不间断电源常用英语名词及解释不间断电源常用英语名词及解释.pdf

Uninterruptible Power Supply (UPS) Glossary Ampere-Hour (AH): A figure indicating battery capacity, generally defined for 5, 10 or 20 Hours discharge time. AH figure should be divided by the discharge time to get the maximal discharge current. The AH capacity is a function of discharge time, decreasing at short backup times. Thus, 20H rated 10AH battery, may supply only 3.5AH for 15 minutes or 2.5AH for 5 minutes. Battery capacity also depends on temperature, aging, number and depth of discharge cycles, and preventive maintenance. ASAI (Average Service Availability Index): Electric Utility Reliability Index that represents the ratio of total customer minutes that service was available to total customer minutes demanded in a time period. 2003 USA Average ASAI =0.9994. (source: Electric Department City of Wadsworth). ATS (Automatic Transfer Switch): See Transfer Switch. Audible Alarm: An audible signal enunciated upon mains outage or UPS failure or warning. Intermittent tone signals may indicate various announcements. An alarm silence button enables disabling the audible signal. Audible noise: Noise emitted by the UPS generally measured by dBA units, at a distance of 1or 1.5-meter from the UPS. Most UPS systems are less than 55dBA , which is relatively quiet. High power systems ( above 60 KVA) may present noise figure of about 65dBA, which is the level of main road high traffic environment. Auto Dial: A feature enabling the UPS to automatically report alarm and status via a modem to a remote location. Automatic Battery test: A preventive test and alarm aimed to reveal weak or damaged batteries. The test is generally performed at user selectable-programmed intervals. Automatic Restart: A function that enables, upon Mains Power restoration, an Automatic Restart of a UPS, which was turned off, due to batteries discharge during Power outage. Automatic Retransfer: An Automatic transfer from Bypass to Invert