Arrangement for the cooling of liquid-cooled electrical equipment

1. An arrangement for the cooling of one or more liquid cooled electric devices ( 3 ), said arrangement being fitted to convey heat produced in the one or more electric devices ( 3 ) away from the one or more electric devices ( 3 ) by means of a liquid flowing through a cooling element ( 3 c ) of each of the one or more electric devices ( 3 ), said arrangement comprising:

a first instrument cubicle ( 1 ) with one or more electric devices ( 3 ) placed therein,

a first rectangular box-shaped footing element ( 2 ) arranged below the first instrument cubicle ( 1 ),

a cooling apparatus ( 16 ) arranged so as to abut against a lateral side of the first instrument cabinet ( 1 ) and a lateral side of the first rectangular box-shaped footing element ( 2 ),

an inlet main pipe ( 20 ) and an outlet main pipe ( 21 ) arranged inside the first rectangular box-shaped footing element ( 2 ), and extending in a lateral direction from the first rectangular box-shaped footing element ( 2 ) into a lower side portion ( 16 s ) of the cooling apparatus ( 16 ),

an inlet piping ( 10 ) detachably connected to the inlet main pipe ( 20 ), the inlet piping ( 10 ) and the inlet main pipe ( 20 ) connecting the cooling element ( 3 c ) of each of the one or more electric devices ( 3 ) and the cooling apparatus ( 16 ) for conveying a cooling liquid into the cooling element ( 3 c ) of each of the one or more electric devices ( 3 ),

an outlet piping ( 11 ) detachably connected to the outlet main pipe ( 21 ), the outlet piping ( 11 ) and the outlet main pipe ( 21 ) connecting the cooling element ( 3 c ) of each of the one or more electric devices ( 3 ) and the cooling apparatus ( 16 ) for conveying a cooling liquid out of the cooling element ( 3 c ) of each of the one or more electric devices ( 3 ), and

a grommet seal ( 6 ) sealing an outside of the inlet piping ( 10 ) and outlet piping ( 11 ) between the first instrument cubicle ( 1 ) and the first rectangular box-shaped footing element ( 2 ) arranged below the first instrument cubicle ( 1 ),

wherein the inlet piping ( 10 ) and the outlet piping ( 11 ) are detachably connected to circumferential sides of the main pipes ( 20 , 21 ), curve upwardly to pass through the grommet seal ( 6 ) between the first instrument cubicle ( 1 ) and the first rectangular box-shaped footing element ( 2 ), and then extend upwardly to a bottom side of the cooling element ( 3 c ) of each of the one or more electric devices ( 3 ).

2. The arrangement according to claim 1 , wherein the arrangement comprises a protective pipe ( 13 ) placed around each of the inlet piping ( 10 ) and the outlet piping ( 11 ) and fitted to convey the cooling liquid away from the vicinity of the one or more electric devices ( 3 ) in a leakage situation.

3. The arrangement according to claim 2 , wherein the footing element ( 2 ) further comprises an indication main pipe ( 26 ) and connection means for receiving the protective pipe ( 13 ) into the indication main pipe ( 26 ), which conveys the cooling liquid in a leakage situation to a selected location,

wherein the protective pipe ( 13 ) placed around the inlet piping ( 10 ) and outlet piping ( 11 ) passes through and is sealed by the grommet seal ( 6 ) between the first instrument cubicle ( 1 ) and the first rectangular box-shaped footing element ( 2 ).

4. The arrangement according to claim 3 , wherein the indication main pipe ( 26 ) is extended with a jointing sleeve ( 15 ) so as to allow a second rectangular box-shaped footing element ( 2 ′) of a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

5. The arrangement according to claim 3 , wherein the indication main pipe ( 26 ) receives both the protective pipe ( 13 ) of both the inlet piping ( 10 ) and the protective pipe ( 13 ) of the outlet piping ( 10 ).

