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[Replaced by GB/T 18802.11-2020] Low-voltage surge protective devices -- Part 1: Surge protective devices connected to low-voltage power distribution systems -- Requirements and tests
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Surge protective devices connected to low-voltage power distribution systems -- Part 1: Performance requirements and testing methods
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PDF similar to GB 18802.1-2011
Basic data | Standard ID | GB 18802.1-2011 (GB18802.1-2011) | | Description (Translated English) | [Replaced by GB/T 18802.11-2020] Low-voltage surge protective devices -- Part 1: Surge protective devices connected to low-voltage power distribution systems -- Requirements and tests | | Sector / Industry | National Standard | | Classification of Chinese Standard | K30 | | Classification of International Standard | 29.240.10 | | Word Count Estimation | 63,683 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-12-01 | | Older Standard (superseded by this standard) | GB 18802.1-2002 | | Quoted Standard | GB 2099.1-2008; GB/T 4207-2003; GB 4208-2008; GB/T 5013.1; GB/T 5013.2; GB/T 5013.3; GB/T 5013.4; GB/T 5013.5; GB/T 5013.6; GB/T 5013.7; GB/T 5013.8; GB/T 5023.1; GB/T 5023.2; GB/T 5023.3; GB/T 5023.4; GB/T 5023.5; GB/T 5023.6; GB/T 5023.7; GB/T 5169.10-2006; GB 14048.1-2006; GB 14048.5-2008; GB 16895.22-2004; GB/T 16927.1-1997; GB/T 16935.1-2008; GB/T 17627.1-1998; GB/T 18802.12-2006; GB/T 21714.1-2008; IEC 60999-1; IEC 60999-2 | | Adopted Standard | IEC 61643-1-2005, MOD | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 22 of 2011 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard applies to the indirect effects of lightning and direct lightning or other transient over -voltage surge protection appliances. These appliances are assembled connected to AC rated voltage not exceeding 1000V (RMS), 50/60Hz or DC voltage not exceeding 1500V circuits and equipment. This standard specifies the characteristics of these appliances, the standard test methods and ratings, these appliances contain at least one used to limit the voltage and discharge surge current non-linear elements. | GB 18802.1-2011: [Replaced by GB/T 18802.11-2020] Low-voltage surge protective devices -- Part 1: Surge protective devices connected to low-voltage power distribution systems -- Requirements and tests
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Low-voltage surge protective devices.Part 1. Surge protective devices connected to low-voltage power distribution systems.Requirements and tests
ICS 29.240.10
K30
National Standards of People's Republic of China
Replacing GB 18802.1-2002
Low-voltage surge protective devices (SPD)
Surge protectors low voltage distribution systems. Part 1
Performance requirements and test methods
Part 1. Surgeprotectivedevicesconnectedtolow-voltagepowerdistributionsystems-
(IEC 61643-1.2005, MOD)
Issued on. 2012-12-01 2011-12-30 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
Introduction Ⅴ
1 General 1
2 Conditions 2
3 Terms and definitions 2
4 Category 7
4.1 Ports 7
4.2 SPD Design Type 7
Ⅰ, Ⅱ and Ⅲ class 4.3 SPD Test 7
4.4 Location 7
Easy accessibility 8 4.5
4.6 Installation 8
4.7 SPD disengagement 8
4.8 overcurrent protection 8
4.9 GB 4208 by the enclosure class IP code 8
4.10 Temperature Range 8
4.11 System 8
Over 4.12 pole SPD 8
5 Standard ratings 9
Class 5.1 Ⅰ impact test current Iimp preferred value 9
5.2 Ⅱ type test nominal discharge current In a preferred value 9
Open circuit voltage of 5.3 Ⅲ class test Uoc preferred value 9
5.4 Voltage protection level Up preferred value 9
Preferably 5.5 ac rms or dc maximum continuous operating voltage Uc 9
6 Technical requirements 9
6.1 General requirements
6.2 electrical performance requirements 10
6.3 mechanical requirements 12
6.4 Environmental Requirements 14
6.5 Safety Requirements 14
6.6 pairs of additional testing and two-port input/output port of a separate SPD requirements 15
7 type tests 15
Test Procedure 7.1 General 16
7.2 logos and marks 20
7.3 Terminals and connection 20
7.4 direct contact protection test 24
7.5 determine the voltage limit 24
7.6 operating duty test 27
7.7 SPD and SPD disconnector safety overload 31
7.8 and two-port input/output terminals of the SPD a separate experiment 38 ports
7.9 Additional tests 40
8 routine testing and acceptance testing 52
8.1 Routine tests 52
8.2 Acceptance Test 52
Appendix A (informative) consideration of the application of the SPD 53 Ⅰ level test
Appendix B (Normative Appendix) TOV value 54
Annex C (normative) Summary Symbol 55
References 56
Foreword
All technical content in this section is mandatory.
