referring now to the figures of the drawings in detail and first , particularly , to fig1 thereof , it is seen that three circuit breaker poles 11 , 12 and 13 which are disposed at the corners of a triangle , are accommodated within a tubular housing 10 that is shown in phantom and extend parallel to the longitudinal axis m -- m of the housing 10 . supplemental conductors 14 , 15 and 16 which are disposed between the circuit breaker poles 11 , 12 and 13 , are also at the corners of a triangle which is rotated relative to the triangle formed by the circuit breaker poles 11 , 12 , 13 . the supplemental conductors 14 , 15 and 16 extend parallel to the circuit breaker poles 11 , 12 and 13 and are connected to the corresponding circuit breaker poles 11 , 12 and 13 at the bottom of the housing 10 , as seen in the orientation of the drawing , by conductor bridges 17 , 18 and 19 . current feed lines 20 , 21 and 22 and current discharge lines 23 , 24 and 25 at the upper end of the housing 10 follow the circuit breaker poles 11 , 12 and 13 and the supplemental conductors 14 , 15 and 16 . the current feed lines 20 , 21 and 22 and current discharge lines 23 , 24 and 25 are each brought out from the housing 10 through a respective opening in encapsulating tubes 26 , 27 in the housing 10 , transverse to the longitudinal central axis m -- m and are surrounded by the encapsulating tubes 26 and 27 , which form substantially a t - shape with the housing 10 . similar to the circuit breaker poles , the respective current feed and discharge lines 20 , 21 , 22 and 23 , 24 , 25 are located at the corners of a triangle , but they can alternatively lie in one plane as indicated in fig2 from which they are deflected by l - shaped intermediate pieces without reference numerals . the lines are deflected in direction to tubular gas tracks following the current lead and discharge lines , and the phase conductors thereof are then normally disposed in the triangle . connecting flanges 28 and 29 , which are discussed further below , are disposed at the end of the encapsulating tubes 26 and 27 . the current flow , through the circuit breaker pole 11 , takes place as follows : the current flows through the current feed conductor 21 downward in the direction of the arrow p 1 and through the supplemental conductor 16 upward to the current discharge conductor 24 . through the circuit breaker pole 12 , the current flows as follows : through the feed conductor 22 downward in the direction of the arrow p 1 and through the supplemental conductor 14 upward , according to the arrow p 2 . the direction of the current through the circuit breaker pole 13 flows from the current feed line 20 downward according to the direction of the arrow p 1 through the supplemental conductor 15 and then upward in direction of arrow p 2 through circuit breaker pole 13 . in this manner , the current in the circuit breaker pole 11 flows downward and again upward to the circuit breaker poles 12 and 13 . the circuit breaker poles 11 , 12 and 13 are disposed in the conductor sections 11 &# 39 ;, 12 &# 39 ; and 13 &# 39 ; respectively , and the lower positioned conductor bridges 17 , 18 and 19 respectively connect the supplemental conductor 15 with the conductor section 13 &# 39 ;, the supplemental conductor 16 with the conductor section 11 &# 39 ;, and the supplemental conductor 14 with the conductor section 12 &# 39 ;. fig2 shows an installation of the circuit breaker , which is only shown diagrammatically in fig1 in a transverse coupling section between two bus bar devices 30 and 31 . the housing 10 is formed of two housing parts 32 and 33 , wherein the a lower housing part 32 is tubular and the upper housing part 33 has the shape of a cross having a section 34 . the central axis of the section 34 is aligned with the housing part 32 and with a section 35 in the form of a compartment insulator extending transversely thereto , at which the two encapsulating tubes 26 and 27 are disposed . the circuit breaker poles 12 and 13 ( pole 11 is obscured ), the conductor bridge 19 ( the conductor bridges 17 and 18 are obscured ) and the supplemental line 14 can be seen in the interior of the housing 10 . the current feed line 22 and the current discharge line 25 are at the upper end of the circuit breaker pole 12 . in the embodiment according to fig2 the current feed lines 21 and 22 and the current discharge lines 24 and 25 each lie in one plane , from which these three current feed and discharge lines are deflected to the corners of the triangle by means of l - shaped connecting pieces without reference numerals . this construction is known in the art and reference should also be made to fig4 to 6 . the encapsulating tubes 26 and 27 are followed by the flanges 28 and 29 , and they are in turn followed , with the interposition of the compartment insulators 35 and 36 , by further encapsulated switches 37 and 38 which serve for rerouting the current feed lines downward to the respective bus bar devices 30 and 31 . as can be seen from fig2 disconnect switches and current transformers 39 can be accommodated in the two encapsulating parts 37 and 38 , in order to accomplish a transverse coupling operation between two bus bar systems . it is of less importance for the invention that a drive 39 is disposed below the housing 10 and a voltage transformer is disposed above the housing 10 . accordingly , this will not be