These breakers will have an Amperes Interrupting Capacity (AIC) Not upon the magnetic (instantaneous) section. Exceptįor comparatively small branch breakers, these systems will usuallyĭepend upon the thermal or electronic section of the breaker and Shorter the time allowed before opening the circuit breaker. In other words, the greater the current, the The best circuit breakers for this condition have inverse time To determine reaction time in a fault situation, and are much safer Overcurrent Protection for Emergency & StandbyĬircuit breakers can be reset after tripping, have many options To the generator field during fault conditions. Coordinationīe simplified using voltage regulation controls to apply full National Electric Code (NEC) for life safety loads. Of protective devices in circuits fed by generators is required To abnormal conditions that exceed output ratings. INTRODUCTION: Power generation equipment must be protected from Must be replaced after tripping blows the filament inside. Types of protective devices usedįuses typically work faster and are less expensive, but they Important life safety circuits may be lost because of a faultĮlsewhere as shown in Figure 1. Overcurrent protection, the entire system is out of service, and Overloads, short circuits or ground fault events. Overcurrent protection is defined as any current above the Overcurrent Protection for Emergency & Standby GENERATOR SYSTEMS Load 1 Load 2 Generator Main CB Fault Fuse CB1 Load 3 Load 4 Figure 1ĪUTHOR CARSON BISHOPSenior Project Engineer Coordination can be simplified using voltage regulation controls to apply full excitation to the generator field during fault conditions. The coordination of protective devices in circuits fed by generators is required by the National Electric Code (NEC) for life safety loads. INTRODUCTION: Power generation equipment must be protected from damage due to abnormal conditions that exceed output ratings. FUSES Fuses typically work faster and are less expensive, but they must be replaced after tripping blows the filament inside. Types of protective devices used include fuses and circuit breakers.
Without overcurrent protection, the entire system is out of service, and important life safety circuits may be lost because of a fault elsewhere as shown in Figure 1.
These conditions are typically caused by overloads, short circuits or ground fault events. Power Systems Division OVERCURRENT PROTECTION: DEFINITION Overcurrent protection is defined as any current above the generator rating. POWER SYSTEMS TOPICS 120 AUTHOR CARSON BISHOP Senior Project Engineer KOHLER Co.
0 kommentar(er)
