DEVELOPMENT OF NEW TOOLS - · PDF filePaper #76 DEVELOPMENT OF NEW TOOLS seguridad eléctrica Especifications Maximum operating voltage 36 kV. FRP foam filled tube, according to IEC-60855,

PAPER #76

DEVELOPMENT OF NEW TOOLSFor live line working

Temporary Conductor Support for rigid insulator.

Temporary Conductor Support for suspensions.

Double insulated jumper hanger.

seguridad eléctrica

Co Authors: Ing. Julio Callejo.

Independent LLV Consultor & Trainner

J.M.Gutierrez 1441

Paraná, Entre Rios, Argentina

[email protected]

Author: Ing. Mariano Terzi

CEO, TYRCO S.A.

Diego Palma 3340 of 309, (1621)

Benavidez, Buenos Aires, Argentina

[email protected] / www.tyrco.com.ar

DEVELOPMENT OF NEW TOOLS

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mailto:[email protected]

http://www.tyrco.com.ar/

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PURPOSE

USER

MANUFACTURER

Improve and simplify the work

Increasing the safety

Reducing costs & time.

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USER - ENERSAThe company ENERSA, is a leading utility company in the Argentinean electrical market• 350.000 customers • 56.300 km2 • 1200 Km of High Voltage Lines (132 kV.)• 14.000 km of medium Voltage Lines (33 kV./13,2 kV.)• 9.000 km of low Voltage Lines (380 V./220 V.)• 20 High Voltage substations, 945 MVA • 84 Medium Voltage substations, 254 MVA • 12.000 Low Voltage substations, 927 MVA

Argentinean company, with over 25 years experience in the electrical marketThe company is dedicated to the manufacturing and selling a wide range of products for low, medium and high voltage, Product line:

• Hot sticks.• Temporary grounding equipment.• Voltage detectors, Instruments.• Live line working tools.• Custom design tools.

MANUFACTURER – TYRCO SA.


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We intend to show the development of new live line working tools, that we were forced to develop, when moving on live line working (LLW) from 13.2 kV. to 33 kV. systems.Some problems and security issues where found when moving to a higher voltage level, such as:

• The equipment available in the company was for distribution systems of 13.2 kV instead of 33 kV., exceptfor the insulated trucks,

• Increase of the safety level. Some crews were using tools originally designed for 13.2 kV., on 33 kVsystems,

• Customs tools, some crew developed his own custom tools.

• The economic factor, the company didn´t have enough budget for the acquisition of new tools.

• Aerial insulated bucket trucks, available in the company, didn´t have the auxiliary arm.

1. Temporary Conductor Support for Pin type insulators.

2. Temporary Conductor Support for suspensions.

3. Double insulated jumper hanger

Three tools were developed with the assistance and engineering of TYRCO

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Problems The conductors cannot be hold to make the change of the insulators, because the insulated trucks did not have any auxiliary arm “plumin” that would allow them to the support the conductors while working.

Auxiliaryarm

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Designs considerations

1. The insulation level, 33 kV.

2. Type of cross arms, solid/hollow,

concrete or Wood.

3. Dimension of the numerous cross-arms

that should be adapted to, different sizes

and cross section sizes.

4. Mechanical forces involved.

Final ToolCustom tool

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Specifications

For cross-arms up to200 x 150 mm.

Maximum working load550 kg.

Maximum operating voltage36 kV.

Trapezoidal thread with pivoting head to fit any angle of cross-arm

(trapezoidal or straight)

FRP foam filled tube, according to IEC-60855.

Diameter: 64 mm.

Cable clampMax. Cable diameter: 25 mm.

Material: Aluminum Alloy and BronzeWith safety lock to avoid losing the

conductor


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Problems The conductors cannot be hold to make the change of the insulators, because the insulated trucks did not have any auxiliary arm “plumin” that would allow them to the support the conductors while working.

Auxiliaryarm

2. Temporary Conductor Support for suspensions

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2. Type of cross arms.

3. Dimension of the numerous cross-

arms that should be adapted to,

different sizes and cross section

sizes.


Custom tool Final Tool

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Especifications


FRP foam filled tube, according to IEC-60855,

Diameter: 64 mm.Length: 1,50 m.


Maximum working load 550 kgm. / 700 kg. in each sideFor cross-arms up to

240 x 200 mm.

Pole clamp Diameter: 64 mm.

Material: Aluminum alloy, Allows rotation and

movement to fit any angle

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Problems & considerationsThis tool was developed based on the standard insulator hanger When using the hanger, the linesman asks for the possibility to add another clamp at the end to hold the conductors or jumper cables giving the tool a wide range of application, adding safety and simplifying the tasks.

3. Double Insulated Jumper Hanger

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2. Possibility to hold jumper cable.


Original Tool Final Tool


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Especifications


FRP foam filled tube, according to IEC-60855, tested at 100 kV. / 300

mm.Diameter: 39 mm.Maximum bending moment: 150 kgm

Cable clampMax. Cable diameter: 30 mm.

Material: Aluminum


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The purpose of this paper was to demonstrate how working together the users and the manufacturer, it

is possible to:

✓ Improve and simplify the work,

✓ Increasing safety

✓ Reducing time.

Usually we see in the crews some homemade tools that are useful at work but as a recommendation for

users who develop their own tools, we suggest always to consult with a manufacturer, who is the most

suitable to design and build this type of tools.

ACKNOWLEDGMENT

We wish to thank to the working group of LLW of ENERSA, Javier Berasategui, Hugo Alasino,

Ambrosio Urrutia and Luis Garmendia, and the engineers from TYRCO S.A., that without their support

the development of these tools would not have been possible.

Conclusion

THANK YOU

Visit our web site

www.tyrco.com.ar

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DEVELOPMENT OF NEW TOOLS - · PDF filePaper #76 DEVELOPMENT OF NEW TOOLS seguridad eléctrica Especifications Maximum operating voltage 36 kV. FRP foam filled tube, according to IEC-60855,