T640 Three-Phase Delta And Wye Ac Power Supply Overview; Three-Phase Delta Ac Power Supply Description; Figure 32: Three-Phase Delta Ac Power Supply - Juniper T640 Hardware Manual

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T640 Three-Phase Delta and Wye AC Power Supply Overview

Copyright © 2010, Juniper Networks, Inc.
Table 23: Four-Input 240-A DC Power Supply LEDs (continued)
LED Color
Yellow
OVER
—One per
TEMP
power supply
T640 Four-Input 240-A DC Power Supply Overview on page 55
Maintaining the T640 Power Supplies on page 159
Troubleshooting the T640 Power System on page 171
Replacing a T640 Four-Input 240-A DC Power Supply on page 254
Three-Phase Delta AC Power Supply Description on page 57
Three-Phase Wye AC Power Supply Description on page 58
AC Power Supply Load Sharing and Fault Tolerance on page 59

Three-Phase Delta AC Power Supply Description

Each three-phase delta AC power supply weighs approximately 31.0 lb (14.06 kg). A
metal wiring compartment contains the AC terminal block and ground labeled
AC terminal block consists of three input terminals labeled
right. The power switch provides power to the router. Each power supply's cooling system
consists of two fans, a front air filter, and a side air filter. LEDs provide the status of the
power supply. Figure 32 on page 57 shows the three-phase delta AC power supply.

Figure 32: Three-Phase Delta AC Power Supply

Figure 33 on page 58 shows the three-phase delta AC power supply connections.
Chapter 3: T640 Router Hardware Component Overview
State Description
On steadily Power supply has exceeded
recommended temperature.
Off Power supply is within the
recommended temperature or the
power supply is not on.
L1 , L2
. The
GND
, and L3 , from left to
57