ieee update - lightning protection institute...2014/12/07  · ieee std 1100tm-2005 ieee c62.72 ieee...

16
LABORATORIES 3/16/2007 1 LPI 2007 West Palm Beach IEEE Update LPI Annual Meeting March 16,2007 William Bush Director of Research – Power & Grounding Panduit Labs Panduit Corp, New Lenox, IL [email protected]; [email protected] 815-485-1800 x2283

Upload: others

Post on 11-Mar-2021

24 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 1LPI 2007 West Palm Beach

IEEE UpdateLPI Annual Meeting

March 16,2007William Bush

Director of Research – Power & Grounding

Panduit LabsPanduit Corp, New Lenox, IL

[email protected]; [email protected] x2283

Page 2: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 2LPI 2007 West Palm Beach

IEEE Activity

IEEE Std 1100TM-2005

IEEE C62.72

IEEE Guide – Protecting Residential

IEEE SPDC (including 10x350 Forum)

Page 3: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 3LPI 2007 West Palm Beach

IEEE Activity - 2

IEEE papers

IEEE meeting minutes

Other

Page 4: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 4LPI 2007 West Palm Beach

Human safety first

Page 5: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 5LPI 2007 West Palm Beach

See clip

Engineers at work

From Internet; Courtesy Dilbert, Comedy Central

Page 6: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 6LPI 2007 West Palm Beach

Grounding and bonding

GroundingBonding

Grounded

Bonded

Grounded

Bonded

Grounding

Bonding

Grounded

Page 7: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 7LPI 2007 West Palm Beach

Grounding frequencies

Power system sub-harmonics and offset (dc to 60 Hz)Power system harmonics (from 120 up to 3 kHz)Analog communication circuits (from a few up to hundreds of kHz)

Single point grounding for low voltage level circuitsHigh-speed digital circuits (high kHz to GHz)

Single and multi-layer planes (common surface) on PCB

Page 8: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 8LPI 2007 West Palm Beach

Purposes of G&B

1) SafetyReduce fire hazardPrevent electric shock Avoid equipment damage

3) PerformanceControl current pathsEqualize voltage referenceReduce communication noise

2) Lightning and Surge MitigationControl transientsRemove static charge Bond between all services Equalize surge reference points

Page 9: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 9LPI 2007 West Palm Beach

Grounding myths

Myth1. Current takes the path

of least resistance

2. Ac and dc “noise”goes into the earth ground and stays there

3. Lightning never strikes twice in the same place

Fact1. Current paths are

controlled by impedance

2. Currents into the earth always return to source (lightning and static discharge are a special large-scale case)

3. Lightning strike is an independent (probability) event

Page 10: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 10LPI 2007 West Palm Beach

NFPA 70 vs. 780

Page 11: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 11LPI 2007 West Palm Beach

Special concern - headsets

Page 12: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 12LPI 2007 West Palm Beach

Ground loop

Page 13: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 13LPI 2007 West Palm Beach

Ground loop - 2

Page 14: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 14LPI 2007 West Palm Beach

Common bonding network

Page 15: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 15LPI 2007 West Palm Beach

Conducted Z variation

0

50

100

150

200

0 1 2 3 4 5 6

Frequency MHz

Impedance OHMS Inter-cabinet signal-common impedance

Ground WireGround Wire andSRG

Ref. CDC

Page 16: IEEE Update - Lightning Protection Institute...2014/12/07  · IEEE Std 1100TM-2005 IEEE C62.72 IEEE Guide – Protecting Residential IEEE SPDC (including 10x350 Forum) LABORATORIES

LABORATORIES

3/16/2007 16LPI 2007 West Palm Beach

Reflection