0000004724 00000 n The relay is located in an inclined pipe between the transformer and its oil hX*I7,Y`P&/a7MG2#,QS4KqKRV\EntH3-hG8XPl%EN)UZ'VZ%aK^YbA0eO8qe&irT It is used for the protection of a Transformer from the faults occurring inside the transformer. i&a&P\elcV6Q=$Z[c9>@'ZnmFe4,Q-s@$t^6qnG$u9S^)$1l;q=/BF BUCHHOLZ RELAYS APPLICATION Buchholz Relay is a protection device for monitoring the gas and oil movements in oil immersed transformers. The Buchholz gas sampler is used for taking gas samples from the Buchholz relay of transformers. (CB3A��i � Ą10D�1�s �d�p�#��(�-��#�#� F�f��\�r�*���[�A�A�E��?�#���9HȒ���lE�"A,����S�|��|S���(-� d1ATz���l����� +��Q �.•��Q �&O������M� �"�� endstream endobj 331 0 obj 431 endobj 309 0 obj << /Type /Page /Parent 303 0 R /Resources << /Font << /F0 311 0 R /F1 313 0 R >> /XObject << /im1 328 0 R >> /ProcSet 329 0 R >> /Contents 314 0 R /MediaBox [ 0 0 595 842 ] /CropBox [ 0 0 595 842 ] /Rotate 0 >> endobj 310 0 obj << /Type /FontDescriptor /FontName /GJHIFO+Arial /Flags 32 /FontBBox [ -250 -212 1190 1000 ] /MissingWidth 272 /StemV 80 /StemH 80 /ItalicAngle 0 /CapHeight 905 /XHeight 453 /Ascent 905 /Descent -212 /Leading 150 /MaxWidth 992 /AvgWidth 441 /FontFile2 321 0 R >> endobj 311 0 obj << /Type /Font /Subtype /TrueType /Name /F0 /BaseFont /GJHIFO+Arial /FirstChar 32 /LastChar 255 /Widths [ 278 278 355 556 556 889 667 191 333 333 389 584 278 333 278 278 556 556 556 556 556 556 556 556 556 556 278 278 584 584 584 556 1015 667 667 722 722 667 611 778 722 278 500 667 556 833 722 778 667 778 722 667 611 722 667 944 667 667 611 278 278 278 469 556 333 556 556 500 556 556 278 556 556 222 222 500 222 833 556 556 556 556 333 500 278 556 500 722 500 500 500 334 260 334 584 750 556 750 222 556 333 1000 556 556 333 1000 667 333 1000 750 611 750 750 222 222 333 333 350 556 1000 333 1000 500 333 944 750 500 667 278 333 556 556 556 556 260 556 333 737 370 556 584 333 737 552 400 549 333 333 333 576 537 278 333 333 365 556 834 834 834 611 667 667 667 667 667 667 1000 722 667 667 667 667 278 278 278 278 722 722 778 778 778 778 778 584 778 722 722 722 722 667 667 611 556 556 556 556 556 556 889 500 556 556 556 556 278 278 278 278 556 556 556 556 556 556 556 549 611 556 556 556 556 500 556 500 ] /Encoding /WinAnsiEncoding /FontDescriptor 310 0 R >> endobj 312 0 obj << /Type /FontDescriptor /FontName /HJHIFO+Arial,Bold /Flags 16416 /FontBBox [ -250 -212 1201 1000 ] /MissingWidth 333 /StemV 153 /StemH 153 /ItalicAngle 0 /CapHeight 905 /XHeight 453 /Ascent 905 /Descent -212 /Leading 150 /MaxWidth 1001 /AvgWidth 479 /FontFile2 324 0 R >> endobj 313 0 obj << /Type /Font /Subtype /TrueType /Name /F1 /BaseFont /HJHIFO+Arial,Bold /FirstChar 32 /LastChar 255 /Widths [ 278 333 474 556 556 889 722 238 333 333 389 584 278 333 278 278 556 556 556 556 556 556 556 556 556 556 333 333 584 584 584 611 975 722 722 722 722 667 611 778 722 278 556 722 611 833 722 778 667 778 722 667 611 722 667 944 667 667 611 333 278 333 584 556 333 556 611 556 611 556 333 611 611 278 278 556 278 889 611 611 611 611 389 556 333 611 556 778 556 556 500 389 280 389 584 750 556 750 278 556 500 1000 556 556 333 1000 667 333 1000 750 611 750 750 278 278 500 500 350 556 1000 333 1000 556 333 944 750 500 667 278 333 556 556 556 556 280 556 333 737 370 556 584 333 737 552 400 549 333 333 333 576 556 278 333 333 365 556 834 834 834 611 722 722 722 722 722 722 1000 722 667 667 667 667 278 278 278 278 722 722 778 778 778 778 778 584 778 722 722 722 722 667 667 611 556 556 556 556 556 556 889 556 556 556 556 556 278 278 278 278 611 611 611 611 611 611 611 549 611 611 611 611 611 556 611 556 ] /Encoding /WinAnsiEncoding /FontDescriptor 312 0 R >> endobj 314 0 obj [ 316 0 R 318 0 R ] endobj 315 0 obj 650 endobj 316 0 obj << /Length 315 0 R /Filter [ /ASCII85Decode /FlateDecode ] >> stream Buchholz relay is a gas actuated protection relay which is generally used in large oil immersed transformers of rating more than 500 kVA. The Buchholz relay also takes over the function of an oil level indicator when there is not enough oil in the conservator or when there is an oil leak. 8;W=k9lJc?