News & Blog

Jul 24, 2026

11kV Lightning Arrester Selection for Distribution Applications

Catalogs make it look simple: search for an 11kV lightning arrester, match the number on the feeder single-line diagram, done. Real selection runs in the...

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Jul 23, 2026

How to Specify an Isolating Disconnecting Switch for an Overhead Line

An outdoor isolating switch can satisfy an electrical schedule and still be difficult to install or operate on the intended pole. Mounting centres, conductor approach,...

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Jul 23, 2026

Polymer Insulators for Power Utilities | High-Voltage Insulation Solutions

As transmission and distribution networks continue to expand, polymer insulators are becoming an important choice for power utilities, EPC contractors, electrical distributors, and grid infrastructure...

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Jul 23, 2026

Gapless vs Gapped Surge Arresters: Selection Considerations for MV Systems

Two structural families cover almost every arrester a medium-voltage buyer will meet. The gapless surge arrester connects its zinc oxide varistor column straight between line...

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Jul 22, 2026

Switch Disconnectors: Isolation Duties, Limits and Specification Questions

A feeder may need to be opened during normal service and then isolated for maintenance. Those are two requirements, and a quotation for an ordinary...

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Jul 22, 2026

Horn Gap vs Rod Gap Arresters: Where Each Design Is Used

Before zinc oxide varistors existed, overhead lines were protected by air itself. A horn gap arrester stretched an arc between two diverging horns until it...

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