RE: Frame Surge Test applicability

2001-11-27 Thread Mark Pascarelli 

David,
Our customer requested that the Power Supply comply to Section
9.10.6 of the GR-1089-Core Specification.

 
Mark Pascarelli
Electrical Engineer
Carlo Gavazzi, Inc.

-Original Message-
From:   David Heald [SMTP:davehe...@mediaone.net]
Sent:   Tuesday, November 27, 2001 9:52 AM
To: Mark Pascarelli
Cc: 'emc-pstc'
Subject:Frame Surge Test applicability

Mark,
  Is this section applicable to your product?  Section 9.10 only
applies
to equipment that was formerly installed in an IBN system (now in a
CBN), and newer products rarely fall into this category.  At my last
job, I performed a lot of GR-1089 evaluations and 95% of the
products
were exempt from 9.10.  The only products I saw that fell into this
category was some old 80's era boxes that had new cards to allow
updated
functionality (almost impossible to get them EMI compliant due to
the
initial design for LOW bandwidth  isolated shield grounds, but we
got
it.)  

Best Regards,
Dave

Mark Pascarelli wrote:
 
 Hi all,
 
 I am trying to re-design our current power supply to meet
GR-1089-Core
 Specification.
 The Power Supply has a -48V input and 5VDC/100W, 5VDC/100W and
12VDC/150W
 Output.
 
 Based on current testing, we did not comply with Section 9.10.6
Frame Surge
 Test.
 This test applies a surge current as defined in IEEE C62.41.  The
filter
 capacitor was destroyed during this test. The capacitor is rated
at 100V.  I
 think this capacitor should be replaced with a higher voltage X or
Y
 capacitor.  Possibly a GDT or TVS is required.
 
 If anyone can help, I will email a portion of the schematic in PDF
format.
 
 Thank you,
 
 Mark Pascarelli
 Electrical Engineer
 Carlo Gavazzi, Inc.
 
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Frame Surge Test applicability

2001-11-27 Thread David Heald 

Mark,
  Is this section applicable to your product?  Section 9.10 only applies
to equipment that was formerly installed in an IBN system (now in a
CBN), and newer products rarely fall into this category.  At my last
job, I performed a lot of GR-1089 evaluations and 95% of the products
were exempt from 9.10.  The only products I saw that fell into this
category was some old 80's era boxes that had new cards to allow updated
functionality (almost impossible to get them EMI compliant due to the
initial design for LOW bandwidth  isolated shield grounds, but we got
it.)  

Best Regards,
Dave

Mark Pascarelli wrote:
 
 Hi all,
 
 I am trying to re-design our current power supply to meet GR-1089-Core
 Specification.
 The Power Supply has a -48V input and 5VDC/100W, 5VDC/100W and 12VDC/150W
 Output.
 
 Based on current testing, we did not comply with Section 9.10.6 Frame Surge
 Test.
 This test applies a surge current as defined in IEEE C62.41.  The filter
 capacitor was destroyed during this test. The capacitor is rated at 100V.  I
 think this capacitor should be replaced with a higher voltage X or Y
 capacitor.  Possibly a GDT or TVS is required.
 
 If anyone can help, I will email a portion of the schematic in PDF format.
 
 Thank you,
 
 Mark Pascarelli
 Electrical Engineer
 Carlo Gavazzi, Inc.
 
 ---
 This message is from the IEEE EMC Society Product Safety
 Technical Committee emc-pstc discussion list.
 
 Visit our web site at:  http://www.ewh.ieee.org/soc/emcs/pstc/
 
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  majord...@ieee.org
 with the single line:
  unsubscribe emc-pstc
 
 For help, send mail to the list administrators:
  Michael Garretson:pstc_ad...@garretson.org
  Dave Healddavehe...@mediaone.net
 
 For policy questions, send mail to:
  Richard Nute:   ri...@ieee.org
  Jim Bacher: j.bac...@ieee.org
 
 All emc-pstc postings are archived and searchable on the web at:
 No longer online until our new server is brought online and the old 
 messages are imported into the new server.

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Technical Committee emc-pstc discussion list.

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