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Seismic Requirements for Substations: Experience & New Standard in Chile

The Chilean transmission system’s response to a major earthquake exposed vulnerabilities, notably failure of conventional equipment, even located far from the epicenter. These failures underscored the need to re-evaluate seismic criteria then in effect. Read More >

Monitoring Systems for HV Surge Arresters

Demand for reliable operation of power systems has driven adoption of online monitoring technologies for critical equipment such as surge arresters. Read More >

Experience at Swedish DSOs with Composite Line Insulators (Video)

Deterioration of Polymeric Transformer Bushings: Experience in Malaysia

Specification, Selection & Life Management of Multi-Column High-Energy Arresters for HVAC & HVDC Systems (Video)

Proactive Bushing Management (Video)

Case Study of Partial Discharge & Commissioning Testing of Long (+20 km) 400 kV XLPE Cables

in HV/HP Testing

Even the most rigorous factory testing cannot guarantee that cables will be installed correctly or that they will not be damaged during transport or laying and future owners require commission tests before accepting ownership. Read More >
Procedures & Challenges When Dimensioning DC Insulators

in Insulators

Insulators require careful scrutiny since they show significantly different behavior under DC stress than under AC stress. Read More >
Evaluating Condition of Old Porcelain Cap & Pin Suspension Insulators

in Insulators

Many insulators in service are either reaching or have already crossed the threshold of their expected operational lifetime. Read More >
Failure of Transmission Line Insulators

in Insulators

It is unrealistic to expect that any network component can last forever without failing and it can therefore be assumed that some proportion of insulators will fail in service after a certain period of time. Read More >
Increasing Transformer Reliability by Proactive Bushing Fleet Management

in All Articles, Bushings

If a bushing fails, the typical result is extended downtime of a power transformer with not only heavy financial losses but also challenges imposed on the system operator to compensate for the lost unit. Read More >
PD Measurements for HVDC Cable Projects

in Cables & Accessories

For the first time ever, long land-based transmission links are being implemented with extruded cable systems at a nominal voltage of ±525 kV. Read More >
Applying Sheath Voltage Limiters to Protect HV Power Cables

in Arresters, Cables & Accessories, Utility Practice & Experience

If segmentation is used to interrupt induced sheath current, measures must be taken to limit voltage induced on the sheath during transient events. Read More >
Protección de terminales neutros de transformadores eléctricos en subestaciones de distribución

in Bujes, INMR Español, Mantenimiento

Read More >
Implementing a Compact 400 kV Line

in Utility Practice & Experience

Integration of renewable energy sources into the electrical system in Germany has required adapting and expanding the existing grid. Read More >

About us

INMR offers expert independent technical content for T&D engineers and professionals. Special emphasis is on design, operation and maintenance of overhead lines, substations and power cable networks as well as on testing and certification of key components such as insulators, surge arresters, bushings, power cables and cable accessories, and more.

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This Week

Seismic Requirements for Substations: Experience & New Standard in Chile

Monitoring Systems for HV Surge Arresters

Experience at Swedish DSOs with Composite Line Insulators (Video)

Deterioration of Polymeric Transformer Bushings: Experience in Malaysia

Specification, Selection & Life Management of Multi-Column High-Energy Arresters for HVAC & HVDC Systems (Video)

Proactive Bushing Management (Video)

Featured Content

Case Study of Partial Discharge & Commissioning Testing of Long (+20 km) 400 kV XLPE Cables

Procedures & Challenges When Dimensioning DC Insulators

Evaluating Condition of Old Porcelain Cap & Pin Suspension Insulators

Failure of Transmission Line Insulators

Increasing Transformer Reliability by Proactive Bushing Fleet Management

PD Measurements for HVDC Cable Projects

Applying Sheath Voltage Limiters to Protect HV Power Cables

Protección de terminales neutros de transformadores eléctricos en subestaciones de distribución

Implementing a Compact 400 kV Line

About us

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