6. The arrangement according to claim 3 , wherein the inlet main pipe ( 20 ) and outlet main pipe ( 21 ) of the first rectangular box-shaped footing element ( 2 ) are extended with a jointing sleeve ( 15 ) so as to allow a second box-shaped footing element ( 2 ′) below a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

7. The arrangement according to claim 3 , wherein the inlet main pipe ( 20 ) and outlet main pipe ( 21 ) of the first rectangular box-shaped footing element ( 2 ) are terminated with a detachable end piece that can be replaced with a jointing sleeve ( 15 ) so as to allow a second rectangular box-shaped footing element ( 2 ′) below a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

8. The arrangement according to claim 2 , further comprising an indication main pipe ( 26 ) disposed in the first rectangular box-shaped footing element ( 2 ) for receiving both the protective pipe ( 13 ) of both the inlet piping ( 10 ) and the protective pipe ( 13 ) of the outlet piping ( 10 ).

9. The arrangement according to claim 8 , wherein the inlet main pipe ( 20 ) and outlet main pipe ( 21 ) of the first rectangular box-shaped footing element ( 2 ) are extended with a jointing sleeve ( 15 ) so as to allow a second rectangular box-shaped footing element ( 2 ′) below a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

10. The arrangement according to claim 8 , wherein the indication main pipe is extended with a jointing sleeve ( 15 ) so as to allow a second rectangular box-shaped footing element ( 2 ′) below a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

11. The arrangement according to claim 8 , wherein the inlet main pipe ( 20 ) and outlet main pipe ( 21 ) of the first rectangular box-shaped footing element ( 2 ) are terminated with a detachable end piece that can be replaced with a jointing sleeve ( 15 ) so as to allow a second rectangular box-shaped footing element ( 2 ′) below a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

12. The arrangement according to claim 2 , wherein an indication main pipe ( 26 ) receives both the protective pipe ( 13 ) of both the inlet piping ( 10 ) and the protective pipe ( 13 ) of the outlet piping ( 10 ).

13. The arrangement according to claim 2 , wherein the inlet main pipe ( 20 ) and outlet main pipe ( 21 ) of the first rectangular box-shaped footing element ( 2 ) are extended with a jointing sleeve ( 15 ) so as to allow a second rectangular box-shaped footing element ( 2 ′) below a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

14. The arrangement according to claim 2 , wherein the inlet main pipe ( 20 ) and outlet main pipe ( 21 ) of the first rectangular box-shaped footing element ( 2 ) are terminated with a detachable end piece that can be replaced with a jointing sleeve ( 15 ) so as to allow a second rectangular box-shaped footing element ( 2 ′) below a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

15. The arrangement according to claim 1 , wherein the inlet main pipe ( 20 ) and outlet main pipe ( 21 ) of the first rectangular box-shaped footing element ( 2 ) are extended with a jointing sleeve ( 15 ) so as to allow a second rectangular box-shaped footing element ( 2 ′) of a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

16. The arrangement according to claim 15 , wherein the inlet main pipe ( 20 ) and outlet main pipe ( 21 ) of the first rectangular box-shaped footing element ( 2 ) are terminated with a detachable end piece that can be replaced with a jointing sleeve ( 15 ) as to allow a second rectangular box-shaped footing element ( 2 ′) below a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

17. The arrangement according to claim 1 , wherein the inlet main pipe ( 20 ) and outlet main pipe ( 21 ) of the first rectangular box-shaped footing element ( 2 ) are terminated with a detachable end piece that can be replaced with a jointing sleeve ( 15 ) so as to allow a second rectangular box-shaped footing element ( 2 ′) under a second instrument cubicle ( 1 ′) to be placed beside and abut directly against the first rectangular box-shaped footing element ( 2 ) below the first instrument cubicle ( 1 ).

18. The arrangement according to claim 1 , wherein the inlet main pipe ( 20 ) and the outlet main pipe ( 21 ) of the first rectangular box-shaped footing element ( 2 ) are terminated with an end piece ( 22 ) that comprises venting means ( 23 ) and exhaust means ( 24 ) for exhausting and venting the inlet main pipe ( 20 ) and the outlet main pipe ( 21 ).

19. The arrangement according to claim 1 , wherein an indication main pipe ( 26 ) of the first rectangular box-shaped footing element ( 2 ) is made of transparent material to allow easier detection of a possible leakage point.