Contents

3 Installing power supplies· 3-1

Power trays and power supplies· 3-1

Installing DC power supplies· 3-1

Available DC power supplies· 3-1

DC power supply configuration guidelines· 3-2

Installing a DC power supply· 3-2

Connecting a DC power cord· 3-4

(Optional) Attaching a two-hole power lug to a DC power wire· 3-8

Installing AC power supplies· 3-8

Available AC power supplies· 3-8

AC power supply configuration guidelines· 3-9

Installing an AC power supply· 3-9

Connecting an AC power cord· 3-11

Installing HVDC power supplies· 3-12

Available HVDC power supplies· 3-12

HVDC power supply configuration guidelines· 3-12

Installing an HVDC power supply· 3-12

Connecting an HVDC power cord· 3-13

 

3 Installing power supplies

The router supports DC, AC, and high-voltage DC (HVDC) power inputs. The power supply system is composed of power trays and power supplies. The router supports four power trays and each power tray supports six power supplies. You can select power trays and power supplies as required.

Power trays and power supplies

CAUTION: Do not install power supplies of different models on the same router.

 

The power supplies are installed in the power trays. Power supplies at the front correspond to the power input ends at the rear as shown in Figure3-1.

Figure3-1 Power supplies and power input ends

 

Installing DC power supplies

Available DC power supplies

The PSR2000B-54D DC power supply is available for the router. Table3-1 describes the PSR2000B-54D DC power supply specifications.

Table3-1 PSR2000B-54D DC power supply specifications

Item	Specification
Rated input voltage	–48 to –60 VDC
Input voltage range	–39 to –72 VDC
Max. input current	60 A
Rated output voltage	54 VDC
Max. output current	37 A
Max. output power	2000 W
Compatible power tray	CR-PEM-DC2000

 

DC power supply configuration guidelines

Determine the number of DC power supplies based on the system power consumption and the DC power supply configuration based on the power input mode.

·     As a best practice, configure N+M (M ≥ 1) DC power supply redundancy. Make sure N+M is not larger than the total number of power supply slots.

N is the number of DC power supplies.

·     Make sure the total output power of the power supplies is greater than the system power consumption (with a 20% power surplus as a best practice).

·     Provide a circuit breaker or fuse for power input of each DC power supply. Make sure each input line has a current carrying capacity not less than 60 A.

Installing a DC power supply

IMPORTANT: To use fewer than 24 power supplies on the router, install them from the right slots to facilitate power cord wiring and power supply expansion.

 

To install a DC power supply:

1.     Wear an ESD wrist strap and make sure the strap makes good skin contact and is reliably grounded.

2.     Remove the filler panel from the target power supply slot.

Put your forefinger into the hole of the filler panel to hold and pull out the filler panel along the guide rails, as shown in Figure3-2.

Figure3-2 Removing a filler panel

 

3.     Correctly orient the power supply.

4.     Align the power supply with the power supply slot. Then slide the power supply along the guide rails into the slot until the latch locks the power supply in place.

Figure3-3 Installing a DC power supply

 

Connecting a DC power cord

	WARNING! ·     Before you connect a power cord, turn off the circuit breaker for it and turn off the two switches on the router. ·     Make sure each power cord has a separate circuit breaker. ·     Each power tray has a cover at the rear to protect the operators from electric shock. Before you connect a power cord, remove the cover. Reinstall the cover after connecting the power cord.

 

To prepare DC power cords yourself, attach a two-hole power lug to each DC power wire before connecting the DC power cord to the chassis. See "(Optional) Attaching a two-hole power lug to a DC power wire."

To connect a DC power cord:

1.     Remove the protective plate over the power input area, as shown in Figure3-4.

Figure3-4 Removing the protective plate

 

2.     Remove the cover on the power tray, as shown in Figure3-5.

Keep the removed cover secure and reinstall it after connecting the power cord.

Figure3-5 Removing the cover from the power tray

 

3.     Remove the screws on the terminal block.

4.     Use the screws to connect the black wires to the positive terminals marked with RTN(+) and the blue wires to the negative terminals marked with NEG(–), as shown in Figure3-6.

As a best practice, connect the DC power cords to the terminal block from left to right, as shown in Figure3-7, Figure3-8, and Figure3-9.

Figure3-6 Connecting DC power cords to the DC terminal blocks

 

Figure3-7 Connecting power cords to the terminal blocks from left to right (1)

 

Figure3-8 Connecting power cords to the terminal blocks from left to right (2)

 

Figure3-9 Connecting power cords to the terminal block from left to right (3)

 

5.     Connect the other end of the power cord to the DC power supply system.

Connect the blue wires to the negative terminals marked with –48V and the black wires to the positive terminals marked with RTN(+).

6.     Reinstall the terminal block cover and then fasten the captive screws.

Figure3-10 Reinstalling the terminal block cover

 

7.     Reinstall the protective plate over the power input area.

(Optional) Attaching a two-hole power lug to a DC power wire

CAUTION: ·     When stripping the insulation off a DC power wire, avoid damaging the metal conductors. ·     Do not touch the exposed conductors of the power wire and protect the exposed conductors from oxidation.

