Braced Post Insulators
Braced Post: Unique insulator design that combines the cantilever
properties of a horizontal line post with the tension strength of a
suspension insulator to make a high strength insulator assembly.
The suspension insulator, or brace, is attached to the line post and
to the tower via connection hardware. When loaded, the brace
goes into tension, and is the primary support mechanism for the
assembly. The line post provides stability for transverse (tension
& compression) & longitudinal loads exerted onto the assembly.
Connection Hardware: The hardware used to connect the
brace to the post and tower can be supplied in a variety of
combinations. Typically, the hardware used is greater than or equal
to the SML rating of the brace insulator, and the type of connections
is determined by the end fittings supplied on the suspension.
Options for connection hardware discussed in later sections.
Vertical Load: (MDCL) Downward load applied to the assembly,
usually determined by the weight of the conductor.
Tension Load: Transverse load pulling perpendicularly away from
the tower, essentially putting the line post in tension.
Compression Load: Transverse load pulling perpendicularly
into the tower, compressing the line post towards the tower.
Longitudinal Load: Side load applied to the assembly. Ideally, the
load on each side of the assembly will be equal / balanced, resulting
in no longitudinal load. Longitudinal loading is critical when loads
are unbalanced and for broken conductor consideration.
Combined Load Curves: Load curve that combines the effects
of the various loads and plots working and ultimate strength of the
assembly. Load curves are supplied upon request.
Working Load Curve: The maximum load that can be applied to the
insulator for long periods of time, without damaging or fatiguing
the insulator.
Ultimate Load Curve: The load at which the assembly approaches
its ultimate strength, point of failure.
Braced Post Load Application: The maximum load (or worst case load) of a specific application should fit right at or below the working
load curve for that respective design. This max load is determined by the customer, and should take into account environmental influences
(wind, ice, etc) along with the utilities safety factor practice. Max load applications that surpass the working curve require upgrades in
strength for the braced post.
Strength Upgrades: Depending on the specific loading requirements, there are many ways to upgrade the strength of a braced post,
listed below are a few of the most common upgrades.
• Increase the SML of the brace insulator [~ increase Vertical Loading Capability]
• Increase the rod diameter of the line post [~ higher Vertical / Transverse Loading Capability]
• Change from fixed base to swivel base [~ improves Longitudinal Loading Capability]
• Dimensional design changes (Changes to upsweep angle, brace angle, height, etc.)
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-45
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post Insulators
Insulator Electrical Performance: The electrical values of an insulator
are driven by the dry arc distance, and the insulators’ contamination
performance is dictated by the leakage distance.
Dry Arc Distance: The shortest distance metal to metal up and along
the insulator tangent to the sheds. The electrical values for 60Hz &
critical impulse flashovers are statistically derived by the dry arc
distance of the insulator.
Assembly Strike Distance: In a combination assembly, the
individual dry arc distances of each insulator are usually not
the shortest paths metal to metal. This shorter path or dry arc
for the assembly is called the strike distance, which could be the
distance from the post base to the brace end fitting or corona ring,
or it could be the distance to the conductor hardware, especially on
double bundled assemblies with horizontal yoke plates. The strike
distance drives the electrical values of the braced post assembly.
Leakage Distance: The continuous path across the insulator from
metal to metal, measured across the profile of each shed. The
leakage distance is controlled by the number of sheds on the
insulator.
Assembly Leakage Distance: The leakage distance for a braced
post assembly is the shortest leakage distance of the 2 insulators
that make up the assembly. If the post has 230” of leakage, and the
brace has 180” of leakage, the braced post leakage distance is 180”.
The strike distance of the braced post assembly is typically
shorter than the dry arc distances of either the post or brace
insulators. Therefore, the electrical values of the individual
insulators are greater than the electrical values of the assembly.
The sketch above shows the various strike distances of the
assembly, the shortest of which determines the electrical values.
Recommended Corona Ring Application for the Braced Post
8” Corona Ring
Brace
Post
12” Corona Ring
230 kV
345 kV
8” Ring
12” Ring
None
6” Ring
High voltages can result in unwanted noise (RIV) and corona. To minimize the effects of corona, corona
rings are applied to one or both of the insulators of the assembly. 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. The table above shows the recommended corona
ring applications for 230kV & 345kV. The ultimate decision of corona ring application is determined
by the customer and by the environmental factors where the assembly will be used.
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-46
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post Insulators
Braced Post Design Options
Insulator Options
Line Post: Typically, the line post of the braced post assembly will
have a tongue line end fitting (F), and a bendable base tower
connection (E). The bendable base is available as a gain or
flat design type, or it can be replaced with a swivel or pivoting
base, depending on the requirements of the application.
Brace Insulator: The suspension insulator that makes up the
brace can be comprised of many end fitting combinations,
per customer preference. The Eye / Eye combination is a
commonly used design, it offers a greater degree of articulation
when combined with anchor shackles.
Bendable Gain
Bendable Flat
Swivel Base
Bendable Base – Formed steel base that mates with an anchor
end fitting on the insulator via 2 mounting bolts. These bases
provide some vertical articulation of the post, which offers
adjustment for the brace and connection hardware to the pole.
Bendable bases come in gain and flat designs, with 0° & 12° upsweep angles, as required for by application.
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.
Swivel Base or Pivoting Base – This base provides articulation
in the vertical and longitudinal directions.
This design is
typically used in areas where high longitudinal loading is required
to compensate for unbalanced loads or broken conductor conditions.
Pole Band Assemblies – Another method of attaching a braced
post assembly to a tower is by means of a pole band assembly.
Pole bands are used on poles when mount holes are not available
and cannot be drilled, or for maintenance / emergency response
applications. Contact MPS for additional details.
