|
 INTRODUCTION
The
Kerite Company's reputation for manufacturing the highest quality
electrical cables is based on testing in the toughest set of environmental
conditions that exist - the real world. While others point to unproven
short-term tests, at Kerite we draw upon a century of experience
in formulating, compounding, manufacturing, and evaluating rubber
insulated power cables. The successful track record of our field-proven
insulation establishes a unique benchmark for ongoing research and
development activities.
Kerite power
cables (5kV thru 138kV) utilize Permashield® as a stress control
layer over the conductor. Permashield's nonconducting properties
allow for 100% electrical inspection during the extrusion process.
This assures that there are no voids or breaks which can result
in premature cable failure. This layer also reduces the level of
electrical stress throughout the insulation system and limits charge
injection into the primary insulation.
Kerite power
cables utilize a specially formulated ethylene propylene rubber
(EP) insulation. Drawing upon our extensive experience in formulating
insulations, Kerite achieves those electrical, mechanical, thermal
and chemical properties most relevant to long-term field performance.
Millions of feet of Kerite insulated cables have been installed
in all types of environments with no known failures due to insulation
degradation or weakness. This record is unsurpassed in the cable
industry. Unique features and benefits which make Kerite superior
to other commercially available cable insulations include corona
immunity; long-term, over-voltage endurance; long-term moisture
resistance; and impulse withstand.
Kerite also
has a rigid quality assurance program that, because we formulate
and compound our own insulations, allows us the opportunity to inspect
all incoming raw materials to ensure compliance with exacting Kerite
standards. In addition, a sample of every batch of Kerite insulation
is tested and evaluated before it is extruded. Final testing of
all finished cables is performed on the actual shipping reels.
Another unique
feature of Kerite Power Cable is our easily removable insulation
shield. Our semiconducting shield can be removed without the use
of heat or special tools. This speeds installations, while greatly
reducing the potential for failures caused by cut-throughs and insulation
tearing during removal, a common problem with other types of cables.
Conductors
Kerite power cables can be furnished
with either copper or aluminum conductors. For most applications,
the selection of conductor material is one of economics. As the conductor
size increases, the difference in initial cost increasingly favors
aluminum. However, because aluminum has a lower conductivity than
copper, an aluminum cable of equal ampacity will be larger. This may
require larger ducts, conduits, ladder racks or trays, thus offsetting
the savings resulting from aluminum conductors. For direct burial
or aerial cables preassembled or spun in the field, the additional
size would probably be of little consequence.
Metallic Shield
The standard shielding system for power cables consists of a 5 mil
helically wrapped bare copper tape. At Kerite, this tape is applied
with a 20% overlap. Copper tape may be supplemented with concentric
neutral wires when additional fault current carrying capabilities
are required. Cupro Nickel tape is used for nonjacketed aerial cable
applications. Where ultimate resistance to environmental conditions
is required, cables can be furnished with an extruded lead sheath
and optional jacket. Another shield option is longitudinally applied
corrugated copper tape.
Cable Jacket
Overall jackets fall into one of two basic categories: Thermoplastic
or thermoset. The most widely used thermoplastic jacket, Polyvinyl
Chloride (PVC), offers mechanical protection, flame retardancy, oil
resistance and low cost. In underground duct applications Polyethylene
(PE) may be used. It offers increased resistance to moisture and mechanical
damage but is not flame retardant and can not be used on cables with
UL MV 105 listing.
Thermosetting
jackets offer a wide range of capabilities including, flame retardancy,
mechanical toughness, and flexibility, but at a higher cost than
most thermoplastic jackets. Available thermosetting jacket options
include; Kerite FR - Chlorosulfonated Polyethylene (CSPE) with a
long history of utilization in heavy-duty applications such as power
plants and process industries. Kerite Low Smoke Zero Halogen jacket
(LSZH) for use where there is heightened concern for personnel and
equipment in case the cable becomes involved in fire.
Mechanical
Protection
Aluminum or galvanized steel armor wires, interlocked armor or continuous
corrugated weld armor can be provided for mechanical protection.
Submarine Finishes
For submarine cable applications, aluminum or galvanized steel armor
wires can be provided in single or double layers. These wires can
be supplied with individual jackets. A bedding layer and flooding
compound can be added to maximize the protection.
Temperature
Rating
The maximum continuous operating conductor temperature for a Kerite
insulated power cable is 90°C or 105°C in normal operation,
with the emergency operating conductor temperature limit of 130°C
or 140°C (See the catalog pages for the specific catalog number).
The safe short circuit conductor temperature is 250°C.
Typical Single
Permashield (SPS) Cable Design
For over a century, Kerite power cables have withstood the toughest
test of all - the test of time - setting the standard by which cable
is judged, through actual field experience not just accelerated
laboratory testing. Introduced over 35 years ago, our exclusive
Permashield®
and EP Insulation System achieves the highest level of dependability
and the lowest total cost of ownership.
Unequaled quality
is reflected in every foot of Kerite cable. It is this commitment
to superior performance that has established Kerite as the best
cable value - for today, tomorrow and beyond.
