Hair’s Mini VRF bridges the gap between the small multi-zone residential applications to multi-zone light commercial needs. Mini-VRF can have up to nine indoor units with nine zones of temperature control and comfort. With a 984 ft refrigerant line length, multi-story applications and large building application is now possible.
Nidec Motor Corporation (NMC) is launching U.S. MOTORS® brand Hybrid Drives™ for commercial and industrial applications. The 1-10 hp drives are part of NMC’s ACCU-Series™ line of variable speed and inverter duty products, which the company says forms a system solution for maximum compatibility, reliability, and performance.
B&K Precision is offering three new models of its high power programmable DC power supplies, models PVS10005, PVS60085, and PVS60085MR. The new PVS Series delivers output power up to 5.1 kW. The company says they deliver excellent regulation, low noise, and fast transient response times. All models provide a built-in solar array simulator (SAS) function to generate photovoltaic I-V curves. Offering high-power density in a compact 2U form factor, these DC power supplies are suitable for high voltage testing up to 1000 V, motor inverter testing, and solar array testing applications.
Danfoss will extend its inverter scroll compressor range VZH to include three new models. According to the company, the variable speed VZH compressors provide efficiency at part-load conditions, and can improve efficiency by more than 30% compared to fixed-speed compressors.
Why was one floor’s laboratory ventilation failing to keep up, when it was even the closest floor to the rooftop fans? Some system sleuthing led two engineers to a fitting conclusion. Read more stories in May Issue 2017.