Lightning Conductor in New Era
PDCE
Lightning conductor to stop lightning hit
Ｐ
Ｐａｒａｒｒａｙｏｓ
Ｄ
Ｄｅｓｉｏｎｎｉｚａｄｏｒ
Ｃ
Ｃａｒｇｅ
Ｅ
Ｅｌｅｃｔｒｏｓｔａｔｉｃａ
October 8, 2012 English V.1.0
History of Lightning conductor and the problem
１７５２
Invented by
Benjamin Franklin
130 years
130 years
1881
Edison Light&
Electricity Company
１８９９
２０１１
Radio invented
by Marconi
Lightning Rod
Why do we depend on 260 years old technology?
Now our life depend so
much on Electricity
Serious side effect problem
by receiving strong current
by Lightning against Network
Two problems unsolved by Lightning rod
Safest way is NOT to receive
1. Can not catch 100% of lightning.
2. The current running surface of ground cause damage to lightning current
Electrical devices
Oil Lump
Principal of PDCE (1)
Assumption
+ + + +
------+ + + +
＋ ＋
＋ ＋
＋ ＋ ＋＋＋ ＋ ＋＋＋ ＋ ＋ ＋
Rain drop with negative
charge absorb positive
charge on surface
------------+ + + +
＋ ＋
＋ ＋
＋ ＋
＋ ＋
Principle of PDCE (2)
-------
+ + + +
Many mark on lower
side means that this side
has Positive charge
＋ ＋
＋ ＋
Proof
Very few mark on
upper side means
that this side has
Negative charge
Principle of PDCE (3)
1) Positive charge on
upper part of the cloud
and Negative charge
lower part of the cloud
＋＋＋ ＋＋＋
３）Upper part must be
Positive at first but
discharged by negative rain
drops and become Negative
＋＋＋ ＋＋＋
－－－ －－－
－－－－－－
2) The other side of cloud
get Positive charge
introduced through
insulating material , air.
Atmosphere
－－－－－－
Insulator
( Insulator)
＋＋＋＋＋＋
No Streamer goes up
Round surface with
Negative charge
－－－
－－－
－－－
＋＋＋
----------
The surface of the Earth
has Negative charge
under clear sky
＋＋＋ ＋＋＋
＋＋＋＋＋＋
＋＋＋
＋＋＋
＋＋＋ ＋＋＋
Principle of PDCE (2)
3 steps before Lightning
Stepped Leader
Streamer
Lightning
Discharge
circuit appear
We can NOT
control
Natural
Phenomenon
Stepped Leader
Time sequence
Lightning measure fight with the
big current after Lightning
happened
×
No streamer
No discharge
cirsuit
Time
No lightning happened
Principle of PDCE
Difference with Franklin Rod
Stepped Leader comes down all over
Streamer goes up to get
Stepped Leader
ＰＤＣＥ
No streamer goes up
Franklin rod
----------
＋＋＋ ＋＋＋
＋＋＋＋＋＋
＋＋＋
＋＋＋ ＋＋＋
Two reason why not receive Lightning
１） Two electrically separated part: Upper with Negative and Lower with Positive
２） Round surface make no Streamer
No meaning to get the lightning hit to the Building
Lightning current go through building structure give side effect against cabling in
the building
More than 90% of the Building use
structural frame as grounding conductor
Lightning current go through all
over the building while generating
Electro Magnetic Field
Reality of Lightning Rod
Purpose of the Lightning rod is to
protect the building but not to
protect electrical facilities in the
building such as cabling. It cause
serious side effect to all electrial
devices and cabling
No meaning to get the lightning hit to the Building
Cabling in Buildings
Power
Lilting
Information network
Telephone subscriber
Elevator
Water Pump
Secirity
uilding automation
No single cable directly connected to the Building frame structure
but many cable run in parallel with the frame get introduced big current by
Lightning current, cause damage to PC and other electrical devices
112m Tower at Batumi island owned by Indonesia Telecom
Result of the Field Test at Batumi in Indonesia
Before
Annual Lightning 180 days
Lightning hit to the tower 1-2 time a month
After
Annual Lightning 180 days
Lightning hit to the tower
ZERO
They placed Surge Counter near by Towers and made sure Others get
Lightning hit same as before
No Lightning hit happened since April 2009
Confirmed by 3rd party Test Lab.
Bureau VERITAS examined 200 places of PDCE
installation in France and Spain for 5 years data and
confirmed that no lightning hit near by PDCE
Lightning positioning data has 200m of tolerance
But with error analysis the effect is meaningful
Installation case 1 Tall Buddha stature 120m
120m height is the tallest bronze statue in the world
Elevator goes up to 85m height, which damaged by lightning
PDCE
Keep folks safe even in
Lightning shower.
ウィキィより転載
Installation case 2. The Earth Drilling Ship [Tickyu]
PDCE
In voyage to
Sriranka during July
2011 till Feb 2012,
they observed
many lightning hit
to the sea surface
but none to the
ship with 120m
height tower
Lot of Science devices in the ship are very sensitive with Lightning current
Competitor DAS by LEC
What is the difference?
DAS
PDCE
Cloud
--------
Cloud
--------
++++++
++++++
-------++++++
++++++
++++++
Chemi-rod with salt
++++++
Family of PDCE
新製品
Senior
Magnum
Marine
Junior
Baby
HT300/HT500
General
purpose
Winter
Ships
House
Outside pole
Chimny
300℃/500℃
For High Temp
Dia. 24cm
Wait. 8Kg
24cm
10Kg
24cm
13Kg
20cm
5Kg
12cm
2Kg
24cm
15kg
Prote 1:5
ction
1:5
1:5
60度
Spot
1:5
Comparison of PDCE with ordinary Franklin rod
ＰＤＣＥ
１）Most ideal status
No Lightning hit
Franklin Rod
2）Next ideal status
Receive Lightning
3) Worst condition
No control against Lightning hit
Worst condition of PDCE ＝ The best condition of ordinary Franklin rod
PDCE is NOT perfect always
Lightning suppression is NOT prefect.
No one can fool nature
Lightning hit PDCE in certain case.
But it keep minimum function as a Lightning conductor
++++++++
Unexpectedly high
Electrical field
----------+ + +
+++
Placese with high altitude
Winter
Summer
PDCE is NOT almighty against natural phenomionan
PDCE is a sort of Umbrella thus not effective always.
Surge comes over cable
Lightning hit ground beyond PDCE protected area
Strength 50kA lightning make 15kv at 160m distance
Common Grounding over several buildings
Lightning which did not hit a tower protected by PDCE (1)
Mobile phone tower with 42m height
Lightning which did not hit a tower protected by PDCE (2)
Mobile phone tower with 42m height
Lightning which did not hit a tower protected by PDCE (3)
Mobile phone tower with 42m height