TISP4070L3BJ, TISP4350L3BJ
BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS
AUGUST 1999 — REVISED NOVEMBER 1999
UL 1950 Third Edition
Telecommunication network connection
Clause 6.6 — Protection against overvoltage from power line crosses
IT Equipment
parameters
Figure 18b — Overvoltage flowchart
Annex NAC (normative) — Power line crosses
A
Connects
to outside
cable
No overvoltage
No
Test 1.
testing
600 V, 40 A,
1.5 s
Yes
Has min.
26 AW G
supplied
cord
Has
B
E
I
≤
100 A2s
No
Pass Test 1
No
@ 600 V
† )
No
Test 5
.
120 V, 25 A,
30 min or
Yes
Yes
open circuit
Yes
Has
1.3 A
d.c.
Pass 6.3.3
ground/line
separation
§ )
C
F
J
≤
No
No
Pass test 5
No
Fail
limiting ‡ )
Test 2. ¶ )
600 V, 7 A, 5 s
Test 3. # )
600 V, 2.2 A,
Yes
Yes
30 min or open circuit (3A)
Test 3A. # )
600 V, < 2.2 A, 30 min, no
open circuit
Has fire
enclosure
and
G
Yes
Yes
spacings
Test 4. # )
< Limiting voltage, < 2.2 A,
30 min, no open circuit, no
overvoltage protector
voltage limiting
No
No
D
H
Has
fire
enclosure
Pass test 2
pass tests
3, 4
No
Yes
Pass
Yes
NOTES
† ) Overcurrent protector I2t must must be lower than any other equipment element which carries the same current.
‡ ) UL accepts that a fuse with a 1 A or less rating meets the 1.3 A criterion.
§ ) Pass for 120 V a.c. between telecommunication line and ground current < 10 mA.
¶ ) Test 2 not required if the equipment d.c. breaking is 1.3 A or less, see comment ‡ ).
# ) Tests 3 and 4 not required for equipment with less than 1000 m of outside cable.
Pass criteria
Test 1
✔
Test 2
✔
Test 3
✔
Test 3A
Test 4
✔
Test 5
✔
✔
✔
No cheesecloth charring
Insulation OK
✔
✔
✔
✔
✔
✔
✔
wiring simulator (fuse) OK
I2t < 100 A2s @ 600 V a.c.
✔
Figure 3. UL 1950 POWER CROSS FLOW CHART
P R O D U C T
I N F O R M A T I O N
6
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