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