GB/T 18802 "Low Voltage Surge Protector (SPD)" series of standards structure and names are as follows.
--- GB 18802.1 low-voltage distribution system surge protector (SPD) the first part of the performance requirements and test methods
--- GB/T 18802.12 Low Voltage Distribution System Surge Protection Device (SPD) Section 12 selection and use guidelines
--- GB/T 18802.21 voltage surge protective devices - Part 21. telecommunications and signaling networks surge protector (SPD) Performance
Requirements and test methods
--- GB/T 18802.22 voltage surge protective devices Part 22. Surge protection telecommunications and signaling networks (SPD) Select
And practical guidance
--- GB/T 18802.311 voltage surge protective devices - Part 311 gas discharge tube (GDT) specification
--- GB/T 18802.321 voltage surge protective devices - Part 321 avalanche breakdown diode (ABD) specification
--- GB/T 18802.331 voltage surge protective devices - Part 331 metal oxide varistor (MOV) specification
--- GB/T 18802.341 voltage surge protective devices - Part 341 thyristor surge suppression (TSS) Specification
--- This section GB/T Part of 118,802.
The partial modification using IEC 61643-1.2005 "low-voltage surge protective devices - Part 1. Connect the low-voltage distribution system surge protector
Performance requirements and test methods "(in English).
This section drafted in accordance with GB/T 1.1-2009 given rules.
This part of IEC 61643-1.2005 following differences.
--- The partial lifting of the 3.4 voltage switching type SPD and voltage limiting type SPD 3.5 in another call.
--- The part number shown editorial adjustments have been made, the number shown in order of appearance in ascending order.
--- This part of the increase in note 7.7 General requirements "is used as the pointing device or similar functionality SPD during the test can be disconnected."
--- The partial lifting of the IEC 61643-1.2005 table in 11x, only the provisions of the current overload characteristic selection coefficient K value.
--- This part of the short-circuit withstand capability test test voltage Uc to Ucs, because the test voltage required to consider recommendations of the manufacturer
Maximum overcurrent protection device rated voltage. Modified according to EN61643-11.2002 A11.2007 and IEC 61643-
11 (CD).
--- Symbols appear in this section summarize.
The main difference between this part and GB 18802.1-2002 of.
--- This section in Chapter 3, the definition of the impulse current Iimp, the maximum continuous operating voltage Uc, 1.2/50 and 8/20 impulse voltage overshoot
Hit current and other definitions had been revised and improved. It added a new definition. multipole SPD, the total discharge current and power system Itotal
Large continuous operating voltage Ucs. Cancel the temporary overvoltage (TOV) defined fail-safe performance. Test with a temporary over-voltage value UT
Instead of the temporary overvoltage (TOV) feature.
--- This section adds multi-pole SPD type, and this type of SPD parameter requirements, performance requirements and test methods for the corresponding feed
Line provision.
--- Identification requirements in this section, uncheck the nominal rated frequency identification, product identification method adds a test categories for
In nominal discharge current marking requirements have been adjusted.
--- For the TOV characteristics of this section, clear the TOV and low pressure system failures caused by the fault of the high (medium) voltage system caused
Test methods of TOV. While increasing the test circuit diagram TOV under SPD failure caused by high (medium) voltage system and
The SPD terminal voltage corresponding to the expected timing chart, TOV eligibility criterion is divided into fault mode and tolerance mode, qualified judge
Require a corresponding change.
