HendrixWhat

Spacer Cable
is Spacer Cable?
Covered Conductor
Withstands temporary branch contact
Eliminates temporary faults
Protects wildlife
Messenger
Less clearance issues
Mechanical Strength
Long Spans
Physical Shield
Compact Configuration Lightning Shield Wire
Multiple Circuits System Neutral
Substation Exits
Long Runs/less voltage drop

Greater Reliability—Less Tree Trimming

 4 Reasons to use Spacer Cable

Lower Project Costs

Lower O&M Costs

Public Relations and “Green”
Initiatives

Hendrix Support Services
Lower Project Costs: Under builds

Bare wire under build Spacer under build

Change out every pole – cost of $3k each
NO pole change outs

Taller poles – cost $200 additional each
NO Transfer costs

Transfer existing – cost of $50k/mile
Savings of $75 - $175k/mile

Transfer communications – cost $10k/mile
 Lower Project Costs: Under builds

Double circuit Bare Wire Transmission Double circuit spacer transmission

under build under build

1 or 2 intermediate poles per span at
NO intermediate poles
cost of $3k each
NO transmission pole change outs

Intermediate poles require additional
NO R/W requirements
R/W requirements – cost ??$
SPACER cable option is $75 -

Some Transmission pole change outs – $100k less per mile than bare wire
cost $10k each
 Lower Project Costs: Back up feed
to Hospital

URD – directional
boring, Road crossings,
urban obstacles – cost
$2MM

Bare Wire: Not an
option, narrow route
through heavily
treed/park areas.

Spacer: Savings $1.5MM
Lower Project Costs: Substation Exits

Bare wire exit Spacer Cable Exit

Separate pole line for each
3 circuits on one pole line
circuit

1 acre additional real estate
No dip poles

Reliability risk at feeders
Less real estate

Dip poles in sub for clearance
Reliable feeders
issues

Cost Savings = $75 - $150k
 Lower Project Costs: Additional Sub exit

Bare wire cost estimate $300k (converting to triple circuit)

Spacer Cable Under build: Project came in at < 30% of original
budget
 Lower Project Costs: Improving Reliability

Worst performing circuit even after
Option 3: Spacer Cable

converting to “tree”’ wire.
 NO tree trimming

Option 1 – URD – cost $2MM –
 Good Public relations
heavy tree casualties
 Total cost < $500k

Option 2 – tree trimming - $600k –
 Now – best performing circuit
short term fix with public resistance
 Lower Project Costs: Improving Reliability
Poor performing
circuit along
busy, narrow
road with little
R/W space

Option 1 – URD
 Cost $1MM

Option 2 –
Spacer Cable,
Significant
improvement in
reliability
 Cost $300k
Lower Project Costs: Power Plant

12
circuits

Cost
$2MM

URD
option
$7MM
Lower Project Costs: Power plant exits in urban setting

Bare Wire not feasible

Triple circuit through alleyway
Savings over URD option = several million $$
Lower Project Costs: 4kV conversion to 15kV

Bare wire presented NESC

clearance issues

URD estimate = $4MM

Spacer = $300k total
 Converted in 4 weekends
Lower Project Costs: lake crossing

Option 1
submarine cable
cost $1MM

Option 2 – build
around shoreline
cost $800k

Option 3 - Spacer
cable 1,600’ span
cost $75k
Lower Project Costs
The cost of covering the cable can be easily
offset with real world concerns such as
ROW acquisition concerns, project approval
costs, reduced need for poles, less clearance
issues, and more direct routes.
Lower O&M
Costs
 Lower O&M Costs: Reduced Outages

Temporary
Tree contact
does not
cause outages

System
strength keeps
the circuit
operating

Wildlife will
not “short
out” the
system
Lower O&M Costs: reduced outages
18
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14
12
10
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6 Open Wire
4 Spacer Cable
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Spacer Cable reduces non equipment related outages by 75%

 Lower O&M Costs: Less Tree Trimming

Conventional Bare Wire Hendrix Spacer Cable

Compact construction, placement flexibility, and the ability to withstand

temporary ground contact reduces the amount of branches that must be
trimmed and extends trim cycles. Savings = 50%-80%
 Lower Operating Costs: Voltage Drop Problem