%#07_rWA59_(7%WqWMd5\t(`eR=SXe.>joqd5G[MXabiMLRggh2T#dS j�������}sQ�����Qa�������w�"�#�#���y]���L�̀�Q����C ��U�z���]z3���Zo���;��H}��R_�';l�ꎚ���h����۱ȱ�)��������3�Y�������3�$���a�~��QۨgM�����Pc�1Řa�6�F���H7v����Y�q����z�������k˭��._�4���m��f�����j~n�7g���"��w�[%VQ �S��i*��e�rNS��r��ݹ7���l�l�l��89����8)0A�ի�t]qj�8��۾�4XqZ�8����^��rNU�:��W��:��q�_é[9�8#�XW���tYqjW�)�58��8Q>��856�Q�B̿�]̞�83֜kZV��ӤRN%ׁqB��KT}WQ+m��n%(=�t-7)n\ܨ�a����Y'�l+�:[�f-�[�V�:Z�)ַ� K�����k���? Smoking and handling of spark emitting or spark causing tools is forbidden. The body and the cap of our Buchholz Relay are made of aluminium alloy casting making it low weight and small in size without reducing the functionality of the relay. Named afteri ts inventor mr. Max Buchholz (1875–1956) in 1921, relay is used to produce an alarm in case of incipient (i.e.slow-developing) faults in the transformer and to disconnect the transformer from the supply in the event of … Internal gas accumulation and oil flow are monitored and kept under control by the Buchholz relay. The gas actuated protective relay is designed to ... Read more Buchholz Relay – Construction and Working Principle During normal transformer operation the relay allows oil flow between the conservator and the main tank and it is filled with oil. The Buchholz relays Series RR can be supplied with a gas sampling tap on the lower part f the o body as well as on the head of the relay; this disposition allows an easier sampling when the minimum oil level in the conservator is only slightly higher than the relay head. Vdl]IZY$LNk8pr@dWiTVQV=dO@!jPZf_=+pRhS8#'K.FqU6/%dRXV(9s+^t7aJdb]tE6Rq?H4f! � �dQSS�@��N Buchholz relay is a special type of relay which is widely used for internal protection of a transformer. endstream endobj startxref Highly stable and resistant and will not operate due to oil pump operation. o�TN㍼�7����x;����λx7�ὼ���>ȇ�0�>���8���|�O�>���. Buchholz Relays are manufactured to allow both thread and flange connections. ^i��b��M����y���\���5C'l�d�S"��nv��Fh��M�(|bW-��P~O��:::�:: A��0�3\F! The following are some major applications of the relay which is famous for its unique nature. The BR saves the transformer when there is major fault in active parts. Buchholz relay specification. Comem eBR Buchholz relay is an innovative evolution of our standard device. 1) The main body of the relay is fitted with tempered glass inspection windows with graduated scale markings in cubic centimetres to indicate the internal volume. A Buchholz relay is used to monitor large transformers for oil loss or insulation breakdown. can generate gas and affect transformer performance. The oil drain plug is located at the bottom of the main body. %PDF-1.4 %���� It is a type of oil and gas actuated protection relay. a. It remains one of the most important protection devices, monitoring oil and gas levels within the machine. PDF: Full catalogue: Order form: Product description. l Worldwide acceptance. The Buchholz relay has the function of collecting and keeping the gas in its interior, and then sending an alarm and/or a trip signal to the transformer. Buchholz relays Transformer outages have a considerable economic impact on the operation of a power supply network. ª���y��7�k��n��4�t#���X�U1��9{�T�{`3c�1_^*)����q,�6���:���l�������S��"���F|< a)hoӀ�5zO�t7w�;gq�smC���#��������c�⡂+C-�s�I�8�a�vW>. 