Uninterruptible Power Supplies
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vhbw Mini USP for WiFi Router, IP-Cameras, Modem, Computer - Uninterruptible Power Supply System USB 5 V / DC 12 V, 1.0 A
Silverline 12V Inverter 1000W (2 x 500W) 168754
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12V 220V Pure Sine Wave Inverter 4000W Pure Sine Wave Power Inverter Transformer with Remote Control & Dual AC Power Outlets for RV Car Truck Power Outlets - Dual AC Power Soc
BeMatik - 650VA 390W Line Interactive Uninterruptible Power Supply UPS with 2 Schuko
vhbw Mini USP for WiFi Router, IP-Cameras, Modem, Computer - Uninterruptible Power Supply System USB 5 V / DC 9 V / DC 12 V, 1.0 A
Mercury 652.104UK 1000w Power Inverter 12v 230v Soft Start Pure Sine Wave
BeMatik - 1000VA 650W Line Interactive Uninterruptible Power Supply UPS with 4 Schuko
BeMatik - 1000VA 1000W online Uninterruptible Power Supply UPS with 4 IEC C13
Uninterruptible Power Supplies: make the right choice
An uninterruptible power supply (UPS) is useful for protecting computer, household, or industrial devices from power outages. In-line, on-line, or off-line, it takes over in the event of a power outage, allowing users to save their data or properly shut down their devices.
Off-line UPS systems have several features to be aware of:
- they convert the direct current supplied by their battery into a crude alternating current when the voltage drops below a defined threshold;
- a micro-interruption of about 6 ms occurs during the switch-over;
- they are suitable for devices with a large capacitor like desktop PCs that are insensitive to the transition micro-interruption;
- the most powerful can reach 1 kVA.
In-line UPS systems are an alternative to off-line models:
- they are equipped with a voltage regulator;
- the micro-interruption is reduced to 2 ms during the switch-over;
- the lifetime of the battery is improved due to voltage regulation;
- they are suitable for NAS servers, SME, and micro-enterprise computer servers, generators, and home cinema systems;
- their power varies from 0.5 kVA to 5 kVA.
On-line models have some notable characteristics:
- they are equipped with a battery that continuously provides alternating current;
- the output voltage remains stable despite power outages or voltage drops at the input;
- they are recommended for sensitive devices like medical equipment or large enterprise computer servers;
- their power exceeds 5 kVA.
Thus, the UPS should be chosen based on the sensitivity of the electronic devices. Its power should be at least 1.6 times the total power of all connected devices. Finally, some UPS systems can control the shutdown of connected devices, even in the absence of the user.
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