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APC was founded in 1981 by three MIT Lincoln Lab electronic power engineers. Originally, the engineers focused on solar power research and development. [ 2 ] When government funding for their research ended, APC shifted its focus to power protection by introducing its first UPS in 1984.
The Smart-UPS is a series of enterprise-level uninterruptible power supplies (UPS) made by American Power Conversion (APC). [1] Most of the units have a SmartSlot (with the exception of SC and SMC series) which accepts an optional interface card providing features ranging from network connectivity to temperature and humidity monitoring. [2]
The offline/standby UPS offers only the most basic features, providing surge protection and battery backup. The protected equipment is normally connected directly to incoming utility power. When the incoming voltage falls below or rises above a predetermined level the UPS turns on its internal DC-AC inverter circuitry, which is powered from an ...
BEIJING (Reuters) -More than 400 people trapped by rubble in earthquake-stricken Tibet have been rescued, Chinese officials said on Wednesday, with an unknown number still unaccounted for in ...
A valve-regulated lead-acid battery is a battery type that is popular in telecommunications network environments as a reliable backup power source. VRLA batteries are used in the outside plant at locations such as Controlled Environmental Vaults (CEVs), Electronic Equipment Enclosures (EEEs), and huts, and in uncontrolled structures such as ...
APC tablet, analgesic compound of aspirin, phenacetin, and caffeine Argon plasma coagulation , an endoscopic technique for controlling hemorrhage Atrial premature complexes , a type of premature heart beat or irregular heart beat or arrhythmia which start in the upper two chambers of the heart
From a hotel room, Silverstein watched the Ring cameras stationed around his home as the fire gradually encircled his property through the night.
For a 208 VAC emergency supply system, a central battery system with automatic controls, located in the power station building, is used to avoid long electric supply wires. This central battery system consists of lead-acid battery cell units to make up a 12 or 24 VDC system as well as stand-by cells, each with its own battery charging unit ...
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