ERICO ISODC User Manual
Instruction Manual
Isolated Downconductor System
Model ISODC & Accessories
For Isolated Lightning Protection using
IEC 62305 Separation Distances
WARNING:
Due to ongoing research into the phenomena of lightning, lightning protection technology and product improvement, ERICO®reserves the right to
alter any information and specifications contained herein at any time without notice.
2
www.erico.com
The ERITECH®Isolated Downconductor is a specialized lightning protection downconductor, that during operation may be subjected to impulse
currents of over 100,000 Amps and voltage of up to 700,000 V may be developed.
Reliable operation is dependent upon correct design and installation in accordance with IEC 62305 series and ERICO instructions.
The Isolated Downconductor must not be damaged in handling, installation or service. The downconductor sheath is a specialized semi-conductive
material requiring electrical bonding to the structure. This sheath is fragile and damage to the sheath may require replacement of the cable.
Fully refer to installation instructions prior to handling and installation. Do not assume that traditional lightning protection or HV cable
practices apply.
These products should be installed as part of a IEC 62305 series integrated lightning protection system.
No lightning protection system offers 100% protection against all lightning events. However, correct installation is essential for the maximum level
of safety.
Only install system during storm-free periods. Do not install in close proximity to overhead power lines. Do not expose personnel to
electromagnetic radiation sources such as live transmission equipment during installation.
1. ERICO products shall be installed and used only as indicated in ERICO product instruction sheets and training materials. Instruction sheets are
available at www.erico.com and from your ERICO customer service representative.
2. ERICO products must never be used for a purpose other than the purpose for which they were designed or in a manner that exceeds specified
load ratings.
3. All instructions must be completely
followed to ensure proper and safe installation and performance.
4. Improper installation, misuse, misapplication or other failure to completely follow ERICO’s instructions and warnings may cause product
malfunction, property damage, serious bodily injury and death.
SAFETY INSTRUCTIONS: All governing codes and regulations and those required by the job site must be observed. Always use appropriate safety
equipment such as eye protection, hard hat, and gloves as appropriate to the application.
3
www.erico.com
TABLE OF CONTENTS
1. DESIGN ........................................................................................................................ 4
2. GENERAL ASSEMBLY PROCEDURE .................................................................................. 8
3. ASSEMBLY OF ISOLATED MAST ..................................................................................... 9
4. FIXING ISOLATED MAST TO THE STRUCTURE .................................................................11
5. SECURING THE ISOLATED DOWNCONDUCTOR ............................................................ 13
6. FITTING LOWER TERMINATION ADAPTER ..................................................................... 14
7. CONNECTION OF LOWER TERMINATION ADAPTER ...................................................... 15
8. ISODC PRIMARY EQUIPOTENTIAL BOND ....................................................................... 15
9. LIGHTNING EVENT COUNTER ...................................................................................... 16
10. TESTING AND MAINTENANCE ..................................................................................... 16
11. UPPER TERMINATION PROCEDURE ...............................................................................16
12. GENERAL SPECIFICATIONS............................................................................................17
ANNEX A: ISODUAL DUAL COUPLING ............................................................................... 18
ANNEX B: ERITECH
®
SYSTEM 3000 MAST AND SUPPORT HARDWARE .............................. 19
4
www.erico.com
Design requirements of the ERITECH®Isolated Downconductor system is based on two sections of the IEC 62305-3 standard
“Protection Against Lightning – Part 3: Physical damage to structures and life hazard”. For correct installation the system must be
designed and installed in accordance with these requirements.
Step 1. Determine the required height of the air terminal to provide protection according to IEC 62305 Protection Angle
Method (PAM)
Step 2. Determine the length of Isolated Downconductor so separation distance (IEC 62305-3 section 6.3) does not
exceed 1000 mm
Step 3. Meet ERICO’s mounting and installation requirements and interconnect to a standard compliant grounding or lightning
protection system
IEC 62035 Protection Angle Method
An air terminal is assigned a protective angle where any equipment fully located within the protected volume is deemed to be
protected. The protection angle provides a cone volume of protection with the angle determined by the height of the air
terminal above the object and the Lightning Protection Level (LPL).
