| 摘要 |
PCT No. PCT/NO84/00059 Sec. 371 Date Jul. 24, 1985 Sec. 102(e) Date Jul. 24, 1985 PCT Filed Dec. 14, 1984 PCT Pub. No. WO85/02601 PCT Pub. Date Jun. 20, 1985.A control system for diverting/equalizing electrical potentials between two objects, for example the shell (1) of a storage tank installation and the body (10) of a tank truck/vessel, when loading flammable/explosive fluids, wherein an electrical equalizer connection (5,6,14) connects the body (10) of the tank truck via a terminal (10a) to the storage tank (1) via a terminal (1a). The terminals (1a and 10a) are part of respective control circuits comprising a low voltage source (U1; U2), a resistor (4; 13) and an indicator (8,9) for registering current flow and thereby controlling/blocking the connection/disconnection of a fluid pump. To check that electrical connection has in fact been established at the terminals (1a,10a), each of these is connected to a respective control circuit via separate terminals, namely a terminal (1b; 10b) on the respective bodies (1; 10) and a terminal (6a; 6b) on a busbar (6) in the equalizer connection ( 5,6,14). A plug connector (15) with an explosion-proof switch is connected to the control circuit for the tank truck and comprises an auxiliary contact for connecting a relay (17) in the tank truck's electrical system to its body (10) such that when the plug (15) is connected, the connection between the vehicle's battery (19) and its electrical user circuits (20) will be broken, if the vehicle's main switch (18) has not been turned off. Spark formation and the possible setting off of explosive gases, as well as a planned or accidental starting of the vehicle during loading are thereby prevented. |
