TISP61089B High Voltage Ringing SLIC Protector
‘1089 Section 4.5.6 - Test Connections
The telecommunications port R and T terminals may be tested simultaneously or individually. Figure 14 shows connection for simultaneous
(longitudinal) testing. Figure 15 shows the two connections necessary to individually test the R and T terminals during transverse testing.
The values of protector current are calculated by dividing the open-circuit generator voltage by the total circuit resistance. The total circuit
resistance is the sum of the generator fictive source resistance and the TISP61089B series resistor value. The starting point of this analysis is
to calculate the minimum circuit resistance for a test by dividing the generator open-circuit voltage by the TISP61089B rating. Subtracting the
generator fictive resistance from the minimum circuit resistance gives the lowest value of series resistance that can be used. This is repeated
for all test connections. As the series resistance must be a fixed value, the value used has to be the highest value calculated from all the
considered test connections. Where both 10/1000 and 2/10 waveshape testing occurs, the 10/1000 test connection gives the highest value of
minimum series resistance. Unless otherwise stated, the analysis assumes a -40
°C
to +85
°C
temperature range.
‘1089 Section 4.5.7 - First-Level Lightning Surge Testing
Table 1 shows the tests for this section. The peak TISP61089B current, I
TM
, is calculated by dividing the generator open voltage by the sum of
the generator fictive source and the line feed, R
S
, resistance values. Columns 9 and 10 show the resultant currents for R
S
values of 25
Ω
and
40
Ω.
The TISP61089B rated current values at the various waveshapes are higher than those listed in Table 1. Used with the specified values
of R
S
, the TISP61089B will survive these tests.
Table 1. First-Level Surge Currents
Surge
#
1
2
3
4
5
Open-circuit
Voltage
V
600
1000
1000
2500
1000
Short-circuit
Current
A
100
100
100
500
25
No
of
Tests
+25, -25
+25, -25
+25, -25
+10, -10
+5, -5
Test
Connections
Transverse &
Longitudinal
Transverse &
Longitudinal
Transverse &
Longitudinal
Longitudinal
Longitudinal
Primary
Fitted
No
No
No
No
No
Generator
Fictive
Source
Resistance
Ω
6
10
10
5
40
TISP61089B I
TM
A
R
s
= 25
Ω
19 &
2x19
29 &
2x29
29 &
2x29
2x83
2x15
R
s
= 40
Ω
13 &
2x13
20 &
2x20
20 &
2x20
2x56
2x13
Waveshape
10/1000
10/360
10/1000
2/10
10/360
NOTES: 1. Surge 3 may be used instead of Surge 1 and Surge 2.
2. Surge 5 is applied to multiple line pairs up to a maximum of 12.
3. If the equipment contains a voltage-limiting secondary protector, each test is repeated at a voltage just below the threshold of
limiting.
‘1089 Section 4.5.8 - Second-Level Lightning Surge Testing
Table 2 shows the 2/10 test used for this section. Columns 9 and 10 show the resultant currents for R
S
values of 25
Ω
and 40
Ω.
Used with an
R
S
of 40
Ω,
the TISP61089B with survive this test. The 25
Ω
value of R
S
is only intended to give first-level (Section 4.5.7) survival. Under
second-level conditions, the peak current will be 2x143 A, which may result in failure of the 2x120 A rated TISP61089B. However, if the testing
is done at or near 25
°C,
the TISP61089B will survive with an R
S
value of 25
Ω
as the 2/10 rating is 170 A at this temperature.
Table 2. Second-Level Surge Current
Open-circuit
Voltage
V
5000
Short-circuit
Current
A
500
No
of
Tests
+1, -1
Generator
Fictive
Source
Resistance
Ω
10
TISP61089B I
TM
A
R
s
= 25
Ω
2x143
R
s
= 40
Ω
2x100
Surge
#
Waveshape
Test
Connections
Primary
Fitted
1
NOTE:
2/10
Longitudinal
No
1. If the equipment contains a voltage-limiting secondary protector, the test is repeated at a voltage just below the threshold of
limiting.
OCTOBER 2000 - REVISED JULY 2008
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
