BETA Low-Voltage Circuit Protection

Transcription

1 Siemens AG 9 BETA Low-Voltage Circuit Protection Characteristic curves for fuses and information on configuration for catalog ET B1 Catalog Add-On ET B1 AO 9 & # # # Answers for industry.

2 Siemens AG 9 Related Catalogs Contents ALPHA Distribution Boards and Terminal Blocks Order No.: pdf only: (E8-K81-A11-A9-7 ET A1 ALPHA SIMBOX Small Distribution Boards SIMBOX 3, SIMBOX LC, SIMBOX WP ALPHA 1 - DIN Wall-Mounted Distribution Boards ALPHA - DIN Wall-Mounted Distribution Boards ALPHA 3 - DIN Floor-Mounted Distribution Boards ALPHA AS Modular Distribution Boards ALPHA Modular Distribution Boards up to1 A ALPHA -ZS Meter Cabinets ALPHA BOX ALPHA 8HP Molded-Plastic Distribution Systems Planning and Configuration ALPHA FIX terminal blocks: Screw Terminals, Terminals with Spring-Loaded Connection, Combination Plug-In Terminals, Plug-In Terminals, Insulation Displacement Terminals, Accessories for Terminal Blocks ALPHA -ZS Meter Cabinets Order No.: Regional catalogs available on request (available in German only ET A Region Z1 Region Z Region Z3 Region Z BETA Low-Voltage Circuit Protection Order No.: pdf only: (E8-K8-A11-B1-7 GAMMA Building Management Systems Order No.: pdf only: (E8-K83-A11-A9-7 ET B1 Protecting: Miniature Circuit Breakers Residual Current Protective Devices Low-VoltageFuse Systems SR Busbar Systems Overvoltage Protection Devices Switching: Switches and Light Indicators Switching Devices Timers Transformers, Bells and Socket Outlets Measuring: Three-Phase Measuring Devices Single-Phase Measuring Devices Monitoring: Monitoring of Electrical Values Monitoring of Plants and Devices ET G1 Display, Operation Output Devices Input Devices Combination Devices Lighting Sun Protection, Anti-glare Protection, Utilization of Daylight Heating, Cooling, Ventilation, Air-conditioning Load Management Safety Quick-assembly Systems Gateways, Interface Converters Physical Sensors Control and Automation Devices System Products System Accessories Counters Wave DELTA Switches and Socket Outlets Order No.: pdf only: (E8-K8-A11-A9-7 ET D1 i-system DELTA line DELTA vita DELTA miro DELTA profil DELTA style DELTA natur DELTA ambiente m-system Surface-Mounting Product Range Switching/Pushbutton Control/Dimming Motion Detectors Shutter/Blind Controls Room Temperature Controllers Data and Communication Systems Remote Control Systems Smoke Detectors GAMMA Bus Coupling Unit The Offline Mall Order No.: E8-D1-A51-C7-7 (DVD CA 1 All products of automation, drives and installation technology, including those in the catalogs listed above. The Online Mall Internet: All products of automation, drives and installation technology, including those in the catalogs listed above. Catalog-PDF Internet: All catalogs for electrical installation technology can be downloaded as PDF files. Registered trademarks All product designations may be registered trademarks or product names of Siemens AG or other supplying companies. Third parties using these trademarks or product names for their own purposes may infringe upon the rights of the trademark owners. Further information about electrical installation is available on the Internet at: Technical Assistance Expert technical assistance for Low-voltage controls and electrical installation. Tel: +9 ( * Fax: +9 ( * ad.support@siemens.com *.1 /min. from a German landline network, mobile telephone prices may vary

3 BETA Low-Voltage Circuit Protection Catalog Add-On ET B1 AO 9 Characteristic curves for fuses and information on configuration for catalog ET B1 Siemens AG 9 The products and systems listed in this catalog are developed and manufactured using a VDE-approved quality management system according to EN ISO 91:. Protecting 1 Miniature Circuit Breakers Residual Current Protective Devices Low-Voltage Fuse Systems SR Busbar Systems Overvoltage Protection Devices 3 5 Switching 7 Switches and Light Indicators Switching Devices 8 Timers Transformers, Bells and Socket Outlets 9 1 Replaces: Catalog ET B1 AO 8, Characteristic curves for catalog ET B1 The products in this catalog can be also found in the electronic catalog CA 1. Order No.: E8-D1-A51-C7-7 (DVD Contact your local Siemens representative Siemens AG 9 Measuring 11 Three-Phase Measuring Devices Single-Phase Measuring Devices 1 Monitoring 13 Monitoring of Electrical Values Monitoring of Plants and Devices Appendix 1 15

4 Siemens AG 9 Siemens ET B1 AO 9, Characteristic curves for fuses

5 Siemens AG 9 Low-Voltage Fuse Systems 3 3/ Introduction 3 3/5 NEOZED fuse systems 3/7 DIAZED fuse systems 3/13 Cylindrical fuse systems 3/19 Class CC fuse systems 3/1 LV HRC fuse links Siemens ET B1 AO 9, Characteristic curves for fuses

