i3070series6_Site_Preparation+11-12.3.pdf.pdf - 第39页
Power Requirements 6 Site Preparation 6-7 Connecting Power to the PDU Connect the system inlet cabl e to the ci r cuit br eaker at the insta llation si te. 3PD/ 3PY 3PN WIRE CHART BLK X RED Y ORG Z WHT W GRN G PLUG TERM …
6-6 Site Preparation
6 Power Requirements
Basic Power Quality Survey
Power quality can affect system performance differently. The following procedure
is intended as a guideline and may not be the total solution. Failure to meet these
guidelines should serve as an indicator that a power quality consultant might be
needed to conduct a more in-depth power quality survey.
1 With the system operating, measure harmonic distortion at the system-input
connection. THD should be less than 5% and less than 3% for any single
harmonic.
2 With the system operating, measure the ground-to-neutral voltage at the
system-input connection; the voltage should be less than 4vp-p.
3 Turn the system power off and measure the line voltage at the system-input
connection; record this reading. Turn the system on and begin operating mode.
Measure the line voltage at the system-input connection again. The difference
between the two measurements should be less than 2%.
Other problematic power qualities include momentary voltage interruptions,
ground noise, and voltage spikes. A survey of these problems and others may
require the services of a power quality expert with specialized equipment.
Power Requirements 6
Site Preparation 6-7
Connecting Power to the PDU
Connect the system inlet cable to the circuit breaker at the installation site.
3PD/ 3PY
3PN
WIRE CHART
BLK X
RED Y
ORG Z
WHT W
GRN G
PLUG TERMINAL ID USE WIRE COLOR
N NEUTRAL BLUE
L1 PHASE 1 BROWN
L2 PHASE 2 GREY
L3 PHASE 3 BLACK
G GROUND GREEN
6-8 Site Preparation
6 Power Requirements
Is PDU Re-wiring Necessary?
Re-wiring the PDU is necessary only if you are connecting it to a different power
configuration than it was wired for, not merely a different voltage. Delta (3PD) and
Wye (3PY) are equivalent configurations.
See Table 6-2 and the examples below.
Suppose your system’s PDU is wired for 220 volts wye (option 3PY) and you want
to connect it to:
• 208 volts wye (option 3PY)
No re-wiring is necessary; this is merely a voltage change and all internal
components will handle 200 to 240 volts.
• 220 volts delta (option 3PD)
No re-wiring is necessary; options 3PY and 3PD have the same internal wiring.
• 220 volts wye with neutral (opt 3PN)
Re-wiring is necessary because the internal circuits are wired phase-to-phase
and the internal components would experience over-voltage. Whenever you
switch from a non-neutral to a neutral configuration, or vice versa, you must
re-wire the PDU.
1. Regardless of the power option, the internal system components always operate at 200–
240 volts.
If you determine that re-wiring the PDU is necessary, see the PDU Wiring Diagrams.
Table 6-2 Power Options / Configurations
Power Options Configuration Description
1
3PD 200–240 volts 3-phase Delta (50/60Hz)
Includes 200V, 220V, 230V, 240V
3PY 208–220 volts 3-phase Wye (50/60Hz)
Includes 208V, 220V
3PN 380–415 volts 3-phase Wye with Neutral (50/60Hz)
Includes 380V, 400V, 415V