Porcelain Line-Post Insulators

The porcelain A30 bus insulators supplied by Meister International are designed for applications that have high mechanical stresses, and are cantilever tested to guarantee that they meet industry standards. This ensures high quality, dependability, and safety, plus our high standards keep your production process running smoothly.

Meister International stocks A30 porcelain bus insulators for the following voltage classes:
• 5kv
• 7.2kv
• 15kv/95kv BIL
• 15kv/110kv BIL
• 23kv/150kv BIL
• 34.5kv/200kv BIL

Porcelain A30 bus insulators (also referred to as bus bar insulators and bus supports) are utilized for high voltage applications where reliability and maximum “uptime” is paramount. Switchgear, power transformer, and bus-duct manufacturers use porcelain A30 bus insulators where high cantilever strength is necessary. Porcelain A30 bus insulators have a six-inch (6”) diameter to meet higher mechanical requirements. The high cantilever strength ratings meet the demands of industrial and utility customers around the world.

Porcelain A30 bus insulators are typically used to support long and short copper bus-bars. Ease of installation is key and Meister International supplies porcelain A30 bus insulators with hot-dipped galvanized inserts, further reducing the amount of potential downtime. The porcelain A30 bus insulators supplied by Meister International adhere to both the mechanical and electrical requirements of IEEE, IEC, NEMA and ANSI Standards. Testing is also performed in accordance with the applicable industry standards.

The glaze coating on the exterior of the porcelain A30 bus insulators supplied by Meister International keeps dirt and pollutants from adhering to the insulator, making maintenance of porcelain A30 bus insulators unnecessary. The inserts are made from metals that will not oxidize or otherwise deteriorate, and are ideal for supporting copper and aluminum bus-bars.

Meister International maintains an extensive stock of industry standard porcelain A30 bus insulators to help customers avoid long lead times. Due to the high quality of porcelain A30 bus insulators, production time can be lengthy, but Meister International offers stocking agreements that enable your production process to run without interruptions. Typically, porcelain A30 bus insulators can be shipped within 24 hours from receipt of order.

For additional information on Meister International’s products, including A30 bus insulators and bus bar insulators, please contact us by phone at 513.923.2712, or via email at sales@ meisterintl.com.

Indoor Bus Insulators

Data Sheet

A30 Drawings 

A30-1 5KV

A30-2 7.2KV

A30-3 15kvL

A30-4 15kvH

A30-5 23KV

A30-6 34.5KV

Meister International supplies the highest-quality porcelain A20 bus insulators. Porcelain A20 bus insulators are used by switchgear, power transformer and bus duct manufacturers where reliability and ‘uptime’ is paramount. Porcelain A20 bus insulators typically have high mechanical stresses placed on them, and our A20 bus insulators meet all industry standards

A20 porcelain bus insulators are offered for the following voltage classes:
• 5kv
• 7.2kv
• 15kv/95kv BIL
• 15kv/110kv BIL
• 18kv/125kv BIL

Porcelain A20 bus insulators are typically used to support copper bus-bars, and are commonly used in high-voltage switching applications. Meister International supplies porcelain A20 bus insulators that have aluminum inserts to for durability and ease of installation.

The design of porcelain A20 bus insulators takes into account both the mechanical and electrical requirements of IEEE, IEC, NEMA and ANSI Standards. Our A20 porcelain bus insulators are cantilever tested and additional testing is performed to ensure our products perform in accordance with the applicable industry standards.

Maintenance of porcelain A20 bus insulators is not required. The glaze coating on the exterior of the insulator keeps dirt and pollutants from adhering. The aluminum inserts are ideal for supporting copper bus-bars without corrosion.

Meister International helps customers avoid long leadtimes by stocking industry standard A20 porcelain bus insulators. Stocking agreements are offered so that your production process can run without interruption. Meister International’s porcelain A20 bus insulators can usually be shipped within 24 hours from receipt of order.

For additional information on Meister International’s products, including A20 bus insulators and bus bar insulators, please contact us by phone at 513.923.2712 or by email at sales@meisterintl.com

Indoor Bus Insulators

Data Sheet

A20 Drawings

A20-1 5kv

A20-1A 5kv

A20-2 7.2kv

A20-2A 7.2kv

A20-3 15kvL

A20-4 15kvH

A20-5 8.5" H, 18kv

Learning Tools

Insulators 101 Presentation [Download]

In addition to offering the highest-quality porcelain A20 & A30 bus insulators, Meister International supplies high-strength porcelain bus insulators where higher mechanical strength is required. These high-strength porcelain bus insulators are used by switchgear, power transformer and bus duct manufacturers where reliability and ‘uptime’ is paramount.

