电信设备K.21 Amendment 1雷击测试
K.21 Amendment 1 (06/2020) -TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU
安装在客户场所的电信设备对过电压和过电流的抗扰度 修正案 1
范围
本标准涵盖的设备类型包括所有类型的电信设备，例如调制解调器、电话、路由器、数字用户线路的实现和个人电脑。
注 – 包含通过短电缆连接到地的低浪涌阻抗端口的相关设备，例如，使用通用串行总线 (USB) 电缆的打印机可能会因接地循环而受到损坏电流。保护方法参见和。
本标准适用于外部和内部端口。 ，涵盖基本测试方法和测试电路，是本建议书的组成部分。
– 外部端口的适用测试-Applicable tests for external ports
Test typeNo. of pairs simultaneously testedTest connectionsPrimary protectionPort type
Symmetric portCo- axial portDedicated power feed portMains power port
Lightning/ voltageSingleTransverse/ differentialNo2.1.1a3.1.14.1.1a5.1.1a
Port to earthNo2.1.1bn/a4.1.1b5.1.1b
Port to external portNo2.1.1cn/a4.1.1c5.1.1c
Coordination/ Transverse/ differentialYes2.1.2a3.1.24.1.2a5.1.2a
Coordination/ Port to earthYes2.1.2bn/a4.1.2b5.1.2b
Coordination/ Port to external portYes2.1.2cn/a4.1.2c5.1.2c
MultiplePort to earthNo2.1.3an/an/an/a
Port to external portNo2.1.3bn/an/an/a
Port to earthYes2.1.4an/an/an/a
Port to external portYes2.1.4bn/an/an/a
Ethernet unshielded twisted pair (UTPE)Port to earthNo2.1.8n/an/an/a
Transverse/ differentialNo2.1.7n/an/an/a
Voltage impulse testNo2.1.10n/an/an/a
Power over Ethernet (PoE)No2.1.11n/an/an/a
Ethernet shielded twisted pair(STPE)Shield to earthNo2.1.9
n/an/a
Port to earthNo2.1.8
n/an/a
Test typeNo. of pairs simultaneously testedTest connectionsPrimary protectionPort type
Symmetric portCo- axial portDedicated power feed portMains power port
Lightning currentSinglePort to earthNo2.1.5an/a4.1.5an/a
Port to external portNo2.1.5bn/a4.1.5bn/a
MultiplePort to earthNo2.1.6a, 2.1.10n/an/an/a
Port to external portNo2.1.6bn/an/an/a
Transverse/differentialn/an/a3.1.3n/an/a
Shield to earthn/an/a3.1.4n/an/a
Shield to external portn/an/a3.1.5n/an/a
Power induction and earth potential riseSingleTransverse/differentialNo2.2.1aUnder study4.2.1an/a
Port to earthNo2.2.1bn/a4.2.1b5.2.1under study
Port to external portNo2.2.1cn/a4.2.1c5.2.1under study
Coordination Transverse/differentialYes2.2.2aUnder study4.2.2an/a
Coordination port to earthYes2.2.2bn/a4.2.2bn/a
Coordination port to external portYes2.2.2cn/a4.2.2cn/a
Neutral potential riseSinglePort to earthNon/an/an/a5.2.2a
Port to external portNon/an/an/a5.2.2b
Mains power contactSingleTransverse/differentialNo2.3.1an/a4.3.1an/a
Port to earthNo2.3.1bn/a4.3.1bn/a
Port to external portNo2.3.1cn/a4.3.1cn/a
Ethernet portNo2.4
n/a not applicable.
-Lightning test conditions for ports connected to internal cables 连接到内部电缆的端口的雷电测试条件
No. of pairs simultaneously testedTest connectionPrimary protectionUnshielded cableShielded cablePoE feedDCpowered equipmentDCpower source
SingleShielded cable to earthNo
7.2
USB shielded cable to earthNo
7.3
Screen/ shield connection high current testNo
7.4
Ethernet transverse/ differentialNo7.77.7
Twisted pair port transverse/ differentialNo7.107.10
DC powered equipment portNo
7.8
DC power source portNo
7.9
MultipleUnshielded cable with symmetric pairsNo7.1
PoE Mode A and Mode B transverse/ differential testingNo
7.5
Ethernet longitudinal/commo n mode withstand testNo7.6
连接到外部对称对电缆的端口的雷电测试条件-Lightning test conditions for ports connected to external symmetric pair cables
Test No.
Test descriptionTest circuit and waveform(see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection (see clause 8 of)Acceptance criteria(see clause 9 of )
Comments
2.1.1aSingle pair, lightning, inherent, transverse/ differentialA.3-1 and A.6.1-1(a and b) 10/700Uc(max) = 1.5 kVR = 25 WUc(max) = 1.5 kVR = 25 WAlternating±5 surges(60 s between successive surges)NoneATest 2.1.1 does not apply when the equipment is designed to always be used with primary protection and the operator agrees. If this test is not performed, the appropriate test from Table 7 applies.If the inherent protection of the port under test contains surge protective devices (SPDs) that are connected to a protective earth (PE), a Uc(max) of 1.5 kV shall be used instead of 6 kV.If the equipment has an insulated case, the 6 kV test is applied with the equipment wrapped in conductive foil and the foil is connected to the generator return.When the equipment contains high current- carrying components that eliminate the need for primary protection, this test does not apply.(Lower voltage level testing also required for each test – see clause 7.3 of.)
