SHORT CIRCUIT STUDY
The intent of performing short circuit studies is to evaluate an electrical system’s capacity to determine the magnitude of currents that can flow through the electrical network and electrical equipment during an electrical fault. The study is carried out exhaustively with careful design considerations to maintain a very high level of continuity of service, as well as to ensure that the system will be operating as designed. The study is important because it helps to identify the magnitude of short circuit current that the system is capable of producing and compares that magnitude with the interrupting rating of the overcurrent protective devices (OCPD). This comparison helps to determine the required interrupting capacity of the circuit breakers which forms the basis of designing a proper relaying system. Short circuit studies are activities related to design considerations for new systems, analytical studies for existing systems, and also addresses operational and model validation considerations for industrial and commercial power systems.
· Ensure site safety by calculating the interrupting ratings and identifying hazardous areas.
· Protect personnel and equipment by establishing proper interrupting ratings of protective devices.
· Predict incident energy levels and complete a detailed protective device coordination study.
· Avoid unplanned outages and downtime.
· Avoid interruptions of essential services.
· Reduce the risk of equipment damage and fires.
· Increase safety and protect people from injuries.
· Determine the level and type of protective devices that are needed.
· Provide the information needed for NEC and NFPA required labels.
· Keep you in compliance with NEC requirements.
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