MACLEAN
Transmission Post Insulators
POWER
SYSTEMS
Rev: A3, Date: 8/2006
MPS offers 2 distinctive silicone line post insulator designs to comply with all the requirements of the market
place. Standard designs, from 69kV to 230kV, are supplied using an injection molding process. These post
products are manufactured to forecast in high volumes with standard lengths & leakages. Custom designs
and ratings 230kV & above are produced using the extruded rod shed process, where the posts are produced
to customer order, per customer specification (custom strength, length, & leakage).
Injection Molded Line Posts
The insulator silicone housing is injection molded, using high temperature and high pressure injection, onto the
FRP rod. The end fittings are crimped onto the molded sub-assembly using the MPS “P-S-T” triple seal to
prevent moisture ingress to the core. The standard leakage distances offered on these products provide were
designed for use in high contamination environments. These heavy contamination designs provide between
25mm/kv to 31mm/kV leakage.
Features
Injection Molded Products
¾ 30XH Class – Standard Strength Posts
• Standard Designs / Lengths
• Standard Leakages [25mm/kV]
• Produced to Forecast
2.5” Rod [NPK, NBK, NBS Series]
¾ 40XV Class – High Strength Posts
3.5” Rod [NBS Series]
Extruded Design Line Posts
The “Extruded” design line post insulator offers the unique ability to custom design for any application, with
the flexibility to produce custom section lengths and leakage distances. Insulator section lengths can be
customized to customer requirements in 1 inch increments. Variable shed count and spacing is used to
provide custom leakage distances, or leakage in accordance to the IEC815 Recommendation for Polluted
Areas.
[Pollution Class: Low = 16mm/kV, Medium = 20mm/kV, Heavy = 25mm/kV, Very Heavy = 31mm/kV]
Features
•
•
•
•
Custom Designs (Variable Lengths & Leakage)
Custom Leakage Distances (per IEC815)
Produced to Order
Extruded “Seamless” silicone sheath
Extruded Products
¾ H1 Class – Low Strength Posts
2.0” Rod [H1C1, H1C2, H191 Series]
¾ H2 Class – Standard Strength Posts
2.5” Rod [H291 Series]
¾ H3 Class – High Strength Posts
3.0” Rod [H391 Series]
Silicone Rubber – MPS uses a Silicone formulation that has been unchanged since the early ‘80’s.
The Si-O molecular bonds (inorganic backbone of silicone) are very stable and have bond strengths higher
than sunlight, making the silicone resistant to UV degradation. In addition to providing protection against
ultraviolet radiation, electrical aging, and corona effect, silicone exhibits hydrophobic properties; which provide
excellent recovery characteristics to control leakage currents in highly polluted or coastal environments.
Line Post Insulators – Page LP-1 of LP-15
USA - Tel: 847-455-0014 Fax: 847-451-0029 y Canada - Tel: 450-698-0520 Fax: 450-692-5670 y www.macleanpower.com
Product specifications are subject to continuous improvement and may be changed at any time without notification.
MACLEAN
Transmission Post Insulators
POWER
SYSTEMS
Rev: A3, Date: 8/2006
Catalog No. Definition – “Injection Molded” Design
N
P
K
G
ANSI
Class
Base
Line End
Fitting
Base
Attachment
P = Fixed
B = Bendable
K = Trunnion
S = Drop
Tongue
V = Vertical
Trunnion
30 XH 028 S
Rod
Size
Shed
Profile
Number
of Sheds
G= Gain
30 = 2.5”
XH = Series 30
F = Flat
40 = 3.5”
XV = Series 40
N P K G 30 XH 0 2 8 S 0
Injection Catalog
Number Example
No Corana Ring
Silicone Rubber
28 Sheds
Material
Choice
S = Silicone
0
Corona Ring
Requirement
0 = No Ring
1 = One Ring
To order a 28 shed, 2.5”
diameter rod, Trunnion/Fixed
Gain Line Post Insulator, the
Catalog number would be
NPKG30XH028S0
Series 30 Insulator
2.5" Rod Diameter
Gain Base
Clamp Top
Fixed Base
ANSI Class
Typical End Fittings
B
P
S
K
V
Bendable
Base
Fixed Base
Drop Tongue
[Slotted Blade]
Horizontal Trunnion
[Clamp Top]
Vertical Trunnion
Line Post Insulators – Page LP-2 of LP-15
USA - Tel: 847-455-0014 Fax: 847-451-0029 y Canada - Tel: 450-698-0520 Fax: 450-692-5670 y www.macleanpower.com
Product specifications are subject to continuous improvement and may be changed at any time without notification.
