Power blackouts are a frequent occurrence in industrial facilities. The reason could be a fault in the utility side or a fault on the load ends of the feeders. How will we get to know whether a circuit breaker is capable of interrupting these electrical faults in the system? If these high fault currents exceed the interrupting capability of the protective device, it results in an increase in the likelihood of an explosion which could potentially damage the device itself. The answer lies with a coordination study, which could help in preventing a certain equipment failure from taking down the entire facility resulting in a blackout.
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Overcurrent Protection Devices:
OCP devices are used in main service disconnects or in the feeders for residential, industrial or commercial use. Due to improper overload or short circuit protection, that can result in burning of the materials, Allumiax offer a proper setting of a device's voltage rating, current rating, or interrupting rating to vanish the reasons that causes equipment damage or hazardous conditions.
We use the strategy to eliminate or reduce the instances when the current exceeds the rating of the conductors or the equipment. Proper analysis between the upstream and downstream devices are done to ensure safety.
The objective of Allumiax is to provide the industry with best practices for electrical circuits overcurrent protection and selective coordination of protective devices. We have the experience to apply these practices on projects to minimize power disruption.
Protection is one of the most significant purpose for the electrical power system and its components. So it’s our goal to design a safe and reliable power distribution system and should must consider life safety and equipment protection.
Selective Coordination Study:
Selective coordination is the protective device coordination between selected feeders in order to achieve perfect coordination between those feeders. According to the NEC, selective coordination means that the fuse or circuit breaker closest to the fault opens up without opening up the fuse or the circuit breaker that feeds it (from the upstream side). So you won’t have black out conditions that can occur if there is a fault somewhere downstream.
Selective coordination of a power system is desirable but not always required. However, NEC makes selective coordination compulsory in specific situations.
AllumiaX objective is to determine the best coordination for the entire system. This approach necessitates tradeoffs in selectivity for some parts of the system to achieve maximum coordination in more critical areas.
This study will be performed to achieve the required selective coordination within the operating limits of the existing protective devices and recommendations have been provided to ensure the same for all emergency, COPS and life safety systems.
The proven expertise of our team of certified professional engineers will aid in the evaluation of your system and deliver state-of-the-art coordination solutions for your power system’s protection. We work closely with our clients in collecting the data, modeling the system, simulating faults and abnormalities, plotting the characteristic curves & offering solutions in compliance with the latest industrial standards.
AllumiaX, LLC provides independent and third-party engineering support by presenting comprehensive deliverable reports backed by industry standards and best practices, analysis work based on industry-leading software (ETAP), and proven results based on accurate modelling and calculations. The reports are expected to include the following deliverables:
- A comprehensive model of the facility in modern power systems software
- Evaluation of the system under short circuit conditions for normal and emergency scenarios
- Accurate models of the characteristic curves on log-log plots
- Comparative analysis between the upstream and downstream protective devices
- Protective device settings for achieving selective coordination
- Relay settings for optimum protection of each protective device
- Recommendations for the prevention of power blackouts
- Tabulated results of the study in compliance with NEC, IEEE ,ANSI & NFPA standards
Study Outcomes & Recommendations
Coordination studies are performed as per the latest IEEE, NEC, ANSI & NFPA standards. Study outcomes and recommendations are expected to improve your facility in the following areas:
- Overall reliability of the system is expected to increase
- Significant improvements in the fault isolation at each point
- Reduced power blackouts within the facility
- Damage reduction to the existing protective devices
- Minimization of nuisance tripping caused by motor starting and transformer inrush currents
- Selective coordination for life safety systems as per NEC standards
- NFPA 70, “National Electric Code” ,2017
- NFPA70E, “Standard for Electrical Safety in the Workplace”, 2017
- IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems, pp. 242-2001, 2001.
- IEEE Recommended Practice for Industrial and Commercial Power Systems Analysis, pp. 399, 1997
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At AllumiaX, Our top priorities are delivering high quality engineering and field service while providing a remarkable customer experience. We have a work license for more than 8+ states across the United States (USA) and we have also sub-contracted work with Siemens, ESR Inc. and IEM.