The MP-4000 multifunctional microprocessor-based relay is generally used on a motor starter or a breaker used for a motor load and may be applied to any size motor at any voltage level. With the intelligence to protect and control the motor against abnormal operating conditions, MP-4000 provides motor overload, stall, short circuit, phase unbalance, single phasing over/undervoltage, underpower, power factor, and ground fault motor protection.