Circuit Breaker Operation Time (Off-Service) (GIS)

For measuring GIS operating times we recommend the Current Sensor Measurement (CSM) method. With this method, the ground connections on the grounding switch do not need to be removed and the GIS remains grounded on both sides. The operating time is measured via an inductive current change measurement using the parallel ground connection of the breaker. The current change that is measured through the ground connection is then used to determine the switch response times.

Expert recommends

CIBANO 500 + CB MC2 + Current Sensor

A current sensor (a Rogowski coil) is connected to the switchbay grounding switch. These sensors have a flexible design, can easily be installed on a multitude of different grounding switches and are ideal for on-site applications in GIS installations. The breaker remains grounded on both sides throughout the entire measurement.

CIBANO 500
3-in-1 test system for medium- and high-voltage circuit breakers
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CB MC2
Main contact module for CIBANO 500
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Benefits of this solution

Personnel safety

The safety of the test personnel can be increased when the test is performed with both sides of the breaker safely grounded. 

Decreased interferences

The CB MC2 connection modules decrease interferences as they are mounted close to the breaking elements with short cables offering minimized cable length for interferences from other live substation elements.

Minimized handling effort

The offered solution reduces overall test equipment weight by eliminating the need for long and heavy high-current cables and their cumbersome handling.

Literature
Safely Grounded! Timing measurements on gas-insulated switchgear (GIS) with grounding on both sides (207 KB)
OMICRON-Magazine-Article-01-2019-Optimized-Testing-ENU.pdf (1 MB)
A3-069-Renaudin-Nenning_CIGRECanada2017.pdf (410 KB)
PotM-02-2021 Medium Voltage Breaker Testing ENU (400 KB)
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Videos

GIS Timing Test with CIBANO 500 Current Sensor

State-of-the-art circuit breaker testing MV / HV

High-voltage circuit breaker testing with OMICRON's CIBANO 500 and CB MC2

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