Brace Connection Hardware Options
The brace of the braced post assembly can be made up of many different insulator and hardware
combinations, depending on customer preference and design.
• The suspension insulator can make up the entire length of the brace, connected
to the post and tower via anchor shackles. This is the simplest and more cost
efficient design.
• The brace can consist of an electrically proportionate length suspension,
combined with shackles for G1. & G2, and some form of steel hardware for item
G3 (turnbuckle, straps, links, etc).
Options for G1
Options for G2
Options for
G3
EF Options
for SSL
Anchor Shackle (SL = Eye)
Socket/Clevis (SL = Y-Clevis)
Anchor Shackle (SL = Eye)
Turnbuckle
Steel Strap
Chain Links
Eye / Eye
Eye / Ball
Y-Clevis / Ball
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-47
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post Insulators
Custom Braced Post Designs
The MPS “Braced Post” section of this catalog has many standard designs available for system voltages 69kV through 230kV. If the designs
shown in the catalog do not exactly satisfy the requirements of an application, custom braced post designs are available. At the end of the
braced post section is a braced post request worksheet, which is designed to communicate the specific details of a custom braced post design
to MPS. The information provided on this sheet is used by MPS Design Engineering to develop the best fit design per customer request.
In order to properly develop these designs, it is important to know the specific requirements of the application along with clarification about
which details are most critical and which have some flexibility within the design. More Information = better designs and faster response time.
Braced Post Assembly Details: This section outlines the geometric/dimensional requirements of the assembly, including assembly
height, section length, and angles. Ideally, the dimensions required would be expressed as a nominal value, with some +/- tolerances.
When a specific dimension is absolutely required, it should be identified as “critical”. Not every dimension can be critical, as
some dimensions of the assembly are driven by others, therefore only 2-3 dimensions should be marked as critical.
Mechanical Loading Requirements: This section identifies the loading characteristics of the application. These values should be
ultimate loads the assembly will be expected to withstand over long periods of time, and should fit within the working load curve of the
assembly.
Electrical Requirements: This section determines the minimal requirement of the assembly with respect to electrical performance.
• Minimum leakage distance (and / or description of contamination level for the application)
• Minimum strike distance / dry arc
• Minimum requirements for 2 of the 4 electrical values (ex. Dry FO & CIFO+)
• Corona ring requirement
Assembly Details: The remaining sections identify the various options of the assembly…
• Line post base requirement
• Suspension end fitting requirements
• Hardware attachments
• Extension hardware
• Conductor information (armor rod)
• Conductor attachment hardware
Hardware Assemblies & Packaging
MPS provides a single catalog number & drawing for each braced post assembly, whether it is a standard catalog item, or a custom
design. The catalog number includes all the insulators, connection hardware, and conductor hardware as required, with all the various
catalog numbers of the individual components bundled into one catalog number.
Packaging: There are several options for packaging insulator assemblies. Typically, the individual components are bulk packed separately
and mated in the field by the customer. Custom packs and tower packs are available upon request. These value added options reduce
costs in the field, help minimize lost or missing parts, and reduce the time from receipt of goods to installation.
Tower Packs: Unique packaging where each component of the assembly is packed into one crate, usually in quantities of 3, 6, or 9.
MPS verifies fit and quantity of the components of the assembly. The crate can be marshaled out to the job site and dropped at the
tower, where it can then be assembled and installed.
Custom Packs: MPS packages components together as required by the customer.
For additional information about braced post assemblies, contact your local MPS Sales Representatives
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-48
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post - B191-XL Series
Identification
A = 1.5” [38mm] (not included) H = Assembly Height
(Tolerance = +/- 3”)
(pole connection offset)
SSL = Suspension Length
B = Brace Length
PSL = Post Section Length
C = Brace Angle
PSL
SSL
H
C
B
in (mm)
in (mm)
in (mm)
Deg.
in (mm)
1
32.0
(813)
35.4
(899)
35.0
(889)
54.0˚
40.9
(1039)
2
32.0
(813)
41.7
(42)
44.0
(1118)
63.0˚
47.2
(1199)
3
35.0
(889)
41.7
(1059)
42.0
(1067)
58.0˚
47.2
(1199)
4
35.0
(889)
46.4
(1179)
48.0
(1219)
62.0˚
51.9
(1318)
5
41.0
(1041)
46.4
(1179)
43.5
(1105)
53.0˚
51.9
(1318)
6
41.0
(1041)
54.3
(1379)
54.5
(1384)
61.0˚
59.8
(1519)
7
48.0
(1219)
54.3
(1379)
49.0
(1245)
52.0˚
59.8
(1519)
8
48.0
(1219)
60.6
(1539)
58.0
(1473)
58.0˚
66.1
(1679)
9
54.0
(1372)
60.6
(1539)
53.0
(1346)
50.0˚
66.1
(1679)
10
54.0
(1372)
65.3
(1659)
60.0
(1524)
55.0˚
70.8
(1798)
11
60.0
(1524)
65.3
(1659)
54.0
(1372)
47.0˚
70.8
(1798)
12
60.0
(1524)
71.7
(1821)
64.0
(1626)
53.0˚
77.2
(1961)
Fig.
List Of Materials:
Standard Strength Braced Posts
1) 2.0” Line Post Insulator (1 each)
2) 25klb MX Suspension Insulator (1 each)
3) SYC-56 Socket Y-Clevis (1 each)
4) ASH-55 Anchor Shackle (2 each)
Fig.
