I need to know the matlab programming for single phasing preventer

Protection of induction motors against single phasing or reverse phasing or unbalance supply is one of the major problems in electrical systems. For safe running of 3-phase motors, special protections that keep a continuous watch on supply conditions are very essentials. The major cause of maxium motors burn-out is overloading which occurs due to unbalance supply or single phasing. Phase failure occurs in case of fuse blown-off, loose connections or loss of phase from supply itself.

90% of total burn out of the motors are mainly due to overloading caused by unbalanced voltage conditions or phase failure. This fault remains
undetected by conventional bimetallic overload relays and need a negative sequence component of voltage or current sensing single phasing
preventer. They trip the motor starter if it goes beyond the set level of voltage or current.
GELCO current and voltage sensing SPP offers protection up to motor terminals and does not allow motor to start under unfavorable supply
conditions. The negative sequence current sensing is the best principle for single phasing protection.