6 Low-Voltage Fuse Systems Siemens AG 9 Introduction 3 Overview Rated voltage U n The rated voltage is the designated voltage of the fuse and and is used to determine its test conditions and operational voltage limits. For LV HRC and SITOR fuse links, the rated voltage is always the r.m.s. value of an AC voltage. In the case of NEOZED and DIAZED fuse links, a distinction is made between AC and DC voltage values. Rated current I n The rated current of a fuse link is the designated current of the fuse link and is the current up to which it can be continuously loaded under prescribed conditions without adverse affects. Rated frequency The rated frequency is the frequency for which the fuse link is rated with regard to power dissipation, current, voltage, characteristic curve and breaking capacity. Selectivity Several fuses are usually connected in series in one system. And when things get serious, selectivity ensures that only the faulty electrical circuit of a system is switched off and not the entire operational process. Siemens fuses of operational class gg, at an operational voltage of up to V AC and a ratio of 1:1.5, are interselective, i.e. from rated current level to rated current level. This is achieved by means of the considerably smaller spread of ±5 % of the time/ current characteristic curve, which far exceeds the demand for a ratio of 1:1. specified in the standard. It is therefore possible to use smaller conductor cross-sections due to the lower rated currents. Breaking capacity The rated breaking capacity is the highest prospective shortcircuit current l p that the fuse link can blow under prescribed conditions. A key feature of these fuses is their high rated breaking capacity with the smallest footprint. The basic demands and circuit data for tests voltage, power factor, actuating angle, etc. are specified in both national (DIN VDE 3 and international (IEC 9 regulations. However, for a constant failsafe breaking capacity, from the smallest non-permissible overload current through to the highest breaking current, a number of quality characteristics need to be taken into account when designing and manufacturing fuse links. These include the design of the fuse element with regard to dimensions and punch dimension and its position in the fuse body, as well as its compressive strength and the thermal resistance of the body. The chemical purity, particle size and the density of the quartz sand also play a key role. The rated breaking capacity for AC voltage for NEOZED and the majority of DIAZED fuses - is 5 ka, and in the case of our LV HRC fuses, it is even 1 ka. The various type ranges of SITOR fuses have different switching capacities ranging from 5 to 1 ka.. Faster arcing and precise arc quenching are the requirements for a reliable breaking capacity. Operational classes Fuses are categorized according to function and operational classes. The first letter defines the function class and the second the object to be protected: 1st letter a = Partial range protection (accompanied fuses: Fuse links that carry currents at least up to their rated current and can switch currents above a specific multiple of their rated current up to their rated breaking current. g = Full range protection (general purpose fuses: Fuse links that can continuously carry currents up to at least their specified rated current and can switch currents from the smallest melting current through to the breaking current. Overload and short-circuit protection. nd letter G = Cable and line protection (general applications M = Switching device protection in motor circuits (for protection of motor circuits R, S= Semiconductor protection/thyristor protection (for protection of rectifiers L = Cable and line protection (in acc. with the old, no longer valid DIN VDE B = Mine equipment protection Tr = Transformer protection The designations slow and quick still apply for DIAZED fuses. These are defined in IEC/CEE/DIN VDE. In the case of quick characteristics, the fuse blows in the breaking range faster than those of the gg operational class. In the case of DIAZED fuse links for DC railway network protection, the slow characteristic is particularly suitable for switching off direct currents with greater inductance. Both characteristics are also suitable for the protection of cables and lines. Full range fuses (gg, gr, quick, slow reliably break the current in the event of non-permissible overload and short-circuit currents. Partial range fuses (am, ar exclusively serve short-circuit protection. 3/ Siemens ET B1 AO 9, Characteristic curves for fuses

7 Siemens AG 9 Low-Voltage Fuse Systems The following operational classes are included in the product range: gg (DIN VDE/IEC = Full range cable and line protection am (DIN VDE/IEC = Partial range switching device protection ar (DIN VDE/IEC = Partial range semiconductor protection gr (DIN VDE/IEC = Full range semiconductor protection gs (DIN VDE/IEC = Full range semiconductor protection and cable and line protection Quick(DIN VDE/IEC/CEE = Full range cable and line protection Slow (DIN VDE = Full range cable and line protection Characteristic curves (Time/current characteristic curves The time/current characteristic curve specifies the virtual time (e.g. the melting time as a function of the prospective current under specific operating conditions. Melting times of fuse links are shown in the time/current diagrams with logarithmic scale and depending on their currents. The melting time characteristic curve runs from the smallest melting current, which just about melts the fuse element, asymptotic to the I t lines of the same melting heat value in the range of the higher short-circuit currents, which specifies the constant melting heat value I t. To avoid overcomplication, the time/ current characteristic curves diagrams omit the I t lines (c. 1 9 J [s] 1 5 a Introduction Virtual time t v The virtual time is the time span calculated when a I t value is divided by the square of the prospective current: t v = i dt I p The time/current characteristic curve specifies the prospective current I p and the virtual melting time t vs. Prospective short-circuit current I p The prospective short-circuit current is the r.m.s. value of the line-frequency AC component, or the value of the direct current to be expected in the event of a short-circuit occurring after the fuse, were the fuse to be replaced by a component of negligible impedance. Let-through current characteristic curves The let-through current characteristic curve specifies the value of the let-through current at 5 Hz as a function of the prospective current. The let-through current I c is the maximum instantaneous value of the current reached during a switching operation of the fuse. The fuse element of the fuse links melts so quickly at very high currents that the surge short-circuit current I p is prevented from occurring. The highest instantaneous value of the current reached during the shutdown cycle is called the let-through current I c. The current limitations are specified in the current limiting diagrams, otherwise known as let-through current diagrams c b I : Arc voltage min 1 1 [A] I_99a General representation of the time/current characteristic curve of a fuse link of gl/gg operational class I min : Smallest melting current a: Melting time characteristic curve b: OFF time characteristic curve c: I t line The shape of the characteristic curve depends on the outward heat transfer from the fuse element. DIN VDE 3 specifies tolerance-dependent time/current ranges within which the characteristic curves of the fuse must lie. Deviations of ± 1 % are permissible in the direction of the current axis. With Siemens LV HRC fuse links of gg operational class, the deviations work out at less than ± 5 %, a mark of our outstanding production accuracy. For currents up to approx. I n, the melting timecurrent characteristic curves are the same as the OFF time characteristic curves. In the case of higher short-circuit currents, the two characteristic curves move apart, influenced by the respective arc quenching time. The difference between both lines (= arc quenching time also depends on the power factor, the operational voltage and the breaking current. The Siemens characteristic curves show the mean virtual melting time characteristic curves recorded at an ambient temperature of ( ± 5 C. They do not apply to preloaded fuse links. 1 1 P c s L 1c : Maximum let-through current s : Pre-arcing time L : Arcing time 1 P : Peak short-circuit current Oscillograph of a short-circuit current shutdown through a fuse link J I_997b Siemens ET B1 AO 9, Characteristic curves for fuses 3/3