--- Type of pilot projects in this section for the product to be carried out more clearly. Each test items are clearly marked "to be tested" or "discomfort
"Or" not mandatory test "to replace the original" on demand. "
--- This part of the time to get class Ⅰ impulse current test test parameters were adjusted at the same time relax the charge amount Q of tolerance.
--- In this section to determine the voltage protection level tests for SPD, testing procedures Ⅰ and type Ⅱ trial order was
Adjustment.
--- This part of the test method for measuring the voltage limit, for the SPD, contains only a simplified test voltage limiting element, just In
Or Uoc under test.
--- This section only connection between the neutral and protective earth and freewheeling greater than 500A of the SPD, when the operating duty test, the provisions of
The commercial power supply prospective short circuit current of at least 100A.
--- Withstand capability of this part of the test increases the low short circuit current test and Ifi lower than declarations withstand capability of the SPD
Additional testing.
Eligibility criterion --- heat stability test this part of the assessment from the surface temperature to surface temperature.
This Part replaces GB 18802.1-2002 "Low Voltage Distribution System Surge Protection Device (SPD) - Part 1. Performance requirements and tests
method".
This part is proposed by the China Electrical Equipment Industrial Association.
This part of the National Standardization Technical Committee arrester (SAC/TC81) centralized.
This section is responsible for drafting unit. Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd., Xi'an High Voltage Apparatus Research Institute Co., Ltd.
Participated in the drafting of this section. Lightning Protection Center of Shanghai, Zhejiang Raytek Electric Co., Ltd. Hangzhou Yi Long Electrical Technology Co., Ltd., Nanjing
Phoenix Electric Co., Ltd., Changzhou, a Czech mine Electronics Co., Ltd., Sichuan light Lightning Protection Technology Co., Ltd., Schneider Electric (in
Country) Investment Co., Ltd., Beijing ABB Low Voltage Electric Co., Ltd., Germany and Sheng Electric (Shanghai) Co., Ltd., Tianjin force mine technology
Limited, Weidmuller Trading (Shanghai) Co., Ltd. Hangzhou, the switch, the Goodale Hercynian Electronics Co.,
Dongfeng Electric Co., Ltd. Nanjing Qinhuai.
The main drafters of this section. Yintian Wen, Wang Biyun, Wang Xinxia, Zhou Gang plot.
The drafters of some of the participants. Zhao Yang, Zheng thunder, as easy to show, Xu Qin Zhu, Jing beam, Wang Yan, Liu Zhenliang, Liu Liping, Tong Jing, Sun Weiwei,
Tao Jun, Wuling Juan, Wang Hui, Hou Ao roots.
This part of the standard replaces the previous editions are.
--- GB 18802.1-2002.
Introduction
This section explains the surge protector (SPD) in the performance test.
There are three categories of tests.
Class Ⅰ test is used to simulate the impact of lightning current partial import. Class Ⅰ test methods to comply SPD generally recommended for high exposure sites,
For example. the lightning protection system protects the cable entrance to the building.
Class Ⅱ or Ⅲ class Test Method Test SPD to withstand the impact of short duration. The SPD is usually recommended for less exposed
location.
All SPD should be regarded as a test "black box" as possible. Factory assessment techniques used may be included in the test, so that the
Test method used was the most appropriate.
Section 12 describes the actual situation of the SPD in the selection and guidance.
Low-voltage surge protective devices (SPD)
Surge protectors low voltage distribution systems. Part 1
Performance requirements and test methods
1 General
1.1 Scope
This section applies to the indirect effects of lightning and direct lightning or other transient over-voltage surge protection of electrical appliances. These appliances are
After assembly is connected to AC rated voltage not exceeding 1000V (RMS), 50/60Hz or DC circuit voltage does not exceed 1500V and
equipment.
This section provides the electrical characteristics, test methods and rating criteria, these appliances contain at least one vent for limiting the voltage and discharge
Non-linear elements surge current.