MACLEAN
Transmission Post Insulators
POWER
SYSTEMS
Rev: A3, Date: 8/2006
Catalog No. Definition- Reliable “Extruded” Design
H 2 9 1 0 4 0
BASE
INSULATOR
TYPE
V
A
00
VARIABLE
LEAKAGE
CORONA
RINGS
MPS
INTERNAL
USE
LINE
END FITTING
TYPE
SECTION LENGTH
(Inches)
Post Orientation
Base Type
Line End Fitting
H - Horizontal
V - Vertical
1 – 2pc Flat (Steel)
3 – 3” Bolt Circle
4 – 3” Stud Base
5 – 5” Bolt Circle
8 – No Base
(Anchor only)
9 – 2pc Bendable
Gain
C – 2pc Fixed Gain
X - none
1 – Drop Tongue
2 – Horizontal Trunnion
3 – 3” Bolt Circle
5 – 5” Bolt Circle
6 – Vertical Trunnion
7 – F-Neck
C – Extended Drop Tongue
D – Double Trunnion
X - None
Rod Diameter
1 – 2.0”
2 – 2.5”
3 – 3.0”
4 – 1.75”
H2 9 1 0 4 0 V A 0 0
Reliable Catalog
Number Example
MPS Identification
6" Corona Ring on the Line End
Variable Leakage
40" Insulator Section Length
Tower
A - None
B - None
X - None
Line
6”
12”
None
To order a 40”, 2.5” diameter
rod, Drop Tongue/Bendable
Gain Line Post Insulator with a
6” Corona Ring, the Catalog
number would be
H291040VA00
2 Hole Drop Tongue
2 pc Gain
2.5" Rod Diameter
Horizontal Post
Typical End Fittings
8-
5-
-1
-2
-C
Anchor
5” Bolt Circle
Drop Tongue
Horizontal Trunnion
Extended Drop
Tongue
Line Post Insulators – Page LP-3 of LP-15
USA - Tel: 847-455-0014 Fax: 847-451-0029 y Canada - Tel: 450-698-0520 Fax: 450-692-5670 y www.macleanpower.com
Product specifications are subject to continuous improvement and may be changed at any time without notification.
MACLEAN
POWER
SYSTEMS
Transmission Post Insulators
Rev: A3, Date: 8/2006
Line Post Base Options (Typical Applications)
H1 / H2 / NB_G30XH - Bendable Gain Base (Steel)
H3 (*NB_G40XV) Bendable Gain Base (Steel)
H1 / H2 / NB_F30XH - Bendable Flat Base (Steel)
H3 (**NB_F40XV) Bendable Flat Base (Steel)
* NB_G40XV Bendable Gain Base = 12” & 14” Hole Spacing
** NB_F40XV Bendable Flat Base = 10” x 15” Hole Pattern
*** Additional bendable base designs / mounting patterns available, contact MPS for details ***
Bendable Base / Anchor
H1 & H2 Fixed Gain Base (Cast Ductile Iron)
Bendable Base – Formed steel base that mates with an anchor end fitting of the insulator via 2 mounting bolts. Bendable
bases come in gain and flat designs, with 0° & 12° upsweep angles, as required.
Fixed Base – Cast iron base that mates with a 5” bolt circle end fitting of the insulator (4 bolts). Where the bendable
designs allow for some articulation of the insulator, the fixed base does not. The fixed design comes in gain and flat
designs, with a standard 12° upsweep angle.
Gain Base – base design used to mate the insulator to a round pole surface. This base is attached to the pole through the
center bolt mount holes.
Flat Base – base design used to mate the insulator to a flat surface, using either the 4 bolt holes along the ears of the
base, or the 2 center mount bolt holes.
Line Post Insulators – Page LP-4 of LP-15
USA - Tel: 847-455-0014 Fax: 847-451-0029 y Canada - Tel: 450-698-0520 Fax: 450-692-5670 y www.macleanpower.com
Product specifications are subject to continuous improvement and may be changed at any time without notification.
MACLEAN
Transmission Post Insulators
POWER
SYSTEMS
Rev: A3, Date: 8/2006
Corona Rings for Line Post Insulators
High voltages can result in unwanted noise (RIV) and
corona. To minimize the effects of corona, corona rings
are applied to one or both ends of the insulator (attached
onto the end fittings). Typically, for system voltages
230kV and above a corona ring or combination of rings
is necessary. However, some applications may require
rings at lower system voltages. Refer to the Corona
Ring section of the Application Guide for detailed
information or contact the factory.
Recommended Corona Ring Application
Class
End Fitting
138kV
161kV
230kV
345kV
400kV
H1 & H2
Line End
None
None
6"
12"
12"
30XH
Tower End
None
None
None
None
12"
H3
Line End
None
None
None
12"
12"
40XV
Tower End
None
None
None
None
12"
For Insulators 230kV and above, MPS recommends use of Corona Rings. The Application
Table above depicts typical corona ring usage on MPS suspension Insulators. For corona ring
usage on special applications, environments, and elevations; please contact MPS.
Trunnion Clamps
ACTS Series / FCTS Series / HC Universal Clamp
For clamp catalog numbers and details see ACTS, FCTS, and HC (Universal) series trunnion
clamps in the “Connector & Clamps” section of this catalog.
Clamps and Insulators can be ordered as assemblies, for details, contact your local MPS
Sales Representative.
Line Post Insulators – Page LP-5 of LP-15
USA - Tel: 847-455-0014 Fax: 847-451-0029 y Canada - Tel: 450-698-0520 Fax: 450-692-5670 y www.macleanpower.com
Product specifications are subject to continuous improvement and may be changed at any time without notification.