g
Digital Energy™ LP Series
4.5.6 LP 11U series: 2 / 3 / 4 parallel operating units – additional info
The RPA option (Redundant Parallel Architecture) allows you to create a redundant UPS system in which 2, 3 or 4
This section gives aditional information on:
-installation (4.5.6.1)
-
-use / maintenance (4.5.6.3)
4.5.6.1Notes concerning installation of a parallel system
1.All inputs of the UPSs must be supplied from the same phase. This is to enable bypass operation of the parallel system. All inputs must be individually protected by fuses in the installation. The values of these fuses should correspond to the values mentioned in section 4.5 table 1.
2.All outputs must be connected together, supplying the load. It is advised to install switches (S
3.The diameter of input and output cables must be according to the table in the installation drawings (see appendix). 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 same applies to the cables from the outputs to the output junction (Lo, fig. 17). The minimum length of the input as well as the output cables is 3 meters / 10 feet.
INPUT JUNCTION
F
DISTRIBUTION FUSE VALUES ACCORDING TO TABLE 1
BUS
TERMINATOR
IN | IN |
| IN |
| IN | |
|
|
| ||||
|
|
|
|
|
|
|
RPA CARD |
| RPA CARD |
| RPA CARD |
| RPA CARD |
OUT | OUT |
| OUT |
| OUT | |
S
SWITCH ALLOWS
ISOLATION OF A UNIT
FROM THE SYSTEM
|
| OUTPUT JUNCTION |
Li/Lo: LENGTH OF I/O WIRING | MAKE | YELLOW NETWORK |
- EQUAL FOR EACH UPS | CABLES AS DELIVERED | |
- MINIMUM 3 METERS / 9.8 FEET | BOUNDING HERE | WITH THE UPS |
|
| TO LOAD |
BUS
TERMINATOR
Figure 17. Installation of parallel operating LP-U UPSs
LX: OPM_LPU_11U_5K0_10K_1US_V030 | 19 | GE DE LP 11U UPS: Installation / User Manual 3.0 (US) |