Staircase emergency power
modern and static UPS systems are considered as a central support system for feeding essential loads during blackouts, which builds an emergency power system It is necessary in security centers and hospitals.
Almost all data centers and important and security centers with critical loads, such as hospitals, choose online UPS, which have a level of higher reliability capability . offers.
In this article, we show the key points of each topology in UPS and emergency power systems, which also includes the types and components of the UPS emergency power system. Therefore, you can choose the best option with special features.
Read more: Emergency power supply for the store
Common emergency power system (Off-line UPS)
As you can see, under normal conditions, building loads are supplied through the main bus and the static switch, and the switch is connected to the bus to the load.
When a grid fault or blackout occurs, then the static switch changes state and feeds the load through the battery and inverter system. Radio detection sensors and relays can also be used to determine abnormal conditions.
Static switch in conventional emergency power system or offline UPS, any disconnect or fault in time range less than 10 milliseconds It detects the second and puts the backup power system in the circuit and does not allow load interruption. However, some sensitive loads and modern electronic equipment are also sensitive and vulnerable to these few milliseconds. Offline systems are usually designed to feed and support small loads.
Online emergency power system (On-line UPS)
In online emergency power systems or online UPS, the current passes through the rectifier and inverter before reaching the load in the building. Therefore, in this type of backup power system, the rectifier or charger acts as a harmonic filter and protection against overloads and voltage drops of the national network. Meanwhile, a DC fuse controls the battery voltage and the input voltage to the inverter. In this type of system, the load uses the central UPS system all the time it is fed, and the rectifier, inverter and protection control blocks are used as a barrier for transient states, harmonic currents and also to provide a suitable output voltage. are set
However, advances in semiconductor and transistor technology have led to the development of transformerless UPS systems. These emergency power systems provide the benefits of online UPS, better efficiency, reduction in operating costs, less noise. /strong>, offer increased battery life and lower capital costs.
Advantages and disadvantages of conventional and online emergency power system
Advantages and disadvantages of conventional emergency power system
- Protection from electric charges
- voltage drop protection
- 2 to 10ms static key delay
- reducing investment costs
Advantages and disadvantages of online emergency power system
- It has a high level of confidence
- Voltage and current are adjusted and delivered to the load without additional electrical and harmonic fluctuations
- Not interrupting the load during grid power failures
- Higher initial capital cost
- Higher operating and maintenance cost