...@ieee.org
Subject: RE: Hot Swappable Power Supplies ?
I'm curious...
How is in-rush current handled for these connectors?
Seems like it would be somewhat easy to specify that a connector is good for
hot swapping a device that draws X Amps of current.
It's the in-rush that would be hard
: Tania Grant [SMTP:taniagr...@msn.com]
Sent: Saturday, June 23, 2001 1:59 AM
To: Gary McInturff; 'wo...@sensormatic.com'; emc-p...@ieee.org
Subject: Re: Hot Swappable Power Supplies ?
Gary, and all,
In my experience, the only sure way is to request the UL Report and read
oe133wwsorkbpg1kiae00037...@hotmail.com, Tania Grant
taniagr...@msn.com inimitably wrote:
I was quacking in my sandals
You were expecting to have to duck when the fertilizer hit the fan?
--
Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839
Fax +44 (0)1268 777124.
!)
Tania Grant
taniagr...@msn.com
- Original Message -
From: Gary McInturff
Sent: Friday, June 22, 2001 3:59 PM
To: 'wo...@sensormatic.com'; emc-p...@ieee.org
Subject: RE: Hot Swappable Power Supplies ?
Richard,
I'm a little less ebullient today than yesterday. Recognized
Hot-swappable
...@sensormatic.com]
Sent: Thursday, June 21, 2001 9:30 AM
To: emc-p...@ieee.org
Subject: RE: Hot Swappable Power Supplies ?
Gary, is the hot swappable approval included in the UL Conditions of
Acceptability or is a different component category?
Richard Woods
--
From: Gary
- Original Message -
From: John Woodgate
Sent: Thursday, June 21, 2001 6:15 AM
To: emc-p...@majordomo.ieee.org
Subject: Re: Hot Swappable Power Supplies ?
oe49kqvsdtdh2iwpj5td...@hotmail.com, Tania Grant
taniagr...@msn.com inimitably wrote:
However, the CSA evaluating engineer made us
To: 'Lesmeister, Glenn'; emc-p...@ieee.org
Subject: RE: Hot Swappable Power Supplies ?
They have hot swappable connectors that have already been
subjected to the
test as part of the component recognition, but I don't remember the
CCN
number.
-Original Message
...@ieee.org
Subject: RE: Hot Swappable Power Supplies ?
Richard,
What is the test plan for making and breaking under load? In general, power
supplies take a little bit of time to start up, so making contact under load
is not going to be an issue. UL has specified a 200 cycle disconnect test
Subject: Re: Hot Swappable Power Supplies ?
Another UL specific test to consider it the Connector Current
Interrupt Test.
Hot plug your device 200 times and recheck the dielectric strength and
earth
path. It is a new UL requirements and the test sheet currently does
not have a
number
:RE: Hot Swappable Power Supplies ?
We are currently evaluating a system with hot swappable power supplies and
PCBs and here is what we have found needs to be checked:
o Earthing pin makes first and breaks last
o Primary and secondary power connectors are rated for make/break
Here are several 60950 issues:
1) Are exposed hot terminals accessable when P/S is removed?
Depending on whether the power supplies are 'shared' or switchover' and
types of diode protection, there may be hazardous voltages or currents on
the connectors (check the amperage and joule availablity).
: Wednesday, June 20, 2001 5:50 PM
To: 'Dan Teninty'
Cc: 'emc-p...@ieee.org'
Subject: RE: Hot Swappable Power Supplies ?
There must be a bleeder resistor (across the X caps) to make the AC
input
pins safe to touch once the supply is removed from
oe49kqvsdtdh2iwpj5td...@hotmail.com, Tania Grant
taniagr...@msn.com inimitably wrote:
However, the CSA evaluating engineer made us place a label, such
as when the supply was pulled out, the label immediately were made
visible, that stated the usual
Swappable Power Supplies ?
There must be a bleeder resistor (across the X caps) to make the AC input
pins safe to touch once the supply is removed from the cabinet.
If there are exposed voltage or energy hazards with the supply removed,
there must be a restriction such that only trained
.
Tania Grant
taniagr...@msn.com
- Original Message -
From: Doug McKean
Sent: Wednesday, June 20, 2001 6:31 PM
To: EMC-PSTC Discussion Group
Subject: Re: Hot Swappable Power Supplies ?
What's the accessibility to pins or traces or
anything carrying hazardous energy when
a power supply
What's the accessibility to pins or traces or
anything carrying hazardous energy when
a power supply is pulled out?
- Doug
---
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site
.
Regards,
Kaz Gawrzyjal
kazimier_gawrzy...@dell.com
-Original Message-
From: Richardson, William G [mailto:william.richard...@unisys.com]
Sent: Wednesday, June 20, 2001 4:50 PM
To: 'Dan Teninty'
Cc: 'emc-p...@ieee.org'
Subject: RE: Hot Swappable Power Supplies ?
There must be a bleeder
There must be a bleeder resistor (across the X caps) to make the AC input
pins safe to touch once the supply is removed from the cabinet.
If there are exposed voltage or energy hazards with the supply removed,
there must be a restriction such that only trained personnel are instructed
to do
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