Porcelain Insulators and Bushings
for the Harshest Environments
Serving the needs of the Global Electric Power Industry
www.meisterintl.com
With over 25 years of international industrial business
experience, Meister International provides the highest
quality porcelain insulators and porcelain bushings to
switchgear and transformer manufacturers around the
world. Large utilities, bus-duct and high-voltage switch
manufacturers, along with service and repair shops rely
on us for their porcelain A20 and A30 bus insulators,
porcelain standoff insulators, porcelain station post
insulators, and porcelain bushings.
NEMA Rated A20 and A30 Indoor
Bus Support Insulators
A20 Bus Insulators
Part No.
A20-1
A20-2
A20-3
A20-4
Perimeter Bolt Holes
Center Bolt Hole
Height (Inches)
Diameter (Inches)
Bolt Circle (Inches)
Voltage Rating (kV)
Impulse Withstand (kV)
Low Freq. Dry Withstand (kV)
Centilever Stength (in. - lbs.)
Torsion Strength (in. - lbs.)
Tension Strength (lbs.)
Compression Strength (lbs.)
3/8-16
1/2-13
3.5
4.5
2
4.8
60
19
1000
2500
2000
20000
3/8-16
1/2-13
4.5
4.5
2
7.2
75
26
1500
3500
3000
20000
3/8-16
1/2-13
6
4.5
2
13.2
95
36
1250
3500
3000
20000
3/8-16
1/2-13
7.5
4.5
2
14.4
110
50
1000
3500
300
20000
A30 Bus Insulators
Part No.
Perimeter Bolt Holes
Center Bolt Hole
Height (Inches)
Diameter (Inches)
Bolt Circle (Inches)
Voltage Rating (kV)
Impulse Withstand (kV)
Low Freq. Dry Withstand (kV)
Centilever Stength (in. - lbs.)
Torsion Strength (in. - lbs.)
Tension Strength (lbs.)
Compression Strength (lbs.)
A30-1 A30-2 A30-3 A30-4
1/2-13 1/2-13
3/4-10 3/4-10
3.5
4.5
6
6
3
3
4.8
7.2
60
75
19
26
2000 3000
4500 6000
3500 5000
30000 30000
1/2-13
3/4-10
6
6
3
13.2
95
36
2500
6000
5000
30000
1/2-13
3/4-10
7.5
6
3
14.4
110
50
2000
6000
5000
30000
A30-5
A30-6
1/2-13
3/4-10
10.5
6
3
23
150
60
1500
6000
5000
30000
1/2-13
3/4-10
15
6
3
34.5
200
80
1250
6000
5000
30000
Porcelain Station Post Insulators
Meister International supplies Porcelain Station Post Insulators
for applications through 1800kV BIL. Listed below are the most
commonly requested station post insulators used in both Utility
and Industrial Substations. All station post insulators are tested
to the requirements of ANSI C29.9
7.5kV to 69kV Station Post Insulators
Standard Strength (3 inch bolt circle)
TR#
Voltage (kV)
BIL (kV)
Height (In.)
Cantilever (lbs.)
TR202
TR205
TR208
TR210
TR214
TR216
7.5
15
23
34.5
46
69
95
110
150
200
250
350
7.5
10
14
18
22
30
2000
2000
2000
2000
2000
1500
High Strength (3 inch bolt circle)
TR#
Voltage (kV)
BIL (kV)
Height (In.)
Cantilever (lbs.)
TR222
TR225
TR227
TR231
TR267
TR278
7.5
15
23
34.5
46
69
95
110
150
200
250
350
10
12
15
20
24
30
4000
4000
4000
4000
4000
3000
115kV to 230kV Station Post Insulators
Standard Strength (5 inch bolt circle)
TR#
Voltage (kV)
BIL (kV)
Height (In.)
Cantilever (lbs.)
TR286
TR288
TR291
TR304
TR312
115
138
161
230
230
550
650
750
900
1050
45
54
62
80
92
1700
1450
1200
950
800
High Strength (5 inch bolt circle)
TR#
Voltage (kV)
BIL (kV)
Height (In.)
Cantilever (lbs.)
TR287
TR289
TR295
TR308
TR316
115
138
161
230
230
550
650
750
900
1050
45
54
62
80
92
2600
2200
1850
1450
1250
345kV to 500kV Station Post Insulators
A30 Porcelain
Insulators
A20 Porcelain
Insulators
TR#
Voltage
(kV)
BIL
(kV)
Height
(In.)
Cantilever
(lbs.)
TR324
TR367
TR368
TR369
TR330
TR371
TR372
TR373
TR379
TR391
345
345
345
345
345
345
345
345
500
500
1300
1300
1300
1300
1470
1470
1470
1470
1550
1800
106
106
106
106
122
122
122
122
128
152
1000
1450
2000
2050
900
1170
1750
1750
1700
1400
Top BHC Bottom BHC
(In.)
(In.)
5
5
7
5
5
5
7
5
5
5
5
7
7
7
5
7
7
7
7
7
Porcelain Standoff Insulators
These Porcelain Standoff Insulators are made from
the highest quality wet process electrical porcelain.
The inserts are brass and are held in place with portland
cement. All insulators are tested electrically after assembly.