8 Low-Voltage Fuse Systems Siemens AG 9 3 Introduction Current limitation As well as a failsafe rated breaking capacity, the current-limiting effect of a fuse link is of key importance for the cost effectiveness of a system. In the event of short-circuit breaking by a fuse, the breaking current continues to flow through the network until the fuse link is switched off. However, the breaking current is limited by the system impedance. The simultaneous melting of all the bottlenecks of a fuse element produce a sequence of tiny partial arcs that ensure a fast breakingoperation with strong current limitation. The current limitation is also strongly influenced by the production quality of the fuse which in the case of Siemens fuses is extremely high. For example, an LV HRC fuse link, size ( A limits a breaking current with a possible r.m.s. value of approximately 5 ka to a letthrough current with a peak value of approx. 18 ka. This strong current limitation provides constant protection for the system against excessive loads. Current limitation diagram; let-through current diagram of LV HRC fuse links, size, operational class gl/gg, rated currents A, 1 A, 5 A, 1 A Legend t vs = Virtual melting time I c = Max. let-through current I eff = R.m.s. value of the prospective short-circuit current I t s = Melting I t value I t a = Breaking I tvalue I n P v = Rated current = Rated power dissipation DJ = Temperature rise k A = Correction factor for I t value U w = Recovery voltage Û s = i p = Peak short-circuit current with largest DC component % = Peak short-circuit current without DC component U i t s t L = Peak short-circuit current = Voltage 1 c = Current = Melting time = Arc quenching time 1 A 5 A 1 A A 1 eff I_998a Rated power dissipation Rated power dissipation is the power loss during the load of a fuse link with its rated current under prescribed conditions. The cost effectiveness of a fuse depends largely on the rated power dissipation (power loss. This should be as low as possible and have low self-heating. However, when assessing the power loss of a fuse, it must also be taken into account that there is a physical dependence between the rated breaking capacity and the rated power dissipation. On the one hand, fuse elements need to be thick in order to achieve the lowest possible resistance value, on the other, a high rated breaking capacity requires the thinnest possible fuse elements in order to achieve reliable arc quenching. Siemens fuses have the lowest possible rated power dissipation while also providing the highest possible load breaking reliability. These values lie far below the limit values specified in the regulations. This means low temperature rises, reliable breaking capacity and high cost effectiveness. I t value The I t value (joule integral is the integral of the current squared over a specific time interval: t 1 I t = i dt t Specifies the I t values for the melting process (I t s and for the shutdown cycle (I t A, sum of melting and quenching I t value. The melting I t value, also known as the total I t value or breaking I t value, is particularly important when dimensioning SITOR fuses for semiconductor protection. This value depends on the voltage and is specified with the rated voltage. Û s The peak arc voltage is the highest value of the voltage that occurs at the contacts of the fuse link during the arc quenching time. Residual value factor RW The residual value factor is a reduction factor for determining the permissible load period of the fuse link with currents that exceed the permissible load current I n ' (see rated current I n. This factor is applied when dimensioning SITOR fuses for semiconductor protection. Varying load factor WL The varying load factor is a reduction factor for the rated current with varying load states. This factor is applied when dimensioning SITOR fuses for semiconductor protection. Recovery voltage U w The recovery voltage (r.m.s. value is the voltage that occurs at the contacts of a fuse link after the power is cut off. 3/ Siemens ET B1 AO 9, Characteristic curves for fuses

9 ? Siemens AG 9 Low-Voltage Fuse Systems NEOZED fuse systems Characteristic curves Series 5SE Size: D1, D, D3 Operational class: gg Rated voltage: V AC/5 V DC Rated current:... 1 A Melting I t values diagram 3 I L I # # # & 1 & & % I I # & # # # 1 & & ' & & & F I I I I I & & & & A BB Table see page 3/. Current limitation diagram & # # # 1 & & & & & & & # Peak short-circuit current with largest DC component % Peak short-circuit current without DC component A BB Siemens ET B1 AO 9, Characteristic curves for fuses 3/5

