rev.1
DATE: 30/01/15 Pag. 2 of 2
Gas sampling off Buchholz relay
1. Open cock “11” located underneath the RG3 to drain oil and await until the gas collected in
the relay fills the device (you can observe this through the window).
2. Close the cocks “11” and “12” when the amount of gas needed for sampling is inside the
RG3.
Now the gas formerly accumulated in the Buchholz relay, due to some electrical failures inside the
transformer, may be drawn off for laboratory analysis or released by opening the cock “2”.
Test of ALARM and TRIP circuits
Alarm test
1. Cock “R” top of relay cover shall be open.
2. Unscrew the protective cap of cock “2”.
3. Connect a compressed air bottle, a pump for bicycle tires or our pneumatic test device
(supplied upon request – view booklet enclosed in this manual) to the cock “2.
4. Open cock “2” and inject air inside RG3 slowly until you get ALARM contact operation.
5. Close cock “2”
6. RESET TO OPERATION: the testing medium inflated in the system must be fully released
(i.e. until the RG3 is completely filled up again with oil) to reset the Buchholz relay to normal
operating conditions: open cock “2” keeping a cloth top of cock until oil leaks out and then
close the cock.
Trip test
1. Cock “R” top of relay cover and “T” underneath the body shall be open.
2. Unscrew the protective cap of cock “15”.
3. Connect a compressed air bottle, a pump for bicycle tires or our pneumatic test device
(supplied upon request – view booklet enclosed in this manual) to the cock “15.
4. Open cock “15” and inject air inside RG3 until you get TRIP contact operation.
5. Close cock “15” where pneumatic test device is connected torom leaking out when joint “6.
6. RESET TO OPERATION: the testing medium inflated in the system must be fully released
(i.e. until the RG3 is completely filled up again with oil) to reset the Buchholz relay to normal
operating conditions: open cock “2” keeping a cloth top of cock until oil leaks out and then
close the cock.
MAINTENANCE
No particular maintenance is required for this RG3. It is suggested only, on a regular basis, to
schedule inspections to verify the overall conditions of the device.
DISPOSAL
Disposal of all parts shall be made according to local environmental and waste management
regulations.
Refer also to the drawing 3619 in the following pages.
Содержание RG3.3
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