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What Is UPS Efficiency And How Is It Calculated?

2022-03-26 10:09

UPS efficiency is based on how much of the original incoming power is needed to operate the UPS. For example, an uninterruptible power supply with a 95% efficiency rating will have 95% of the original input powering the load and connected systems, with the remaining 5% energy “wasted” running the UPS.  For a UPS, higher efficiency equates to lower losses of electrical energy in terms of heat output – low efficiency UPS often require more air conditioning to help keep ambient temperatures safe.  

UPS 效率取决于运行 UPS 需要多少原始输入功率。例如,效率等级为 95% 的不间断电源将有 95% 的原始输入为负载和连接的系统供电,其余 5% 的能量“浪费”在运行 UPS。对于 UPS 而言,更高的效率等同于在热量输出方面降低电能损失——低效率的 UPS 通常需要更多的空调来帮助保持环境温度安全。 

 

Even a 1% or 2% improvement in operating efficiency can add to up substantial energy costs over the full service life of a UPS (i.e. approximately 10 years), particularly for larger systems with higher power ratings. However, in any discussion about UPS efficiency, it’s worth keeping two things in mind: 

Different UPS systems have different efficiencies 

The same UPS has different efficiency depending on the load level. 

在 UPS 的整个使用寿命(大约 10 年)内,即使运行效率提高 1% 或 2%,也会增加大量能源成本,尤其是对于具有更高额定功率的大型系统而言。关于UPS效率,有两点需要注意:

1,不同的UPS系统有不同的效率 

2,相同的 UPS 根据负载水平有不同的效率


The efficiency ratings that UPS manufacturers publish are based on running in online operating mode with a 100% fully-rated load. But as the load reduces, so too does UPS efficiency. As an example, a UPS running at 20-25% load may only be capable of 85% efficiency.  Efficiency is particularly important with parallel-redundant installations, as any inefficiencies arising from individual UPSs that are under-loaded will be exacerbated at scale. This can be a major issue with many legacy installations, where UPS often run at less than 50% of their rated capacity. The following picutre shows the efficiency data of PT series.

正常来说,效率等级要基于以 100% 全额定负载在线运行模式运行。但随着负载的减少,UPS 的效率也会降低。例如,在 20-25% 负载下运行的 UPS 可能只能达到 85% 的效率。 效率对于并联冗余安装尤为重要,因为负载不足的单个 UPS 引起的任何低效率都会大规模加剧。这可能是许多传统安装的主要问题,很多UPS 通常以低于其额定容量的 50% 运行。下图展示了PT系列UPS的效率数据

ups uninterruptible power supply


How Does ECO Operating Mode Impact UPS Efficiency? Running the UPS in its dedicated energy-saving mode, commonly known as ECO mode, can boost efficiency to 98-99%. It achieves this by in effect operating as a line-interactive UPS, so the load is powered by the bypass line with the inverter inactive but ready to take over if there’s mains supply failure or fluctuation.  But while efficiency improves running in ECO mode, it can affect reliability and so should only be used sparingly. 

ECO 运行模式如何影响 UPS 效率? 在专用节能模式下运行 UPS,通常称为ECO 模式,可将效率提升至 98-99%。它通过在线互动式原理运行来实现这一点,因此负载由旁路线路供电,逆变器处于非活动状态,但在主电源故障或波动时准备好接管。  虽然效率提高了,但是在 ECO 模式下的运行会影响UPS可靠性,因此只能谨慎使用。




Foshan Unipower Electronic CO.,LTD

20 years of experience in developing and manufacturing UPS, inverter and AVR products.


Oversea dept.

Tel:86-757-82962332/86-757-82782286

Fax:86-757-82962330

Email:sales@svcpower.com

Address:Block 7, No.115, 1st Zhangcha Road, Foshan, Guangdong, P.R.China


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