2.1.1bSingle pair, lightning, inherent, port to earthA.3-1 and A.6.1-2 10/700Uc(max) = 1.5 kVR = 25 WUc(max) = 6 kV See comments R = 25 W
2.1.1cSingle pair, lightning, inherent, port to external portA.3-1 and A.6.1-3 10/700Uc(max) = 1.5 kVR = 25 WUc(max) = 6 kV See comments R = 25 W
连接到外部对称对电缆的端口的雷电测试条件-Lightning test conditions for ports connected to external symmetric pair cables
Test No.
Test descriptionTest circuit and waveform(see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection (see clause 8 of)Acceptance criteria(see clause 9 of )
Comments
2.1.2aSingle pair, lightning, coordination, transverse/ differentialA.3-1 and A.6.1-1(a and b) 10/700Uc(max) = 4 kVR = 25 WUc(max) = 6 kVR = 25 WAlternating±5 surges(60 s between successive surges)Special test protector (STP); see clause 8.4 of .When performing the external port to external port test, also add an STP/ primary protector to the untested port.AWhen the test is performed with Uc = Uc(max), the STP must operate. It may also operate with a voltage of Uc < Uc(max)When the equipment contains highcurrent-carrying components that eliminate the need for primary protection, refer to clause 10.1.1 of.(Lower voltage level testing also required for each test – see clause 7.3 of.)
2.1.2bSingle pair, lightning, coordination, port to earthA.3-1 and A.6.1-2 10/700Uc(max) = 4 kVR = 25 WUc(max) = 6 kVR = 25 W
2.1.2cSingle pair, lightning, coordination, port to external portA.3-1 and A.6.1-3 10/700Uc(max) = 4 kVR = 25 WUc(max) = 6 kVR = 25 W
2.1.3aMultiple pair, lightning, inherent, port to earthA.3-1 and A.6.1-4 10/700Uc(max) = 1.5 kVR = 25 WUc(max) = 1.5 kVR = 25 WAlternating±5 surges(60 s between successive surges)NoneAThe multiple pairs test is simultaneously applied to 100% of the pairs in the same street cable, but limited to a maximum of eight pairs. This test does not apply when the equipment is designed to be always used with primary protection. When the equipment contains high current-carrying components that eliminate the need for primary protection, this test does not apply.
2.1.3bMultiple pair, lightning, inherent, port to external portA.3-1 and A.6.1-5 10/700Uc(max) = 1.5 kVR = 25 WUc(max) = 1.5 kVR = 25 W
Test No.
Test descriptionTest circuit and waveform(see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection (see clause 8 of)Acceptance criteria(see clause 9 of )
Comments
2.1.4aMultiple pair, lightning, port to earthA.3-1 and A.6.1-4 10/700Uc(max) = 4 kVR = 25 WUc(max) = 6 kVR = 25 WAlternating±5 surges(60 s between successive surges)Agreed primary protector. When performing the external port to external port test, also add an STP/ primary protector to the untested port.AThe multiple pairs test is simultaneously applied to 100% of the pairs in the same street cable, but limited to a maximum of eight pairs.When the equipment contains highcurrent-carrying components that eliminate the need for primary protection, do not remove these components and do not add primary protection.(Lower voltage level testing also required for each test – see clause 7.3 of.)
2.1.4bMultiple pair, lightning, port to external portA.3-1 and A.6.1-5 10/700Uc(max) = 4 kVR = 25 WUc(max) = 6 kVR = 25 W
Test No.
Test descriptionTest circuit and waveform(see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection (see clause 8 of)Acceptance criteria(see clause 9 of )
Comments
2.1.5aSingle pair, lightning current, port to earthA.3-4 and A.6.1-2 8/20I = 1 kA/wireR = 0 WI = 5 kA/wireR = 0 WAlternating±5 surges(60 s between successive surges)NoneAThis test only applies when the equipment contains high current-carrying components that eliminate the need for primary protection. Do not remove these components.The multiple pairs test is simultaneously applied to 100% of the pairs in the same street cable, but limited to a maximum of eight pairs.
2.1.5bSingle pair, lightning current, port to external portA.3-4 and A.6.1-3 8/20I = 1 kA/wireR = 0 WI = 5 kA/wireR = 0 W
2.1.6aMultiple pair, lightning current, port to earthA.3-4 and A.6.1-4 8/20I = 1 kA/wire Limited to 6 kA totalR = 0 WI = 5 kA/wire Limited to 30 kA totalR = 0 WAlternating±5 surges(60 s between successive surges)NoneA
2.1.6bMultiple pair, lightning current, port to external portA.3-4 and A.6.1-5 8/20I = 1 kA/wire Limited to 6 kA total (Note 1)R = 0 WI = 5 kA/wire Limited to 30 kA total (Note 1)R = 0 W
2.1.7Ethernet transverse/ differentialA.3-5 and A.6.7-5 1.2/50-8/20combination wavegenerator (CWG)R1 = 10 Ω andR2 = 10 ΩUc(max) = 2 500 VUc(max) = 6 000 VAlternating±5 surges(60 s between successive surges)NoneA
Test No.
