Overview Note
SIEMENS TYPE QT (Q-CT2NC QUADS) BREAKERS ARE UL CLASS NON-CTL "CIRCUIT LIMITING" TYPE AND WILL FIT ON ANY BUS STABS WITH OR WITHOUT THE U-NOTCH. WHAT DISTINGUISHES THE Q-CT AND Q-CT2 FROM THE OLDER QT TYPES IS THAT THE Q"CT" IS A COMMON TRIP DESIGN, MEANING THAT THERE IS AN INTERNAL LINK BETWEEN THE POLES THAT DOES NOT DEPEND ON A HANDLE TIE. IN OTHER WORDS, TWO INDEPENDENT TRIP, TIED HANDLES MAY OR MAY NOT TRIP TOGETHER, DEPENDING ON THE STIFFNESS OF THE TIE. THE COMMON TRIP IS MORE RELIABLE FOR MULTIPLE POLE SIMULTANEOUS TRIPPING.
