3.5.2 Top air exhaust kitThe top air exhaust kit is used to direct the UPS cooling air front-to-top. The kiteliminates the cooling clearance requirement from the back of the unit, andenables the installation of the UPS even against a wall, in a corner or back-to-back. The kit increases the depth of the unit by 200 mm.Refer to Section4.3.1 for further information.3.5.3 Field Installed UPMA Field Installed UPM (FI-UPM) can be installed in the cabinet any time in thefuture when power needs change. This enables the UPS system to grow withthe business, thus lowering the initial investment required for the system on dayone.In order to install an FI-UPM, the UPS cabinet needs to have upgradeability,which is determined when purchasing the UPS.For a listing of the upgradeable configurations, see Table3 .CAUTIONOnly qualified service personnel can install a FI-UPM.Note: Make sure the cable and fuse rating are correct before powerupgrading.3.5.4 IP classificationsA properly installed 9PHD UPS enclosure is at a minimum IP23 rated againstelectrical shock and foreign objects. The following IP classifications areavailable for 9PHD UPS as standard and option:Table 2: 9PHD UPS standard and optional IP classes30–40 kW, 80 kW,120 kW, 160 kW50 kW, 100 kW,150 kW, 200 kWIP23 Standard StandardIP33 Option -IP54 Option -3.5.5 Internal transformerInternal transformers can be used to match the input source and loadrequirements to the internal voltages of the UPS. Auto or isolation transformersare used to match the input or output voltage to the UPS requirements. IsolationEaton 9PHD UPS 30–200 kW User's and installation guide© Eaton Corporation plc 2017. All rights reserved. Document ID: P-164000531 34 (127)