An uninterruptible power supply system (100, 300) comprising: a plurality of UPSs (102, 104, 106, 108, 102, 104, 106, 108, 302, 304, 306); a ring bus (118, 314, 410, 510) coupled to said plurality of UPSs (102, 104, 106, 108, 302, 304, 306); a plurality of chokes (130, 132, 134, 136, 332, 334, 336, 406, 418, 518), each choke of said plurality of chokes (130, 132, 134, 136, 332, 334, 336, 406, 418, 518) electrically coupling a respective UPS of said plurality of UPSs (102, 104, 106, 108, 302, 304, 306) to said ring bus (118, 314, 410, 510); and at least one switch (340, 342, 344, 408) coupled between an associated UPS of said plurality of UPSs (102, 104, 106, 108, 302, 304, 306) and said ring bus (118, 314, 410, 510), said at least one switch (340, 342, 344, 408) being configured to be switched to selectively bypass at least one choke of said plurality of chokes (130, 132, 134, 136, 332, 334, 336, 406, 418, 518) wherein said at least one switch (340, 342, 344, 408) is configured to be selectively switched to bypass said at least one choke (130, 132, 134, 136, 332, 334, 336, 406, 418, 518) in response to a fault occurring at said associated UPS (102, 104, 106, 108, 302, 304, 306); characterized in that said at least one switch is a static switch and the system further comprises a first fuse (404, 504) coupled to said associated UPS (102, 104, 106, 108, 302, 304, 306), wherein said first fuse (404, 504) is configured to electrically disconnect said associated UPS (102, 104, 106, 108, 302, 304, 306) from said ring bus (118, 314, 410, 510) in response to a fault current from said ring bus (118, 314, 410, 510) exceeding a predetermined threshold, wherein said at least one static switch (340, 342, 344, 408) is configured to be selectively switched to selectively bypass said at least one choke (130, 132, 134, 136, 332, 334, 336, 406, 418, 518) to provide the fault current to said first fuse (404, 504). a plurality of UPSs (102, 104, 106, 108, 102, 104, 106, 108, 302, 304, 306); a ring bus (118, 314, 410, 510) coupled to said plurality of UPSs (102, 104, 106, 108, 302, 304, 306); a plurality of chokes (130, 132, 134, 136, 332, 334, 336, 406, 418, 518), each choke of said plurality of chokes (130, 132, 134, 136, 332, 334, 336, 406, 418, 518) electrically coupling a respective UPS of said plurality of UPSs (102, 104, 106, 108, 302, 304, 306) to said ring bus (118, 314, 410, 510); and at least one switch (340, 342, 344, 408) coupled between an associated UPS of said plurality of UPSs (102, 104, 106, 108, 302, 304, 306) and said ring bus (118, 314, 410, 510), said at least one switch (340, 342, 344, 408) being configured to be switched to selectively bypass at least one choke of said plurality of chokes (130, 132, 134, 136, 332, 334, 336, 406, 418, 518) wherein said at least one switch (340, 342, 344, 408) is configured to be selectively switched to bypass said at least one choke (130, 132, 134, 136, 332, 334, 336, 406, 418, 518) in response to a fault occurring at said associated UPS (102, 104, 106, 108, 302, 304, 306); characterized in that said at least one switch is a static switch and the system further comprises a first fuse (404, 504) coupled to said associated UPS (102, 104, 106, 108, 302, 304, 306), wherein said first fuse (404, 504) is configured to electrically disconnect said associated UPS (102, 104, 106, 108, 302, 304, 306) from said ring bus (118, 314, 410, 510) in response to a fault current from said ring bus (118, 314, 410, 510) exceeding a predetermined threshold, wherein said at least one static switch (340, 342, 344, 408) is configured to be selectively switched to selectively bypass said at least one choke (130, 132, 134, 136, 332, 334, 336, 406, 418, 518) to provide the fault current to said first fuse (404, 504).