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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
5.4.1.2 Example calculations for Voltage 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
V
pk
:
1525.2 Volts
(Limit Range:
1500-1575V)
V
(30%/pk)
:
457.56 Volts
T
(30%/pk)
:
0.328
μ
s
V
(90%/pk)
:
1372.7 Volts
T
(90%/pk)
:
4.515
μ
s
V
(50%/pk)
:
762.60 Volts
T
(50%/pk)
:
222.5
μ
s
Based on these measured values, the following parameters are
calculated:
RISE TIME (T
r
)
= T * 1.67
T
=
T
(90%/pk) -
T
(30%/pk)
T = 4.515
μ
s – 0.328
μ
s
T = 4.187
μ
s
T
r
= 4.187
μ
s * 1.67
T
r
= 6.992
μ
s
(Limit Range:
6-10
μ
s)
DECAY TIME (T
d
)
= T
(50%/pk)
- T
VirtOrigin
T
VirtOrigin
= -1.766
μ
s
T
d
=
T
(50%/pk)
- T
VirtOrigin
T
d
=
222.5
μ
s - -1.766
μ
s
T
d
= 224.266
μ
s
(Limit Range:
160-260
μ
s)
T
virtual-origin
(
(
X
2
-
X
1
)
(
Y
2
-
Y
1
)
(
)
)
X
1
=
*
Y
1
X
1
=
Time @ 30%/V
pk
point
Y
1
=
Voltage @ 30%/V
pk
point
X
2
=
Time @ 90%/V
pk
point
Y
2
=
Voltage @ 90%/V
pk
point
where:
T
virtual-origin (
μs)
(
(
4.515 - 0.328
)
(
1372.7 - 457.56
)
(
)
)
0.328
=
*
457.56