High strength porcelain bus insulators are offered for the following voltage classes:

• 15kv/110kv BIL

• 25kv/125kv BIL

• 24-34.5kv/150kv BIL

High-strength porcelain bus insulators are used to support copper bus-bars and the insulators have hot-dipped galvanized steel inserts for durability and ease of installation.

For additional information on Meister International’s products, including the high-strength porcelain bus insulators, please contact us by phone at 513.923.2712 or by email at sales@meisterintl.com

High Strength Bus Insulator

Tech Sheet

High Strength Bus Insulator Drawings

15kv – 110kv BIL, P/N: MI-HSB110

25kv – 125kv BIL, P/N: MI-HSB125

24-34.5kv – 150kv BIL, P/N: MI-HSB150

The low voltage (LV) and high voltage (HV) pin type insulators distributed by Meister are designed and manufactured with both economy and the installer in mind. The pin type insulators Meister supplies can be installed quickly and conveniently. The insulator’s exterior is coated in a high-quality glaze, making sure to shed water and keep dirt and other pollutants from adhering. This allows for a requirement of little-to-no maintenance. Any metal used in the manufacture of the post will not corrode or deteriorate.

Pin type insulators are composed into a shape that allows the wire and its physical support to be separated, while securing the conductor to itself. This can be accomplished by tying the conductor and indicator together, by creating an inductor with grooves to ensure it doesn’t slip, or, if heavy enough, gravity can hold the conductor in place.

Once you have decided which pin type insulator will work best to accommodate your needs, please click our “request a quote” link, and fill in the information required. One of our service representatives will be glad to assist you as soon as we receive your information. For additional information on Meister International easy-to-install pin type insulators, or any of the world-class porcelain insulators and bushings we offer, call 513.923.2712 or email us at sales@meisterintl.com.

LV & HV Pin Type Insulator Drawings

LV Pintype Insulators
HV Pintype Insulators

The Guy Strain Insulators distributed by Meister International are manufactured from wet process porcelain. This gives the guy strain insulators a smooth glaze allowing them to shed water, requiring little-to-no maintenance. The guy strains are there to stabilize and reinforce structures such as telephone poles, to keep them from pulling toward other poles. Guy strain insulators are compatible with preformed style guy grips. They are designed, manufactured and tested to meet requirements of current American National Standards Institute (ANSI) guidelines.

Both the spool insulators, as well as the guy strain insulators supplied by Meister International are manufactured from wet process porcelain. This process allows the spool insulators and the guy strain insulators to shed water and keep dirt away, thus requiring little-to-no maintenance. They are shaped like spinning spools, which allow them to hold wires in place, and keep them from slipping off. These spool insulators are designed, manufactured and tested to the spool insulator requirements of current ANSI guidelines.

Maintenance of spool insulators and guy strain insulators is typically not required, as the glaze coating on the exterior of the insulator keeps dirt and pollutants from adhering to the insulator.

Below are images of both the guy strain insulators, as well as spool insulators, and drawings are available for download, to the left, in order to provide you with more in-depth information.

Once you have decided which guy strain or spool insulator will work best to accommodate your needs, please click our “request a quote” link, and fill in the information required. One of our service representatives will be glad to assist you as soon as we receive your information. For additional information on Meister International easy-to-install guy strain insulators and spool insulators, or any of the world-class porcelain insulators and bushings we offer, call 513.923.2712 or email sales@meisterintl.com.

Spool & Guy Strain Insulator Drawings

Spool Insulators
Guy Strain Insulators

Meister International supplies porcelain standoff insulators from 2.5kv up to 15kv/110kv BIL. Porcelain standoff insulators are important components in various electrical applications and are used to isolate power sources from making contact with conductive surfaces. Typically, porcelain insulators are used to support copper and/or aluminum bus bar in switchboards, motor control centers and panel boards.

The design and testing of these porcelain standoff insulators complies with the mechanical and electrical requirements of industry standards.

The porcelain standoff insulators provided by Meister International offer consistent reliability and performance and are typically maintenance-free. These porcelain standoff insulators have a durable outer gray glaze coating that repels dust and dirt, preventing it from adhering to the porcelain standoff insulator and interfering with its overall performance.