Long run – start up
voltage problem with
large electric motor

Option 1- re
conductor with
954kcmil bare wire –
 Voltage
fluctuation =
6.97%
 Minimum
Voltage = 112.7

Option 2 – spacer
 Voltage
fluctuation =
4.79%
 Minimum
voltage = 116.9
Lower O&M costs: Reduced Voltage Drop
The close spacing of the
phase conductors results in
lower total line impedance
and reduced voltage drop
Lower O&M Costs: $/mile
Total Worst 20%
System of the circuits

Tree Trimming $600 $2400

Outages $750 $3000

Voltage drop (20% $430 $430

load)
Reliability penalties $? $?

Total Annual Savings $1780 $5830

 Public Relations and “Green”
Initiatives
Less vegetation removal
Reduced Tree trimming
Less outages
Improved Aesthetics

Improved power quality

Wildlife protection
Avoiding sensitive areas
Lower Carbon Footprint
Recyclable material
 Public Relations: Power Quality
Cable
covering
protects
circuit
from
momentary
outages
Green Initiatives: Avoiding sensitive
areas
The ability to span long
distances makes it easy to
cross freeways, lakes,
marshes, gorges, etc

Poles can be
placed to
minimize
disruption to the
environment
Green Initiatives:
Protecting raptors and wildlife
Cable covering
eliminates areas
where animals can
be electrocuted
between phases or
phase and ground
Green Initiatives:
Reducing your right of
way clearance by 20 feet
for one mile can result in
up to 6.5 tons of carbon
dioxide being removed
from the atmosphere every
year
All Hendrix polymer
components are made of
100% No.2 HDPE
Recyclable Plastic
Hendrix Support Services
 Hendrix Support Services
Hendrix will kit cable and
accessories for shipment to
the jobsite.
•Cut to length cable saves
installation time and
reduces scrap, saving 10%
or more on project costs. Spacer Cable Accessory
•Inventory and stock is maintained at
warehousing costs can be Hendrix
eliminated, saving up to
17% of the cost of the Spacer Cable installation
material. equipment is available
for rental or sale—free
to first time users
 Hendrix Support Services
Design Support: Hendrix will work
with your Engineers to help design
your Spacer Cable System-free.
Conductor sizing, pole loading,
layout, sag and tension, guying,
protection, BOM, cost estimates,
and installation equipment needs.
Training and Advisory Services. We
will work with your planners,
designers, line crews or contractors-
on line, in the classroom, or in the
field. First time users are provided
with on site installation advisory
services free of charge.
Hendrix Support Services
Application Flyers: Helps determine where Spacer Cable can add
the most value on your system
Product Catalog: Details on each component
Design Guide: Technical information for the System Design
Engineer
Installation Guides and Video: Step by step instructions
on how to install a Spacer Cable System
Construction Drawings: Standard pole top drawings with
layout dimensions and bill of material-for putting directly
into your standards.
Hendrix Support Services
Design-Build – full turnkey capabilities

Site evaluation

System design

Construction
Management

Quality Assurance

Project
Management
Take advantage of Hendrix 50+ years of Spacer
Cable design, application, and installation knowledge
 HendrixWhat
Spacer Cable
is Spacer Cable?
Covered Conductor
Withstands temporary branch contact
Eliminates temporary faults
Protects wildlife
Messenger
Less clearance issues
Mechanical Strength
Long Spans
Physical Shield
Compact Configuration Lightning Shield Wire
Multiple Circuits System Neutral
Substation Exits
Long Runs/less voltage drop

Greater Reliability—Less Tree Trimming

Support documentation

Voltage drop: See Brian Trager for calculations of voltage drop savings. He used
used the
conductor size in the chart and assumed a 20% load—
load—note that the calculation is based on amperage
so savings will go up with the square of the current.

Tree Trimming: Assumes $1200/mile and a 50% savings

Outages: Assumes a $2000 cost per outage (office, truck and crew prep,
travel, on site, etc). Assumes 0.5 outages per mile per year and a 75%
reduction in outages