AO integrated power supply units with high lightning protection
Country: Italy · Model: AO
The AO power supply unit with high protection carries lightning current arresters for 200 kA per pole (10/350 µs) and combined SPDs for 50 kA per pole (8/20 µs). The multi-level protection is built for lightning and switching overvoltages. The unit is intended for strategic and telecom sites.
- Lightning current arresters
- 200 kA per pole (10/350 µs)
- Combined SPDs
- 50 kA per pole (8/20 µs)
- Composition
- isolation transformer, coordinated protection and filtering devices
- Purpose
- per the requirements of the «Absorbeur d’Ondes» specification
Technical specifications
| Lightning current arresters | 200 kA per pole (10/350 µs) |
|---|---|
| Combined SPDs | 50 kA per pole (8/20 µs) |
| Composition | isolation transformer, coordinated protection and filtering devices |
| Purpose | per the requirements of the «Absorbeur d’Ondes» specification |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The unit includes an isolation transformer and coordinated protection and filtering devices. The first stage takes the lightning current pulse, the next one limits the residual voltage, and the transformer separates the load from the mains. The design follows the requirements of the «Absorbeur d’Ondes» specification. Such a build is needed where losing power after a storm is unacceptable, that is on strategic sites and in telecommunications. The 10/350 µs pulse reproduces the current of a direct strike, while 8/20 µs is typical of overvoltages induced in the network.
How to choose
The 200 kA per pole arresters are chosen by the risk of a direct lightning strike at the site, while the 50 kA per pole SPDs cover switching and residual overvoltages. When a compact repeater supply of 1–7.5 kVA at 220/240 V is needed, look at the AI unit, where lightning protection is among the functions together with personnel protection and power distribution.
Request a price and lead time
AO integrated power supply units with high lightning protection. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What lightning current do the arresters of the AO unit withstand?
The lightning current arresters are rated for 200 kA per pole at a 10/350 µs pulse. This level describes the surge load of a direct lightning strike.
What is the role of the combined SPDs in the AO unit?
The combined SPDs are rated for 50 kA per pole at an 8/20 µs pulse. They absorb residual and switching overvoltages after the first protection stage.
What does the AO power supply unit consist of?
It includes an isolation transformer and coordinated protection and filtering devices. They work in agreement, stage by stage.
Which specification is the AO unit developed to?
The unit is developed to the technical requirements of the «Absorbeur d’Ondes» specification. It is intended for strategic and telecom sites.
How does AO differ from the AI unit?
AO has multi-level protection against lightning and switching overvoltages with declared 200 kA and 50 kA per pole. AI is rated for 1–7.5 kVA and joins personnel protection, lightning protection and distribution.
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