Determine the required minimum height of the air terminal tip above the top of mast/items to be protected. It is recommended
that highest LPL be used (i.e. LPL I). Alternatively the required Lightning Protection Level can be determined by IEC 62305-2
risk assessment.
80
70
60
50
40
30
20
10
0
0 102030 4050602
I
II
III
IV
Class of
LPS
(LPL)
Height (m)
Protection Angle ␣⬚
Figure 1. IEC 62305 Part 3, Table 2 details the protection angle.
1. DESIGN
5
www.erico.com
Table 1. Height versus horizontal distance using protection angle method.
Height h of air-
termination (m)
Distance d (m) and protection angle ␣⬚ (rounded down to nearest degree)
LPL I LPL II LPL III LPL IV
Distance
Angle
Distance
Angle
Distance
Angle
Distance
Angle
1 2.75 70 3.27 73 4.01 76 4.70 78
2 5.49 70 6.54 73 8.02 76 9.41 78
3 7.07 67 8.71 71 10.46 74 12.99 77
4 7.52 62 9.42 67 12.31 72 13.95 74
5 8.32 59 10.25 64 14.52 71 16.35 73
6 8.57 55 10.82 61 14.14 67 17.43 71
7 9.29 53 11.65 59 15.72 66 18.24 69
8 9.53 50 12.32 57 16.40 64 18.85 67
9 9.65 47 12.85 55 16.93 62 20.21 66
10 10.00 45 13.27 53 17.32 60 20.50 64
11 9.90 42 14.08 52 19.05 60 19.84 61
12 10.07 40 14.30 50 19.20 58 20.78 60
13 10.16 38 14.44 48 19.27 56 21.64 59
14 9.80 35 14.50 46 19.27 54 22.40 58
15 9.74 33 15.00 45 19.91 53 23.10 57
16 9.61 31 14.92 43 20.48 52 22.85 55
17 9.04 28 15.31 42 20.99 51 23.40 54
18 8.78 26 15.65 41 21.45 50 23.89 53
19 8.86 25 15.94 40 21.86 49 25.21 53
20 7.68 21 15.07 37 21.45 47 25.60 52
21 14.70 35 21.75 46 25.93 51
22 14.84 34 22.00 45 26.22 50
23 14.94 33 22.21 44 27.41 50
24 14.42 31 22.38 43 26.65 48
25 14.43 30 22.51 42 26.81 47
26 13.82 28 21.82 40 27.88 47
27 13.17 26 22.66 40 27.96 46
28 13.06 25 21.88 38 28.00 45
29 12.91 24 21.85 37 28.00 44
30 12.73 23 21.80 36 28.97 44
31 21.71 35 28.91 43
32 21.58 34 28.81 42
33 21.43 33 28.69 41
34 21.25 32 28.53 40
35 21.03 31 28.34 39
36 20.78 30 29.15 39
37 20.51 29 28.91 38
38 20.20 28 28.64 37
39 19.87 27 29.39 37
40 19.51 26 29.06 36
1. DESIGN (continued)
6
www.erico.com
Table 1. Height versus horizontal distance using protection angle method. (continued)
Height h of air-
termination (m)
Distance d (m) and protection angle ␣⬚ (rounded down to nearest degree)
LPL I LPL II LPL III LPL IV
Distance
Angle
Distance
Angle
Distance
Angle
Distance
Angle
41 19.12 25 29.79 36
42 18.70 24 30.51 36
43 18.25 23 30.11 35
44 18.68 23 28.57 33
45 18.18 22 29.22 33
46 28.74 32
47 28.24 31
48 27.71 30
49 28.29 30
50 28.87 30
51 28.27 29
52 28.82 29
53 29.38 29
54 28.71 28
55 28.02 27
56 27.31 26
57 26.58 25
58 25.82 24
59 25.04 23
60 25.47 23
h
1
d
1
d
2
h
2
␣
1
Protected
Not Protected
Table 2. Lightning Protection Levels
Lightning Protection Level
(Class of LPS)
Peak current (10/350 µs) Probability of exceedance
I 200 kA ≤ 1 %
II 150 kA ≤ 3 %
III 100 kA ≤ 9 %
IV 100 kA ≤ 16 %
1. DESIGN (continued)
␣
2
Loading...