NORTHEAST PRODUCT SAFETY SOCIETY, INC.
-----------------------------------
P.O. Box 651, Boyston, MA 01505-0651
You are invited to the joint meeting of IEEE New England Section EMC
Chapter and Northeast Product Safety Society, Inc. on Wednesday
September 25, 1996 7:00p.m. featuring the following technical presentation:
A Close Look at the New EC Power Line Harmonics Requirements by Isidor
Straus, Curtis-Straus, Littleton, Massachusetts.
The information and refreshments are free. Be there early if you want
a good seat. The combined resources of our respective organizations,
together with a speaker the caliber of Isidor Straus on a hot subject
like designing to meet the New EC Power Line Harmonics is a sure bet to
fill the EMC Corp. auditorium.
Next month 23-Oct-96 is also a joint meeting with the Worcester Chapter
of the American Society of Safety Engineers and the technical
presentation will be DISASTER RECOVERY PLANNING by Dave Mc Daniel, the
Chief Scientist for BMS Catastrophe Special Technologies Division.
------------------------------------------------------------------
Last fall, the European Commission adopted the new IEC/CENELEC on power
line harmonics, IEC 1000-3-2/EN61000-3-2, as a mandatory requirement
under the EMC Directive. The standard restricts the harmonic
components of the current drawn by all AC mains connected equipment
operating at less than 16 Amperes per phase, and applies to all
equipment using more than 75 Watts. The EMC community knew of the
standard and expected it to be designated under the EMC Directive. The
manner in which it was adopted, however, came as a great shock: there
was virtually no transition period. Equipment was expected to comply
with the new requirements as of the beginning of 1996. The standard
way of designing electronic power supplies-both linear and switching,
was essentially outlawed overnight! The authorities are working to
soften the blow by introducing a transition period, but the fact
remains that in the near future, if not immediately, electronic
equipment must be designed with the harmonic requirements in mind. This
knowledge has caused a lot of consternation in the EMC community.
Electronic power supplies commonly incorporate full-wave diode
rectification and a bulk storage capacitor as the input to further
linear or switching regulation circuitry. It is the threshold action
of these components that causes current to flow in a narrow period near
the peak of the applied mains voltage. The addition of an additional
pulse-width modulated inductor can change this current profile, but
that technology is not yet widely disseminated and will initially
command a premium. At this time, it is important to know whether or
not a product actually needs to have a specially engineered power
supply, or if it can use an older one. Although the standard
technically applies to equipment drawing more than 75 Watts
(approximately 1/3 Ampere), in fact a more careful analysis shows that
equipment drawing substantially more power-up to nearly 200 Watts--can
still meet the harmonic requirements.
The 75 Watt level is not a "cast in stone" limit-it is used because it
contains a large enough safety margin that equipment at that level is
so unlikely to fail the requirements as to not be worth testing. The
talk presents a mathematical analysis which profiles equipment harmonic
currents as a function of RMS current and conduction phase angle.
These parameters can easily be measured with common equipment. Armed
with this information, it is possible to decide early in the design
cycle whether the new harmonic requirements will impose any hardship.
Isidor Straus has been professionally involved with product compliance
issues, with an emphasis on electromagnetic compatibility matters,
since 1977. He is presently the Chief Scientist at Curtis-Straus, LLC,
of Littleton, Massachusetts. Curtis-Straus provides a wide range of
regulatory testing and consulting services. He also serves as a
managing editor of the periodical Compliance Engineering. Previously,
he was a co-founder of Dash, Straus, and Goodhue, Inc., where he was
Vice President of Engineering until 1988. Mr. Straus holds a BSEE from
M. I. T., and a Master's of Science degree in finance from Boston
College. Mr. Straus is also registered as a Professional Engineer in
Massachusetts.
Directions: The meeting will take place at EMC Corporation on September
25, 1996 at 7 p.m. We gather at EMC at 7:00 p.m. for networking and
munchies, courtesy of EMC, the technical meeting starts at 7:30 pm. EMC
Corporation is located in Hopkinton, Massachusetts. Take Route 495 to
Exit 21B. Bear right at the bottom of the ramp and turn left onto
South Street at the traffic light. EMC Corporation's Training Facility
is located at 42 South Street, which is the first right after turning
onto South Street. The meeting will be held in the EMC's Customer
Briefing Center.
Prior to the meeting, socializing will be at O'Tooles Pub/North Pond
House on South Street, on the right side, about a 1/2 mile past EMC's
Customer Briefing Center from 5:00 to 6:45 p.m., where food and drink
may be purchased.
For more information, please call Mirko Matejic at (508) 549-3185.
