection.

• all current carrying parts are copper or copper alloy.

• contacts are silver plated.

• fits line conductors ranging from #6 copper to 795 ACSR.

• clamp can be used to pickup and carry loads of 250 amps.

The contacts are spring loaded and are closed by pulling aninsulated lanyard.

Clamp is activatedby pulling the

insulated lanyard

Lanyard activatedclamp



The contacts are opened by passing the fiberglass recocking rod(located on the end of the lanyard) through the head of the tool andpushing the plunger to the fully opened position.

Handle Activated Clamp

The design features of a handle activated clamp are:

• the handle is constructed of a yellow tinted Lexan, allowingfor easy visual inspection of the contact.

• all current carrying parts are copper.• contacts are silver plated.• fits line conductors ranging from #6 copper to 795 ACSR.• the clamp can be used to pickup and carry loads of up to 300

amps.

Handle activatedclamp

This operation cannot be done with the tool on theline.!

Clamp is reset bypushing the plunger

with the fiberglassrod



The contacts are spring loaded and are closed by pushing the lowertube upward to the “Stop” position, then turning it to the left toinitiate high speed automatic closing.

Clamp is activatedby pushing the

handle upward andturning to the left



The contacts are reset by pulling the lower tube downward to the“Stop” position, then turning to the right to the “Lock” position.

It is possible to attempt to reset the load pickupmechanism on this type of clamp when it is attachedto the line; however, this should not be done.

STOP

Clamp is reset bypushing the handle

downward andturning to the right



Maintenance

Maintaining an insulated jumper in good condition requires athorough inspection prior to use, and proper care and storage whennot in use.

Inspection

The di-electric integrity of live line tools is critical. It is necessaryto inspect the insulated jumper for the following:

• current test dates

• signs of contamination

• cuts, punctures, or burns along the length of the cable

• check connector surfaces and ferrules by unscrewing theinsulated handle and sliding it down the cable exposing theferrule connector

Connector surfaceand ferrules exposed

for inspection



• check load pickup clamp mechanism

The insulated jumper must be in perfect working condition to dothe work procedure safely.

Care and StorageAll live line equipment should be stored and handled with care.Several points to keep in mind when caring for and storing theinsulated jumper are:

• Clean the insulating surface with warm water and a milddetergent.

• Keep contact surfaces clean. Wire-brush the connectors for agood conductive connection.

• Use a small amount of dry graphite to lubricate the threadsof the screw.

• Coil loosely and store in a cool, dry, dark place, such as acanvas bag.

By maintaining and storing the insulated jumper in this manner, itwill not deteriorate nor will it become damaged before the nextjob.

Do not contaminate the insulation.!



Installation

The installation of insulated jumpers will always be part of apredetermined work procedure or job plan, and will require aminimum of three qualified lineman — two linemen to install thejumper, and one lineman on the ground assisting. Ensure thecurrent and voltage rating of the clamp are suitable for the task. Itwill be necessary to clean the conductor with a wire brush prior toinstalling the insulated jumper. Always keep the jumper clear ofground potential or other phases to reduce voltage stress across theinsulation.

The steps required to install an insulated jumper will vary betweenthe non-load pickup and the load pickup jumpers. This section willonly cover basic installation practices.

Failure to use rubber gloves to install and remove theinsulated jumpers on an alive circuit may causeserious injury or even death.

STOP

15kV insulatedjumper bypassing

work area



Non-load Pickup

The non-load pickup jumper is primarily used to bypass anenergized work area; therefore, either end can be installed first.While the actual work location and job plan will determine theprocedure, the basic steps are as follows:

• Each lineman has control of one end of the jumper.

• One lineman installs his end on the conductor, while theother lineman controls the rest of the jumper.

• With one clamp installed, the first lineman controls thejumper and the other lineman installs the second clamp onthe conductor.

Jumper is energizedwith first clamp

installed

When the first end is installed on the conductor, theinsulated jumper will become energized and must becontrolled carefully.

STOP



With both ends attached, the insulated jumper becomes a bypassaround the work area.

Jumper bypasseswork area

Care must be taken when installing the second clampto ensure it is connected to the same phase. STOP



Load PickupThe load pickup jumper is primarily used to energize a short sectionof line; therefore, the load pickup clamp must be installed last.While the work location and job plan will determine the actualprocedure, the basic steps are as follows:

• Each lineman has control of one end of the jumper.

• Install the non-load pickup clamp on the isolated conductor(conductor to be energized), while the other lineman controlsthe rest of the jumper.

• With the non-load pickup clamp attached, the secondlineman prepares to install the load pickup end.

Ensure the load pickup clamp has been reset, thecontacts are opened, and the clamp is ready to beactivated.

STOP

Non-load pickupclamp installed on

isolated line



• The load pickup clamp is installed on the energizedconductor.

• Prior to activating the load pickup clamp, a final check mustbe made to ensure continuity and clearance of the linemen.

• Activate load pickup clamp.

The clamp is now activated, energizing the short section of line.

These basic steps are not intended to be a workprocedure. They are intended to explain the basicinstallation of an insulated jumper.

!

Lineman clear offlash area during

pickup

When activating the load pickup clamp, the linemenwill remove themselves from the flash area of thepickup clamp.

!

Load pickup clampinstalled on

energized line



SummaryTo summarize this module, you have learned:

• The components and characteristics of a 15kV insulatedjumper.

• The care and storage of a 15kV insulated jumper.

• The correct installation of a 15kV insulated jumper.

Now...

• Complete the Review Questions and Skills Practice.

• Clarify any questions or concerns you may have.

• Complete the Knowledge Check.

• Perform the Skills Check.



REVIEW QUESTIONS

15kV Insulated Jumper

Describe the components and characteristicsof a 15kV insulated jumper.

