Service manual

System Overview 1-97
Figure 1–44 shows both the front and rear of the AC input box used in
GS160/320 systems. Three phase AC input power is used in these systems.
There are two variants:
• The 30-48848-01 used in North America/Japan provides 3 phase 30 amp. 120/208V
power.
• The 30-48848-02 used in Europe provides 3 phase 30 amp. 380-415V power.
There is no visual difference between the two variants except the power cord
plug. The box has a main circuit breaker that protects all power to the system
and branch circuit breakers that protect power to the 48V power supplies and to
PCIs and storage devices. Loads must be distributed across the three phases to
avoid nuisance tripping of circuit breakers. See the power distribution rules in
Appendix A.
Two AC input boxes are required.
The LEDs, marked L1, L2, L3, when lit indicate the presence of each phase of
the 3-phase AC input.
Table 1–13 shows which outlet each circuit breaker protects.
Table 1– 13 Circuit Breaker Line Protection (Three Phase)
Circuit Breaker Rating (amps) Outlets Protected
CB1 30 All
CB2 15 J1
CB3 15 J2
CB4 15 J3
CB5 15 J4
CB6 15 J5
CB7 15 J6
CB8 15 J7 – J10
CB9 15 J11 – J14
CB10 15 J15 – J18
CB11 15 J19 – J22