Siemens SIPROTEC 7XR81 Manual page 59

4.8 Protection Degree according to IEC 60529
For the equipment
For personal protection
3 To meet IP2x on Terminal B, additional measures have to be taken. After installation of the cables, the terminal has to be properly
covered using an insulating material to avoid direct contact to the screws (e.g. using the self-adhesive tape Terosat 2750 by Henkel);
otherwise the device has to be considered IP1x.
SIPROTEC, Coupling Units for Generator Protection, Manual
C53000-H5040-C072-1, Edition 09.2018
IP20
IP2x 3
7XR87 Voltage Divider for Excitation Voltage
4.8 Protection Degree according to IEC 60529
59