Catalog Number
Electrical Flashover (kV)
Weight
Line
Voltage
MDCL
Dry Arc
Leakage
kV
lbs (kN)
in (mm)
in (mm)
Dry
Wet
Pos
Neg
lbs. (kg)
234
213
298
490
46.5
(21.1)
60 Hz
CIFO
1
B191032XL4AM 1
69
10,387
23.3
51.2
(1300)
2
B191032XL4AM 2
69
11,330
24.5
51.2
(1300)
245
223
416
509
46.4
(21.0)
3
B191035XL4AM 1
69
10,200
29.3
55.9
(1420)
288
264
491
586
47.8
(21.7)
4
B191035XL4AM 2
69
11,200
30.4
37.3
(1709)
298
274
509
604
50.1
(22.7)
5
B191041XL4AM 1
69
10,048
36.3
79.3
(2014)
351
325
603
691
53.5
(24.3)
6
B191041XL4AM 2
115
10,949
37.2
79.5
(2019)
359
332
617
704
53.2
(24.1)
7
B191048XL4AM 1
115
10,023
42.4
85.6
(2174)
405
375
699
775
55.3
(25.1)
8
B191048XL4AM 2
115
10,908
43.3
85.6
(2174)
414
383
714
787
55.0
(24.9)
9
B191054XL4AM 1
138
10,043
48.5
91.5
(2324)
460
426
797
851
56.8
(25.8)
10
B191054XL4AM 2
138
10,762
49.2
96.7
(2456)
466
431
808
860
57.9
(26.3)
11
B191060XL4AM 1
138
10,043
48.5
91.5
(2324)
460
426
797
851
56.8
(25.8)
12
B191060XL4AM 2
138
10,762
49.2
96.7
(2456)
466
431
808
860
57.9
(26.3)
Notes:
• MDCL = Max. Design Cantilever Load (Load Curves provided upon request)
• Electrical Data is derived from the assembly “Strike Distance”, without corona rings for 161kV and below. All 230kV Braced Post assemblies
supplied with a corona ring (Electrical Values include the corona ring).
• B191 Series supplied with standard G2-0 Bendable Gain Base on line post.
• For Flat Base F2-0, change the "9" in B191… to "1" = B111…[See line post base section for details]
• For Higher Strength or Custom Designs, please complete the Braced Post Request Worksheet at the end of this section and return the
competed worksheet to MPS through your local MPS Sales Representative.
• Customized Designs include any dimensional changes, strength changes, hardware changes, end fitting changes, etc.
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-49
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post - B191-XT Series
H
PSL
B
SSL
C
Fig.
MIN
MAX
MIN
MAX
in (mm)
in (mm)
in (mm)
in (mm)
Deg.
in (mm)
in (mm)
1
36.0
(914)
35.4
(899)
50.0
(1270)
57.5
(1461)
63˚ - 68˚
53.58
(1367)
59.5
(1519)
2
36.0
(914)
35.4
(899)
54.0
(1372)
65.0
(1651)
66˚ - 71˚
56.9
(1445)
65.9
(1674)
3
41.0
(1041)
41.7
(1059)
55.0
(1397)
63.0
(1600)
62˚ - 66˚
60.1
(1527)
66.0
(1676)
4
41.0
(1041)
41.7
(1059)
59.0
(1499)
70.0
(1778)
64˚ - 69˚
63.2
(1605)
72.2
(1834)
5
47.0
(1194)
46.4
(1179)
57.0
(1448)
65.5
(1664)
58˚ - 63˚
64.8
(1646)
70.8
(1798)
6
47.0
(1194)
46.4
(1179)
61.5
(1562)
73.0
(1854)
61˚ - 66˚
67.9
(1725)
76.9
(1953)
7
54.0
(1372)
54.3
(1379)
63.0
(1600)
71.5
(1816)
57˚ - 61˚
72.7
(1847)
78.7
(1999)
8
54.0
(1372)
54.3
(1379)
37.5
(1715)
79.0
(2007)
59˚ - 64˚
75.8
(1925)
84.8
(2154)
9
60.0
(1524)
60.3
(1532)
67.0
(1702)
75.5
(1918)
55˚ - 59˚
78.7
(1999)
84.7
(2151)
10
60.0
(1524)
60.3
(1532)
71.5
(1816)
83.5
(2121)
57˚ - 63˚
81.8
(2078)
90.8
(2306)
11
65.0
(1651)
65.3
(1659)
69.5
(1765)
78.5
(1994)
53˚ - 58˚
83.7
(2126)
89.7
(2278)
12
65.0
(1651)
65.3
(1659)
74.5
(1892)
86.5
(2197)
56˚ - 61˚
86.8
(2205)
95.8
(2433)
List Of Materials:
1) 2.0” Line Post Insulator (1 each)
2) 25klb MX Suspension Insulator (1 each)
3) SYC-56 Socket Y-Clevis (1 each)
4) Turnbuckle
Fig.
Catalog Number
1
B191036XT4AM6
2
B191036XT4AM9
3
B191041XT4AM6
4
B191041XT4AM9
5
B191047XT4AM6
6
B191047XT4AM9
7
B191054XT4AM6
8
B191054XT4AM9
9
B191060XT4AM6
10
B191060XT4AM9
11
B191065XT4AM6
12
B191065XT4AM9
Electrical Flashover (kV)
Weight
Line
Voltage
MDCL
kV
lbs (kN)
in (mm)
in (mm)
Dry
Wet
Pos
Neg
lbs. (kg)
69
11,369
(50.6)
26.6
(676)
60.8
(1544)
264
242
449
544
62.3
(28.3)
69
11,233
(50.0)
31.6
(803)
76.8
(1951)
309
285
529
622
66.7
(30.3)
115
10,851
(48.3)
37.4
(950)
89.0
(2261)
361
334
620
707
70.8
(32.1)
115
/138
10,652
(47.4)
44.4
(1128)
109.2
(2774)
424
392
732
801
76.0
(34.5)
138
10,448
(46.5)
50.4
(1280)
125.2
(3180)
477
441
827
876
80.5
(36.5)
138
/161
10,250
(45.6)
55.4
(1407)
137.4
(3490)
520
480
905
950
84.4
(38.3)
Dry Arc
Leakage
60 Hz
CIFO
Notes:
• MDCL = Max. Design Cantilever Load (Load Curves provided upon request)
• Electrical Data is derived from the assembly “Strike Distance”, without corona rings for 161kV and below. All 230kV Braced Post assemblies
supplied with a corona ring (Electrical Values include the corona ring).
