BUCHHOLZ RELAY: DOUBLE-FLOAT BUCHHOLZ RELAY WITH TWO CONTACTS; CONTACT SETTING OF UPPER SWITCHING SYSTEM : 1NO, CONTACT, CONTACT SETTING OF LOWER SWITCHING SYSTEM: 1NO-CONTACT; NOMINAL DC VOLTAGE: 125 VDC: MODE OF CONECTION: FLANGE 6-HOLES; DIN OF PIPE: 50MM (2”); GAS ACCUMULATION: 300 – 350CC3; DEGREE OF PROTECTION: IP-56; CLIMATIC VERSION, CASING COLOUR RAL 7033 (CEMENT-GREY)