Porcelain Standoff Insulators for OEM & Utility Applications
Meister Intl
Part Number
MI-70100
MI-70105
MI-70110
MI-70125
MI-70130
MI-70135
MI-70140
MI-70145
MI-70150
MI-70151
MI-70152
MI-70155
MI-70160
MI-70165
MI-70169
MI-70170
MI-70174
MI-70175
MI-70176
MI-70190
MI-70195
MI-70200
MI-70205
MI-70210
MI-70214
MI-70215
Dimensions (Inches)
Diameter
Height
2
2
2
2 1/2
2 1/2
2 1/2
2 1/2
2 3/4
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/2
3 1/2
3 1/2
4
4
4
4
STRENGTH RATING IN LBS.
Insert Thread
Each End
Minimum
Creep (Inches)
Strike
(Inches)
Voltage (kV)
Rating
BIL
kV
3/8" - 16
3/8" - 16
3/8" - 16
3/8" - 16
3/8" - 16
3/8" - 16
3/8" - 16
3/8" - 16
1/2" - 13
3/8" - 16
3/8" - 16
3/8" - 16
1/2" - 13
1/2" - 13
3/8" - 16
1/2" - 13
3/8" - 16
3/8" - 16
1/2" - 13
1/2" - 13
1/2" - 13
1/2" - 13
1/2" - 13
1/2" - 13
3/8" - 16
1/2" - 13
3
4 1/2
7
4 1/2
7
7 1/2
10 1/2
5
4
4
4
5
5
6
7 1/4
7 1/4
10 5/8
10 5/8
10 5/8
6 1/4
6 1/2
4
7 5/8
9 1/4
12 3/8
12 3/8
2 1/2
3 1/2
5 1/8
3
4
5
6
3 1/8
2 5/8
2 5/8
2 5/8
3 3/8
3 3/8
4
5
5
6
6
6
3 1/2
4 1/2
3 1/4
3 15/16
4 5/8
6
6
2.5
5
8.7
5
8.7
8.7
15
5
5
5
5
5
5
7.5
8.7
8.7
15
15
15
7.5
8.7
5
8.7
8.7
15
15
45
75
95
60
75
95
110
60
60
60
60
60
60
75
95
95
110
110
110
75
95
60
75
95
110
110
2 1/2
3 1/2
5 1/8
3
4
5
6
3 1/8
2 5/8
2 5/8
2 5/8
3 3/8
3 3/8
4
5
5
6
6
6
3 1/2
4 1/2
3 1/4
3 15/16
4 5/8
6
6
Cantilever
5/8" above top
550
350
225
425
425
300
225
500
525
525
525
515
515
510
275
275
260
260
260
700
400
800
750
575
375
375
Tension
Compression
1375
1400
1600
1775
1775
1700
1850
1900
1800
1800
1800
1925
1925
2000
1725
1725
1600
1600
1600
2400
1725
2750
2350
1900
2000
2000
6500
6500
6500
8000
8000
8000
8000
8500
10000
10000
10000
10000
10000
10000
10000
10000
8000
8700
8000
12000
12000
15000
20000
20000
20000
20000
Guy Strain Insulators
D
B
ANSI Class
C
A
L
54-1
54-2
54-3
54-4
DIM. L DIM. A DIM. B DIM. C DIM. D DIM. E
3 1/2"
4 1/4"
5 1/2"
6 3/4"
1 3/4"
2 1/4"
3 1/8"
2 5/8"
3 1/8"
1 3/4"
2 1/4"
4 1/8"
3"
1 1/2"
9/16"
FIG. 1
2 1/2"
2 7/8"
3 3/8"
3 1/2"
5/8"
7/8"
1"
1"
1 3/4"
2 1/8"
2 3/8"
2 3/8"
Maximum Cable Size
Ultimate Strength
3/8"
1/2"
5/8"
5/8"
10000 lbs.
12000 lbs.
20000 lbs.
20000 lbs.
E
Spool Insulators
7/16" R
2 1/2"
3"
4 1/16"
4 1/2"
2 1/8"
11/16" R
11/16"
FIG. 2
3" 5/8" R
11/16"
3"
ANSI
Class
FIG.
No.
53-1
53-2
53-3
53-4
53-5
1
2
3
Low Frequency
Ultimate Low Frequency Flashover kV
Flashover
kV
Strength
Wet
Dry
VERT. HORZ.
Approx.
Weight
Per 100
2000 lbs.
3000 lbs.
4000 lbs.
4500 lbs.
6000 lbs.
50 lbs.
118 lbs.
134 lbs.
250 lbs.
258 lbs.
20
25
25
25
35
8
12
12
12
18
10
15
15
15
25
FIG. 3
Visit www.meisterintl.com for more information.
Porcelain Bushings from 1.2kV
to 46kV (up to 8000 Amps)
for the Transformer, Switchgear
and Utility Industries.
Power Resistors for Dynamic
Braking, Neutral Grounding,
Motor Control, Harmonic
Filtering and Loadbanks.
Switchgear Insulators and
Bus Boots...
Custom Designs Welcome!
Visit web site for drawings and data sheets.
Reliable, Trustworthy Service • Short Leadtimes • Stocking Programs Available
Centrally located in the Cincinnati, Ohio area, Meister International is located within a one day transit
time of two-thirds of the US population. Most porcelain insulators are in stock for immediate shipment.
Stocking programs are available in order to guarantee continuous product supply of standard and
custom insulators.
Visit www.meisterintl.com to learn more about our complete offering of custom insulators, bushing
assemblies, power resistors, and bus boots.
PO Box 338 • Ross, Ohio 45061 USA
Tel: 513-923-2712 • Fax: 513-923-1978 • Email: sales@meisterintl.com
www.meisterintl.com