Nome file: buchholz relay testing device REV. 1 DTD 17/06/2008 Pagina 4 di 4
UNCONTROLLED COPY
REMOVAL OF TESTING DEVICE
A) Close the vent cock (black cock handle on horizontal position) on which the device is
connected (this will prevent oil leakage when joint 6 will be removed)
B) Unscrew joint 6 from the vent cock
C) Screw the protective plug (the one on the lower part of the relay) if it has previously
been used
D) Carefully open the upper vent cock to allow the exit of the gas inside the relay ; when
the relay is full, the oil will start to flow out from the cock: shut the cock
E) Screw the protective plug of the vent cock.
NOTES
F) In case of alarm test (partial emptying of of the relay ) the charge inside cartridge 4
doesn’t run completely out, the cartridge can be re-used for further alarm tests. In this
case, please keep the cartridge inside the testing device. The level of the charge can
easily be verified by opening the output cock 2 till some gas comes out. To perform a
new alarm test with the cartridge still on site, please start from point d) onwards. If the
cartridge is exhausted: open the output cock to run completely out of the possible
remaining charge, then unscrew cartridge 4 from its site and replace it starting from
point a).
G) In case of trip & alarm test (EE relays) the charge inside the cartridge is enough only
for one test. To perform a new test of both contacts (trip & alarm) open the output cock
2 to run completely out the remaining charge, unscrew the cartridge and proceed from
point a).
Summary of Contents for RG3.3
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