 

To attach a two-hole power lug to a DC power wire:

1.     As shown in Figure3-11, measure the length of the open end of the two-hole power plug. Then use a wire stripper to strip the same length of insulation off the end of the DC power wire.

2.     Slide the heat-shrink tubing onto the wire. Then slide the open end of the two-hole power lug over the exposed conductors of the power wire.

3.     Use a crimping tool to crimp the open end of the power lug tightly to the conductors of the wire.

The crimping effect varies by crimping tool.

4.     Slide the heat-shrink tubing onto the crimped part of the power lug and then use a heat gun to shrink the tubing around the power wire.

Do not use a heat gun to shrink the tubing for a long time to prevent damage to the power cord insulation.

Figure3-11 Attaching a two-hole power lug to a DC power wire

 

Installing AC power supplies

Available AC power supplies

The PSR3000B-54AHD power supply is available for the router. Table3-2 describes the PSR3000B-54AHD power supply specifications.

Table3-2 PSR3000B-54AHD power supply specifications

Item	Specification
Rated input voltage	·     100 to 130 VAC @ 60 Hz ·     200 to 240 VAC @ 50 Hz ·     240 VDC ·     336 VDC
Input voltage range	·     90 to 150 VAC @ 47 to 63 Hz ·     176 to 290 VAC @ 47 to 63 Hz ·     180 to 290 VDC ·     260 to 400 VDC
Rated input current	16 A
Rated output voltage	54 VDC
Max. output current	55.6 A
Max. output power	·     100 to 130 VAC @ 60 Hz: 1500 W ·     200 to 240 VAC @ 50 Hz: 3000 W ·     240 VDC: 3000 W ·     336 VDC: 3000 W
Compatible power tray	·     AC power input: CR-PEM-AC3000 and CR-PEM-HVDC3000 ·     240 VDC power input: CR-PEM-AC3000 and CR-PEM-HVDC3000 ·     336 VDC power input: CR-PEM-HVDC3000

 

AC power supply configuration guidelines

Determine the number of AC power supplies based on the system power consumption and the AC power supply configuration based on the power input mode.

·     As a best practice, configure N+N (dual power sources) AC power supply redundancy. Make sure N+N is not larger than the total number of power supply slots.

N is the number of AC power supplies.

·     Make sure the total output power of the power supplies is greater than the system power consumption (with a 20% power surplus as a best practice).

·     Provide a circuit breaker for power input of each AC power supply. Make sure each circuit breaker has a current rating not less than 20 A.

Installing an AC power supply

IMPORTANT: To use fewer than 24 power supplies on the router, install them from the right slots to facilitate power cord wiring and power supply expansion.

 

To install an AC power supply:

1.     Wear an ESD wrist strap and make sure the strap makes good skin contact and is reliably grounded.

2.     Put your forefinger into the hole of the filler panel and to hold and pull out the filler panel along the guide rails as shown in Figure3-12.

Figure3-12 Removing a filler panel

 

3.     Correctly orient the power supply.

4.     Align the power supply with the power supply slot. Then slide the power supply along the guide rails into the slot until the latch locks the power supply in place.

Figure3-13 Installing an AC power supply

 

Connecting an AC power cord

	WARNING! Before you connect a power cord, turn off the switch at the power input end and two switches on the router.

 

CAUTION: After connecting the power cord connector to the power tray, use the cable clamp provided with the router to secure the power cord to the AC input receptacle on the power tray.

 

To connect an AC power cord:

1.     Remove the protective plate over the power input area, as shown in Figure3-14.

Figure3-14 Removing the protective plate

 

2.     Connect the AC power cord connector to the AC input receptacle on the power tray, as shown by callout 1 in Figure3-15.

3.     Attach a cable clamp to the power tray. Release the tab on the tie mount and then slide the cable clamp forward until it is flush against the edge of the connector, as shown by callout 2 in Figure3-15.

4.     Close the cable clamp, as shown by callout 3 in Figure3-15.

Figure3-15 Connecting an AC power cord

 

5.     Connect the other end of the AC power cord to an AC power source.

Installing HVDC power supplies

Available HVDC power supplies

The PSR3000B-54AHD power supply supports AC input and HVDC input and is available for the router for HVDC input. See Table3-2 for the PSR3000B-54AHD power supply specifications.

HVDC power supply configuration guidelines

Determine the number of HVDC power supplies based on the system power consumption and the HVDC power supply configuration based on the power input mode.

·     As a best practice, configure N+N (dual power sources) HVDC power supply redundancy. Make sure N+N is not larger than the total number of power supply slots.

N is the number of HVDC power supplies.

·     Make sure the total output power of the power supplies is greater than the system power consumption (with a 20% power surplus as a best practice).

·     Provide a circuit breaker for power input of each HVDC power supply. Make sure each circuit breaker has a current rating not less than 20 A and meets the requirements for HVDC power supply, such as HVDC certification and bipolar protection.

Installing an HVDC power supply

For information about installing a PSR3000B-54AHD power supply, see "Installing an AC power supply."

Connecting an HVDC power cord

For information about connecting the power cord for a PSR3000B-54AHD power supply, see "Connecting an AC power cord."