1.2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB 2099.1-2008 plug socket for household and similar purposes - Part 1. General requirements (mod IEC 60884-1.2006)
GB/T 4207-2003 solid insulating materials under moist conditions index tracking of the measuring method and the proof tracking index compared
(IdtIEC 60112. 1979)
GB 4208-2008 housing protection (IP Code) (idtIEC 60529.2001)
GB/T 5013 (all) rated voltage 450/750V and below rubber insulated cables (idtIEC 60245)
GB/T 5023 (all) rated voltage 450/750V and below PVC insulated cables (idtIEC 60227)
GB/T 5169.10-2006 Fire hazard testing for electric and electronic products - Part 10. Glowing/hot wire based test methods for burning
Hot wire apparatus and common test procedure (idtIEC 60695-2-10.2000)
GB 14048.1-2006 Low-voltage switchgear and control equipment Part 1. General (mod IEC 60947-1.2001)
GB 14048.5-2008 Low-voltage switchgear and control equipment Part 5-1. Control circuit devices and switching elements - Electromechanical control
Electric circuit (mod IEC 60947-5-1.2003)
Part 5-53 GB 16895.22-2004 Electrical installations of buildings. electrical equipment selection and installation --- isolation, switching and control
System equipment Section 534. overvoltage protection of electrical (idtIEC 60364-5-53.2001)
GB/T 16927.1-1997 high voltage test techniques - Part 1. General test requirements (eqvIEC 60060-1. 1989)
GB/T 16935.1-2008 within low-voltage systems Insulation coordination for equipment - Part 1. Principles, requirements and tests (idtIEC 60664-1.
1992)
GB/T 17627.1-1998 high voltage test techniques for low voltage equipment - Part 1. Definition and test requirements (eqvIEC 61180-
1.1992)
GB/T 18802.12-2006 Low Voltage Distribution System Surge Protection Device (SPD) - Part 12. Guidelines for selection and use
(IdtIEC 61643-12.2002)
GB/T 21714.1-2008 lightning protection - Part 1. General (IEC 62305-1.2005, IDT)
IEC 60999 (all) for connecting devices --- Safety requirements for electrical copper conductors --- screw-type and screwless-type clamping units
2 Conditions of Use
2.1 normal conditions of use
2.1.1 Frequency. AC power frequency between 48Hz and 62Hz.
2.1.2 Voltage. voltage is continuously applied between the SPD terminals should not exceed its maximum continuous operating voltage.
2.1.3 Altitude. Altitude should not exceed 2000m.
2.1.4 Use and storage temperature.
--- Normal range of -5 ℃ ~ 40 ℃;
--- Limit the range of -40 ℃ ~ 70 ℃.
2.1.5 Humidity - Relative humidity. 30% and should be between 90% at room temperature.
2.2 abnormal conditions of use
SPD is placed under abnormal conditions of use, design and use may need special consideration, and the manufacturer should be brought to attention.
To put sunlight or other outdoor SPD rays may require additional technical requirements.
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Surge Protector (SPD) surgeprotectivedevice
For limiting transient over-voltage and surge current electrical discharge, which contains at least one non-linear element.
3.2
SPD one-portSPD a port
SPD and the protected circuit in parallel. A port can have a separate input and output terminals, between these terminals are not special series
impedance.
3.3
SPD two-portSPD two-port
There are two groups of input and output ports namely terminals SPD, between the input and output terminals have a special series impedance.
3.4
Voltage switching type SPD voltageswitchingtypeSPD
It has a high impedance when no surge, when the surge voltage in response to a low impedance can be mutated to the SPD. Voltage switching type SPD common element
Member has a discharge gap, gas discharge tubes, thyristors (silicon controlled rectifier) and bidirectional triode thyristor.
3.5
Voltage-limited SPD voltagelimitingtypeSPD
No high surge impedance, but as the surge current and voltage rise, which will continue to reduce the impedance of the SPD. common
Non-linear element is a varistor and suppression diode.
3.6
Compound SPD combinationSPD
By the voltage switching element and a voltage-limited components consisting of SPD. With its characteristic properties of the applied voltage can be expressed as voltage open
Off type, voltage-limited, or both.
3.7
Protected Mode modesofprotection
SPD protection element can be connected at the opposite phase, relatively, relatively neutral, neutral-to-ground, and combinations thereof. These connections are called protected mode
mode.
3.8
Nominal discharge current nominaldischargecurrent
In
SPD classification and class Ⅰ peak current flowing through the SPD having an 8/20 waveform for class Ⅱ test, trial SPD Ⅱ class pre
Treatment test.
