Greenheck’s line of Vari-Green™ energy control products has expanded with the introduction of the Vari-Green Drive (Model VGD-100), a factory-mounted and wired variable speed control for three-phase motors up to 10 hp.
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.
Many engineers tend to avoid or delegate the nitty gritty of a ground source heat pump system, from soil moisture effects to building system (im) balance. It's time for designers to get in the loop. Learn more about Grounded In Reality in the December issue. Other topics in the December issue include health care HVAC, Boilders, check out the Back2Basics, and more.