Test descriptionTest circuit and waveform(see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection (see clause 8 of)Acceptance criteria(see clause 9 of )
Comments
2.1.8Ethernet longitudinal/ common mode to transverse/ differential mode conversion testsA.3-5 and A.6.7-4 1.2/50-8/20 CWG R = 10 ΩUc(max) = 2 500 VUc(max) = 6 000 VAlternating±5 surges(60 s between successive surges)NoneA
2.1.9Screen/shield connection high current testA.3-5 and A.6.7-6 1.2/50-8/20 CWG R = 5 ΩUc(max) = 2 500 VUc(max) = 6 000 VAlternating±5 surges(60 s between successive surges)None (see Note 2)A
2.1.10UTPE port rated impulse voltage testA.3-5 and A.6.7-3a 1.2/50-8/20 CWG R = 5 ΩUc(max) = 2 500 V surgeUc(max) = 6 000 V surgeAlternating±5 surges(60 s between successive surges)None (Note 2)AThere shall be no insulation breakdown during the test and the post-test resistance shall be at least 2 MΩ when measured at 500 V d.c.;see Figure A.6.7-3. Monitor the impulse voltage to detect insulation breakdown or voltage protector operation.
2.1.11PoE Mode A and Mode B transverse/ differential testA.3-5 and A.6.7-2 1.2/50-8/20 CWGR1 = 10 Ω andR2 = 10 ΩUc(max) = 2 500 VUc(max) = 6 000 VAlternating±5 surges(60 s between successive surges)NoneA
NOTE 1 – Peak current is set by the weaker of the ports under test and the external port coupled to earth.NOTE 2 – When the cabling is fitted with SPDs, the equipment user and manufacturer may use different test conditions upon mutual agreement; this topic is currently under study.I: current; R: resistance; Uc(max): maximum charging voltage.
连接到外部对称对电缆的端口的电源感应和接地电位上升测试条件 - Power induction and earth potential rise test conditions for ports connected to external symmetric pair cables
Test No.
Test descriptionTest circuit (see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection(see clause 8 of )Acceptance criteria(see clause 9 of )
Comments
2.2.1aPower induction, inherent, transverse/differentialA.3-6 and A.6.1-1(a and b)Wsp(max) = 0.2 A2sf = 16⅔ Hz, 50 Hz or 60 HzUa.c.(max) = 600 VR = 600 Wt = 0.2 sWsp(max) = 0.2 A2sf = 16⅔ Hz, 50 Hz or 60 HzUa.c.(max) = 600 VR = 600 Wt = 0.2 s5NoneAThis test does not apply when the equipment is designed to be always used with primary protection and the operator agrees.When the equipment contains high current- carrying components that eliminate the need for primary protection, this test does not apply.
2.2.1bPower induction and earth potential rise, inherent,port to earthA.3-6 and A.6.1-2
2.2.1cPower induction and earth potential rise, inherent,port to external portA.3-6 and A.6.1-3
2.2.2aPower induction inherent/ coordination, transverse/ differentialA.3-6 and A.6.1-1(a and b)Wsp(max) = 1 A2sf = 16⅔ Hz, 50 Hz or 60 HzUa.c.(max) = 600 VR = 600 Wt = 1.0 s (Note 1)Wsp(max) = 10 A2sf = 16⅔ Hz, 50 Hz or 60 HzUa.c.(max) = 1 500 VR = 200 Wt(max)= 2 sWsp ´ R 2t =(U )2 (6-1)a.c.(Note 2)5Special test protector (STP); see clause 8.4 of .When performing the external port to external port test, also add an STP/primary protector to the untested port.AIf the equipment port has inherent primary protection, which eliminates the need for external primary protection, refer to clause 10.1.3 of.
2.2.2bPower induction and earth potential rise, inherent/ coordination,port to earthA.3-6 and A.6.1-2
2.2.2cPower induction and earth potential rise, inherent/ coordination,port to external earthA.3-6 and A.6.1-3
Test No.
Test descriptionTest circuit (see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection(see clause 8 of )Acceptance criteria(see clause 9 of )
Comments
2.3.1aMains power contact, inherent, transverse/ differentialA.3-6 and A.6.1-1(a and b)Ua.c. = 230 Vf = 50 Hzt = 15 min for each test resistor R = 10 W, 20 W,40 W, 80 W,160 W, 300 W,600 W and1 000 WSee acceptance criteria column.Ua.c. = 230 Vf = 50 Hzt = 15 min for each test resistorR = 10 W, 20 W, 40 W,80 W, 160 W, 300 W,600 W and 1 000 W See acceptance criteria column.1NoneFor basic level: criterion B.For enhanced level: criterion A for test resistors 160 W, 300 W,600 W, and1 000 W;criterion B for the other resistor values.In some situations, the test may be performed with a reduced number of current limit resistors. Refer toitem 11, clause 7.2 of andclause I.1.4 of forguidance on selecting the necessary size of resistors.When the equipment is designed to be always used with primary protection, and the operator agrees, perform this test with the STP installed. (Note 3)If the equipment port has inherent primary protection, which eliminates the need for external primary protection, refer to clause 10.1.4 of.
2.3.1bMains power contact, inherent, port to earthA.3-6 and A.6.1-2
2.3.1cMains power contact, inherent,port to external portA.3-6 and A.6.1-3
2.4Ethernet port DC insulation resistanceA.6.7-3UDC = ±500 V DCUDC = ±500 V DC2NoneInsulation resistance> 2 MWTest in both polarities, Ensures no port to earth conduction up to 350 V AC
Test No.
