T640 Three-Phase Delta And Wye Ac Power Supply Description; Three-Phase Delta Ac Power Supply; Table 61: Six-Input Dc Power Supply Leds - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
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T640 Three-Phase Delta and Wye AC Power Supply Description

Three-Phase Delta AC Power Supply

106

Table 61: Six-Input DC Power Supply LEDs

LED Color
Green
INPUT
—One
PRESENT
per input
DC OK —One per Blue
power supply
Yellow
OVER
TEMP —One per
power supply
T640 Six-Input DC Power Supply Description on page 104
Maintaining the T640 Power Supplies on page 456
T640 LED Overview on page 464
Troubleshooting the T640 Power System on page 476
Replacing a T640 Six-Input DC Power Supply on page 380
Three-Phase Delta AC Power Supply on page 106
Three-Phase Wye AC Power Supply on page 108
AC Power Supply Load Sharing and Fault Tolerance on page 109
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 42 on page 107
State Description
On steadily Input is receiving voltage.
Off Input voltage is not present.
On steadily When all inputs are properly
energized, the
that the power supply is functioning
normally.
Blinking Either the power supply is starting
up, or it is not functioning, not
properly installed, or not operating
properly.
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
shows the three-phase delta AC power supply.
Copyright © 2017, Juniper Networks, Inc.
LED indicates
DC OK
. The
GND
, and , from left to
L3