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ITU-T K.20 and K.21
2002 Teccor Electronics
SIDACtor
Data Book and Design Guide
4 - 11
http://www.teccor.com
+1 972-580-7777
R
R
* One-minute rest between repetitions
** This test is not conducted if primary protection is used.
Figure 4.3
Connection Appearances
Table 4.10
K.20 Lightning Test Conditions for Telecom Equipment in Central Office/Remote Terminal
Voltage (10x700 μs)
Current (5x310 μs)
Basic/Enhanced
(A)
Repetitions *
Primary Protection
Acceptance
Criteria
Single Port
Metallic and
Longitudinal
Basic/Enhanced
Multiple Ports
Longitudinal Only
Basic/Enhanced
1 kV/1.5 kV
25/37.5
±5
None **
A
4 kV/4 kV
100/100
±5
Installed if used
A
1.5 kV/1.5 kV
37.5/37.5
±5
None
A
4 kV/6 kV
100/150
±5
Installed if used
A
A
25
B
E
Equipment Under Test
Decoupling
Elements
Surge
Generator
A
25
R
3
= 25
B
E
Equipment Under Test
Decoupling
Elements
Surge
Generator
a) Transversal test
b) Longitudinal test