Test descriptionTest circuit (see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection(see clause 8 of )Acceptance criteria(see clause 9 of )
Comments
NOTE 1 – The test conditions for Test 2.2.2 (basic test level) may be adapted to the local conditions, by variation of the test parameters within the following limits, so thatI2t = 1 A2s is fulfilled:Ua.c.(max) = 300 V... 600 V, selected to meet local conditions;t £ 1.0 s, selected to meet local conditions;R £ 600 Ω, is to be calculated according to Equation 6-2:R = Ua.c.(max)√t (6-2)NOTE 2 – For Test 2.2.2 (enhanced test level), the equipment shall comply with the specified criterion for all voltage–duration combinations bounded (on and below) by the 10 A2s voltage–duration curve in Figure 1. The curve in Figure 1 is defined by Equation 6-1 and the boundary conditions in this table.NOTE 3 – The a.c. mains voltage and frequency for Test 2.3.1 may be changed to the local mains supply voltage and frequency values. For a.c. test voltage values other than 230 V, the test resistor values should be adjusted to provide the same prospective short-circuit current values that occur in the 230 V test condition.t: duration; Ua.c.: alternating current voltage; Ua.c.(max): maximum alternating current voltage; Wsp(max) maximum specific energy; f: frequency
连接到外部同轴电缆的端口的雷电测试条件-Lightning test conditions for ports connected to external coaxial cables
Test No.
Test descriptionTest circuit and waveform(see figures in Annex A of )
Basic test levels (also see clause 7 of )Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection(see clause 8 of )Acceptance criteria(see clause 9 of )
Comments
3.1.1Lightning, inherent, transverse/ differentialA.3-5 and A.6.2-1 1.2/50 – 8/20 CWGUc(max) = 1.0 kVR = 0 WUc(max) = 1.5 kVR = 0 WAlternating±5 surges(60 sbetween successive surges)NoneAThis test does not apply when the equipment is designed to be always used with primary protection.When the equipment contains high current- carrying components that eliminate the need for primary protection, this test does not apply.
(Lower voltage level testing also required – seeclause 7.3 of .)
3.1.2Lightning, coordination, transverse/ differentialA.3.5 and A.6.2-11.2/50 – 8/20CWGUc(max) = 4 kVR = 0 WUc(max) = 6 kVR = 0 WAlternating±5 surges(60 sbetween successive surges)Special test protector (STP); see clause 8.4of .When performing the external port to external port test, also add an STP/primary protector to the untested port.AWhen the test is performed with Uc = Uc(max), the STP must operate. It may also operate with a voltage of Uc < Uc(max)When the equipment contains high current- carrying components that eliminate the need for primary protection, refer to clause 10.2 of .(Lower voltage level testing also required – seeclause 7.3 of .)
3.1.3Lightning,A.3.4 andI = 1 kAI = 5 kAAlternatingNoneAThis test only applies when
current,A.6.2-1
±5 surges
the equipment contains high
transverse/8/20
(60 s
current-carrying components
differential
between
that eliminate the need for
successive
primary protection. Do not
surges)
remove these components.
Test No.
Test descriptionTest circuit and waveform(see figures in Annex A of )
Basic test levels (also see clause 7 of )Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection(see clause 8 of )Acceptance criteria(see clause 9 of )
Comments
3.1.4Lightning shield test, port to earthA.3.4 and A.6.2-28/20I = 4 kA (Note 1)I = 2 kA (Note 2)I = 20 kA (Note 1)I = 5 kA (Note 2)Alternating±5 surges(60 sbetween successive surges)STP;see clause 8.4 of .When performing the external port to external port test, also add an STP/primary protector to the untested port.AOnly applies to earthed equipment and equipment without isolation capacitors in the coaxial cable path.
3.1.5Lightning shield test, port to external portA.3.4 and A.6.2-38/20I = 4 kA (Note 1)I = 2 kA (Note 2)I = 20 kA (Note 1)I = 5 kA (Note 2)Alternating±5 surges(60 sbetween successive surges)STP;see clause 8.4 of .When performing the external port to external port test, also add an STP/primary protector to the untested port.AOnly applies to earthed equipment and equipment without isolation capacitors in the coaxial cable path.
NOTE 1 – Equipment designed to be connected to antennas or equipment exposed to direct lightning currents, e.g., connected to antennas or equipment mounted on a tower. NOTE 2 – Applicable equipment not covered by Note 1.
连接到外部直流或交流专用馈电电缆的端口的雷电测试条件-Lightning test conditions for ports connected to external d.c. or a.c. dedicated power feeding cables
Test No.
Test descriptionTest circuit and waveform (see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels(also see clauses 5 and 7 of )
Number of testsPrimary protection(see clause 9 of )Acceptance criteria(see clause 9 of )
Comments
4.1.1aSingle pair, lightning, inherent, transverse/ differentialA.3-1 and A.6.3-1(a and b) 10/700Uc(max) = 1.5 kVR = 25 WUc(max) = 1.5 kVR = 25 WAlternating ±5surges (60 s between successive surges)NoneATest 4.1.1 does not apply when the equipment is designed to be always used with primary protection and the operator agrees. If this test is not performed, the appropriate test from Table 7 applies.If the inherent protection of the port under test contains SPDs that are connected to earth, a Uc(max) of1.5 kV shall be used instead of 6 kV.If the equipment has an insulated case, the 6 kV test is applied with the equipment wrapped in conductive foil and the foil is connected to the generator return.When the equipment contains high current-carrying components that eliminate the need for primary protection, this test does not apply.(Lower voltage level testing also required for each test – see clause 7.3 of .)
