Importers, Exporters, Engineering Works, Manufacturers Representative & Commission Agent
No. 1 Kim Keat Lane Singapore 328858 Tel: +(65) 6250 5676 Fax: +(65) 6252 9890
P & B Buchholz Relays
P&B has been a leading manufacturer of Transformer protection relays of the Buchholz principle for over 60 years. Most faults in an oil filled Transformer are accompanied by the generation of gas. By using a suitable relay the formation of this gas can be used as a warning of a developing fault.
Products have been designed, tested and manufactured to meet the detailed requirements of British Standard BEBS T2, Eskom and DIN specifications.
P&B were also privileged to be represented on the technical committee responsible for preparation of the harmonised European specification EN 50 216, which relays also comply to.
A vast range of standard products is available, whilst we are happy to provide units to your specific requirements e.g. fixings, flanges, conduit entry, calibration, finish etc.
The Dry Air Pump provides a portable solution for on-site testing of Gas and Oil operated Buchholz relays.
A charge of air is created in the polycarbonate cylinder by means of a foot operated pump. The cylinder contains an indicating silica gel, which absorbs the moisture present in the air. The pressure of the air charge is monitored on the built-in pressure gauge. When a suitable pressure has been attained the air charge is then quickly passed to the Buchholz via a flexible tube, by opening the ballvalve fitted to the cylinder. To prevent backpressure forcing oil back the flexible pipe a non-return valve is incorporated in the unit.
The indicating silica gel is a crystalline material, which absorbs moisture readily. The properties of the crystals can easily be regenerated by heating/drying. The crystals are impregnated with iron compounds, which gives them an orange colour. Upon absorption of moisture these crystals change from their orange colour to a pale yellow and then become colourless. When the crystals change to pale yellow they should be regenerated.
DRY AIR PUMP
§ Max. operating pressure 60 psig
§ Self contained in a rugged steel case with carrying handle
§ Supplied with 7m long hose and fittings
§ Size: 475 x 250 x 128mm
West Asia Trading & Engineering Pte Ltd
No. 1 Kim Keat Lane
Tel: +(65) 6250 5676
Fax: +(65) 6252 9890