• B191 Series supplied with standard G2-0 Bendable Gain Base on line post.
• For Flat Base F2-0, change the "9" in B191… to "1" = B111…[See line post base section for details]
• For Higher Strength or Custom Designs, please complete the Braced Post Request Worksheet at the end of this section and return the
competed worksheet to MPS through your local MPS Sales Representative.
• Customized Designs include any dimensional changes, strength changes, hardware changes, end fitting changes, etc.
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-50
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post - B291-XL Series
Identification
A = 1.5” [38mm] (not included) H = Assembly Height
(Tolerance = +/- 3”)
(pole connection offset)
SSL = Suspension Length
B = Brace Length
PSL = Post Section Length
C = Brace Angle
PSL
SSL
H
C
B
in (mm)
in (mm)
in (mm)
Deg.
in (mm)
1
35.0
(889)
39.0
(991)
37.9
(963)
54˚
44.5
(1130)
2
41.0
(1041)
45.0
(1143)
41.5
(1054)
52˚
50.5
(1283)
3
45.0
(1143)
49.0
(1245)
44.0
(1118)
50˚
54.5
(1384)
4
52.6
(1336)
58.0
(1473)
51.5
(1308)
50˚
63.5
(1613)
5
54.0
(1372)
75.0
(1905)
74.0
(1880)
62˚
80.5
(2045)
6
58.5
(1486)
67.9
(1725)
59.8
(1519)
51˚
72.5
(1842)
7
59.0
(1499)
84.0
(2134)
83.0
(2108)
63˚
89.5
(2273)
8
61.5
(1562)
70.0
(1778)
61.5
(1562)
50˚
75.5
(1918)
9
65.0
(1651)
93.0
(2362)
91.0
(2311)
63˚
98.5
(2502)
10
67.4
(1712)
78.0
(1981)
68.2
(1732)
51˚
83.5
(2121)
11
70.4
(1788)
81.0
(2057)
69.9
(1775)
54˚
86.5
(2197)
12
70.0
(1778)
100.0
(2540)
96.0
(2438)
62˚
105.5
(2680)
13
75.0
(1905)
88.0
(2235)
75.0
(1904)
51˚
93.5
(2375)
14
84.0
(2134)
100.0
(2540)
85.0
(2159)
51˚
105.5
(2680)
15
85.0
(2159)
123.0
(3124)
118.0
(2997)
63˚
128.5
(3264)
16
90.0
(2286)
107.0
(2718)
90.0
(2287)
51˚
112.5
(2858)
17
90.0
(2286)
133.0
(3378)
127.0
(3226)
63˚
138.5
(3518)
18
96.0
(2438)
114.0
(2896)
95.0
(2413)
50˚
119.5
(3035)
Fig.
List Of Materials:
Standard Strength Braced Posts
5) 2.5” Line Post Insulator (1 each)
6) 25klb (S199) Suspension Insulator (1 each)
7) ASH-55 Anchor Shackle (2 each)
Notes:
• MDCL = Max. Design Cantilever Load (Load Curves provided upon request)
• Electrical Data is derived from the assembly “Strike Distance”, without
corona rings for 161kV and below. All 230kV Braced Post assemblies
supplied with a corona ring (Electrical Values include the corona ring).
• HS = High Strength design. Brace SML = 36k
• For Higher Strength or Custom Designs, please complete the Braced Post
Request Worksheet at the end of this section and return the competed
worksheet to MPS through your local MPS Sales Representative.
• B191 Series supplied with standard G2-0 Bendable Gain Base on line post.
• For Flat Base F2-0, change the “9” in B191… to “1” = B111…[See line post
base section for details]
• Customized Designs include any dimensional changes, strength changes,
hardware changes, end fitting changes, gain to flat base changes, etc.
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-51
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post - B291-XL Series
Continued...
Fig.
