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ITGlossary · Protection and installation
IP Rating (Ingress Protection)
Two-digit code under IEC 60529 in which the first digit shows protection against dust and solid objects and the second against water.
Technical level:Basic
The first digit runs from 0 to 6 and the second from 0 to 9; in general, the higher the number, the better the protection. A desktop UPS is usually IP20, with no protection against water. IP54 means protection against dust to a degree that does not affect operation, and against water splashed from any direction. IP65 is completely dust-tight and withstands water jets, while IP67 withstands temporary immersion up to 1 metre.
For outdoor EV chargers and inverters it is a key selection criterion. An X in place of a digit means the corresponding test was not carried out, and immersion (7) does not automatically cover jets (5, 6); that is why some devices state IP65/IP67.
The rating only applies with covers closed and cable glands tightened; one open cable entry cancels it.
Questions that mention it
All frequently asked questionsAre there UPS units for outdoor use?
Yes, there are special models with an IP rating for resistance to dust, humidity and temperature changes.
Related terms
- UndervoltageA sustained drop of mains voltage below normal that can cause malfunctions or overheat motors.
- IK Rating (Impact Protection)Scale from IK00 to IK10 under IEC 62262 that shows how much impact energy the enclosure of an electrical device can withstand.
- Circuit ProtectionDevices such as fuses and circuit breakers that open the circuit on overcurrent or short circuit to prevent damage.
- Operating Temperature and Humidity RangeThe limits of room temperature and relative humidity within which a device is designed to operate correctly.
- Overcurrent ProtectionA system designed to interrupt excessive current to protect UPS and loads.
- Altitude DeratingReduction in the rated power of a UPS, inverter or generator when it is installed above a certain altitude, usually 1,000 metres.