4.1.1bSingle pair, lightning, inherent, port to earthA.3-1 and A.6.3-2 10/700Uc(max) = 1.5 kVR = 25 WUc(max) = 6 kVR = 25 W
4.1.1cSingle pair, lightning, inherent, port to external portA.3-1 and A.6.3-3 10/700Uc(max) = 1.5 kVR = 25 WUc(max) = 6 kVR = 25 W
Test No.
Test descriptionTest circuit and waveform (see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels(also see clauses 5 and 7 of )
Number of testsPrimary protection(see clause 9 of )Acceptance criteria(see clause 9 of )
Comments
4.1.2aSingle pair, lightning, coordination, transverse/ differentialA.3-1 and A.6.3-1(a and b) 10/700Uc(max) = 4 kVR = 25 WUc(max) = 6 kVR = 25 WAlternating ±5surges (60 s between successive surges)Special test protector (STP); see clause 8.4 of .When performing the external port to external port test, also add an STP/primary protector to the untested port.A (Note)When the test is performed with Uc = Uc(max), the STP must operate. It may also operate with a voltage ofUc < Uc(max)When the equipment contains high current-carrying components that eliminate the need for primary protection, do not remove these components and do not add primary protection. During the test, this protection must operate atUc = Uc(max).If the primary protector is a clamping type device, use the test circuit and test levels specified in Test 4.1.5.(Lower voltage level testing also required – see clause 7.3 of .)
4.1.2bSingle pair, lightning, coordination, port to earthA.3-1 and A.6.3-2 10/700Uc(max) = 4 kVR = 25 WUc(max) = 6 kVR = 25 W
4.1.2cSingle pair, lightning, coordination, port to external portA.3-1 and A.6.3-3 10/700Uc(max) = 4 kVR = 25 WUc(max) = 6 kVR = 25 W
4.1.3Multiple pair, lightning, inherent, port to earth and port to external port
n/an/a
4.1.4Multiple pair, lightning, port to earth and port to external port
n/an/a
Test No. Test descriptionTest circuit and waveform (see figures in Annex A of )Basic test levels (also see clause 7 of)Enhanced test levels(also see clauses 5 and 7 of ) Number of testsPrimary protection(see clause 9 of )Acceptance criteria(see clause 9 of ) Comments
4.1.5aSingle pair, lightning current, port to earthA.3-4 and A.6.3-2 8/20I = 1 kA/wireR = 0 WI = 5 kA/wireR = 0 WAlternating ±5surges (60 s between successive surges)NoneAThis test only applies when the equipment contains highcurrent-carrying components that eliminate the need for primary protection. Do not remove these components.
4.1.5bSingle pair, lightning current, port to external portA.3-4 and A.6.3-3 8/20I = 1 kA/wireR = 0 WI = 5 kA/wireR = 0 W
4.1.6Multiple pair, lightning current n/an/a
NOTE – As there is little knowledge of the agreed primary protector, it is not possible to give guidance. In the interim, test conditions for symmetric pair ports have been provided.
连接到外部直流或交流专用馈电电缆的端口的功率感应和接地电位升高测试条件- Power induction and earth potential rise test conditions for ports connected to external d.c. or a.c. dedicated power feeding cables
Test No.
Test descriptionTest circuit (see figuresin Annex A of )Basic test levels (also see clause 7 of )Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection(see clause 8 of )Acceptance criteria(see clause 9 of )
Comments
4.2.1aPower induction, inherent, transverse/ differentialA.3-6 and A.6.3-1(a and b)Wsp(max) = 0.2 A2sf = 16⅔ Hz, 50 Hz or 60 HzUa.c.(max) = 600 VR = 600 Wt = 0.2 sWsp(max)= 0.2 A2sf = 16⅔ Hz, 50 Hz or 60 Hz Ua.c.(max)= 600 VR = 600 Wt = 0.2 s5NoneAThis test does not apply when the equipment is designed to be always used with primary protection and the operator agrees.When the equipment contains high current-carrying components that eliminate the need for primary protection, this test does not apply.
4.2.1bPower induction and earth potential rise, inherent, port to earthA.3-6 and A.6.3-2
4.2.1cPower induction and earth potential rise, inherent, port to external portA.3-6 and A.6.3-3
4.2.2aPower induction, inherent/ coordination, transverse/ differentialA.3-6 and A.6.3-1(a and b)Wsp(max) = 1 A2sf = 16⅔ Hz, 50 Hz or 60 HzUa.c.(max) = 600 VR = 600 Wt = 1.0 s (Note 1)Wsp(max)= 10 A2sf = 16⅔ Hz, 50 Hz or 60 HzUa.c.(max) = 1 500 VR = 200 Wt(max)= 2 sWsp ´ R 2t =(U )2 (6-1)a.c.(Note 2)5Special test protector (STP); see clause 8.4 of .When performing the external port to external port test, also add an STP/primary protector to the untested port.AWhen the equipment contains high current-carrying components that eliminate the need for primary protection, do not remove these components and do not add primary protection.
4.2.2bPower induction and earth potential rise, inherent/ coordination, port to earthA.3-6 and A.6.3-2
4.2.2cPower induction and earth potential rise, inherent/coordination,A.3-6 and A.6.3-3
Test No.