Catalog Number
Electrical Flashover (kV)
Line
Voltage
MDCL
kV
lbs (kN)
Dry Arc
2
B291035XL99 B
in (mm)
69
10,375
(46.2)
23.3
(591)
B291041XL99 A
48.5 (1232)
69
10,028
(44.6)
28.8
(731)
5
6
7
8
9
10
11
B291045XL99 B
70.3 (1786)
9,910
(44.1)
33.2
(843)
104.5 (2654)
124.7 (3167)
B291052XL99 A
75.6 (1920)
115
9,829
(43.7)
40.6
(1031)
95.0 (2413)
B291052XL99 C
125.9 (3198)
B291054XL99 A
81.0 (2057)
B291054XL99 B
115
11,295
(50.2)
43.8
(1113)
111.6 (2835)
B291054XL99 C
138.8 (3526)
B291058XL99 A
92.3 (2344)
B291058XL99 B
138
10,032
(44.6)
46.8
(1189)
123.3 (3132)
B291058XL99 C
145.9 (3706)
B291059XL99 D
97.7 (2482)
B291059XL99 B
138
11,377
(50.6)
49.1
(1247)
124.8 (3170)
B291059XL99 C
155.8 (3957)
B291061XL99 A
9135 (2324)
B291061XL99 B
138
9,908
(44.1)
49.7
(1262)
122.4 (3109)
B291061XL99 C
153.4 (3896)
B291065XL99 A
109.2 (2774)
B291065XL99 B
Wet
Pos
Neg
161
11,352
(50.5)
55.2
(1402)
136.4 (3465)
lbs (kg)
63.6 (28.9)
233
212
396
489
64.5 (29.3)
65.7 (29.8)
68.4 (31.0)
283
260
484
578
70.2 (31.9)
71.7 (32.5)
78.2 (1986)
115
B291045XL99 C
B291052XL99 B
Dry
90.7 (2304)
B291045XL99 A
4
60.4 (1534)
72.4 (1839)
B291041XL99 C
3
in (mm)
CIFO
48.9 (1242)
B291035XL99 C
B291041XL99 B
Weight
60 Hz
B291035XL99 A
1
Leakage
72.2 (32.7)
323
298
553
645
74.3 (33.7)
76.0 (34.5)
77.9 (35.4)
390
361
671
751
79.4 (36.0)
81.8 (37.1)
66.7 (30.3)
418
387
722
793
72.8 (33.0)
78.7 (35.7)
82.8 (37.6)
444
411
769
830
85.2 (38.7)
87.0 (39.5)
70.7 (32.1)
465
430
805
858
76.6 (34.7)
83.4 (37.8)
84.7 (38.4)
470
435
815
865
87.1 (39.5)
89.5 (40.6)
74.1 (33.6)
518
479
902
947
80.0 (36.3)
B291065XL99 C
163.6 (4155)
85.9 (39.0)
B291067XL99 A
107.2 (2723)
89.6 (40.7)
B291067XL99 B
161
9,969
(44.3)
55.8
(1417)
142.0 (3607)
B291067XL99 C
173.0 (4394)
B291070XL99 A
106.0 (2692)
B291070XL99 B
161
9,870
(43.9)
B291070XL99 C
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
58.7
(1491)
141.2 (3586)
182.6 (4638)
IN-52
523
483
911
956
92.3 (41.9)
94.7 (43.0)
91.4 (41.5)
549
506
957
1000
94.1 (42.7)
97.4 (44.2)
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post - B291-XL Series
Continued...
Fig.
Catalog Number
Electrical Flashover (kV)
Line
Voltage
MDCL
kV
lbs (kN)
Dry Arc
13
B291070XL99 J
in (mm)
161
11,276
(50.2)
60.0
(1524)
B291075XL99 A
113.3 (2878)
161
9,901
(44.0)
63.7
(1618)
16
17
18
B291084AL99 B
140.4 (3566)
9,951
(44.3)
69.7
(1770)
202.7 (5149)
228.0 (5791)
B291085AL99 A
156.1 (3965)
230
11,305
(50.3)
72.3
(1836)
193.1 (4905)
B291085AL99 C
237.4 (6030)
B291090AL99 A
155.6 (3952)
B291090AL99 B
230
9,887
(44.0)
75.8
(1925)
202.0 (5131)
B291090AL99 C
239.0 (6071)
B291090AL99 D
162.0 (4115)
B291090AL99 E
230
11,357
(50.5)
77.3
(1963)
207.3 (5265)
B291090AL99 F
247.4 (6284)
B291096AL99 A
154.8 (3932)
B291096AL99 B
Wet
Pos
Neg
230
9,830
(43.7)
81.5
(2070)
B291096AL99 C
199.8 (5075)
258.7 (6571)
lbs (kg)
78.8 (35.7)
560
516
978
1019
84.0 (38.1)
92.7 (42.0)
94.7 (43.0)
593
545
1036
1074
96.8 (43.9)
101.0 (45.8)
151.3 (3843)
230
B291084AL99 C
B291085AL99 B
Dry
194.6 (4943)
B291084AL99 A
15
150.6 (3825)
191.1 (4854)
B291075XL99 C
14
in (mm)
CIFO
125.3 (3183)
B291070XL99 K
B291075XL99 B
Weight
60 Hz
B291070XL99 I
12
Leakage
9038 (41.2)
644
590
1129
1162
101.7 (46.1)
107.5 (48.8)
91.6 (41.5)
666
609
1168
1200
99.7 (45.2)
109.3 (49.6)
93.0 (42.2)
696
635
1222
1251
102.9 (46.7)
110.9 (50.3)
93.6 (42.5)
709
646
1245
1273
103.5 (46.9)
112.2 (50.9)
93.6 (42.5)
745
676
1308
1333
103.4 (46.9)
116.2 (52.7)
Data in this table corresponds with the Sketches on the previous page.
Notes:
• MDCL = Max. Design Cantilever Load (Load Curves provided upon request)
• Electrical Data is derived from the assembly “Strike Distance”, without corona rings for 161kV and below. All
230kV Braced Post assemblies supplied with a corona ring (Electrical Values include the corona ring).
• HS = High Strength design. Brace SML = 36k
• For Higher Strength or Custom Designs, please complete the Braced Post Request Worksheet at the end of this
section and return the competed worksheet to MPS through your local MPS Sales Representative.
• Customized Designs include any dimensional changes, strength changes, hardware changes, end fitting
changes, gain to flat base changes, etc.
