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Power for 6500 series- single, bi, or tri-phase

Hello-

I'm trying to install a 6500 series router with 3000W power supplies in South America.

The service provider has 110VAC tri-phase power at the site, and wants to run the power supplies on two of the phases- giving an effective 208VAC.

I'm wondering if the imperfect phase differential (240 degrees, not 180) between the two "hot" lines will cause problems with the power supplies- the documentation states that the units support 200-220VAC in their input specification with an effective 50-60hz frequency, but I assume this is based on normal North American 220VAC bi-phase (180 degree) power, not just pulling two phases out of a three-phase supply.

Thanks-

P

2 REPLIES
Cisco Employee

Re: Power for 6500 series- single, bi, or tri-phase

Hi P,

All Catalyst 6500 Power Supplies require a single phase source. All AC power supply inputs are fully isolated.

-Source AC can be out of phase between multiple power supplies in the same chassis, which means that PS1 can be operating from phase A and PS2 can be operating from phase B.

-Source AC can be out of phase between AC inputs on power supplies that are equipped with multiple AC inputs, which means that power cord 1 can be plugged into phase A and power cord 2 can be plugged into phase B.

Hope that clears it up.

-Bobby

Re: Power for 6500 series- single, bi, or tri-phase

Hi P,

what bthekkek says is 100% perfect, because even in our organization we have cisco 6509 with 4000W p/s, PS1 is connected in phase-A & PS2 is connected in phase-B, & it is up & running for the past 2 years with no probz.

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