External Connection
4.8.2 Emergency Power Off (EPO) for UPS
UPS systems installed in a computer room MUST have external batteries with EPO trip- function in Battery Breaker Box and in switch gear.
System Configuration for Dual Utility
Q3
Utility 2 | Load |
Q10
Input
UPS Output
Utility 1 | Input |
Q1
Q2
External DC
Dual Utility Matrix
DC | Utility 2 | Utility 1 | Possible UPS operation | Tripping | Note |
|
|
| modes | Supply |
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|
|
|
|
|
|
0 | 0 | 0 | Off | 0 | Nothing to trip |
|
|
|
|
|
|
0 | 0 | 1 | X |
| Under |
|
|
|
|
| installation only |
|
|
|
|
|
|
0 | 1 | 0 | Bypass operation only | 1 |
|
|
|
|
|
|
|
0 | 1 | 1 | Bypass operation only | 1 |
|
|
|
|
|
|
|
1 | 0 | 0 | Battery operation only | 1 |
|
|
|
|
|
|
|
1 | 0 | 1 | Normal/battery operation | 1 |
|
|
|
|
|
|
|
1 | 1 | 0 | Bypass/battery operation | 1 |
|
|
|
|
|
|
|
1 | 1 | 1 | Normal/bypass/battery | 1 |
|
|
|
| operation |
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|
44 | Installation Guide APC Silcon |