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-53
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post - B291-XL High Strength Series
Identification
A = 1.5” [38mm] (not included) H = Assembly Height
(Tolerance = +/- 3”)
(pole connection offset)
SSL = Suspension Length
B = Brace Length
PSL = Post Section Length
C = Brace Angle
PSL
SSL
H
C
B
in (mm)
in (mm)
in (mm)
Deg.
in (mm)
5
54.0
(1372)
75.0
(1905)
74.0
(1880)
62˚
80.5
(2045)
7
59.0
(1499)
84.0
(2134)
83.0
(2108)
63˚
89.5
(2273)
9
65.0
(1651)
93.0
(2362)
91.0
(2311)
63˚
98.5
(2502)
12
70.0
(1778)
100.0
(2540)
96.0
(2438)
62˚
105.5
(2680)
15
85.0
(2159)
123.0
(3124)
118.0
(2997)
63˚
128.5
(3264)
17
90.0
(2286)
133.0
(3378)
127.0
(3226)
63˚
138.5
(3518)
Fig.
High Strength Braced Posts [marked “HS”]
1) 2.5” Line Post Insulator (1 each)
2) 36klb (S699) Suspension Insulator (1 each)
3) ASH-56 Anchor Shackle (2 each)
Fig.
Catalog Number
Electrical Flashover (kV)
Line
Voltage
MDCL
kV
lbs (kN)
Dry Arc
7
9
12
15
17
B291054XL99 M
in (mm)
in (mm)
115
14,000
(62.3)
43.8
(1113)
109.8 (2789)
138.8 (3526)
B291059XL99 L
99.4 (2525)
138
14,000
(62.3)
49.1
(1247)
122.6 (3114)
B291059XL99 N
157.5 (4001)
B291065XL99 L
108.4 (2753)
B291065XL99 M
161
14,000
(62.3)
55.2
(1402)
135.5 (3442)
B291065XL99 N
163.6 (4155)
B291070XL99 L
127.0 (3226)
B291070XL99 M
161
14,000
(62.3)
60.0
(1524)
150.2 (3815)
B291070XL99 N
191.3 (4859)
B291085XL99 L
156.9 (3985)
B291085XL99 M
230
14,000
(62.3)
72.3
(1836)
192.6 (4892)
B291085XL99 N
238.4 (6055)
B291090XL99 L
162.0 (4115)
B291090XL99 M
Dry
CIFO
Wet
Pos
Neg
82.7 (2101)
B291054XL99 N
B291059XL99 M
Weight
60 Hz
B291054XL99 L
5
Leakage
230
13,577
(60.4)
B291090XL99 N
77.3
(1963)
206.5 (5245)
245.2 (6228)
lbs (kg)
68.3 (31.0)
418
387
722
793
74.4 (33.7)
80.3 (36.4)
72.3 (32.8)
465
430
805
858
78.2 (35.5)
85.0 (38.6)
75.7 (34.3)
518
479
902
947
81.6 (37.0)
87.5 (39.7)
80.4 (36.5)
560
516
978
1019
85.6 (38.8)
94.3 (42.8)
93.2 (42.3)
666
609
1168
1200
101.3 (45.9)
110.9 (50.3)
95.2 (43.2)
709
646
1245
1273
105.1 (47.7)
113.8 (51.6)
Notes:
• MDCL = Max. Design Cantilever Load (Load Curves provided upon request)
• Electrical Data is derived from the assembly “Strike Distance”, without corona rings for 161kV and below. All
230kV Braced Post assemblies supplied with a corona ring (Electrical Values include the corona ring).
• HS = High Strength design. Brace SML = 36k
• For Higher Strength or Custom Designs, please complete the Braced Post Request Worksheet at the end of
this section and return the competed worksheet to MPS through your local MPS Sales Representative.
• Customized Designs include any dimensional changes, strength changes, hardware changes, end fitting
changes, gain to flat base changes, etc.
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-54
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post - B291-XT Series
Identification
A = 1.5” [38mm] (not included)
(pole connection offset)
B = Brace Length
C = Brace Angle
H = Assembly Height
TB = Turnbuckel
SSL = Suspension Length
PSL = Post Section Length
H
PSL
List Of Materials:
5) 2.5” Line Post Insulator (1 each)
6) 25klb MX Suspension Insulator (1 each)
7) SYC-56 Socket Y-Clevis (1 each)
8) Turnbuckle
Fig.
Catalog Number
1
B291035XT4M6
2
B291035XT4M9
3
B291041XT4M6
4
B291041XT4M9
5
B291048XT4M6
6
B291048XT4M9
7
B291053XT4M6
8
B291053XT4M9
9
B291062XT4M6
10
B291062XT4M9
11
B291066XT4M6
12
B291066XT4M9
C
B
SSL
Fig.
MIN
MAX
MIN
MAX
in (mm)
in (mm)
in (mm)
in (mm)
Deg.