Further information on NPSS, Inc. can be found at:
http://www.safetylink.com/npss.html
Further information on IEEE EMC Society and link to many related sites
can be found at: http://www.emclab.umr.edu/ieee_emc/
----- End Included Message -----
----- Begin Included Message -----
>From [email protected] Fri Aug 23 13:48:07 1996
From: Dave McDaniel <[email protected]>
To: "'[email protected]'" <[email protected]>
Subject: RE: Resume & Abstract for Joint Meeting of NPSS and ASSE 23-Oct-96
List-Post: [email protected]
Date: Fri, 23 Aug 1996 12:46:12 -0500
Return-Receipt-To: <[email protected]>
X-Mailer: Microsoft Exchange Server Internet Mail Connector Version 4.0.837.3
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Content-Length: 3842
BIOGRAPHY
DAVE MC DANIEL is Chief Scientist for BMS Catastrophe Special
Technologies Division. He is responsible for post loss analysis,
recommendations for recovery procedures, protocols and remediation. He
has been personally involved in most major disasters in the U.S. in the
last five years. He has assessed damage to equipment and implemented
chemical cleaning protocols at major loss sites involving government
and private industry data computing centers, telecommunication
switching systems, laboratory instrumentation, network systems and
manufacturing facilities. He often acts as a consultant to major
insurance companies on the effects of fire and water on electronic
equipment, documents, and other contents.
His background includes 11 years as a member of technical staff at Bell
Labs Digital Transmission Division, 9 years as Engineering Manager for
SIE Geosource and 3 years as Research Director of PCES. His background
has provided him with an in depth understanding of electronics design,
imaging, and the role of software in today's instrumentation. This
understanding allows intimate interaction in the planning of
recertification methods.
He is a current member of ASTM Committee E05 on Fire Sciences, member
of the IEEE Computer Society, Faculty Member Zurich American Risk
Engineering Management Training, and Editorial Review Board member for
the Disaster Recovery Journal. He maintains close ties with industry
laboratories working on corrosivity and other non-thermal damage
analysis and restoration techniques. Articles by Mr. Mc Daniel have
appeared in the Disaster Recovery Journal, Survive The Business
Continuity Magazine, and Communications News.
Contact at: BMS Catastrophe
303 Arthur Street
Fort Worth, TX 76107
800/ 433-2940
email to [email protected]
DISASTER RECOVERY PLANNING
Fire Safety Engineers must be ready to respond to any disaster from a
water leak to a terrorist bombing. They must have their plan in place
before any incident and the disaster assessment / response team ready.
The topic of disaster response planning is briefly introduced from a
restoration perspective. The condition of the building and contents
must be stabilized to avoid loss of vital documents, computers,
telecommunication systems, and furniture. Actions required are
presented using case histories such as the Oklahoma City bombing and the
World Trade Center explosion. The threat of fire byproducts is
presented by defining the common types of chemicals formed and the
mitigation of loss is covered. State of the art restoration techniques
for electronics, industrial equipment, and documents will be shown.
DISASTER RESPONSE
OUTLINE 1
I. WHAT CAN HAPPEN? REGIONAL VS SINGULAR
A. FIRE
B. HURRICANE
C. FLOOD
D. EARTHQUAKE
E. EXPLOSION
F. PIPE BREAKS
II. WHAT ARE THE CONTAMINANTS FROM EACH?
A. FIRE
1. SPECIFIC CORROSIVES
a) BUILDING MATERIALS & CONTENTS
b) DRY FIRE SUPPRESSANTS
2. HEAT
B. WATER
1. IONIC CONTAMINANTS
2. ACIDITY
C. WIND
D. EARTHQUAKE
III. WHAT ARE THE DESTRUCTIVE MECHANISMS?
A. CORROSION
B. PARTICULATE CONTAMINATION
C. HEAT
1. OPERATIONAL - DYNAMIC TIME & TEMP
2. LIMITS
3. INDICATORS
D. WATER DAMAGE
1. ELECTRONICS
2. DOCUMENTS
3. BUILDING STRUCTURE
IV. WHAT CAN BE DONE?
A. SHORT TERM
1. STABILIZATION
2. RESPONSE
3. INVOKING THE RECOVERY PLAN
B. LONGER TERM
1. SYSTEMATIC ATTACK
a) PRIORITIES FIRST
b) IDENTIFICATION OF CONTAMINANTS
c) PLANNED CLEANING REGIMEN
d) STORAGE MEDIA DATA RECOVERY
2. REMOVAL OF CONTAMINANTS & NEUTRALIZATION
3. RECERTIFICATION
V. PRELOSS MINIMIZATION OF DAMAGE
1. DOCUMENT BACKUP
2. BUILDING SYSTEMS
3. CONTINGENCY PLANNING
VI. CASE HISTORY DISCUSSIONS
----- End Included Message -----
