
ITU-T K.20 and K.21
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4 - 12
2002 Teccor Electronics
SIDACtor
Data Book and Design Guide
Figure 4.4
Connection Appearances (R = 10
for the various power cross tests)
, 20
, 40
, 80
, 160
, 300
, 600
, and 1000
* One-minute rest between repetitions
* One-minute rest between repetitions
** Reduce to 1.5 kV if SPD connects to GRD.
*** Does not apply if primary protectors are used.
A
R
R
B
E
Equipment
Under Test
Timing Circuit
Generator
U
a.c.
Table 4.11
K.20 Power Cross Test Conditions for Telecom Type Ports, Metallic, and Longitudinal
Voltage
Basic/Enhanced
Current (5x310 μs)
Basic/Enhanced
(A)
Duration
Basic/Enhanced
Repetitions *
Primary
Protection
Acceptance Criteria
Basic/Enhanced
600 V/600 V
50 Hz or 60 Hz
1/1
0.2 s
5
None
A/A
600/1.5 kV
50 Hz or 60 Hz
1/7.5
1 s/2 s
5
None
A/A
230/230 V
50 Hz or 60 Hz
23/23
15 min
1
None
B/B
11.5/11.5
B/B
5.75/5.75
B/B
2.875/2.875
B/B
1.44/1.44
B/A
0.77/0.77
B/A
0.38/0.38
B/A
0.23/0.23
B/B
Table 4.12
K.21 Lightning Test Conditions for Telecom Equipment on Customer Premises
Voltage (10x700 μs)
Current (5x310 μs)
Basic/Enhanced
(A)
Repetitions *
Primary
Protection
Acceptance
Criteria
Single Port
Multiple Ports
Longitudinal Only
(kV)
Basic/Enhanced
Longitudinal
(kV)
Basic/Enhanced
Metallic
(kV)
Basic/Enhanced
1.5/6 **
37.5/150
±5
None
A ***
4/6
100/150
±5
Installed if used
A
1.5/1.5
1.5/1.5
37.5/37.5
±5
None
A ***
4/6
4/6
100/150
±5
Installed if used
A