Furuno WR2120 Installation Manual page 61

Weather radar

Hide thumbs Also See for WR2120:

Operator's manual (93 pages)

Operator's manual (90 pages)

Installation manual (67 pages)

Table Of Contents

Table of Contents

The collection ��

structure:

where length L and width W of the structure are expressed in meter. Therefore the ��

will be leaded as follows:

III. Assessment of the average annual number of dangerous events ��

line.

Therefor ��

��

IV. Assessment of the average annual number of dangerous events ��

a line.

Therefor ��

��

Assessment of probability ��

The probabilities are given in the Annex B of IEC 62305-2. Based on practical condition, the

values are shown in the Table A.2.

Table A.2: Values of probability ��

Characteristics of structure

No protection device

Protected by

required components

Assessment of amount of loss ��

The values of amount of loss ��

designer (or the owner of the structure). The typical mean values of loss ��

given in the Annex C of IEC 62305-2 are merely values proposed by the IEC.

The loss ��

��

dangerous event caused by a lightning flash, considering both its extent and effects. The loss

value ��

varies the type of loss considered the weather radar will be classified to L2 and L4.

��

Table A.3: Type of loss L2 and L4: Loss values for each type of damage

Loss

��

= ��

��

where

is the typical mean relative value of all goods damaged by failure of internal systems (D3)

��

due to one dangerous event. It will be 10

and commercial.

is the typical mean relative value of all goods damaged by physical damage (D2) due to

��

one dangerous event. It will be 0.5 for structures of hospital, industrial, museum and

agricultural.

is the factor reducing the loss due to physical damage depending on the risk of fire. It will

��

be 0 for the weather radar.

Finally, we can get the values as follows:

extends to a line located at a distance of 500 m from the perimeter of the

��

= 2 × 500 × ( �� + �� ) + �� × 500

��

= 2 × 500 × ( 0.95 + 0.95 ) + �� × 500

��

= 16.8 × 787298.16 × 10

��

= ��

��

= 1, ��

= 0.01, ��

��

= ��

��

= 1, ��

= 0.01, ��

��

of damage:

��

depending on the protection measures to reduce physical damage

��

LPL

��

—

0.2

III

0.1

0.05

0.02

��

refers to the mean relative amount of a particular type of damage for one

��

= ��

× ��

��

= ��

× ��

× ( ��

+ ��

��

−6

× ��

× 10

��

= 2000 for CWRP condition, ��

��

× ��

× 10

��

= 200000 for CWRP condition, ��

��

0.05

1.04 x 10

0.05

1.04 x 10

0.02

4.15 x 10

0.01

2.07 x 10

should be evaluated and fixed by the lightning protection

Type of damage

⁄

× ��

��

+ ��

) × ��

��

−2

for structures of hospital, industrial, office, hotel

��

= ��

= 0

��

= ��

= 10

��

= 787298.16

= 13.227

due to flashes to a

��

−6

= 3.36 × 10

��

due to flashes near

��

−6

= 3.36 × 10

��

-5

0.05

-5

0.05

-6

0.02

-6

0.01

��

= ��

��

= ��

��

−2

and ��

��

−4

−2

��

0.05

0.02

0.01

in a structure

⁄

× ��

��

× ��

⁄

��

Table of Contents

Furuno WR2120 Installation Manual page 61

Related Manuals for Furuno WR2120

Related Products for Furuno WR2120

Table of Contents