Fresh leaf tea contains more tannins than processed teas, according to Victor R. Preedy, author of Tea in Health and Disease Prevention.. The color of tea influences tannins, too. White tea, for example, has fewer tannins than black tea, according to the Pacific College of Oriental Medicine.annins 101. Tannins are polyphenols, compounds present in plant foods, that are responsible for the colors of many flowers and the astringent flavor of foods such as unripe fruit and tart red wine, according to Cornell University. Tannins also help proteins retain their molecular structure, Cornell University notes.
Emergency power system. An emergency power system is an independent source of electrical power that supports important electrical systems on loss of normal power supply. A standby power system may include a standby generator, batteries and other apparatus.
The standard also addresses installation, maintenance, operation, and testing requirements for these components of the. emergency power supply system. Transfer switches are installed in the emergency power system to transfer the. electrical load from the normal power source to the emergency power source. (generator) upon failure of normal power.