Acoustic Noise; Electrical Requirements; Ds4800 Storage Subsystem Operational Vibration Specifications; Ds4800 Storage Subsystem Sound Levels - IBM DS4800 Installation, User And Maintenance Manual

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Electrical requirements

Table 13. DS4800 Storage Subsystem operational vibration specifications
Parameter
Frequency sweep
Wave form

Acoustic noise

Table 14 lists the maximum sound levels emitted by the storage subsystem.
Table 14. DS4800 Storage Subsystem sound levels
Measurement
Sound power (normal operation)
Sound pressure (normal operation)
These levels are measured in controlled acoustical environments according to ISO
7779 and are reported in accordance with ISO 9296. The declared sound power
levels indicate an upper limit, below which a large portion of machines operate.
Sound pressure levels in your location might exceed the average 1-meter values
stated because of room reflections and other nearby noise.
This section provides information regarding site power and wiring, storage
subsystem AC power requirements, and power cord routing instructions.
Consider the following information when preparing the DS4800 Storage Subsystem
installation site:
v Protective ground – Site wiring must include a protective ground connection to
the AC power source.
Note: Protective ground is also known as safety ground or chassis ground.
v Circuit overloading – Power circuits and associated circuit breakers must provide
sufficient power and overload protection. To prevent possible damage to the unit,
isolate its power source from large switching loads (such as air conditioning
motors, elevator motors, and factory loads).
v Power failures – If a total power failure occurs, the unit automatically performs a
power-up recovery sequence without operator intervention after power is
restored.
Table 15. IBM System Storage DS4800 AC power requirements
Nominal Voltage
Voltage
Frequency (Hertz)
Minimum Operating Current
Maximum Operating Current
Maximum Surge Current
Value
5 Hz - 150 Hz - 5 Hz
Sinusoidal, 0.25 g
Level
6.0 bels
60 dBA
Low Range
110
90 to 132 VAC
50 to 60 Hz
a
3.0 A
a
3.0 A
a
4.0 A
High Range
220
198 to 264 VAC
50 to 60 Hz
b
1.5 A
b
1.5 A
b
2.0 A
Chapter 1. Introduction
25