What is a line-interactive UPS: operating principle and advantages Comment
Modern equipment is highly sensitive to power quality. The main problem in the operation of electrical networks in our country is power surges, which can lead to breakdown of expensive equipment. The uninterrupted and correct functioning of complex equipment with low quality electrical energy can be ensured by a device such as an uninterruptible power supply. The UPS successfully copes with such problems in electrical networks as frequency changes, high-frequency noise, voltage fluctuations, and power outages.
Depending on the principle of operation, there are different types of devices. Let’s look at what a line-interactive UPS means.
The operation of a linear-interactive uninterruptible power supply is based on the use of a stabilizing device and an autotransformer. This allows you to adjust the input signals without switching to batteries. This extends the battery life.
Line-interactive UPSs occupy an intermediate position between simple standby devices and expensive double conversion devices.
Scope of application
Line-interactive UPSs can be used as an uninterruptible power supply for various equipment:
- computer and household appliances,
- water supply system equipment,
- heating equipment,
- alarm, ventilation, etc.
Benefits of line-interactive UPSs
- Simplicity of design.
- Reliability and ergonomics.
- The ability to provide high-quality power supply during frequent voltage fluctuations without switching to batteries.
- Increased battery life.
- Possibility of connecting external batteries to increase the battery life of equipment connected to the UPS.
- High efficiency, 92-93%
How to make the right choice?
When choosing this type of UPS, you should pay attention to such technical characteristics as load power, noise level, switching time to different operating modes, and duration of offline operation.
Additional functions also play an important role:
- cold start – the ability to turn on electrical appliances when the centralized power supply is turned off,
- hot-swappable UPS – you can replace the battery without disconnecting the uninterruptible power supply,
- protection against complete battery discharge,
- protection against overload, short circuit,
- liquid crystal display for displaying the main technical indicators of electric current,
- monitoring and remote management of UPS.
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