GE LanPro 11 U User Manual

LX: OPM_LPA_11U_5K0_10K_1US_V021 18 GE DE LanPro-11U UPS: Installation / User Manual 2.1 (US)GE Digital Energyg4.4.6 LanPro® 11U series: 2 / 3 / 4 parallel operating units – additional infoThe RPA option (Redundant Parallel Architecture) allows you to create a redundant UPS system in which 2, 3 or 4LanPro®-U units operate in parallel. The following should be considered when installing units in parallel.This section gives aditional information on:- installation (4.4.6.1)- start-up (4.4.6.2)- use / maintenance (4.4.6.3)4.4.6.1 Notes concerning installation of a parallel system1. All inputs of the UPSs must be supplied from the same phase. This is to enable bypass operation of theparallel system. All inputs must be individually protected by fuses in the installation. The values of these fusesshould correspond to the values mentioned in section 4.4 table 1.2. All outputs must be connected together, supplying the load. It is advised to install switches (S 1-4, fig. 17) inthe output wiring, in order to be able to isolate a unit from the remaining system for service and maintenancepurposes. It is advised to make a Neutral-to-Ground bounding in the output junction.3. The diameter of input and output cables must be according to the table in the installation drawings (seeappendix). Cables with different diameters can cause tripping fuses in the UPS and/or the installation.4. The length of all input cables from the input junction (Li, fig. 17) to the UPS inputs should be equal. The sameapplies to the cables from the outputs to the output junction (Lo, fig. 17). The minimum length of the input aswell as the output cables is 3 meters / 10 feet.Figure 17. Installation of parallel operating LanPro®-U UPSsF1 F2 F3 F4LanProINOUTINPUT JUNCTIONOUTPUT JUNCTIONTO LOAD1-PHASE 3-WIRE INPUTLi LiLiLiLo LoLoLoYELLOW NETWORKCABLES AS DELIVEREDWITH THE UPSLi / Lo: LENGTH OF I / O WIRING- EQUAL FOR EACH UPS- MINIMUM 3 METERS / 9.8 FEETS 1 - 4SWITCH ALLOWSISOLATION OFA UNIT FROMTHE SYSTEMF 1 - 4DISTRIBUTIONFUSE OR BREAKERVALUES ACCORDINGTO TABLE 1LanProINOUTLanProINOUTLanProINOUTRPACARDBUSTERMINATORS1 S2 S3 S4BUSTERMINATORRPACARDRPACARDRPACARDMAKENEUTRAL-TO-GROUNDBOUNDING HERE