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PTX3000 Power System

The PTX3000 supports single-phase AC power supply modules (PSMs) or DC PSMs.

PTX3000 Power System Description

PSM Slots

The PTX3000 has five power supply module (PSM) slots, located in the lower front of the chassis. (See PTX3000 Chassis Description.) Each PSM is inserted into one of five slots—labeled 0 through 4. For fully redundant power to the FPCs, the minimum number of PSMs must be installed as shown in Table 1 and both inputs on each required PSM must be connected and operational.

Table 1: Minimum Number of Power Supply Modules for Redundant Power

Number of PSMs

Redundant Power to the FPCs and PICs

2

Redundant power to a maximum of one FPC and one PIC, or one IPLC

3

Redundant power to a maximum of four FPCs and four PICs, or four IPLCs

4 or 5

Redundant power to a maximum of eight FPCs and eight PICs, or 16 IPLCs (or up to 8 IPLC base modules and 8 IPLC expansion modules)

When the PTX3000 is operating normally and the PSMs are switched on, load sharing between them occurs automatically. When one PSM fails or is turned off, the other PSMs immediately assume the electrical load for the system. When one PSM input fails or is disconnected on a PSM with redundant connections, the other input assumes the electrical load for that PSM.

Note:

The PTX3000 power system redundancy is N+1. For DC PSMs, the input with the highest voltage provides all the power to that PSM. If the two input feeds are within 300 mV, load sharing between inputs might occur. For AC PSMs, by default, input 1 provides all the power to that PSM—there is no load sharing between inputs.

PSM Function

The PSMs provide connections for the DC power cables or AC power cords and for voltage configuration, regulation, and filtering. The PSMs connect to the backplane, which distributes the different output voltages to the other hardware components in the chassis, depending on their voltage requirements.

PSMs Supported

The PTX3000 supports the PSMs listed in Table 2.

Table 2: Supported Power Supply Modules

Name

Spare Model Number

First Supported Junos OS Release

DC PSM

PSM-SFF-PTX-DC-S

13.2R2

AC PSM

PSM-SFF-PTX-AC-S

13.2R2

PTX3000 DC Power Supply Module Components

Figure 1 shows the DC PSM.

Figure 1: DC PSMDC PSM
  1
DC input terminals
  3
Power switch
  2
Status LEDs
  4
Input switches

Each DC PSM weighs 4.6 lb (2.1 kg) and has the following components.

  • Two 60-A inputs. labeled input 1 and input 2. Each input is labeled RTN and –48 V as shown in Figure 2.

  • DC PSM input switches as shown in Figure 3.

  • LEDs—labeled input () 1, input () 2, OK, and fault ()—to monitor the status of the PSM.

  • Power switch labeled (|) for the on position and () for the standby position.

Figure 2: DC PSM InputsDC PSM Inputs
Figure 3: DC PSM Input SwitchesDC PSM Input Switches

PTX3000 AC Power Supply Module Components

Figure 4 shows the AC PSM.

Figure 4: AC PSMAC PSM
  1
AC inputs
  3
Input switches
  2
LEDs
  4
Power switch

Each AC PSM weighs 4.5 lb (2.0 kg) and has the following components.

  • Two AC inputs labeled input 1, and input 2.

  • AC PSM input switches as shown in Figure 5.

  • Power switch labeled (|) for the on position and () for the standby position.

  • LEDs—labeled Input () 1, Input () 2, OK, and Fault ()—to monitor the status of the PSM.

Figure 5: AC PSM Input SwitchesAC PSM Input Switches

PTX3000 Power Supply Module LEDs

Figure 6 and Figure 7 show the LEDs on the power supply module faceplates. Table 3 describes the PSM LEDs.

Figure 6: DC PSM LEDsDC PSM LEDs
  1
Input () 1 LED
  3
OK LED
  2
Input () 2 LED
  4
Fault () LED
Figure 7: AC PSM LEDsAC PSM LEDs
  1
Input () 1 LED
  3
OK LED
  2
Input () 2 LED
  4
Fault () LED
Table 3: Power Supply Module LEDs

LED

Color

State

Description

Input () 1

Green

On steadily

PSM input 1 is receiving voltage.

Blinking

PSM input 1 is receiving voltage outside the range of –40 V through –72 V.

Off

PSM input 1 is not receiving voltage.

Input () 2

Green

On steadily

PSM input 2 is receiving voltage.

Blinking

PSM input 2 is receiving voltage outside the range of –40 V through –72 V.

Off

PSM input 2 is not receiving voltage.

OK

Green

On steadily

PSM is providing output voltage, and input voltage is within the supported range.

Off

Output voltage is not functioning normally because of a fault condition or the PSM is not receiving input voltage.

Fault () LED—One per power supply

Red

On steadily

PSM might be starting up, not properly installed, not receiving sufficient power, or not functioning properly.

Off

No faults have been detected for the PSM, or the PSM is not receiving any input voltage.

PTX3000 AC Power System Electrical Specifications

Table 4 lists the AC power system electrical specifications.

Table 4: AC Power System Electrical Specifications

Item

Specification

AC input voltage

Operating range: 200 through 240 VAC (nominal)

AC input line frequency

50/60 Hz (nominal)

AC input current rating (system)

52 A @ 200 VAC

40 A @ 240 VAC

Note:

This is the maximum limit for the PTX3000 power system with five PSMs installed—one PSM is reserved for redundancy. To determine the actual power consumption for your configuration, use the information provided in Calculating PTX3000 Power Consumption.

PTX3000 AC Power Supply Module Specifications

Table 5 lists the AC power supply module (PSM) specifications.

