Offline Gas-Insulated Switchgear Testing

Visual inspections are among the most used test methods worldwide. These inspection tasks usually…

Voltage withstand test voltages are primarily sinusoidal AC voltages above rated voltage.…

Partial discharge measurement is one of the most important tools for GIS insulation condition…

For measuring GIS operating times we recommend the Current Sensor Measurement (CSM) method. With…

In-service testing methods First trip and Voltage Based Timing (VTM) show degradation accumulated…

The static contact resistance belongs to the most important tests on circuit breakers. The test…

During dynamic contact resistance measurements, the contact resistance traces are recorded while the…

This measurement can be applied with circuit breakers equipped with a spring energy storage system…

The motion or contact travel measurement verifies the operating mechanism and the mechanical linkage…

During coil current measurement, the current signature curve of the command coils is being recorded…

The Overcurrent Release Test is used to determine the current which trips the breaker. Overcurrent…

Circuit Breakers are equipped with an Under-voltage release if the related protection system has no…

Measuring the power factor, or the dissipation factor, also known as the tangent delta (tan δ),…

Current transformers integrated in GIS can be difficult to test as they are sealed within its steel…