Gas testing device ZG 3.1.

The gas testing device is used to test the gas accumulated in the Buchholz relay. It can be installed either directly on the bleeding valve of the Buchholz relay or on the gas outlet tap of the gas sampling device. The Buchholz gas flows through two different chemical solutions and its colour reactions indicate the nature of the fault.

Use of the gas testing device is no substitute for a gas chromatographic analysis.

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