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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 Surge
Waveform
Requirements
The surge waveform requirements are defined in terms of both open circuit
voltage and short circuit current waveform requirements. For both voltage and
current waveforms, the following parameters are defined:
OPEN CIRCUIT
VOLTAGE WAVE FORM
SHORT CIRCUIT
CURRENT WAVEFORM
Peak Voltage (V
pk
) Peak
Current
(I
pk
)
*
Rise Time (T
r
)
*
Rise Time (T
r
)
Decay Time (T
d
)
Decay Time (T
d
)
*NOTE:
In the ANSI/TIA-968-B standard, the terms Front Time (T
f
) and Rise Time (T
r
)
are used interchangeably.
Given in Table I (below) are the limit ranges for the individual waveform
parameters for each surge type.
TABLE I
– Surge Waveform Requirements
Waveform
Parameter
Type A
800V
Type A
1500V
Type B
1000V
Type B
1500V
Pwr line
2500V
Peak Voltage
(V
pk
)
±800-880V ±1500-1650V ±1000-1100V ±1500-1650V
±2500-2750V
Rise Time
(T
r
)
6-10
μ
s
6-10
μ
s
6.3-11.7
μ
s
6.3-11.7
μ
s
1-2
μ
s
Open Circuit
Decay Time
(T
d
)
560-860
μ
s
160-260
μ
s
576-864
μ
s
576-864
μ
s
10-19
μ
s
Peak Current
(I
pk
)
100-115A
200-230A
25-27.5A
37.5-41.3A
1000-1250A
Rise Time
(T
r
)
5-10
μ
s
5-10
μ
s
3.5-6.5
μ
s
3.5-6.5
μ
s
1-2
μ
s
Short Circuit
Decay Time
(T
d
)
560-760
μ
s
160-210
μ
s
256-384
μ
s
256-384
μ
s
10-19
μ
s
These waveform requirements are discussed in more detail in the following
respective sections. Measurement guidelines, as well as guidelines and examples
of the associated calculations are also provided.
