Medium Voltage Switch

By | Blog, Electrical, Manufacturing, Social Posts

Switch Features

    • 5kV and 15kV voltage classes
    • 600A and 1200A continuous load interrupting ratings for 5kV and 15kV classes
    • 400A continuous and load interrupting ratings for 5kV
    • Manual and electrical operation
      • Indoor or outdoor non-walk-in enclosures
      • NEMA pads for cable lugs
      • Surge Arresters
      • Instrument transformer capabilities
    • Front Access – 36″W x 40″D small installation
    • 80kA and 100kA asymmetrical momentary switches available – 2000A to 4000A non-load break – torque lock

Construction Features:

  • Provisons for padlocking door
  • Inspection window
  • Foot-operated door stop
  • Door interlock safety barrier
  • Provisions for door and switch key interlocks
  • Switch interlock
  • Red-Green switch position indicators
  • Provisions for padlocking switch open or closed
  • NEMA 3R construction with sloped roof (optional NEMA 1 flat roof)
  • Optional 18″ (depth) rear extension to accomodate other cable directions
  • All 1200A 1/4 x 3 silver-plated bus 65-degree C rise – 61kA RMS – 95kV bil peak design – tin optional
  • 1/4 x 2 Silver-plated copper ground bus – fully grounded closure
  • Optional condesnation heaters
  • Conforms to UL – NEMA – CSA – ANSI/IEEE C37.20 standards
  • Acommodates all type fuses – fuse clips up to 300A
  • Other sizes are available

>> Download Medium Voltage Brochure <<

IER’s 5kV and 15kV Load Interrupter Switchgear has been constructed with an integrated assembly of switches, bus, and fuses designed for meidum voltage circuit protection. Our medium voltage Switchgear provides reliable, safe switching and fault protection for circuits rated from 2.4kV to 15kV. IER’s Switchgear is ideal for applications where high-duty cycle operation is not required.
The quick-make, quick-break mechanism carries full-load current-interrupting capabilityies while current-limiting fuses provide accurate, premanently calibrated short-circuit detection and interrupting capacities. Blade position visibility greatly improves safety by assuring electric circuit de-energization.

Switchracks – Strength in Support

By | Blog, Manufacturing
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IER offers custom Switchracks designed and built in-house to suit your needs with durability in mind throughout the entire manufacturing process. Our Switchracks are custom engineered and manufactured with galvanized I-Beams and C-Channel.

This particular Switchrack stands at a sturdy 13′ tall x 20 1/2′ long x 6′ wide, holds 1 P4 panel and 4 P1 panels in stainless steel but can be configured how you need it.

Custom Equipment Fabrication

By | Manufacturing

IER offers complete custom equipment fabrication services.

With in-house engineers and designers, complete sheet metal fabrication, on-site welders and powder coating services, IER can handle any custom equipment fabrication needs you require.

We can custom engineer and fabricate equipment for your specific needs with quick ship options available.

Versatility and flexibility have been the key reasons why IER has been manufacturing the highest quality custom fabricated equipment in the Houston area for over 10 years.

Our state of the art fabrication facility is eager to be your main source for unparalleled custom designed equipment.

Custom Switchboard Modification

By | Electrical, Manufacturing

IER provides cutom Switchboard modification including copper and enclosure adjustments.


Image shown was a Custom Switchboard modification – Adjusted the width from 60″ to 52″. To accomplish this, the enclosure and all of the horizontal copper had to be redesigned and replaced in a Quick-Ship time frame.

Modifications Available…

Stainless Steel: 304 or 316
Skid mount for mobile applications
Custom Metering Positions
Custom Utility Metering
Integrated Lighting Panels
Front and Rear Aligned
Rear Accessible Switchboard
Custom Buss-way Connections
Custom Transitions Sections: Panelboards, Transformers, MCC, VFD Systems, Custom Panels and more.

At IER, we take pride in the wide variety of work we do for our customers. Our projects range from custom design and fabrication to repairs and modification and so much more!