discussed in detail herein . fig3 shows how the circuit breaker according to fig1 is accommodated in a bus bar train . it is again seen that the housing 10 is formed of the two housing parts 32 and 33 . encapsulation parts 41 and 42 are connected to the two flanges 28 and 29 with the interposition of the compartment insulators 35 and 36 . the encapsulation parts 41 and 42 are bent off in l - fashion and are each connected to a respective t - shaped housing 43 and 44 , having respective flanges 45 and 46 which are followed by a left bus bar train 47 and a right bus bar train 48 ; the two bus bar trains 47 and 48 are mutually aligned in the illustrated embodiment . the housing 10 proper which is formed of the two encapsulating parts 32 and 33 , has the shape of a cross or a t , wherein the circuit breaker poles are accommodated together with the supplemental conductors in the leg of the t , and the current feed and discharge lines are accommodated in the cross piece . reference will now be made to fig4 in which a top view of the circuit breaker can be seen in the interior of a three - pole embodiment of the housing 10 , which is shown in phantom . the circuit breaker poles 11 , 12 and 13 are located at respective corners of a triangle . the lead 21 extends to the circuit breaker pole 11 and the conductor bridge 17 can be seen at the lower end of the circuit breaker pole to have a section 49 of constructed cross section in the area between the two circuit breaker poles 12 and 13 , in order to maintain insulating spaces at that location . the supplemental conductor 14 is covered from above , specifically by the current discharge conductor 23 . the current feed line 22 has an angular subpart 50 which is followed by a connecting piece 51 which is connected to the supplemental conductor 16 that is also covered . the supplemental line ( i . e . &# 34 ; conductor &# 34 ;) 16 is followed by a connecting piece 52 which extends at an angle to the current feed line 22 and which is electrically connected to an inclined surface 53 of a further connecting piece 54 corresponding to the connecting piece 50 . the other end of the connecting piece 54 is connected to the lower end of the circuit breaker pole 13 . the current discharge line ( i . e . &# 34 ; conductor &# 34 ;) 25 is then connected at the upper end of the circuit breaker pole 13 . due to the angular piece 50 and the angular inclined surface 53 with the parts 51 and 52 , the supplemental line 16 is located outside the connecting lines of the feed line 22 and the discharge line 25 ; in this way , the insulating of the two conductor sections 50 , 51 as well as of the two sections 52 and 54 from the circuit breaker pole 11 is assured ; in other words , the circuit breaker pole 11 is enclosed by the feed conductor train up to the vertical supplemental conductor 16 and from there up to the circuit breaker pole 13 at an electrically adequate distance . in the same manner , the supplemental conductor 15 is also disposed outside the connecting lines of the current feed and current discharge lines or conductors 21 , 24 , and the connecting pieces leading thereto correspond identically to the connecting or terminal pieces 50 , 51 , 52 and 54 . they are disposed symmetrical to the center line which lies in the plane of the section line b -- b . fig5 shows a sectional view according to the section line a -- a of fig4 . the supplemental conductor 15 of fig5 is constructed as a tubular conductor which has an operating end connected through an angular piece 60 to the feed conductor 21 and which is connected through a further angular piece 61 to the lower end of the circuit breaker pole 12 . the upper end of the circuit breaker pole 12 runs through the current discharge conductor 24 to an l - shaped connecting piece 62 angled - off downward for connecting of a phase conductor continuing at the left thereof . similarly , an angular piece 63 corresponding identically to an angular piece 62 is connected to the circuit breaker pole 13 disposed behind the circuit breaker pole 12 ; as shown in fig6 an l - shaped connecting piece 64 is connected to the circuit breaker pole 11 and the corresponding supplemental conductor 14 is which is angled upwards . this is done so that the l - shaped connecting pieces 62 , 63 and 64 cause the current discharge conductors 25 , 23 and 24 which lie in one plane to also be deflected to a phase conductor located on a triangle . equal l - shaped connecting pieces are provided on the opposite side . fig6 shows a sectional view taken along the line b -- b of fig4 . fig6 shows the current discharge conductor 23 and the l - shaped connecting piece 64 connected thereto ; the supplemental conductor 14 ; a conductor section in the form of the conductor bridge 17 , which is connected through a connecting conductor section 65 to the lower end of the supplemental conductor 14 . the circuit breaker pole connected thereto has the reference numeral 11 and is connected at the upper end thereof to the corresponding connecting piece 20 which leads to the corresponding connecting piece 64 . in the embodiments described above , the respective current feed and discharge lines or conductors lie above the contact point of the circuit breaker pole . of course , they can also be located below . they can be diametrically opposite each other or they can occupy any angle between them , for instance , 90 degrees .