10 Low-Voltage Fuse Systems Siemens AG 9 NEOZED fuse systems 3 Series 5SE Size: Operational class: Rated voltage: Rated current: D1, D, D3 gg V AC /5 V DC... 1 A Type I n P v DJ I t s I t a 1ms ms 3 V AC V AC (t < ms A W K A s A s A s A s 5SE SE SE SE SE 13-A SE SE SE SE SE SE SE SE SE SE / Siemens ET B1 AO 9, Characteristic curves for fuses

11 ? Siemens AG 9 Low-Voltage Fuse Systems DIAZED fuse systems Characteristic curves Series 5SA Size: E1 Characteristic: slow Rated voltage: 5 V AC/5 V DC Rated current:... 5 A Melting I t values diagram 3 I L I 1 '? I I # 1 % # #? # # I I I I I & & & & A BB Current limitation diagram # & & A BB & 1 % > Type I n P v DJ I t s 1ms ms A W K A s A s 5SA SA SA SA SA SA SA # Type I t a 3 V AC 3 V AC 5 V AC A s A s A s 5SA SA 1 3 5SA SA SA SA SA & & & # A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Siemens ET B1 AO 9, Characteristic curves for fuses 3/7

12 Low-Voltage Fuse Systems Siemens AG 9 3 DIAZED fuse systems Series 5SA1 Size: E1 Characteristic: quick Rated voltage: 5 V AC/5 V DC Rated current:... 5 A Melting I t values diagram I L I 1 & > I I # 1 % > I I I I I # # & & & & A BB Current limitation diagram? & & A BB & # 1 # Type I n P v A W 5SA SA SA SA SA SA SA & & & # & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component 3/8 Siemens ET B1 AO 9, Characteristic curves for fuses

13 ? Siemens AG 9 Low-Voltage Fuse Systems DIAZED fuse systems Series 5SB, 5SB, 5SC Size: DII, DIII, DIV Operational class: gg Rated voltage: 5 VAC/5 V DC Rated current:... 1 A Melting I t values diagram 3 I L I # # # & 1 % # # = I I # 1 % # # = & # # # I I I I I & & & & A BB Current limitation diagram # & & & Peak short-circuit current with largest DC component % Peak short-circuit current without DC component & A BB & # # # & & # A BB 1 # # > Type I n P v DJ I t s 1ms ms A W K A s A s 5SB SB SB SB SB SB SB SB SB SB SB SC SC Type I t a 3 V AC 3 V AC 5 V AC A s A s A s 5SB SB SB SB SB SB SB SB SB SB SB SC SC Siemens ET B1 AO 9, Characteristic curves for fuses 3/9

14 Low-Voltage Fuse Systems Siemens AG 9 3 DIAZED fuse systems Series 5SB1, 5SB3, 5SC1 Size: DII, DIII, DIV Operational class: quick Rated voltage: 5 V AC/5 V DC Rated current:... 1 A Melting I t values diagram I L I # # # & 1 & % > I I # 1 % & > & # # # I I I I I & & & & A BB Current limitation diagram? & & & A BB & # # # 1 # Type I n P v DJ I t s I t a ms 5 V AC A W K A s A s 5SB SB SB SB1 1, 5SB SB SB SB SB SB SB SC SC & & & # & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component 3/1 Siemens ET B1 AO 9, Characteristic curves for fuses

15 ? Siemens AG 9 Low-Voltage Fuse Systems DIAZED fuse systems Series 5SD8 Size: DIII Operational class: gg Rated voltage: 9 V AC/ V DC Rated current:... 3 A Melting I t values diagram 3 I L I 1? I I # 1 # > # # # # # I I I I I & & & & A BB Current limitation diagram & & A BB # # # & 1 % = Type I n P v I t s I t a ms V AC A W A s A s 5SD SD8 1. 5SD SD SD SD SD SD SD SD & & & # A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Siemens ET B1 AO 9, Characteristic curves for fuses 3/11

16 ? Low-Voltage Fuse Systems Siemens AG 9 3 DIAZED fuse systems Series 5SD Size: DIII Operational class: quick (railway network protection Rated voltage: 75 V AC/75 V DC Rated current:... 3 A Melting I t values diagram [s] vs I1 _8b I I # # 1 % % > 1 # # A 1 A A 35 A 3 A A A 1 A 5 A 5 A I 1-1 I I I I 1 - & & & & A BB Current limitation diagram eff [A] # # # = Type I n P v I t s I t a ms 5 V AC A W A s A s 5SD SD SD SD SD SD SD SD SD SD & & & # A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component 3/1 Siemens ET B1 AO 9, Characteristic curves for fuses

17 ? Siemens AG 9 Low-Voltage Fuse Systems Cylindrical fuse systems Characteristic curves Series 3NW Size: 1 mm 38 mm Operational class: gg Rated voltage: 5 V AC (... 5 A, V AC (3 A Rated current:... 3 A Melting I t values diagram 3 I L I & # 1 > I # J = 1 J I & # Current limitation diagram & & A BB # & 1 # # % > Type I n P v DJ I t s I t a 1ms 3 V AC V AC 5 V AC A W K A s A s A s A s 3NW NW NW NW NW NW NW NW NW NW & & & # & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Siemens ET B1 AO 9, Characteristic curves for fuses 3/13