OPTIONS
Conductor
- Copper
-Solid
-Stranded
- Aluminum
-Solid
-Stranded
-Filled
|
Permashield®
Insulation System
- 5kV
- 138kv Single Permashield (SPS)
|
Metallic
Shield
- Copper
Tape
-Bare
-Tinned
- Zinc
Tape
- Cupro
Nickel
- Lead
- Copper
Tape plus Concentric Neutrals
- Wire
Braid
- Longitudinal
Corrogated Copper Tape
|
Overall
Jacket
- Thermoplastic
-Insulating or Semi-Conducting
-Polyvinyl Chloride (PVC)
- Polyethylene (PE)
-Polyurethane (TF)
-Polypropylene (PP)
-Thermoplastic Elastomer (TPE)
-Low Smoke Zero Halogen (TSLS)
- Thermosetting
-Kerite FR (CSPE)
-Low Smoke Zero Halogen (TSLS)
|
OPTIONS
Conductor
- Copper
-Solid
-Stranded
-Stranded, Filled
- Aluminum
-Solid
-Stranded
-Stranded, Filled
|
Insulation
|
Copper
Concentric Neutral Wires
- Bare
or Tinned
- Round
or Flat
- Full,
One-Third or Special
|
Overall
Jacket
- Insulating
or Semi-Conducting
- Marker
Stripes
- Sequential
Footage
- Phase
Identification
- NESC
Direct Buried Idenitfier
- Polyethylene
(PE)
- Polypropylene
(PP)
- Chlorinated
Polyethylene (CPE)
|
Catalog Number
Matrix
Prefix
| No.
of Condrs |
Conductor
Size |
Conductor
Material |
Voltage |
| A |
BC |
D |
EF |
1 = 1/C
2 = 2/C
3 = 3/C
4 = 4/C
5 = 5/C
6 = 6/C
7 = 7/C |
14 = 14 AWG
12 = 12 AWG
10 = 10 AWG
08 = 8 AWG
06 = 6 AWG
04 = 4 AWG
02 = 2 AWG
01 = 1 AWG
11 = 1/0 AWG
21 = 2/0 AWG
31 = 3/0 AWG
41 = 4/0 AWG
25 = 250 kcmil
35 = 350 kcmil
50 = 500 kcmil
75 = 750 kcmil
90 = 1000 kcmil
95 = 1500 kcmil
97 = 1750 kcmil
99 = 2000 kcmil
|
A
= Alum
C = Copper
F = Filled Alum
G = Filled Copper
H = Compact Filled Alum
S = Solid Alum
T = Solid Copper
X = Compact Copper
Y = Compact Filled Copper
Z = Compact Alum |
00
= 600V
02 = 2kV
05
= 5kV
08 = 8kV
15 = 15kV
25 = 25kV
35 = 35kV
46 = 46kV
69 = 69kV
95 = 115kV
98 = 138kV
PR = Precipitator
|
Suffix
| Insulation
Level |
Shielding |
Individual
Jacket |
Assembly |
Outer
Assembly Finish |
| G |
H |
I |
J |
K |
0
= No PS
1 = 90°C SPS 100%
3 = 90°C SPS 133%
9 = 90°C SPS 100% System
A = 105°C SPS 100%
C = 105°C SPS 133%
I = 105°C SPS 100% System |
0
= Nonshielded
1 = Full Bare Conc
2 = All other Bare Conc
3 = 1/3 Bare Conc
4 = Cu Tape
5 = Wire Braid
6 = Cupro Tape
7 = Lead
8 = Armor Wires
9 = All Others
A = 1/3 Tinned Conc
B = Full Tinned Conc
C = All Other Tinned Conc
D = Tinned Cu Tape
E = Bare Cu Tape & Conc
F = Tinned CU Tape & Conc
G = Zinc Tape
H = Bare Flat Straps
J = Tinned Flat Straps
K = 10 mil BCT
L = 10 mil TCT
|
0
= None
1 = Black LLDPE
2 = Black PE & Red Stripes
4 = PVC
5 = Black PVC & Red Stripes
6 = FR (CSPE)
7 = Semicon PE
8 = Semicon PE & Red Stripes
9 = All Others
B = TF Jacket Polyurethane
E = Polypro
F= TPR
G = TSLS Thermoset Low Smoke
H = TPLS Thermoplastic Low Smoke
J = CPE Thermoplastic Clorinated PE
|
0
= None
1 = Parallel
2 = Twist
3 = Twist with Neutrals
4 = Cabled
5 = Cabled with Neutrals
6 = Parallel W/Neutrals
7 = All others
9 = Twist with Messenger |
0
= None
1 = Black PE
2 = PVC
3 = FR
4 = Galv ST Int Arm
5 = Galv ST Int Arm, PVC
6 = Galv ST Armor Wires
7 = Galv St Armor Wires, Sub Finish
8 = Galv ST Armor Wires, Individual PE Jackets
9 = All Other
A = Al Int Arm
B = Al Int Arm, PVC
C = Cable in Conduit
G = Galv St Arm Wires, Overall PE |
Quality System ISO 9001-2000 Registered
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