3.9
The impact of current impulsecurrent
Iimp
It is defined by three parameters. current peak value Ipeak, charge amount Q and specific energy W/R.
Note. The SPD for class Ⅰ test classification.
3.10
Ⅱ class test the maximum discharge current maximumdischargecurrentforclassⅡtest
Imax
Flow through the SPD, with a peak current waveform 8/20, and its value according to Class Ⅱ operating duty test procedures for the determination. Imax shall be greater than In.
3.11
Maximum continuous operating voltage maximumcontinuousoperatingvoltage
Uc
The maximum AC voltage can be continuously applied to the SPD protected mode rms or dc voltage.
3.12
Standby power consumption standbypowerconsumption
Pc
SPD connection according to the manufacturer's instructions, the voltage applied to the balance and equilibrium phase angle of maximum continuous operating voltage (Uc) and without load
SPD power consumed.
3.13
Freewheeling folowcurrent
If
After the impact of the discharge current, the power supply current flowing into the SPD. Wheeling and continuous operating current Ic are apparently different.
3.14
Rated load current ratedloadcurrent
IL
To provide protection to the connection to the SPD load on the output maximum continuous rated AC rms current or direct current.
3.15
Voltage protection level voltageprotectionlevel
Up
Characterization SPD limits voltage between the terminals of performance parameters, the value can be selected from a list of priority values. This value should be greater than the limit voltage
The highest value.
3.16
Limit voltage measuredlimitingvoltage
When applying a predetermined waveform and amplitude of the impact between the SPD terminals measured maximum peak voltage.
3.17
Residual pressure residualvoltage
Ures
When the discharge current flows through the SPD, in between its terminals generate voltage peaks.
3.18
Temporary overvoltage test values temporaryovervoltagetestvalue
UT
Applied to the SPD and continues for a prescribed time test voltage to simulate stress at TOV conditions.
3.19
Two-port SPD on the load side surge withstand capability load-sidesurgewithstandcapabilityforatwo-portSPD
Two-port SPD output terminals withstand the downstream side of the load generating capacity surges.
3.20
Voltage drop (expressed as a percentage) (inpercent) voltagedrop
ΔU = [(U -U Input Output)/U Enter] × 100%
Where.
U input --- Input voltage;
U output --- the same time in connection rated resistive load conditions measured output voltage. This parameter applies only to two-port SPD.
3.21
Insertion loss insertionloss
At a given frequency, the power supply system connected to a given insertion loss is defined as the SPD. SPD after the access point close to the power line,
SPD subjects before and after the access voltage ratio, results are expressed in decibels.
NOTE. its requirements and tests are under consideration.
3.22
1.2/50 impulse voltage 1.2/50voltageimpulse
Virtual front time of 1.2μs, half the peak time of 50μs impulse voltage.
Note 1. The wave front time according to GB/T 16927.1 defined as 1.67 × (t90-t30), where t90 and t30 refers to the rising waveform 90% of the peak and 30%
Point.
Note 2. The half-value refers to the origin of the apparent peak in time falling between the 50% point. Depending on the rising edge after the peak refers to the origin of the waveform 30%
And 90% of two stippled line and U = 0 line intersection.
3.23
8/20 impulse current 8/20currentimpulse
Virtual front time 8μs, half the peak time of 20μs surge current.
Note 1. The wave front time according to GB/T 16927.1 defined as 1.25 × (t90-t10), where t90 and t10 refers to 90% of the rising edge of the waveform peak and 10%
Point.
Note 2. The half-value refers to the origin of the apparent peak in time falling between the 50% point. It refers to the apparent origin of the rising waveform after 10% of the peak and
90% of two straight dotted with I = 0 line intersection.
3.24
Complex wave combinationwave
Composite shock waves generated by the generator is applied 1.2/50 shock open circuit voltage, short circuit current is applied to the impact of 8/20. To the SPD
Voltage, current amplitude and waveform generator and impacted by the shock effect of the impedance of the SPD may be. Peak open circuit voltage and short circuit current
Peak ratio of 2 ohms; defined as the ratio of the virtual impedance Zf. Short-circuit current indicated by symbol Isc. Open circuit voltage indicated by symbol Uoc.
