Tenders are hereby invited for the supply and delivery Buchholz relays for a period of 3 years at Rosherville. Specifications: - Relay, Buchholz: application: TRF; material: cast aluminium; type: BS25; nominal bore: 25 mm; flange: 75 mm; flange style: SQ; face to face length: 127 mm; pitch circle diameter: 72 mm with 4 tapped M10 holes; contact type: dual reed; contacts: 2 x trip and 2 x alarming; contact rating: 1 amp at 220 VDC; dielectric strength: 2KV for 1 min at 50 HZ; enclosure rating: IP65; temperature range: - 25 to 60 deg C; oil temperature range: -10 to 115 deg C; fastener type: stainless steel 304 with hexagon or allen key head; corrosion protection: c5m; specification: 240-56063908; sample point: for both gas release and oil sample point with 1/4" BSP female thread directly into the top casting of the relay x 50; - Relay, Buchholz: application: TRF; material: cast aluminium; type: BS50; nominal bore: 50 mm; flange: 140 mm; flange style: round; face to face length: 185 mm; pitch circle diameter: 110 mm with 6 M12 holes; contact type: dual reed; contacts: 2 x trip and 2 x alarming; contact rating: 1 amp at 220 VDC; dielectric strength: 2KV for 1 min at 50 HZ; enclosure rating: IP65; temperature range: - 25 to 60 deg C; oil temperature range: -10 to 115 deg C; fastener type: stainless steel 304 with hexagon or allen key head; corrosion protection: C5m; specification: 240-56063908; sample point: for both gas release and oil sample point with 1/4" BSP female thread directly into the top casting of the relay x 50; - Relay, Buchholz: application: TRF; material: cast aluminium; type: BS80; nominal bore: 80 mm; flange: 160 mm; flange style: round; face to face length: 185 mm; pitch circle diameter: 130 mm with 6 M12 holes; contact type: dual reed; contacts: 2 x trip and 2 x alarming; contact rating: 1 amp at 220 VDC; dielectric strength: 2KV for 1 min at 50 HZ; enclosure rating: IP65; temperature range: - 25 to 60 deg C; oil temperature range: -10 to 115 deg C; fastener type: stainless steel 304 with hexagon or allen key head; corrosion protection: C5m; specification: 240-56063908; sample point: for both gas release and oil sample point with 1/4" BSP female thread directly into the top casting of the relay x 50; - Tube, refrigeration: copper, OD 6.35 mm, 0.91 wall, 15.24m length x 30; - Tube, refrigeration: copper, OD 9.53 mm, 0.91 wall, 15.24m length x 50. (投標 №112550217cn)