1. Insulated jumpers are comprised of two main components:_______________ and _______________.

2. A 15kV insulated jumper is rated at _______________ line toground.

3. Fill in the ampacity for each of the insulated cables.

(a) #2 copper ______ amps

(b) 1/0 copper ______ amps

(c) 2/0 copper ______ amps

(d) 4/0 copper ______ amps

T / F 4. A lanyard activated load pickup redhead can pickup and carryloads up to 250A and a handle acitvated load pickup redhead willpickup and carry loads up to 300A.

5. The two types of conductor clamps available are______________ ______________ and ____________________________.

T / F 6. The main feature of the non-load pickup clamp is that it can beinstalled without the use of rubber gloves due to the fact that noload is being picked up.

T / F 7. The non-load pickup clamp is only used to bypass an energizedwork area.

This section is a practice for your module Knowledge Check.Complete the Review Questions, and verify your answers withthe Review Question Solutions located at the end of this module.



8. Two main types of load pickup clamps are the ___________________________ and the ______________ _______________.

9. Match the amperage ratings shown in the left column with thecorrect type of clamp shown in the right column.

T / F 10. Load pickup clamps can also be used to break load as long as theampacity of the tool is not exceeded.

T / F 11. The handle activated pickup clamp is reset by pulling down andturning the handle to the “Lock” position.

12. The ampacity of an insulated jumper is determined by: (You maychoose more than one answer.)

(a) the rating of the cable (the higher the voltage class, the higherthe amperage).

(b) the size of the conductor clamp (the larger the clamp, thehigher the amperage rating).

(c) the lowest current rating of either the clamp or the cable.

Describe the care and storage of a 15kVinsulated jumper.

13. List six items to check before using an insulated jumper.

___ Handle activated

___ Lanyard activated

___ Non-load pickup

(a) 250 amps

(b) 300 amps

(c) 400 amps



T / F 14. Insulated cable is not designed to lay directly on a ground wire.

T / F 15. An oil lubricant should be used to lubricate the threads on theconductor clamp.

Describe the correct installation of a 15kVinsulated jumper.

16. When installing the non-load pickup jumper, the clamps areinstalled:

(a) by three qualified lineman, one to hold each end of the jumperand one to control the middle.

(b) by three qualified lineman — two on the structure installingone clamp at a time while maintaining control of the insulatedjumper, and the third assisting from the ground.

(c) by two qualified lineman who install both clamps at the exactsame time to avoid a load shift.

T / F 17. There is no danger involved when installing the non-load pickupjumper because it is insulated.

18. Match the jumper shown in the left column with the appropriateapplication shown in the right column.

19. Prior to installing the load pickup clamp, ensure the______________ are in the ______________ position.

T / F 20. The location of the lineman is not critical when activating theload pickup clamp.

___ Jumper out a closedswitch

___ Energize two spans ofconductor

___ Jumper out a cutout

(a) Non-load pickup

(b) Load pickup



SKILLS PRACTICE

15kV Insulated Jumper

Demonstrate the care and storage of a 15kVinsulated jumper.

1. Select the appropriate insulated jumper for energizing a short tap.

___ 15kV (load pickup style)

2. Determine the rated ampacity of an insulated jumper.

___ Determine the ampacity of the clamp

___ Determine the ampacity of the cable

___ Overall ampacity of the jumper will be the lower of the two

3. Inspect the insulated jumper.

___ Contamination, cuts, punctures, burns

___ Check connector surfaces and ferrules (unscrew handle)

___ Ensure load pickup clamp is working

Demonstrate the correct installation of a15kV insulated jumper.

4. Install a non-load pickup jumper.

___ Three linemen with climbing gear on

___ Position two linemen up the pole

___ Maintain recommended working clearances

___ Install adequate protective rubber cover

This section is a practice for your module Skills Check. Performeach task, as described, under the direction and observation of acompetent person. They will complete the checklist and giveyou appropriate feedback.



___ Each lineman holds one end of the jumper

___ Lineman #1 installs his clamp, while lineman #2 controls thecable

___ Jumper is kept clear of grounded hardware

___ Lineman #2 prepares to install his clamp (knowing that hisclamp is now energized), while lineman #1 controls the cable

___ Lineman #2 installs his clamp, ensuring it is connected to thesame phase

5. Install load pickup jumper.

___ Three linemen with climbing gear on

___ Position two linemen up the pole

___ Install adequate protective rubber cover

___ Maintain recommended working clearances

___ Each lineman holds one end of the jumper

___ Lineman #1 installs his clamp (the non-load pickup clamp tothe isolated line) while lineman #2 controls the cable

___ Jumper is kept clear of grounded hardware

___ Lineman #2 prepares to install his clamp (ensuring thecontacts of the load pickup are in the open position) on theenergized conductor, while lineman #1 controls the cable

___ Lineman #2 installs his clamp

___ Linemen are clear of the flash area

___ Lineman #2 activates the load pickup clamp




Copyright © 1999 by the Training and Development Centre, SaskPower. All rights reserved. 0 2 / 0 8 / 0 7

1. insulated cableconductor clamps

2. 8.6kV

3. (a) 200(b) 260(c) 300(d) 400

4. True

5. non-load pickupload pickup

6. False

7. True

8. lanyard activatedhandle activated

9. b, a, c

10. False

11. True

12. c

13. • current test dates• voltage rating• amperage rating of

clamps and cables• contamination• cuts, punctures or burns

along the length of thecable

• check connector surfacesand ferrules

14. True

15. False

16. b

17. False

18. a, b, a

19. contactsreset or opened

20. False

REVIEW QUESTION SOLUTIONS

15kV Insulated Jumpers

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