Test descriptionTest circuit (see figuresin Annex A of )Basic test levels (also see clause 7 of )Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection(see clause 8 of )Acceptance criteria(see clause 9 of )
Comments
port to external port
4.3.1aMains power contact, inherent, transverse/ differentialA.3-6 and A.6.3-1(a and b)Ua.c. = 230 Vf = 50 Hzt = 15 min for each test resistor R = 10 W, 20 W,40 W, 80 W,160 W, 300 W,600 W and1 000 WSee acceptance criteria column.(Note 3)Ua.c. = 230 Vf = 50 Hzt = 15 min for each test resistorR = 10 W, 20 W, 40 W,80 W, 160 W, 300 W,600 W and 1 000W See acceptance criteria column.(Note 3)1NoneFor basic level: criterion B.For enhanced level: criterion A for test resistors 160 W, 300 W,600 W and1 000 W;criterion B for the other resistor values.In some situations, the test may be performed with a reduced number of current limit resistors. Refer toitem 11, clauses 7.2 and I.1.4 of for guidance on selecting the necessary size of resistors. When the equipment is designed to be always used with primary protection, and the operator agrees, perform this test with the STP installed.
4.3.1bMains power contact, inherent, port to earthA.3-6 and A.6.3-2
4.3.1cMains power contact, inherent, port to external portA.3-6 and A.6.3-3
NOTE 1 – The test conditions for Test 4.2.2 (basic test level) may be adapted to the local conditions, by variation of the test parameters within the following limits, so thatI2t = 1 A2s is fulfilled:Ua.c.(max) = 300 V... 600 V, selected to meet local conditions;t £ 1.0 s, selected to meet local conditions;R £ 600 W, is to be calculated according to Equation 6-2:R = Ua.c.(max)√t (6-2)NOTE 2 – For Test 4.2.2 (enhanced test level), the equipment shall comply with the specified criterion for all voltage–duration combinations bounded (on and below) by the 10 A2s voltage–duration curve in Figure 1. The curve in Figure 1 is defined by Equation 6-1 and the boundary conditions in this table.NOTE 3 – The a.c. mains voltage and frequency for Test 4.3.1 may be changed to the local mains supply voltage and frequency values. For a.c. test voltage values other than 230 V, the test resistor values should be adjusted to provide the same prospective short-circuit current values that occur in the 230 V test condition.
电源端口的测试条件-Test conditions for mains power ports
Test No.
Test descriptionTest circuit and waveform(see figures inAnnex A of )Basic test levels (also see clause 7 of)(Note 1)Enhanced test levels (also see clauses 5 and 7 of)(Note 1)
Number of testsPrimary protection (see clause 8 of K.44])Acceptance criteria (see clause 9 of T K.44])
Comments
5.1.1aLightning, inherent, transverse/ differentialA.3-5 and A.6.4-1 1.2/50-8/20 CWGUc(max) = 2.5 kVR = 0 WUc(max) = 6.0 kVR = 0 WAlternating±5 surges(60 s)between successive surges)NoneAThis test does not apply when the equipment is designed to be always used with primary protection and the operator agrees.(Lower voltage level testing also required – see clause 7.3 of .)
5.1.1bLightning, inherent, port to earthA.3-5 and A.6.4-2 1.2/50-8/20 CWGUc(max) = 2.5 kVR = 0 WUc(max) = 6.0 kVR = 0 W
5.1.1cLightning, inherent, port to external portA.3-5 and A.6.4-3 1.2/50-8/20CWGUc(max) = 2.5 kVR = 0 WUc(max) = 6.0 kVR = 0 W
5.1.2aLightning, inherent/ coordination, transverse/ differentialA.3-5 and A.6.4-1 1.2/50-8/20 CWGUc(max) = 6.0 kVR = 0 WUc(max) = 10.0 kVR = 0 WAlternating±5 surges(60 sbetween successive surges)Agreed primary protector (mains)(Note 2). When performing theexternal port toexternal port test, also add an STP/primary protector to the untested port.A(Lower voltage level testing also required – see clause 7.3 of .)
5.1.2bLightning, inherent/ coordination, port to earthA.3-5 and A.6.4-2 1.2/50-8/20 CWGUc(max) = 6.0 kVR = 0 WUc(max) = 10.0 kVR = 0 W
5.1.2cLightning, inherent/ coordination, port to external portA.3-5 and A.6.4-3 1.2/50-8/20 CWGUc(max) = 6.0 kVR = 0 WUc(max) = 10.0 kVR = 0 W
Test No.
Test descriptionTest circuit and waveform(see figures inAnnex A of )Basic test levels (also see clause 7 of)(Note 1)Enhanced test levels (also see clauses 5 and 7 of)(Note 1)
Number of testsPrimary protection (see clause 8 of K.44])Acceptance criteria (see clause 9 of T K.44])
Comments
5.2.1Earth potential riseA.3-5 and A.6.4-1 1.2/50-8/20 CWGUnder studyUnder study5NoneA
5.2.2aNeutral potential rise, inherent, port to earthA.3-5 and A.6.4-2a.c.U(AC) = 600 Vf = 50 Hz or 60 Hzt = 1 sR = 200 WU(AC) = 1 500 Vf = 50 Hz or 60 Hzt = 1 sR = 200 W5NoneAThis test applies only when the equipment is to be installed with a TT or IT mains system and the operator requests it.
5.2.2bNeutral potential rise, inherent, port to external portA.3-5 for and A.6.4-3a.c.