3.25
Thermal runaway thermalrunaway
When the SPD to withstand power loss and cooling capacity than the housing of the connector, the internal components temperature gradually increased, eventually leading to its
Damage process.
3.26
Thermal stability thermalstability
After the SPD maximum continuous temperature rise caused by the operation of the load test, under specified ambient temperature conditions applied to the SPD provisions
Operating voltage, if the SPD and the temperature can be decreased with time, is considered to be thermally stable SPD.
3.27
Degradation degradation
Because of the surge, resulting in changes in SPD original performance parameters affect the use or adverse environments.
3.28
Short-circuit current withstand capability short-circuitwithstand
SPD can withstand the maximum expected short-circuit current.
3.29
SPD disconnector SPDdisconnector
The system is disconnected from the power supply device SPD required (internal and/or external)
NOTE. This device does not require disconnecting isolation, it can be used to prevent system failures continued SPD fault indication is given. It may have more than one
Off function, such as over-current protection and thermal protection. These features can be combined in one apparatus or by several means complete.
3.30
Shell protection (IP code) degreesofprotectionprovidedbyenclosure (IPcode)
Provide housing to prevent contact with hazardous components against external solid foreign objects and/or prevent water from entering the housing degree of protection
(See GB 4208).
3.31
Type test typetests
SPD design and development of a new test conducted upon completion, is usually used to determine the typical performance, and to demonstrate its compliance with the relevant standard
quasi. Generally do not need to repeat the test after completion of the test, except when the design changes that affect its performance only when the need to re-do related projects
test.
3.32
Routine tests routinetests
Required for each test or SPD members and materials, in order to ensure that products meet the design specifications.
3.33
Acceptance tests acceptancetests
By agreement between, on the order of the SPD or the typical test items made again.
3.34
Decoupling network decouplingnetwork
When SPD current test is used to prevent surge energy fed back into the grid means. Sometimes called "inverse filter."
3.35 Impact test classification
3.35.1
Class Ⅰ test classⅠtest
3.8 is defined by the nominal discharge current In, the largest impact of 1.2/50 impulse voltage of 3.22 and 3.9 define the definition of class Ⅰ trial
Current Iimp tests carried out.
3.35.2
Ⅱ class testing classⅡtest
3.8 is defined by the nominal discharge current In, the maximum discharge Ⅱ type test 1.2/50 impulse voltage of 3.22 and 3.10 to define the definition of
Current Imax tests conducted.
3.35.3
Ⅲ class testing classⅢtest
3.24 defined by the composite wave (1.2/50,8/20) carried out tests.
3.36
Overcurrent protection overcurrentprotection
Located outside of the front end of SPD, as part of an overcurrent device electrical device (such as a circuit breaker or fuse).
3.37
Residual current device (RCD) residualcurrentdevice (RCD)
Under specified conditions, when the residual current or unbalanced current reaches a given value to make electrical contacts to open mechanical switch or a combination
Appliances.
3.38
Voltage switching type SPD discharge voltage sparkovervoltageofavoltageswitchingSPD
SPD gap between the electrodes, the maximum breakdown voltage before the discharge.
3.39
Class Ⅰ test specific energy W/R specificenergyW/RforclassⅠtest
When the impulse current Iimp flows through resistance 1Ω unit of energy consumed. It is equal to the square of the current time integral of W/R = ∫i2dt.
3.40
Power supply prospective short circuit current prospectiveshort-circuitcurrentofapowersupply
Ip
A given position in the circuit, if possible with a stream of negligible impedance connection over the short-circuit current.
3.41
Rated opening freewheeling value folowcurrentinterruptingrating
Ifi
SPD itself capable of disconnecting the prospective short circuit current.
3.42
Residual flow residualcurrent
IPE
SPD connection according to the manufacturer's instructions, apply the maximum continuous operating voltage (Uc), the flow through the PE terminals current.
3.43
Status Indicator statusindicator
SPD operating state indication means.
Note. These indicators can be visual body and/or audible alarm, and/or with remote signaling devices and/or output contacts capacity.
3.44
(Alarm) output terminal outputcontact
It included in the main circuit separate from the circuit in and out of contact with the SPD or the connection status indicator.
3.45
N...
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