0000000871 00000 n In electric power distribution and transmission, a Buchholz relay is a safety device mounted on some oil-filled power transformers and reactors, equipped with an external overhead oil reservoir called a "conservator".. Buchholz relay Gas accumulation and oil flow monitoring A buchholz relay is a fundamental device for transformers, it keeps internal gas accumulation and oil flow monitored and under control. d. Vibration proof to 4M4 vibration as specified by EN60721 b. Buchholz relay in a transformer is an oil container housing the connecting pipe from the main tank to the conservator tank.It has mainly two elements. The Buchholz Relay is very important protective device in oil filled Transformer. Buchholz relay.pdf - Free download as PDF File (.pdf), Text File (.txt) or read online for free. 0000055783 00000 n Two-float Buchholz relays are used to protect larger transformers. Buchholz relays are used to protect transformers from … d. Vibration proof to 4M4 vibration as specified by EN60721 b. The new Comem Buchholz relay is an assembly of two machined aluminium alloy castings that effect a perfect oil seal. 8;X`U9lC\2%/gA,+++KPQl1tJlWTQo%ZSCE8f>_SU>p="h]EZfC%HuU?rM_/J>RbOaY*^5k9"fYe>gI oO4j&tGi92N=! %%EOF It is installed between the conservator and main tank. 50 0 obj <> endobj Buchholz relay is a safety device which is generally used in large oil immersed transformers (rated more than 500 kVA). Transformer outages have a considerable economic impact on … A\r^p]+)>0HM:_Ue_QN/G8sS$4U'dP4PVP9n&$4cp&>"j0#C?~> endstream endobj 319 0 obj 51242 endobj 320 0 obj 23329 endobj 321 0 obj << /Filter /FlateDecode /Length 320 0 R /Length1 319 0 R >> stream 0000003614 00000 n 0000006433 00000 n The Buchholz relay is sited in the pipework between the transformer and its conservator and it is filled with oil during normal transformer operation. ��ވ�-L�\��2$a%�� ~����C�����������1� �#ǐ�|�0ġN Gqgp�p���q�� �q������{����!��PC"�(���H�Fr1�0��x|��H�DLP.5w�;vR(B1id'�Џ��~��վ�H�"U"_ZN+��i%��մ��R����L)�A�?i��6�f��%��Y����6�N;�2�A;)���U�j�FU'�E��դٴ���>�O� բ�HEա :D��.գ7)��P It is generally used on all oil immersed transformers having a rating more than 500 KVA. c. Immune to variations of angle as experienced in transformer mounting. 0000004763 00000 n 0000058801 00000 n A typical Buchhloz Relay is shown below. Buchholz relay is used for the protection of transformers from the faults occurring inside the transformer. The Buchholz relay is installed in the pipe between the tank of the device to be protected (transformer, reactor) and the conservator. 1.2 Operating principle The operation of the Buchholz relay is based upon the fact that every kind of fault in an oil-filled transformer causes a decomposition of … actuated Buchholz relay, as this device is the only means of detecting incipient faults, which if unnoticed, can cause heavy failures. Search Search The relay is located in an inclined pipe between the transformer and its oil Buchholz relays are used to protect transformers from … During normal transformer operation the relay allows oil flow between the conservator and the main tank and it is filled with oil. 0000001117 00000 n The response time of Buchholz relay is a bit too high. [`**i0&YSLBr].=hFkGjWj#4dk`mFD The Buchholz Relay is fitted in the pipework between the transformer itself and the conservator at a 2.5 to 5 degree angle. 0000005534 00000 n dRubg@-gH\.2]QbY=f3J@QW]9fp+[df0?G\p:%dpnE#FKFC+MnH*fgolP)b`(u? A Buchholz relay is a type of oil- and gas-actuated protection relay universally used on all oil-immersed transformers with a rating greater than 500 kVA – conservator type. Such type of relay is used in the transformer having the rating higher than 500KVA. The examples of the faults which could cause gas 102 0 obj <>stream A Buchholz relay is used to monitor large transformers for oil loss or insulation breakdown. 