[en] Results from quench studies on both short-cable samples and prototype Colliding Beam Accelerator project magnets are presented. The quantity of paramount interest is ∫I₂dt which is a monotonic function of the maximum conductor temperature obtained in a quench. Conductor damage in short samples has been observed for ∫I₂dt greater than or equal to 8.4 x 10₆ amp₂-sec at 50 kG and 4.2₀K. Each magnet is equipped with spot heaters in various locations so that systematic studies of quench propagation under controlled conditions can be made. Values of ∫I₂dt as a function of current, location, bath temperature, and cooling mode (single-phase helium versus two-phase helium) are presented. The magnets are able to absorb their own energy with a modest margin of safety for the type of quenches expected in an accelerator environment. In order to obtain an additional margin of safety, a quench-protection scheme which employs current shunting diodes across each magnet half has been adopted