Mainland China Standard—YD/T 1082-2000

SIDACtor ® Protection Thyristors
Mainland China Standard—YD/T 1082-2000
Mainland China Standard—YD/T 1082-2000
YD/T 1082-2000 establishes the technical specifications on
overvoltage and overcurrent protection of access network
equipment for Mainland China.
Figure 3.12 ESD Waveform
I
This Chinese Standard parallels the ITU-T K series. This
Standard specifies the technical requirements and test
methods for overvoltage and overcurrent protection and
the basic environmental adaptability of access network
equipment. This Standard does not deal with protection
against radiated electromagnetic fields.
Ip
0.9 Ip
I1
The specifications as presented here are a succinct
summary of the lightning surge, power fault, and ESD
testing required by this document.
I2
The ports of the Network equipment are classified into
five categories:
0.1 Ip
t
Ip
30 μs
60 μs
I. Ports used to connect the twisted pairs introduced from
outside of the building, namely analog user interface,
ISDN-BRA interface, ADSL interface, and so on
II. Twisted pair ports used to interconnect the different
equipment inside the building, namely V.24 interface, V.35
interface, 2048 kbits/s interface connected to twisted
pairs, 10/100 Base-T Ethernet interface, and so on
III. Coaxial cable port: 2048 kbits/s interface connected
to coaxial cables, ISDN-PRA interface, and so on
IV. AC Power interface
V. DC power interface
The sequence of testing shall follow this order:
EFT (Electrically Fast Transient)
Waveform of the generator should meet the requirements
of ITU-T K.34.
Table 3.46 EFT
ESD --> EFT --> simulation of lightning strike --> power line
induction --> power line contact
ESD Testing
Number of Ports
Tested
Port
Remote
Central Office
I
1
—
1 kV, 5 kHz, > 1 min
Test Conditions
II
1
1
1 kV, 5 kHz, > 1 min
III
1
1
1 kV, 5 kHz, > 1 min
IV
1
—
2 kV, 2.5 kHz, > 1 min
V
—
1
2 kV, 2.5 kHz, > 1 min
VI
—
1
2 kV, 2.5 kHz, > 1 min
The environmental conditions for ESD testing shall be:
Table 3.47 Lightning Surge Test Conditions
t 5FNQFSBUVSF‰¡$_¡$
t 3FMBUJWFIVNJEJUZ‰_
Number of Ports
t "JSQSFTTVSF‰_L1B
Class of
Port
The waveform of the generator should meet the
requirements of YD/T 950 as shown in table 3.45.
Establish a communications link via any port of the EUT
before the test. The communications link should be
capable of normal use without being attended to manually
after the test.
Table 3.45 Waveform Parameters
Indicated
Voltage
6 kV
Peak of
Initiation
of the
Discharge
Currents
Ip
Time of Rising
During
Discharge
Switch On / Off
tr
22.5 A ±
30%
0.7–1 ns
© 2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Central
Office
I
—
Voltage
and Current
Waveforms
μs
Amplitude *
3
10/700 – 5/310
4 kV
8
1.2/50 – 8/20
6 kV
Remote
II
1
1
1.2/50 – 8/20
500 V
III
1
1
1.2/50 – 8/20
500 V
IV
—
1
1.2/50 – 8/20
10 kV, 5 kA
V
1
1
1.2/50 – 8/20
500 V
* All tests are conducted ±5 times with at least one minute between events.
Current
at 20 ms
I1
12 A ±
30%
Current at
60 ns
I2
Table 3.48 Power Line Induction and Contact Testing
6 A ± 30%
Number of Ports
Tested
Port
Remote
Central Office
I
3
—
600 V, 600Ω, 50 Hz, 1 s
I
1
—
220 V, 50 Hz, 1 h,
600/200/10Ω
227
Revised: April 15, 2011
Test Conditions