NOTE 1 – The tests in this table apply to both mains-powered equipment and the combination of portable power supplies and equipment for portable supply-powered equipment. NOTE 2 – The total lead length used to connect the agreed primary protector shall be 1 m.
表6-外壳静电放电试验条件-Table 6 – Test conditions for electrostatic discharge applied to the enclosure
Test No.
Test description
Test circuit
Basic test level(Note)
Enhanced test level(Note)
Number of tests
Primary protectionAcceptance criteria (see clause 9 of )
6.1aAir dischargeLevel 3 (8 kV)Level 4 (15 kV)5n/aA
6.1bContact dischargeLevel 3 (6 kV)Level 4 (8 kV)5n/aA
NOTE – The test applies to the equipment enclosure.
表7-连接到内部电缆的端口的雷电测试条件（正在研究短电缆的测试豁免）Table 7 – Lightning test conditions for ports connected to internal cables (Test exemptions for short cables are under study)
Test No.
Test description(Note 1)Test circuit and waveform(see figures in Annex A of)
Basic test levels (also see clause 7 of )
Enhanced test levels (also see clauses 5 and 7 of)
Number of tests
Primary protection(see clause 8 of )
Acceptance criteria(see clause 9 of )
Comments
7.1Unshielded cable with symmetric pairsA.3-5 and A.6.5-1 1.2/50-8/20 CWG R = 10 W(The value of R is independent of the number of conductors)Uc(max) = 1 kVUc(max) = 1.5 kVAlternating ±5surges (60 s between successive surges)NoneAThe test is applied simultaneously to all symmetric cable pairs connected to the equipment port under test except for unshielded Ethernet ports.
(Lower voltage level testing also required – see clause 7.3 of .)
7.2Shielded cable to earthA.3-5 and A.6.5-2 1.2/50-8/20 CWG R = 0 WThe value of R is independent of the number of conductorsUc(max) = 1 kVUc(max) = 1.5 kVAlternating ±5surges (60 s between successive surges)NoneA(Lower voltage level testing also required – see clause 7.3 of .)
7.3USB shielded cable to earthA.3-5 and A.6.5-2 1.2/50-8/20 CWG R = 0 WUc(max) = 100 VUc(max) = 150 VAlternating ±5surges (60 s between successive surges)NoneATest is performed with the supplied cable (not the 20 m cable specified inFigure A.6.5-2).
(Lower voltage level testing also required – see clause 7.3 of .)
表7-连接到内部电缆的端口的雷电测试条件（豁免见第6条注释5）Table 7 – Lightning test conditions for ports connected to internal cables (See clause 6, NOTE 5, for exemptions)
Test No.
Test descriptionTest circuit and waveform(see figures in Annex A of )Basic test levels (also see clause 7 of)Intermediate test levels (also see clause 7 of)Enhanced test levels (also see clause 7 of
Number of testsPrimary protection (clause 8 of )Acceptance criteria (clause 9 of )
Comments
7.4Screen/ shield connection high current testA.3-5 and A.6.7-6 1.2/50-8/20 CWG R = 5 ΩUc(max) = 2.5 kVUc(max) = 4.0 kVUc(max) = 6.0 kVAlternating ±5surges (60 s between successive surges)NoneA
7.5PoE Mode A and Mode B transverse/ differential testA.3-5 and A.6.7-2 1.2/50-8/20 CWGR1 = 10 Ω andR2 = 10 ΩUc(max) = 2.5 kVUc(max) = 4.0 kVUc(max) = 6.0 kVAlternating ±5surges (60 s between successive surges)NoneA
7.6Ethernet longitudinal/common mode withstand testA.3-5 and A.6.7-3a 1.2/50-8/20 CWG R = 5 ΩUc(max) = 2.5 kVUc(max) = 4.0 kVUc(max) = 6.0 kVAlternating±5 surges(60 s between successive surges)None (Note 2)AThere shall be no insulation breakdown during the test and the post-test resistance shall be at least 2 MΩ when measured at 500 V d.c.(see Figure A.6.7-3). Monitor the impulse voltage to detect insulation breakdown or voltage protector operation.
7.7Ethernet transverse/ differentialA.3-5 and A.6.7-5 1.2/50-8/20 CWGUc(max) = 2.5 kVUc(max)) = 4.0 kVUc(max) = 6.0 kVAlternating±5 surges(60 s between successive surges)NoneA
表7-连接到内部电缆的端口的雷电测试条件（正在研究短电缆的测试豁免）-Table 7 – Lightning test conditions for ports connected to internal cables (Test exemptions for short cables are under study)
Test No.Test description(Note 1)Test circuit and waveform(see figures in Annex A of )Basic test levels (also see clause 7 of )Enhanced test levels (also see clauses 5 and 7 of)
Number of testsPrimary protection (see clause 8 of )Acceptance criteria(see clause 9 of )
Comments
7.8DC powered equipment portA.3-5 (1.2/50-8/20 CWG) and A.6.6-1aCoupling element: 10 W + 9 µF in seriesUc(max) = 1 kVUc(max) = 1.5kVAlternating ±5 surges(60 s between successive surges)NoneASee clauses 7.1.1 and10.5.3
7.9DC power source portA.3-5 (1.2/50-8/20 CWG) and A.6.6-1bCoupling element: 10 W + 9 µF in seriesUc(max) = 1 kVUc(max) = 1.5kVAlternating ±5 surges(60 s between successive surges)NoneASee clauses 7.1.1 and10.5.4
7.10Twisted pair port transverse/ differentialA.3-5 and A.6.7-5 1.2/50-8/20 CWGUc(max) = 1 kVUc(max) = 1.5kVAlternating ±5 surges(60 s between successive surges)NoneA
NOTE 1 – For equipment without an earth connection, wrap the equipment in foil and connect the foil to the generator return.NOTE 2 – When the cabling is fitted with SPDs, the equipment user and manufacturer may use different test conditions upon mutual agreement; this topic is currently under study.