18 Low-Voltage Fuse Systems Siemens AG 9 3 Cylindrical fuse systems Series 3NW 1 Size: 1 mm 51 mm Operational class: gg Rated voltage: 5 V AC (... A, V AC (5 A Rated current:... 5 A Melting I t values diagram I L I & # # 1 > I # # J = J I 1 # ' '? & # # Current limitation diagram [A] c 1 3 & & A BB 1 1 & 5 A A 3 A 5 A A 1 A 1 A 1 A 8 A A A I_5c Type I n P v DJ I t s I t a 1ms 3 V AC V AC 5 V AC A W K A s A s A s A s 3NW NW NW NW NW NW NW , NW NW NW NW eff [A] Peak short-circuit current with largest DC component % Peak short-circuit current without DC component 3/1 Siemens ET B1 AO 9, Characteristic curves for fuses

19 ? Siemens AG 9 Low-Voltage Fuse Systems Cylindrical fuse systems Series 3NW Size: mm 58 mm Operational class: gg Rated voltage: 5 V AC ( A, V AC (1 A Rated current: A Melting I t values diagram 3 I L I & # # & 1 > I # # J = J I 1? & # # & Current limitation diagram & & A BB & # # & & 1 # # & > Type I n P v DJ I t s I t a 1ms 3 V AC V AC 5 V AC A W K A s A s A s A s 3NW NW NW NW NW NW NW NW NW NW NW NW & & # & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Siemens ET B1 AO 9, Characteristic curves for fuses 3/15

20 ? Low-Voltage Fuse Systems Siemens AG 9 3 Cylindrical fuse systems Series 3NW 3.-1 Size: 8 mm 3 mm Operational class: gg Rated voltage: V AC Rated current:... A Melting I t values diagram I L I 1 # > I J = 1? J I Current limitation diagram & & A BB & Type I n P v DJ I t s I t a 1ms V AC A W K A s A s 3NW NW NW NW NW NW # # ' > & & # & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component 3/1 Siemens ET B1 AO 9, Characteristic curves for fuses

21 ? Siemens AG 9 Low-Voltage Fuse Systems Cylindrical fuse systems Series 3NW8 Size: Operational class: Rated voltage: Rated current: 1 mm 38 mm 1 mm 51 mm mm 58 mm am 5 V AC, V AC (3NW8 1-1, 3NW8 3-1, A Melting I t values diagram 3 I L I 1 # % > I # J = 1 ' ' # > # & # # & # J I & & & A BB # & # # & Current limitation diagram & # # & # 1 # > & & & & # A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Siemens ET B1 AO 9, Characteristic curves for fuses 3/17

22 ? Low-Voltage Fuse Systems Siemens AG 9 3 Cylindrical fuse systems Series 3NW8 Size: Operational class: Rated voltage: Rated current: 1 mm 38 mm 1 mm 51 mm mm 58 mm am 5 V AC V AC (3NW8 1-1, 3NW A Melting I t values diagram I L I 1 # % > I # J = 1 ' ' # > # & # # & # J I & & & A BB # & # # & Current limitation diagram & # # & # 1 # > & & & & # A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component 3/18 Siemens ET B1 AO 9, Characteristic curves for fuses

23 Siemens AG 9 Low-Voltage Fuse Systems Characteristic curves Series 3NW1...-HG Series 3NW...-HG Class CC fuse system 3 [s] Virtual melting time t vmt ,5 A, A,75 A,8 A 1 A 1,15 A 1,5 A 1,5 A 1,8 A A,5 A 3 A 3, A 3,5 A A 5 A 5, A A,5 A 7 A 7,5 A I_11 [s] t vmt Virtual melting time A A 3 A 5 A 8 A 1 A 15 A A 3 A I_ Prospective short-circuit current p [A] Prospective short-circuit current p [A] Series 3NW1...-HG Series 3NW3...-HG [s] Virtual melting time t vmt A A 3 A I_111 [s] t vmt Virtual melting time ,5 A, A,8 A 1 A 1,5 A 3 A 3,5 A A A,5 A 8 A 1 A 1 A 15 A A 5 A 3 A I_ Prospective short-circuit current p [A] Prospective short-circuit current p [A] Siemens ET B1 AO 9, Characteristic curves for fuses 3/19

24 Low-Voltage Fuse Systems Siemens AG 9 3 Class CC fuse system Series 3NW3...-HG Current limitation diagram c [A] A 5 A A 15 A,8 A 1,5 A I_ p [A] 3/ Siemens ET B1 AO 9, Characteristic curves for fuses

25 ? Siemens AG 9 Low-Voltage Fuse Systems LV HRC fuse links Series 3NA3 Size: Operational class: gg Rated voltage: 5 V AC/ V DC Rated current:... 1 A Melting I t values diagram 3 I L I # # # & # 1 & & = I I % I I I I I 1 & > # # & # # # & & & & # A BB Current limitation diagram & & & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component # & # # # & & # & A BB 1 = Type I n P v DJ I t s 1ms ms A W K A s A s 3NA NA NA NA NA NA NA NA NA NA NA NA NA NA Type I t a 3 V AC V AC 5 V AC A s A s A s 3NA NA NA NA NA NA NA NA NA NA NA NA NA NA Siemens ET B1 AO 9, Characteristic curves for fuses 3/1

