Power quality in HVAC applications: Page 2 of 2

November 22, 2017 // By Steve Hughes
Most people can remember a time when they've walked into a room and seen one person dressed for the arctic while the person next to them looks like they're in the Bahamas. 

Facilities managers responsible for a building's HVAC system are also obliged to meet industry standards such as EN61800-3, which specifies the limits of electromagnetic emissions, immunity levels and testing methods for power drive systems (PDS) — the parts of a VSD that control driven equipment.

The standard identifies four categories where PDSs can be used in one of two environments. The first environment looks at domestic premises, low voltage networks, houses, apartments and residential buildings. The second looks at industrial buildings and those supplied by a dedicated transformer such as factories and plants. Depending on the category, the standard either lets anyone install the PDS or requires installation by a professional.

According to the standard, a PDS rated at less than 1000V can be installed by anyone in domestic premises. This is already causing problems as the demand for apartment buildings grows. Apartment buildings typically use more sophisticated building management systems, with electronics controlling the heating, lifts, extraction, doors, telecoms and internet-over-mains connections, all of which can be compromised by poor power quality, ultimately hampering the user's experience.

To enable facilities managers to use drives properly in their HVAC system, REO UK has developed an entire suite of products dedicated to eliminating power quality problems in HVAC applications. The REO Unity range comprises electromagnetic compatibility (EMC) filters, mains chokes, output chokes, sinewave filters and powerline filters.

So, the next time you feel like wearing your shorts to the office, make sure your HVAC system is running as cool as you look.

About the author:

Steve Hughes is managing director of REO UK - www.reo.co.uk

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