0000029955 00000 n eLW$@iIp"?qp0(^NZ2s(iI9eB=gZgeR&1T&=? 0000002199 00000 n P�ߗK�`�&��"�8-!ZSC=}������gn��3'p��Q��[�I�]M�z�J/b�8h�{� ���q���/Ў��[v:]�ѡ According to the history, this relay is named after Max Buchholz in 1921. The Buchholz relay is used as a protective device sensitive to the effects of dielectric failure inside the equipment. Buchholz relay is an important protection and monitoring device used to protect Large oil immersed transformers (generally rated above 750kVA), against incipient faults (slow developing faults) such as core heating, insulation failure of windings, fall of … a. It remains one of the most important protection devices, monitoring oil and gas levels within the machine. 0000005556 00000 n H��� PW��s�y�P1���=��ה-�`F�Tj5f�b��7ԉ[��H���Q�� � 5Ѽ�\Q��.tsA�JjƩ9]����Kwu��A *c$�u�Ѽ�oV�!�Geϰ�Ш�� ��y�F���2G�~�֢Ԁ��IO����6`����iyj���@�́������G�_���T�ET�����F����a��w�9� ���6���T�SD蘨 0000055804 00000 n Buchholz Relay is intended to work in a horizontal positions. The body and the cap of our Buchholz Relay are made of aluminium alloy casting making it low weight and small in size without reducing the functionality of the relay. Buchholz relays in South Africa By P De Matos, Allbro Where there is a power transformer, you will find a Buchholz relay. 0000029907 00000 n ŵm���%s��6�=�vWp�iE�W�2�ބ�F��K*]������Y��U�Z|1^�{���)����VL؊˖�}`��,[3�Zw��1ɽ�*6m��U��ʟ\0�Y �uM�z�Ѵ4c�^!�uL�8��D:��W����#��N����j��8�A(J�����-$��:��ŨK�ـ������=YF��c�*G@�!��]�$�Y��2���GF}���v�6�>.��Z��W5�@N��17j��� ��)"Q�u����p(� �J�i�8g�����{�[@?=�Y�����������2�.�1�- �5��t�`�4�=���Ԁ�+� An overview of the advantages of the MSafe. As an esteemed name in the relevant industry, we are trading and supplying a commendable array of Buchholz Relay that is used for protection of oil immersed transformers. Basically, it is an oil actuated relay. The Buchholz relays Series RR can be supplied with a gas sampling tap on the lower part f the o body as well as on the head of the relay; this disposition allows an easier sampling when the minimum oil level in the conservator is only slightly higher than the relay head. It is qualified as TXpert Ready Sensor to connect with CoreTec TM 4, the TXpert Hub.. !- When gas is generated in the transformer it rises towards the conservator and collects in the upper chamber of the relay. �|}�����Ј�oJ�M�DE���ltf�Z�G ���} ��P�$gPl�ۖ�Z�����*ϣ���c�4�����P>��#�E"z�e�PܝZ�;ЦPIIIY�*�ʆ*��*��U�q)a�h"-�DJ#���⸸*IJYA� 2VΖ���rW����|�N�!�]��W�����ikC�-Z��M�k+�$-U;�]� Buchholz relays in South Africa By P De Matos, Allbro Where there is a power transformer, you will find a Buchholz relay. ]cn`&:5Z1CbSk@g86@f 0000001901 00000 n "R~> endstream endobj 317 0 obj 778 endobj 318 0 obj << /Length 317 0 R /Filter [ /ASCII85Decode /FlateDecode ] >> stream Applications of Buchholz Relay. During normal operation it is filled completely with insulating liquid. Buchholz relays Gas sampling device The presence of gas inside an oil insulated transformer is a clear sign of malfunctioning. Protective relays for transformer > Buchholz relay: Protective relays for transformer LINEUP: Buchholz relay: This product functions as both a gas detector and a protective relay. Transformer is an expensive and one of the most important electrical machines. 1 second is minimum operation time of this relay. They have separate switching elements for warning and switch-off. 306 0 obj << /Linearized 1 /O 309 /H [ 1117 547 ] /L 828160 /E 59108 /N 18 /T 821921 >> endobj xref 306 26 0000000016 00000 n !