26 ? Low-Voltage Fuse Systems Siemens AG 9 3 LV HRC fuse links Series 3NA3 1, 3NA 1, 3NA7 1 Size: 1 Operational class: gg Rated voltage: 5 V AC/ V DC Rated current: A Melting I t values diagram I L I # # # & # # 1? I I % 1 & > # # # & # # I I # I I I & & & & # A BB Current limitation diagram & & & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component # # & # # # & & # & A BB 1 # > Type I n P v DJ I t s 1ms ms A W K A s A s 3NA3 15, 3NA 15, 3NA NA3 17, 3NA 17, 3NA NA3 11, 3NA 11, 3NA NA3 11, 3NA 11, 3NA NA3 117, 3NA 117, 3NA NA3 1, 3NA 1, 3NA NA3 1, 3NA 1, 3NA NA3 1, 3NA 1, 3NA NA3 13, 3NA 13, 3NA NA3 13, 3NA 13, 3NA NA3 13, 3NA 13, 3NA NA3 1, 3NA 1, 3NA NA3 1, 3NA 1, 3NA NA3 1, 3NA 1, 3NA Type I t a 3 V AC V AC 5 V AC A s A s A s 3NA3 15, 3NA 15, 3NA NA3 17, 3NA 17, 3NA NA3 11, 3NA 11, 3NA NA3 11, 3NA 11, 3NA NA3 117, 3NA 117, 3NA NA3 1, 3NA 1, 3NA NA3 1, 3NA 1, 3NA NA3 1, 3NA 1, 3NA NA3 13, 3NA 13, 3NA NA3 13, 3NA 13, 3NA NA3 13, 3NA 13, 3NA NA3 1, 3NA 1, 3NA NA3 1, 3NA 1, 3NA NA3 1, 3NA 1, 3NA / Siemens ET B1 AO 9, Characteristic curves for fuses

27 ? Siemens AG 9 Low-Voltage Fuse Systems LV HRC fuse links Series 3NA3 1..-, 3NA 1..-, 3NA Size: 1 Operational class: gg Rated voltage: 9 V AC/ V DC Rated current: 5... A Melting I t values diagram 3 I L I # & # 1 = I I & % I I I I I 1 > # # & # & & & # & A BB Current limitation diagram & & A BB # & # & 1 = Type I n P v DJ I t s 1ms ms A W K A s A s 3NA3 1-, 3NA 1-, 3NA NA3 1-, 3NA 1-, 3NA NA3 1-, 3NA 1-, 3NA NA3 13-, 3NA 13-, 3NA NA3 13-, 3NA 13-, 3NA NA3 13-, 3NA 13-, 3NA NA3 1-, 3NA 1-, 3NA Type I t a 3 V AC V AC 9 V AC A s A s A s 3NA3 1-, 3NA 1-, 3NA NA3 1-, 3NA 1-, 3NA NA3 1-, 3NA 1-, 3NA NA3 13-, 3NA 13-, 3NA NA3 13-, 3NA 13-, 3NA NA3 13-, 3NA 13-, 3NA NA3 1-, 3NA 1-, 3NA & & # & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Siemens ET B1 AO 9, Characteristic curves for fuses 3/3

28 ? Low-Voltage Fuse Systems Siemens AG 9 3 LV HRC fuse links Series 3NA3, 3NA, 3NA7 Size: Operational class: gg Rated voltage: 5 V AC/ V DC Rated current: A Melting I t values diagram I L I # # & # # # # # 1 & # = I I ' & I I I I 1 % ' > % I # # # # # # & # # & & & # & A BB & Current limitation diagram & & & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component # # # # # & # # & # & A BB 1 = Type I n P v DJ I t s 1ms ms A W K A s A s 3NA3 1, 3NA 1, 3NA NA3, 3NA, 3NA NA3, 3NA, 3NA NA3, 3NA, 3NA NA3 3, 3NA 3, 3NA NA3 3, 3NA 3, 3NA NA3 3, 3NA 3, 3NA NA3, 3NA, 3NA NA3, 3NA, 3NA NA3, 3NA, 3NA NA3 5, 3NA NA3 5, 3NA 5, 3NA NA3 5, 3NA NA3, 3NA, 3NA Type I t a 3 V AC V AC 5 V AC A s A s A s 3NA3 1, 3NA 1, 3NA NA3, 3NA, 3NA NA3, 3NA, 3NA NA3, 3NA, 3NA NA3 3, 3NA 3, 3NA NA3 3, 3NA 3, 3NA NA3 3, 3NA 3, 3NA NA3, 3NA, 3NA NA3, 3NA, 3NA NA3, 3NA, 3NA NA3 5, 3NA NA3 5, 3NA 5, 3NA NA3 5, 3NA NA3, 3NA, 3NA / Siemens ET B1 AO 9, Characteristic curves for fuses

