Nome file: buchholz relay testing device REV. 1 DTD 17/06/2008 Pagina 3 di 4
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f)
Open vent cock (black handle in vertical position)
g)
Hold the testing device by avoiding to touch cartridge 4 with hands (use a glove or a
cloth)
Since the testing device is under pressure the sudden exit of CO
2
from
the cartridge (gas expansion stage) make cool the metal outside surface of
the cartridge.
h)
Carefully open the output cock 2 of the testing device (turn it anti-clockwise) to check
alarm is working properly. Then, from the inspection window of the relay, verify the
progressive emptying of its upper part, and consequently, the corresponding oil level
lowering . As soon as the alarm is operated, close completely the output cock 2 (turn
it clockwise).
TRIP TEST (only for EE models, English standard)
EE models relays have a second cock on their lower part. Trip contact proper functioning
can be tested by connecting the test device to this cock.
Make sure that the cock is shut (black handle in horizontal position), then remove the
protective plug and screw at its place the joint 6 and re open the cock (black handle in
vertical position). Quickly open output cock 2 (fig.3). When the sudden gas injection
releases trip contact, close the output cock.
Fig.3
6
Summary of Contents for RG3.3
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