in (mm)
in (mm)
1
34.8
(884)
35.4
(899)
51.0
(1295)
58.0
(1473)
65˚ - 69˚
53.8
(1367)
59.8
(1519)
2
34.8
(884)
35.4
(899)
55.0
(1397)
65.0
(1651)
67˚ - 72˚
56.9
(1445)
65.9
(1674)
3
40.7
(1034)
41.7
(1059)
55.5
(1410)
62.5
(1588)
62˚ - 66˚
60.1
(1527)
66.0
(1676)
4
40.7
(1034)
41.7
(1059)
59.5
(1511)
70.0
(1778)
65˚ - 70˚
63.2
(1605)
72.2
(1834)
5
48.0
(1219)
46.4
(1179)
57.0
(1448)
64.5
(1638)
57˚ - 62˚
64.8
(1646)
70.8
(1798)
6
48.0
(1219)
46.4
(1179)
61.0
(1549)
72.0
(1829)
60˚ - 65˚
67.9
(1725)
76.9
(1953)
7
52.6
(1336)
54.3
(1379)
64.5
(1638)
72.0
(1829)
58˚ - 62˚
72.7
(1847)
78.7
(1999)
8
52.6
(1336)
54.3
(1379)
68.5
(1740)
79.5
(2019)
60˚ - 65˚
75.8
(1925)
84.8
(2154)
9
61.5
(1562)
603
(1532)
66.0
(1676)
74.0
(1880)
53˚ - 57˚
78.7
(1999)
84.7
(2151)
10
61.5
(1562)
60.3
(1532)
70.5
(1791)
82.5
(2096)
56˚ - 61˚
81.8
(2078)
90.8
(2306)
11
66.0
(1676)
65.3
(1659)
69.0
(1753)
77.0
(1956)
52˚ - 56˚
83.7
(2126)
89.7
(2278)
12
66.0
(1676)
65.3
(1659)
73.5
(1867)
86.0
(2184)
55˚ - 60˚
86.8
(2205)
95.8
(2433)
Electrical Flashover (kV)
Line
Voltage
MDCL
kV
lbs (kN)
in (mm)
in (mm)
Dry
Wet
Pos
Neg
lbs (kg)
69
11,528
(51.3)
25.6
(650)
60.8
(1544)
255
233
433
527
72.0
(32.7)
69
11,265
(50.1)
31.3
(795)
76.8
(1951)
307
282
524
628
77.0
(34.9)
115
10,740
(47.8)
38.3
(973)
89.0
(2261)
370
342
635
720
80.0
(36.3)
155
/138
11,320
(50.4)
43.5
(1105)
109.2
(2774)
415
385
717
789
88.0
(39.9)
138
10,301
(45.8)
51.9
(1318)
125.2
(3180)
489
452
849
897
96.0
(43.5)
138
/161
10,130
(45.1)
56.4
(1433)
137.4
(3490)
529
488
921
965
94.0
(42.6)
Dry Arc
Leakage
Weight
60 Hz
CIFO
Notes:
• MDCL = Max. Design Cantilever Load (Load Curves provided upon request)
• Electrical Data is derived from the assembly “Strike Distance”, without corona rings for 161kV and below. All 230kV Braced Post assemblies
supplied with a corona ring (Electrical Values include the corona ring).
• HS = High Strength design. Brace SML = 36k
• For Higher Strength or Custom Designs, please complete the Braced Post Request Worksheet at the end of this section and return the competed
worksheet to MPS through your local MPS Sales Representative.
• B191 Series supplied with standard G2-0 Bendable Gain Base on line post.
• For Flat Base F2-0, change the “9” in B191… to “1” = B111…[See line post base section for details]
• Customized Designs include any dimensional changes, strength changes, hardware changes, end fitting changes, gain to flat base changes, etc.
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-55
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post - B261 Series w/ Swivel Base
Identification
A = pole connection offset (not included)
B = Brace Length
C = Brace Angle
H = Assembly Height (Tolerance = +/- 3”)
SSL = Suspension Length
PSL = Post Section Length
PSL
SSL
H
A
C
B
in (mm)
in (mm)
in (mm)
in (mm)
Deg.
in (mm)
1
54.0
(1372)
52.0
(1321)
51.0
(1295)
18.0
(457)
57˚
57.5
(1461)
2
60.0
(1524)
58.0
(1473)
56.0
(1422)
20.0
(508)
57˚
63.5
(1613)
3
66.0
(1676)
64.0
(1626)
61.0
(1549)
22.0
(559)
57˚
69.5
(1765)
4
72.0
(1829)
70.0
(1778)
66.0
(1676)
24.0
(610)
56˚
75.5
(1918)
5
87.0
(2210)
87.0
(2210)
80.0
(2032)
28.0
(711)
56˚
92.5
(2350)
6
93.0
(2362)
93.0
(2362)
85.0
(2159)
30.0
(762)
56˚
98.5
(2502)
Fig.
List Of Materials
Standard Strength Braced Posts
1) 2.5” Line Post Insulator (1 each)
2) 25klb (S199) Suspension Insulator (1 each)
3) ASH-55 Anchor Shackle (2 each)
High Strength Braced Posts [marked “HS”]
1) 2.5” Line Post Insulator (1 each)
2) 36klb (S699) Suspension Insulator (1 each)
3) ASH-56 Anchor Shackle (2 each)
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
Notes:
• MDCL = Max. Design Cantilever Load (Load Curves provided
upon request)
• Electrical Data is derived from the assembly “Strike Distance,”
without corona rings for 161kV and below. All 230kV Braced Post
assemblies supplied with a corona ring (Electrical Values include
the corona ring).
• HS = High Strength design. Brace SML = 36k
• For Higher Strength or Custom Designs, please complete the
Braced Post Request Worksheet at the end of this section and
return the competed worksheet to MPS through your local MPS
Sales Representative.
• Customized Designs include any dimensional changes, strength
changes, hardware changes, end fitting changes, gain to flat base
changes, etc.
IN-56
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Braced Post - B261 Series w/ Swivel Base
Fig.
