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參數(shù)資料
| 型號(hào)： | TSI220B1RL |
| 英文描述： | TERMINAL SET INTERFACE PROTECTION AND DIODE BRIDGE |
| 中文描述： | Set接口端子保護(hù)和二極管橋 |
| 文件頁(yè)數(shù)： | 3/9頁(yè) |
| 文件大?。?/td> | 160K |
| 代理商： | TSI220B1RL |
TSIxxB1
3/9
The V
RM
value corresponds to the maximum
voltage of the application in normal operation. For
instance, if the maximum line voltage is ranging
between
100V
RMS
of ringing plus 48V of battery
voltage, then the protection chosen for this applica-
tion shall have a V
RM
close to 200V.
The V
BO
is the triggering voltage. This indicates
the
voltage
limit
for
short-circuits. Passing this V
BO
makes the device
turn on.
which
the
component
The I
BO
is the current that makes the device turn
on. Indeed, if we want a Trisil to be turned on not
only the voltage across it shall pass the V
BO
value
but the current through it shall also pass the I
BO
value.
In other words, if a voltage surge occurring on the
line is higher than the V
BO
value of a Trisil,
whereas the line surge current is limited to a value
that does not exceed the Trisil’s I
BO
value, then the
Trisil will never turn into short circuit. At this time
the surge will be clamped by the Trisil.
Anyhow the electronic circuitry located after the
Trisil will always be protected whatever the Trisil
state is (crowbar or clamping mode).
The I
H
Trisil is turned on, as soon as the crossing current
surge gets lower than this I
H
value, the Trisil
protection device turns back in its idle state.
Remark : for this reason the Trisil ‘s I
H
value shall
be chosen higher than what the maximum telecom
line current can be.
stands for the holding current. When the
TSIxxB1
SURGE STANDARD :
BEHAVIOUR
WITH
REGARD
TO
The TSIxxB1 is able to replace both diode bridge
and
usual
discrete
protection
terminals. Furthermore it complies with the CCITT
K17 recommendations :
10/700
μ
s waveform surge test,
1.5kV
AC power induction test
AC power contact test
on
telecom
ELECTRICAL PARAMETERS
Fig. 2 :
Test circuit for the CCITT K17 recommendations
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