29 Siemens AG 9 Low-Voltage Fuse Systems LV HRC fuse links Series 3NA3..-, 3NA..-, 3NA7..- Size: Operational class: gg Rated voltage: 9 V AC/ V DC Rated current: A Melting I t values diagram 3 I L I # # # & 1 % # ' = I I ' & % I I I I I 1 % # = # # # # & & & & # & A BB Current limitation diagram [A] c & & A BB & # 3/315 A 5 A A A 1 A 15 A 1 A 8 A I1_75b eff [A] Type I n P v DJ I t s 1ms ms A W K A s A s 3NA3 -, 3NA -, 3NA NA3 3-, 3NA 3-, 3NA NA3 3-, 3NA 3-, 3NA NA3 3-, 3NA 3-, 3NA NA3 -, 3NA -, 3NA NA3 -, 3NA -, 3NA NA3 -, 3NA -, 3NA NA3 5-, 3NA 5-, 3NA NA3 5-, 3NA 5-, 3NA Type I t a 3 V AC V AC 9 V AC A s A s A s 3NA3 -, 3NA -, 3NA NA3 3-, 3NA 3-, 3NA NA3 3-, 3NA 3-, 3NA NA3 3-, 3NA 3-, 3NA NA3 -, 3NA -, 3NA NA3 -, 3NA -, 3NA NA3 -, 3NA -, 3NA NA3 5-, 3NA 5-, 3NA NA3 5-, 3NA 5-, 3NA Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Siemens ET B1 AO 9, Characteristic curves for fuses 3/5

30 ? Low-Voltage Fuse Systems Siemens AG 9 3 LV HRC fuse links Series 3NA3 3 Size: 3 Operational class: gg Rated voltage: 5 V AC/ V DC Rated current:... 3 A Melting I t values diagram I L I # # # # # # 1 # = I I ' & % I I I I I 1 % > # # # # # # # & & & # & A BB Current limitation diagram # & & & A BB # # Peak short-circuit current with largest DC component % Peak short-circuit current without DC component # # # # & # & # & A BB 1 = Type I n P v DJ I t s 1ms ms A W K A s A s 3NA NA NA NA NA NA NA NA NA NA Type I t a 3 V AC V AC 5 V AC A s A s A s 3NA NA NA NA NA NA NA NA NA NA / Siemens ET B1 AO 9, Characteristic curves for fuses

31 ? Siemens AG 9 Low-Voltage Fuse Systems LV HRC fuse links Series 3NA Size: 3 Operational class: gg Rated voltage: 9 V AC/ V DC Rated current: A Melting I t values diagram 3 I L I # # # # # # 1 % # = I I ' & % I I I I I 1 % # = # # # # # # # & & & # & A BB Current limitation diagram # & & A BB # # # # # # & # 1 % # = Type I n P v DJ I t s 1ms ms A W K A s A s 3NA NA NA NA NA NA Type I t a 3 V AC V AC 9 V AC A s A s A s 3NA NA NA NA NA NA # & & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Siemens ET B1 AO 9, Characteristic curves for fuses 3/7

32 ? Low-Voltage Fuse Systems Siemens AG 9 3 LV HRC fuse links Series 3NA3 Size: (IEC design Operational class: gg Rated voltage: 5 V AC/ V DC Rated current: A Melting I t values diagram I L I # & 1 % # ' = I I ' & I I I I I 1 % # # > % # & # & & & # & A BB Current limitation diagram # & & A BB # & & # 1 % # # = Type I n P v DJ I t s 1ms ms A W K A s A s 3NA NA NA NA Type I t a 3 V AC V AC 5 V AC A s A s A s 3NA NA NA NA & # & & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component 3/8 Siemens ET B1 AO 9, Characteristic curves for fuses

33 ? Siemens AG 9 Low-Voltage Fuse Systems LV HRC fuse links Series 3NA3 Size: a Operational class: gg Rated voltage: 5 V AC/ V DC Rated current: A Melting I t values diagram 3 I L I # & # 1 ' = I I ' & I I I I I 1 % > % # & # # & & & # & A BB Current limitation diagram & & A BB & # 1 # % = Type I n P v DJ I t s 1ms ms A W K A s A s 3NA NA NA NA NA # # & # Type I t a 3 V AC V AC 5 V AC A s A s A s 3NA NA NA NA NA & # & & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Siemens ET B1 AO 9, Characteristic curves for fuses 3/9

34 ? Low-Voltage Fuse Systems Siemens AG 9 3 LV HRC fuse links Series 3NA3 8, 3NA 8, 3NA7 8 Size:, Operational class: gg Rated voltage: 5 V AC/5 V DC Rated current:... 1 A Melting I t values diagram I L I # # # & # 1 ' % > I I # # 1 & > I I I & # # # I I & & & A BB & & & & # A BB Table see page 3/31. Current limitation diagram # & # # # 1 # = & & # & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component 3/3 Siemens ET B1 AO 9, Characteristic curves for fuses