���� )/V 4>> endobj 52 0 obj <>/OCProperties<>/OCGs[75 0 R 76 0 R 77 0 R 78 0 R]>>/Outlines 37 0 R/Pages 48 0 R/Type/Catalog>> endobj 53 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/Properties<>/XObject<>>>/Rotate 0/TrimBox[0.0 0.0 595.2756 841.8898]/Type/Page>> endobj 54 0 obj <>stream it is connected with a 5° positive angle to the horizontal axis with the arrow mark on the relay pointing to the oil conservator. Buchholz relay is a gas actuated relay. A Buchholz relay trip generally indicates Buchholz Relay Definition: The Buchholz relay protects the transformer from internal faults.It is the gas actuated relay.The Buchholz relay is placed between the main tank and the conservator. ESKOM 240-56063908. The examples of the faults which could cause gas Search Search After gas has accumulated in the Buchholz relay, the transformer must be switched off and secured 0000006457 00000 n Buchholz Relay with Mercury Switches Buchholz Relay with Magnetic Switches l No use of mercury. &Cy�Y:G�)�.�E�SjH��1n�&]�/���7��W)���r�G����3zN/�� A Buchholz relay trip generally indicates A Buchholz relay is a type of oil- and gas-actuated protection relay universally used on all oil-immersed transformers with a rating greater than 500 kVA – conservator type. The details of the instrument will appear. The Buchholz relay also takes over the function of an oil level indicator when there is not enough oil in the conservator or when there is an oil leak. Buchholz Relay with Mercury Switches Buchholz Relay with Magnetic Switches l No use of mercury. Request PDF | Alternatives of Buchholz relay and more robust schemes for Transformer internal fault protection | Transformer is an expensive and one of the most important electrical machines. �%WK�F.j���_�M�FNs�C��j��4�^��A�@ػ�\�23F���@e���f��@㜠�i��U"�T��mjsj䑮)TbW �Yg�!p���b2���vG��������T����bz�ީJ��cT=O���}UP�%�6w�?z��^��c����%s����r)�nn�ܩ��2���!�{S� ��M���l������LÔS ��'7� endstream endobj 51 0 obj <>>>/EncryptMetadata false/Filter/Standard/Length 128/O(�,�6}椁4����E��n*�����v)/P -3900/R 4/StmF/StdCF/StrF/StdCF/U(�h3�. c. Immune to variations of angle as experienced in transformer mounting. This video is about operation and construction of Buchholz relay. l Worldwide acceptance. 0000004785 00000 n Scribd is the world's largest social reading and publishing site. �f��2$���2$h�Y���[��M� 0000055908 00000 n 0000029931 00000 n 0000006481 00000 n *Click the image of the desired instrument. P�k�N�I'9�(��t�N�)���� D�0�%+�J�Wy��Yɫx5�ᵜ��x='s Buchholz relay specification. %PDF-1.7 %���� Scribd is the world's largest social reading and publishing site. 0000000966 00000 n With the support of our vendors' experienced professionals, offered relay is manufactured using the supreme grade material and innovative technology. This relay is mainly used in oil immersed transformer for providing 6� ��DEzKT���xCT~���&�j&j��ԜZ�Z���#D]QO�)E}����!�ԒZ� j-��!\��h(�Ƣ�ȓ��wr��.g�9r�\(�%r�r�U2I��)2Un�[�N�G�G�qyZ����"��ySޑ�e�|(�G�x"��g�x! What is Buchholz Relay? Transformer outages have a considerable economic impact on … It is designed to detect the faults and minimize the propagation of any damage which might occur within oil circuit, induction coils etc. Buchholz relay is not provided in relays having rating below 500 kVA from the point of view of economic considerations. The float is attached to a hinge in such a way that it can move up and down depending upon the oil level in the Buchholz relay Container. Transformer is an expensive and one of the most important electrical machines. h�bbd```b``v������d�"Y�e��E��"l`R D�N����v0��7��op��׮��R� R�/X���^f��u����� �C �� %�30�}` �Y� It senses these faults and interrupts the transformer’s input supply, so that greater damages may be prevented. trailer << /Size 332 /Info 300 0 R /Root 307 0 R /Prev 821910 /ID[<4e9e65a9a77f47e257a4a296d73c5a59>] >> startxref 0 %%EOF 307 0 obj << /Pages 301 0 R /Type /Catalog /Metadata 305 0 R /AcroForm 308 0 R >> endobj 308 0 obj << /Fields [ ] /DR << /Font << /ZaDb 297 0 R /Helv 298 0 R >> /Encoding << /PDFDocEncoding 299 0 R >> >> /DA (/Helv 0 Tf 0 g ) >> endobj 330 0 obj << /S 437 /V 665 /Filter /FlateDecode /Length 331 0 R >> stream The Buchholz Relay is fitted in the pipework between the transformer itself and the conservator at a 2.5 to 5 degree angle. Buchholz relay is used for sensing the faults that occur inside the main tank of the tranformer such as the inter-turn faults, short circuits, earth faults, overheating of the core, oil leakage etc. Buchholz relay Gas accumulation and oil flow monitoring A buchholz relay is a fundamental device for transformers, it keeps internal gas accumulation and oil flow monitored and under control. Thanks to its digital interface, Comem eBR continuously monitors two crucial parameters to ensure correct transformer performance: gas accumulation and insulating fluid flow to … U��C a��dH�� /S����ʭ��s� g��o!���v�#օ3m�R�a7�� ���K��h�4�GrDX>Ԉ�O-b�(��0�� RK1 H�b``�b``�e`a`�re`@ Vv�8�0Wjժ�r�kY�Xn�2�Ncbcu�}��ǻ��4iǟ{����+d�f\@�"+��@ܨW*�=�:�FB+����.n~ηȭ�ण��&j1���c�)���[ܧe�� Short circuit faults such as inter turn faults, incipient winding faults, an… The upper element consists of a float. Buchholz relay is a type of oil and gas actuated protection relay universally used on all oil immersed transformers having rating more than 500 kVA. When gas is generated in the transformer it rises towards the conservator and collects in the upper chamber of the relay. Highly stable and resistant and will not operate due to oil pump operation. Buchholz relay purpose is important in electrical systems and especially in oil absorbed high rating transformers. ESKOM 240-56063908. BUCHHOLZ RELAYS APPLICATION Buchholz Relay is a protection device for monitoring the gas and oil movements in oil immersed transformers. Therefore, such relay can only be installed in the transformers equipped with conservator tanks.. Buchholz Relay Construction & Working Principle It is used for the protection of a transformer from the faults occurring inside the transformer, such as impulse breakdown of the insulating oil, insulation failure of turns etc. The Buchholz relay is sited in the pipework between the transformer and its conservator and it is filled with oil during normal transformer operation. in the Buchholz relay are combustible and can form explosive mixtures with air. The Buchholz Relay is very important protective device in oil filled Transformer.The BR saves the transformer when there is major fault in active parts. 0000001642 00000 n 0000003305 00000 n 74 0 obj <>/Encrypt 51 0 R/Filter/FlateDecode/ID[<5C38F2DB6609F9E7EABA08BCF3443B71>]/Index[50 53]/Info 49 0 R/Length 109/Prev 1531284/Root 52 0 R/Size 103/Type/XRef/W[1 3 1]>>stream Buchholz relay working principle and operation is base on the gases generated in the transformer tank during the internal fault, whenever fault generated in the tank, Bucholz relay operates and disconnects the transformer from supply or generates an alarm in case of an incipient fault. Introduction to Buchholz Relay. Bedienungsanleitung_Buchholzrelais.pdf: pdf Operating_Instructions_Buchholz_Relay_AE.pdf: pdf Operating_Instructions_Buchholz_Relay_CN.pdf 0000055931 00000 n 0000001664 00000 n PDF: Full catalogue: Order form: Product description. �����le�_q�����K�?x������d������)��)%V` 0 {��E9���d�͎Qj��8����sFe ���~�i�ܬ�Y��x�r�,���tlV-o���R-�!���`OOgO{O[OOkOO#��S���!��=w����Z�(w�{�{�[��}Ľʝ���~����v������9~{U ﵯ�/��h���Ծľ�~ܞbO��lo���:��� �J���Q������&}�]�״LS� Due to buoyancy the float of the single-float relay and both floats of the double-float relay are at their Buchholz relay.pdf - Free download as PDF File (.pdf), Text File (.txt) or read online for free. 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