Transformer Protection Relays (Buchholz Principle) - EMB Gmbh
Transformer Protection Relays (Buchholz Principle) - EMB Gmbh
Transformer Protection Relays (Buchholz Principle) - EMB Gmbh
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4. Tests<br />
Each <strong>Buchholz</strong> relay is provided with a works-number that is specified on the test certificate and<br />
the name plate. The tests carried out on the <strong>Buchholz</strong> relay are recorded in the test certificate.<br />
- Dielectric strength test<br />
- Leakage test<br />
- Functional test<br />
- Flow test.<br />
<strong>Buchholz</strong> relays are delivered in cardboard boxes.<br />
For each relay delivered the following documents in the language agreed are proviced:<br />
- Operating instructions<br />
- Test certificate.<br />
The name plate covers the following information:<br />
Type<br />
works-no.<br />
6 digits<br />
switching IP code<br />
element<br />
S = normally-open<br />
Ö = normally-closed<br />
W = changed-over<br />
Figure 11 - Functional and leakage test<br />
date of manufacture<br />
(week/year)<br />
type code<br />
Figure 12 - Flow test<br />
9
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