Passport 15000-Vss Power Architecture; Power Requirements - Nortel Passport 15000 Preparation Manual

Passport 15000-VSS power architecture

Power requirements

To install an MFA150 rectifier setup, see the Astec document 167-9021-133
Advanced Power Systems MFA150 Modular Front Access Power System
Detailed Installation Guidelines and Procedures Manual.
For information about how the Astec MFA150 operates with a
Passport 15000 or 20000, see 241-1501-200 Passport 15000, 20000
Hardware Description.
Power from the site distribution panels is supplied to the Passport 15000-
Variable Speed Switch by two different methods:
• Power for the Passport 15000 node is supplied at the breaker interface
panel as described in "Power architecture" (page 120).
• Power for the Passport 7480 node is supplied directly from a disconnect
device to the Passport 7480 as described in the 16-slot Passport switch
section of 241-7401-200 Passport 7400 Hardware Description.
To meet the maximum power demands on a fully provisioned Passport 15000
or 20000 switch, Nortel Networks recommends input power to be fed by up
to 1/0 AWG (53.49 mm
feed. (The 40 A is two times the largest BIP breaker for a Passport 15000,
while the 50 A is two times the largest BIP breaker for a Passport 20000.) The
cables must meet or exceed the criteria identified in "Power cable
specifications" (page 143).
For a Passport 15000, shelf power is supplied through four feeds at a nominal
voltage of -48/-60 V dc at 20 A. Each shelf is rated at 3000 W. The maximum
current rating per feed is up to 85 to 100 A, while the minimum is 40 A. When
planning to use less than 100-A feeds, see "Power cable specifications for a
partially provisioned shelf" (page 146).
For a Passport 20000, shelf power is supplied through four feeds at a nominal
voltage of -48/-60 V dc at 20 A. Each shelf is rated at 3000 W. The maximum
current rating per feed is up to 85 to 100 A, while the minimum is 40 A. When
planning to use less than 100-A feeds, see "Power cable specifications for a
partially provisioned shelf" (page 146).
Passport 15000, 20000 Site Requirements and Preparation Guide
Chapter 4 Power and grounding preparation 121
2
) cables with a guarantee of 40 or 50 up to 100 A per
5.2S2