If you are an electrical contractor installing an electrical system for a healthcare facility, you know the importance of following NFPA 99‐2005 guidelines. If you are in charge of choosing an electrical system for a newly constructed healthcare facility, you may want to learn the benefits of ungrounded systems.
Today we will focus on the advantages of the floating system inherent in Bridgeport Magnetics’ ISO-PUCK medical grade isolation transformers over Ground Fault Circuit Interrupters (GFCIs) used in grounded systems.
What Is the Difference Between Floating and Grounded Systems?
A floating system, also known as an ungrounded system, operates without a direct connection to the ground. In this setup, neither the neutral nor any phase conductor is intentionally connected to the earth. Instead, the electrical potential of the system “floats” relative to the ground potential.
Unlike floating systems, grounded systems make a direct connection between one or more conductors and the earth.
Advantages of a Floating System
Identifying and Fixing Faults without Shutdown
One of the standout features of floating systems is that, in the unfortunate event of a ground fault, its exact location can be identified and the fault remediated without the need for a complete shutdown. This feature makes floating systems indispensable in intensive care units, where uninterrupted power is essential for patient care.
Increased Safety
The inherently low fault currents associated with floating systems translate into a higher level of protection for personnel working in and around electrical installations. Reduced fault currents significantly mitigate the risks of electric shock, enhancing overall safety within the facility.
Furthermore, continuous ground-fault monitoring is mandatory for floating systems, which is instrumental in minimizing the chances of electrical fires. This monitoring system enables the swift detection and resolution of ground faults, which helps prevent electrical issues from escalating into catastrophic fire incidents. Not only does this proactive approach enhance safety, but it may also result in lower insurance premiums, as the risk profile of the floating system is reduced.
Debunking Common Myths about Floating Systems
Myth 1: Floating Systems are Expensive
It is often assumed that choosing a floating system is more expensive than a grounded system. While it is true that installing an ungrounded system initially requires higher expenses than traditional grounded systems, it is important to consider the bigger picture.
Apart from the initial costs, floating systems offer several non-cash benefits, such as preventive maintenance and a reduced need for frequent testing. Although the upfront cost may be higher, the overall cost-effectiveness of floating systems becomes apparent over time.
Myth 2: Grounded System Fault Locations are Easier to Find
It is commonly believed that identifying faults in grounded systems is a swift and efficient process. However, it is essential to note that ground-fault location systems (IFLS) can also be utilized in floating systems to enable quick and precise fault localization.
Contrary to popular belief, floating systems equipped with ground-fault location devices guarantee minimal downtime and prompt resolution of electrical issues.
At Bridgeport Magnetics, we can supply ISO-PUCK medical-grade isolation transformers for your floating system. Contact us today. Feel free to call us at (203) 954-0050 or (800) 836-5920 or send us an email at sales@bridgeportmagnetics.com.