Table 5: AC PSM Electrical Specifications

Item

Specification

Maximum output power

2200 W

AC input voltage

Operating range: 200 through 240 VAC (nominal)

AC input line frequency

50/60 Hz (nominal)

AC input current rating

13 A @ 200 VAC maximum

10 A @ 240 VAC maximum

Efficiency

Approximately 90% at full load and nominal voltage

PTX3000 AC Power Cord Specifications

Most sites distribute power through a main conduit that leads to frame-mounted power distribution panels, one of which can be located at the top of the rack that houses the router. An AC power cord connects the power supply modules to the power distribution panel. Detachable AC power cords, each 4.5 m (approximately 14.75 ft) long, are supplied with the router and PSMs. The appliance coupler at the socket end of the cord inserts into the appliance inlet on the AC power supply module. The coupler is type C19 (left-angle) as described by International Electrotechnical Commission (IEC) standard 60320, except for the CBL-PTX-LA-US-C20 model number, which has a C21 (left-angle) coupler. The plug end of the power cord fits into the power source receptacle for your geographical location.

Note:

In North America, AC power cords must not exceed 4.5 m (approximately 14.75 ft) in length, to comply with National Electrical Code (NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52, and Canadian Electrical Code (CEC) Section 4-010(3). The cords supplied with the router are in compliance.

Table 6 provides specifications for the AC power cords.

Table 6: AC Power Cord Specifications

Region

Model Number

Electrical Specification

Plug Type

Graphic

Australia

CBL-PTX-LA-AU

16 A @ 250 VAC

AS/NZS 4417

China

CBL-PTX-LA-CH

16 A @ 250 VAC

GB2099

Europe (except Denmark, Italy, Switzerland, and United Kingdom)

CBL-PTX-LA-EU

16 A @ 250 VAC

CEE 7/7

International

CBL-PTX-LA-INTL

16 A @ 250 VAC

IEC 60309

Italy

CBL-PTX-LA-IT

16 A @ 250 VAC

CEI 23-16

Japan

CBL-PTX-LA-JP

20 A @ 250 VAC

Locking NEMA L6-20P

North America

CBL-PTX-LA-US

20 A @ 250 VAC

NEMA 6-20P

North America, jumper

CBL-PTX-LA-US-C20

20 A @ 250 VAC

IEC 60320 C20

North America, locking

CBL-PTX-LA-US-L

20 A @ 250 VAC

NEMA L6-20P

United Kingdom

CBL-PTX-LA-UK

13 A @ 250 VAC

BS 1363

Warning:

The router is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal (sized for UNC 1/4-20 ground lugs) provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earthing terminal must be permanently connected to earth.

Warning:

Power cords must not block access to device components or drape where people could trip on them.

PTX3000 DC Power System Electrical Specifications

Table 7 lists the DC power system electrical specifications.

Table 7: DC Power System Electrical Specifications

Item

Specification

DC input voltage

Operating range: –40.0 through –72.0 VDC

DC input current rating (system)

204 A @ –48 VDC (nominal)

164 A @ –60 VDC (nominal)

Note:

This is the maximum limit for the PTX3000 power system with five PSMs installed—one PSM is reserved for redundancy. To determine the actual power consumption for your configuration, use the information provided in Calculating PTX3000 Power Consumption.

For each input, we recommend that you provision 51 A @ –48 V. Doing so enables you to operate the PTX3000 in any configuration without upgrading the power infrastructure. You must provision a circuit breaker for each DC PSM input rated for at least 125% of the continuous current that the system draws at –48 VDC.

PTX3000 DC Power Supply Module Specifications

Table 8 lists the DC power supply module (PSM) electrical specifications.

Table 8: DC PSM Electrical Specifications

Item

Specification

Maximum output power

2200 W

DC input voltage

Operating range: –40.0 through –72.0 VDC

Nominal: –48 VDC, –60 VDC

DC input current rating

51 A @ –48 VDC (nominal) per input

41 A @ –60 VDC (nominal) per input

Efficiency

Approximately 90% at full load and nominal voltage

PTX3000 DC Power Cable and Lugs Specifications

DC Power Cables

You must supply the DC power cables that meet the specifications in Table 9, or as required by the local code, laws, and standards.

Table 9: DC Power Cable Specifications

Cable

Specification

Minimum size cable

6-AWG (13.3 mm2) minimum

Maximum size cable

4-AWG (21.2 mm2)

Warning:

For field-wiring connections, use copper conductors only.

Warning:

DC Power cables must not block access to PTX3000 components or drape where people could trip on them.

CAUTION:

Before PTX3000 installation begins, a licensed electrician must attach a cable lug to the power cables that you supply. A cable with an incorrectly attached lug can damage the PTX3000.

CAUTION:

You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (–) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each PSM.

DC Power Lugs

The accessory box shipped with the PTX3000 includes the cable lugs that attach to the terminal studs of each PSM. (The cable lug shown in Figure 8 is also used for the grounding the chassis.) The cable lugs are dual hole, and sized to fit 1/4-20 UNC terminal studs at 15.86-mm (0.625-in.) center line.

Figure 8: DC Power Cable LugDC Power Cable Lug

PTX3000 DC Power Distribution

Most sites distribute DC power through a main conduit that leads to frame-mounted DC power distribution panels, one of which might be located at the top of the rack that houses the PTX3000. A pair of cables (one input and one return) connects each set of terminal studs to the power distribution panel.

Note:

On each PSM, one input must be powered by dedicated power feeds derived from feed A, and the other input must be powered by dedicated power feeds derived from feed B. Input 1 on all PSMs must be powered from the same power feed. Input 2 on all PSMs must be powered from a different power feed from input 1. This configuration provides the commonly deployed A/B feed redundancy for the system.

Figure 9 shows a typical DC source cabling arrangement.

Figure 9: Typical DC Source Cabling to the PTX3000Typical DC Source Cabling to the PTX3000