Catalog Number
Electrical Flashover (kV)
Line
Voltage
MDCL
kV
lbs (kN)
Dry Arc
Weight
60 Hz
in (mm)
B261054XL99 A
B261054XL99 B
Leakage
in (mm)
Dry
CIFO
Wet
Pos
Neg
83.7 (2126)
115
10,538
(46.9)
42.6
(1082)
B261054XL99 C
106.3 (2700)
lbs (kg)
49.2 (22.3)
408
378
704
778
129.0 (3277)
54.0 (24.5)
59.0 (26.8)
1
B261054XL99 L
B261054XL99 M
82.9 (2106)
HS
14,000
(62.3)
42.6
(1082)
106.0 (2692)
B261054XL99 N
129.0 (3277)
B261060XL99 A
102.7 (2609)
B261060XL99 B
138
10,494
(46.7)
48.6
(1234)
122.0 (3099)
B261060XL99 C
149.1 (3787)
B261060XL99 L
100.5 (2553)
50.3 (22.8)
408
378
704
778
55.1 (25.0)
60.1 (27.3)
54.4 (24.7)
460
426
798
852
28.9 (26.7)
64.3 (29.2)
2
B261060XL99 M
HS
14,000
(62.3)
48.6
(1234)
123.7 (3142)
B261060XL99 N
146.9 (3731)
B261066XL99 A
112.6 (2860)
B261066XL99 B
161
10,458
(46.5)
54.5
(1384)
139.7 (3548)
B261066XL99 C
163.7 (4158)
B261066XL99 L
110.4 (2804)
55.5 (25.2)
460
426
798
852
60.0 (27.2)
65.4 (29.7)
57.7 (26.2)
513
474
892
937
63.5 (28.8)
68.8 (31.2)
3
B261066XL99 M
HS
14,000
(62.3)
54.5
(1384)
137.5 (3493)
B261066XL99 N
164.5 (4178)
B261072XL99 A
122.4 (3109)
B261072XL99 B
161
10,427
(46.4)
60.5
(1537)
153.4 (3896)
B261072XL99 C
188.2 (4780)
B261072XL99 L
120.2 (3053)
58.8 (26.7)
513
474
892
937
64.6 (29.3)
69.9 (31.7)
61.0 (27.7)
565
520
986
1027
37.2 (30.5)
74.9 (34.0)
4
B261072XL99 M
HS
14,000
(62.3)
60.5
(1537)
B261072XL99 N
62.1 (28.2)
565
520
986
1027
186.0 (4724)
B261087XL99 A
B261087XL99 B
151.2 (3840)
76.0 (34.5)
154.9 (3934)
230
10,380
(46.2)
72.2
(1834)
193.6 (4917)
B261087XL99 C
228.4 (5801)
B261087XL99 L
152.7 (3879)
68.3 (31.0)
74.2 (33.7)
665
608
116
1198
82.7 (37.5)
89.9 (40.8)
5
B261087XL99 M
HS
14,000
(62.3)
72.2
(1834)
191.4 (4862)
B261087XL99 N
225.5 (5728)
B261093XL99 A
163.6 (4155)
B261093XL99 B
230
10,361
(46.1)
78.1
(1984)
208.9 (5306)
B261093XL99 C
245.1 (6226)
B261093XL99 L
162.6 (4130)
75.3 (34.2)
665
608
116
1198
83.8 (38.0)
91.0 (41.3)
77.5 (35.2)
716
652
1258
1285
87.4 (39.6)
95.1 (43.1)
6
B261093XL99 M
HS
13,577
(60.4)
B261093XL99 N
78.1
(1984)
208.9 (5306)
243.9 (6195)
78.6 (35.7)
716
652
1258
1285
88.5 (40.1)
96.2 (43.6)
Data on this table corresponds with the sketches on the previous page.
Notes:
• MDCL = Max. Design Cantilever Load (Load Curves provided upon request)
• Electrical Data is derived from the assembly “Strike Distance”, without corona rings for 161kV and below. All
230kV Braced Post assemblies supplied with a corona ring (Electrical Values include the corona ring).
• HS = High Strength design. Brace SML = 36k
• For Higher Strength or Custom Designs, please complete the Braced Post Request Worksheet at the end of
this section and return the competed worksheet to MPS through your local MPS Sales Representative.
• Customized Designs include any dimensional changes, strength changes, hardware changes, end fitting
changes, gain to flat base changes, etc.
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-57
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com
Custom Braced Post Request Sheet
Name:
Project Title:
Company:
Quantity Required:
Contact #:
Requested Delivery Date:
System Voltage (kV):
For Standard Design, fill in catalog number below:
_______________________________________________
Proceed to Conductor Information...
Custom Braced Post Design
Brace Post Assembly Details**
Item #
Description
Nominal
PSL
Post Section Length
SSL
Suspenstion Section Length
H
Assembly Height
A
Vang Length
B
Brace Length
C
Brace Angle
D
Post Upsweep Angle
Max.
Min.
Post Insulator Customization
Name
Mechanical Load Requirements (Minimum)
ID#
Post Base Type
E.
F.
Tension
lbs.
Post Line End Fitting
Vertical
lbs.
Suspension Insulator Customization
Longitudinal
lbs.
Compression
lbs
Low End Fitting
SL.
Tower End Fitting
ST.
Description
New #
Harware Attachment Cutomization
Electrical Requirements (Minimum)
Leakage
inch
Dry Arc Length
inch
Susp. to Post Connect
G1.
Susp. to Tower (vang)
G2.
Extension to Tower (Select 1 Option)
60 Hz Flashover DRY
kV
60 Hz Flashover WET
kV
CIFO Positive (+)
kV
CIFO Negative (-)
kV
None / Insulator Only
Steel Strap
G3.
Turnbuckle
Other (specify)
Corona Rings Required on: (Circle One)
Conductor Attachment Hardware
None
Suspenstion
Post
Suspension Clamp
J.
Attachment Hardware
J1.
Conductor Information
Conductor Name:
Size (OD):
Armor Rod
Yes
Other
No
** Specify which dimensions are critical to the application by adding a tolerance (Max/Min). For the remaining dimensions, provide only the nominal
value. MPS will attempt to meet these values, but may change them to meet the critical dimensions.
© Copyright 2010 MacLean Power Systems
Issued: May 2010
Supercedes: n/a
IN-58
11411 Addison Avenue, Franklin Park, IL 60131
T: 847.455.0014 F: 847.455.0029
www.macleanpower.com