Our porcelain standoff insulators are designed with brass inserts on each end of the porcelain standoff insulator with a center mounting hole in each insert. The brass inserts are held in place with Portland cement so that the inserts remain in place during high mechanical stresses as well as in high-temperature environments.

Meister International offers stocking agreements for these porcelain insulators to guarantee continuous product supply. This helps to avoid outages and downtime and keeps your production line moving. These stocking agreements enable us to maintain the appropriate quantity of porcelain standoff insulators so we can fill customer orders quickly. Because of our inventory, Meister International’s porcelain standoff insulators can typically be shipped within 24 hours from receipt of order. Call us with any questions at 513.923.2712 or email us at sales@meisterintl.com.

Standoff Insulators

Summary Table

Standoff Insulator Drawings

Meister International has been supplying the industry with porcelain station post insulators since 2003. Standard strength, high-strength, and extra high-strength station post insulators are available from stock or have a very short leadtime. Porcelain station post insulators are preferred by Utilities around the world as they maintenance-free and offer superior electrical and mechanical characteristics. Porcelain Station Post insulators are the ideal choice for high voltage switches and substation bus support applications.

Meister International maintains an extensive stock of industry-standard porcelain station post insulators that are typically available for next-day shipping. This helps customers avoid long lead times.

Strength Ratings:

Standard strength porcelain station post insulators are typically used in all standard high-voltage switch and bus applications. They meet or exceed all ANSI standards in both electrical and mechanical characteristics for their voltage class.

High strength porcelain station post insulators are used when an extra amount of mechanical strength is required for heavy-duty bus and switch projects. High-strength porcelain station post insulators have the same electrical ratings as the standard strength porcelain station post insulators. In applications where there are severe short circuits, high-strength porcelain station post insulators are often used. They meet or exceed all ANSI standards in both electrical and mechanical characteristics for their voltage class.

Extra-High strength porcelain station post insulators are used for projects that involve extremely heavy mechanical loads. They meet or exceed all ANSI standards in both electrical and mechanical characteristics for their voltage class.

Porcelain station post insulators are typically installed in the vertical position, but they can also be used horizontally. When installed horizontally, the working load strength of the station post insulators must be de-rated for 50% of the net weight of the unit. In other words, if you have a station post rated at 2,500 lbs. cantilever, the maximum recommended working load is 1,000 lbs.

For over 80 years, porcelain station post insulators have been the preferred insulator by designers, manufacturers, and packagers of power substations and switchyards for utility and industrial environments. Our porcelain station post insulators’ superior operating characteristics provide the strength and long life needed for reliable substation operation. Porcelain station post insulators from Meister International provide efficient and trouble-free service for operating voltages from 7.5kv to 1100kv.

Maintenance of porcelain station post insulators is really not required because the glaze coating on the exterior of the insulator keeps dirt and pollutants from adhering to the insulator. The metal fittings on the ends of our porcelain station post insulators are hot-dipped galvanized steel that will not deteriorate.

The design of our porcelain station post insulators takes into account both the mechanical and electrical requirements of IEEE, IEC, NEMA and ANSI Standards. Testing is also performed in accordance with the applicable industry standards.

Purchase station post insulators from Meister International with confidence. You’ll be assured a quality product, quick shipping and quantity discounts.

The Suspension insulators distributed by Meister International are of the highest quality porcelain insulators. They are manufactured from wet process porcelain, giving them the ability to shed water and dirt. This allows for little-to-no maintenance. The Suspension insulators are tested to meet American National Standards Institute (ANSI) requirements.

Meister International’s Suspension insulators are made to be more cost effective than pin type insulators when it comes to high voltage transmission. Suspension insulators are what originally made high voltage transmission possible, and consist of individual units designed to support a particular voltage.

Suspension Insulator Drawings

Suspension Insulators

Meister International now distributes switch post insulators specifically designed for outdoor in-line switches and distribution switches. These are also used for hook-stick operated disconnect switches and cabinet mounting of fuses.

These are manufactured and tested in accordance with the requirements of ANSI C29.9. The switch insulators are solid core with hot-dipped galvanized steel hardware on each end of the insulator.

The switch post insulators distributed by Meister International have two 3/8”-16 captive mounting bolts on a 2-1/4 inch bolt circle on each end. These switch post insulators are available with the studs in line with each other from end to end or 90 degrees opposed from end to end.