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INSTRUCTION MANUAL
SGTEL-168
TELECOM LINE SURGE GENERATOR
1912 1 E l T o ro R d
●
Si l vera do, Ca lifo rni a 9 26 76
●
(9 49) 459 -96 00
●
co m-p o wer. com
REV070516
5.4.2.2 Example calculations for Current Waveform Parameters
Considered in the following example calculations is a typical
Type A, Longitudinal, 1500V surge waveform.
NOTE:
The final values determined for each waveform parameter are shown in blue
(with
the respective limit range in red)
The following values were measured:
MEASURED VALUES
I
pk
:
218.284 Amps
(Limit Range:
200-230A)
I
(10%/pk)
:
21.828 Amps
T
(10%/pk)
:
0.101
μ
s
I
(90%/pk)
:
196.46 Amps
T
(90%/pk)
:
6.789
μ
s
I
(50%/pk)
:
109.14 Amps
T
(50%/pk)
:
166.075
μ
s
Based on these measured values, the following parameters are
calculated:
RISE TIME (T
r
)
= T * 1.25
T
=
T
(90%/pk) -
T
(10%/pk)
T = 6.789
μ
s – 0.101
μ
s
T = 6.688
μ
s
T
r
= 6.688
μ
s * 1.25
T
r
= 8.36
μ
s
(Limit Range:
5-10
μ
s)
DECAY TIME (T
d
)
= T
(50%/pk)
- T
VirtOrigin
T
VirtOrigin
= -0.735
μ
s
T
d
=
T
(50%/pk)
- T
VirtOrigin
T
d
=
166.075
μ
s - -0.735
μ
s
T
d
= 166.81
μ
s
(Limit Range:
160-210
μ
s)
T
virtual-origin (
μs)
(
(
6.789 - 0.101
)
(
196.46 - 21.828
)
(
)
)
0.101
=
*
21.828
T
virtual-origin
(
(
X
2
-
X
1
)
(
Y
2
-
Y
1
)
(
)
)
X
1
=
*
Y
1
X
1
=
Time @ 10%/I
pk
point
Y
1
=
Current @ 10%/I
pk
point
X
2
=
Time @ 90%/I
pk
point
Y
2
=
Current @ 90%/I
pk
point
where:
