Whether your need is greater reliability, increased capacity, higher ratings, or greater safety, National Switchgear can provide new products that meet or exceed today’s requirements. Our computer-aided engineering and custom fabrication deliver solutions with minimal installation time at a fraction of the cost. Custom solutions are our specialty, and we invite you to put us to the test.
Industrial Power System Studies Provide The Basis For:
National Switchgear provides and delivers engineering studies to a broad range of industries including primary metals, pulp and paper, petrochemical, cement, electronics, water treatment and data processing centers. All of our services are designed to maximize power quality, improve system performance and reliability and increase personnel safety.
With their years of experience in the testing and maintenance of power systems, our team of expert engineers employs the popular SKM Power Tools and electrical engineering software enabling them to deliver engineering documents that you can have complete confidence in.
Ask us how an investment in engineering studies can maximize your system reliability and reduce the risk of serious injury.
A short circuit study can help minimize the consequences of a power system fault.
Ratings for short circuit interruption equipment including breakers and fuses should exceed those calculated by the study in order to avoid more widespread effects. Short circuit calculations are also useful when meeting the National Electrical Code (NEC) requirement for capabilities in excess of duties imposed on the short circuit devices by the system.
National Switchgear’s study calculation procedures are in accordance with American National Standards Institute (ANSI) and IEC 60909.
A coordination study recommends settings for adjustable protective devices that minimize disturbances due to system faults. These devices include switchgear protective relays and circuit breaker trip devices, which provide automatic tripping during disturbances. Recommendations may also be made for revising the type of protective device that is applied.
The prime consideration of this study is to minimize the number of system components disconnected to remove a fault or abnormal condition, thereby permitting continued operation for the greatest possible remainder of the system.