Annex A Special resistibility requirements
附录A特殊电阻（电阻率）要求
在某些情况下，由于环境条件、国家法规、经济和技术考虑、安装标准或服务要求的可靠性，即使增强的电阻要求也不足以满足客户场所的要求。然后，网络运营商可以要求特殊的电阻要求。
当以下所有条件同时存在时，特殊电阻要求适用：
[*]IT或TT电力系统；
[*]未按照安装接地和连接；
[*]当风险评估需要时，未按照安装初级保护；
[*]安装多服务电涌保护器（MSPD）有困难。
在这种情况下，网络运营商可能需要请求特殊的电阻要求，含测试说明和特殊电阻要求。建议按照指示修改第7条“测试条件”中描述的测试要求。
提供了在无法实现粘合时用于确保安全性和耐受性的特殊要求。
这些特殊要求是对增强型ITU-T K.21测试的补充，适用于带接地电涌保护器和不带接地电涌保护器的设备。
为了确保客户的安全，在没有适当接地和连接的情况下，设备应包含表A.2-1中给出的端口到端口隔离。为确保接地电涌保护器的安全，需要适当的接地和连接。
表A.2-1a–连接到外部对称对绞电缆的端口的特殊雷电测试条件
Test No.
Test descriptionTest circuit and waveform(see Annex A figures)Special test levels (also see clauses 5 and 7)
Number of tests
Primary protection
Acceptance criteria
Comments
2.1.2aSingle port, lightning, coordination, transverse/ differentialA.3-1 and A.6.1-1(a and b) 10/700Uc(max) = 4 kV R = 25 WR1 = 100 W5 of each polaritySpecial test protector;see clause 8.4.AWhen the test is performed with Uc= Uc(max), the special test protector must operate. It may also operate with a voltage of Uc < Uc(max).When the equipment contains high current- carrying components which eliminate the need for primary protection, refer to clause 10.1.1.Ethernet port tests are under study. The STP earthing resistance R1 increased to 100 W simulates the condition that this test intends.
2.1.2bSingle port, lightning, coordination, port to earthA.3-1 and A.6.1-2 10/700Uc(max) = 13 kV R = 25 WR1 = 100 W
2.1.2cSingle port, lightning, coordination, port to external portA.3-1 and A.6.1-3 10/700Uc(max) = 13 kV R = 25 WR1 = 100 W
表A.2-1b-电源端口的特殊雷电测试条件
Test No.
Test descriptionTest circuit and waveform(see Annex A figures)Special test levels (also see clauses 5 and 7)
Number of tests
Primary protection
Acceptance criteria
Comments
5.1.1aLightning, inherent, transverse/ differentialA.3-5 and A.6.4-1combination wave generatorUc(max) = 10 kV R = 0 W5 of each polarityNone Whenperforming theexternal port to symmetric pair port test, also add an STP/primary protector to the untested port. R1= 100 W for the untested port.A
5.1.1bLightning, inherent, port to earthA.3-5 and A.6.4-2combination wave generatorUc(max) = 10 kV R = 0 W
5.1.1cLightning, inherent, port to external portA.3-5 and A.6.4-3combination wave generatorUc(max) = 10 kV R = 0 W
表A.2-1c-连接到内部电缆的端口的特殊雷电测试条件
Test No.Test descriptionTest circuit and waveform (see figures in Annex A)Special test levels (also see clauses 5 and 7)Number of testsPrimary protectio nAcceptance criteria
Comments
Internal POTS line transverse/differential
5 of each polarityNoneAOnly applies to POTS ports.
7.1
Unshielded cableFigures A.3-5 and A.6.1-1 (a and b)Combination wave generator R = 2 WUc(max) = 4 kV (10 A2s) OR
Figures A.3-1 and A.6.1-1 (a and b) 10/700R = 25 W, 300 V GDTgenerator coupling, no STP
Uc(max) = 8 kV (10 A2s)
Test No.Test descriptionTest circuit and waveform (see figures in Annex A)Special test levels (also see clauses 5 and 7)Number of testsPrimary protectio nAcceptance criteria
Comments
Internal POTS line to earth Figures A.3-5 and A.6.5-1. Combination wave generatorR = 10 WFigures A.3-1 and 6.5-1 10/700R = 25 W
Uc(max) = 10 k V
ANDUc(max) = 13 k V
7.2Shielded cable port (includes coaxial cable ports)Figures A.3-5 (Combination wave generator)and A.6.5-2 R = 0 W
Uc(max) = 10 kVAlternating ±5surges (60 s between successive surges)
None
A
(Lower voltage level testing also required – see clause 7.3)
NOTE – For equipment without an earth connection, wrap the equipment in foil and connect the foil to the generator return.
小的开关电源适配器，做K.21应该做多少伏雷击呢？
Table 5 – Test conditions for mains power ports
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