MR MESSKO MSAFE, Operating Instructions Manual

Page: 35 / 60

6 Commissioning
35 7232312/00 EN
Prior to commissioning the transformer, vent the Buchholz relay and perform
the checks listed in the following. If anything is unclear regarding the checks
or troubleshooting, please contact Messko GmbH [
► Section 1.1, Page 5].
6.1 Venting the Buchholz relay
WARNING
Danger of explosion and danger of poisoning!
Explosive gases in the Buchholz relay can deflagrate or ex-
plode and result in death or severe injuries. Inhaling the gases
released can lead to poisoning or suffocation.
► Ensure that there are no ignition sources such as naked flames, hot sur-
faces or sparks (e.g. caused by the build-up of static charge, electrical
devices) in the immediate surroundings and that none occur.
► Do not breath in any gas released.
ü
The pipes are filled with insulating fluid.
ü The stop valve to the oil conservator is open.
1. Remove the locking cap (open-end wrench, wrench size 14).
2. Open the gas extraction valve.
3. Close the gas extraction valve as soon as insulating fluid begins to es-
cape.
ð
The Buchholz relay has been vented.
4. Position the locking cap on the gas extraction valve, screw on hand-tight
and then tighten with max. one half turn (open-end wrench, wrench size
14).
6.2 Leak test
ü The pipes are filled with insulating fluid.
1. Check the tightness of the flange connection.
2. If the connection is not tight, check the gasket and replace it if necessary.
ð The test is complete.