35 Siemens AG 9 Low-Voltage Fuse Systems LV HRC fuse links Series 3NA3 8, 3NA 8, 3NA7 8 Size:, Operational class: gg Rated voltage: 5 V AC/5 V DC Rated current:... 1 A 3 Type I n P v DJ I t s I t a 1ms ms 3 V AC V AC 5 V AC A W K A s A s A s A s A s 3NA3 8, 3NA 8, 3NA NA3 8, 3NA 8, 3NA NA3 81, 3NA 81, 3NA NA3 83, 3NA 83, 3NA NA3 85, 3NA 85, 3NA NA3 87, 3NA 87, 3NA NA3 81, 3NA 81, 3NA NA3 81, 3NA 81, 3NA NA3 81, 3NA3 81-7, 3NA 81, 3NA NA3 817, 3NA 817, 3NA NA3 8, 3NA3 8-7, 3NA 8, 3NA NA3 8, 3NA3 8-7, 3NA 8, 3NA NA3 8, 3NA3 8-7, 3NA 8, NA 8-7, 3NA7 8, 3NA NA3 83, 3NA3 83-7, 3NA 83, NA 83-7, 3NA7 83, 3NA NA3 83, 3NA 83, 3NA NA NA3 83, 3NA 83, 3NA NA Siemens ET B1 AO 9, Characteristic curves for fuses 3/31

36 ? Low-Voltage Fuse Systems Siemens AG 9 3 LV HRC fuse links Series 3NA3 8..-, 3NA 8..-, 3NA Size:, Operational class: gg Rated voltage: 9 V AC/5 V DC Rated current:... 1 A Melting I t values diagram I L I # # # & 1 # = I I # I I I I I 1 % > & # # # & & & & # A BB & Current limitation diagram & & & A BB & # # # & # & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component 1 # ' = Type I n P v DJ I t s 1ms ms A W K A s A s 3NA3 8-, 3NA 8-, 3NA NA3 8-, 3NA 8-, 3NA NA3 81-, 3NA 81-, 3NA NA3 83-, 3NA 83-, 3NA NA3 85-, 3NA 85-, 3NA NA3 87-, 3NA 87-, 3NA NA3 81-, 3NA 81-, 3NA NA3 81-, 3NA 81-, 3NA NA3 81-, 3NA 81-, 3NA NA3 817-, 3NA 817-, 3NA NA3 8-, 3NA 8-, 3NA NA3 8-, 3NA 8-, 3NA NA3 8-, 3NA 8-, 3NA NA3 83-, 3NA 83-, 3NA Type I t a 3 V AC V AC 9 V AC A s A s A s 3NA3 8-, 3NA 8-, 3NA NA3 8-, 3NA 8-, 3NA NA3 81-, 3NA 81-, 3NA NA3 83-, 3NA 83-, 3NA NA3 85-, 3NA 85-, 3NA NA3 87-, 3NA 87-, 3NA NA3 81-, 3NA 81-, 3NA NA3 81-, 3NA 81-, 3NA NA3 81-, 3NA 81-, 3NA NA3 817-, 3NA 817-, 3NA NA3 8-, 3NA 8-, 3NA NA3 8-, 3NA 8-, 3NA NA3 8-, 3NA 8-, 3NA NA3 83-, 3NA 83-, 3NA /3 Siemens ET B1 AO 9, Characteristic curves for fuses

37 ? Siemens AG 9 Low-Voltage Fuse Systems LV HRC fuse links Series 3NA 1..- Size: 1 Operational class: gg Rated voltage: V AC Rated current: A Melting I t values diagram 3 I L I # # & # # 1 & I I & % I I I I I 1 # # # & # # & & & # & A BB & Current limitation diagram # & & A BB # & & & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component # # & # # 1 ' Type I n P v DJ A W K 3NA NA NA NA NA NA NA NA NA NA NA Type I t s I t a 1ms ms 3 V AC V AC A s A s A s A s 3NA NA NA NA NA NA NA NA NA NA NA Siemens ET B1 AO 9, Characteristic curves for fuses 3/33

38 ? Low-Voltage Fuse Systems Siemens AG 9 3 LV HRC fuse links Series 3NA..- Size: Operational class: gg Rated voltage: V AC Rated current: 5... A Melting I t values diagram [s] vs A 3 A 8 A 1 A 15 A 1 A A A 5 A 3/ 315 A 355 A A I1_111a s [A s] s 1-1 s 1 - s 1-3 s 1 - s I1_113a A 355 A 3/ 315 A 5 A A A 1 A 15 A 1 A 8 A 3 A 5 A Current limitation diagram # eff [A] # & & & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component # # # # # & # eff [A] Type I n P v DJ A W K 3NA NA NA NA NA NA NA NA NA NA NA NA NA Type I t s I t a 1ms ms 3 V AC V AC A s A s A s A s 3NA NA NA NA NA NA NA NA NA NA NA NA NA /3 Siemens ET B1 AO 9, Characteristic curves for fuses

39 ? Siemens AG 9 Low-Voltage Fuse Systems LV HRC fuse links Series 3NA 8..-/-KK Size:, Operational class: gg Rated voltage: V AC Rated current: A Melting I t values diagram 3 I L I # # # & # 1 # I I % I I I I I 1 % # # & # # # & & & & # A BB Current limitation diagram & & & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component # & # # # & & # & A BB 1 Type I n P v DJ I t s 1 ms ms A W K A s A s 3NA NA NA NA NA NA NA NA NA NA 8-, 3NA 8-KK NA 83-, 3NA 83-KK NA NA Type I t a 3 V AC V AC A s A s 3NA NA NA NA NA NA NA NA NA NA 8-, 3NA 8-KK NA 83-, 3NA 83-KK NA NA Siemens ET B1 AO 9, Characteristic curves for fuses 3/35

40 ? Low-Voltage Fuse Systems Siemens AG 9 3 LV HRC fuse links Series 3ND1 8 Size:, Operational class: am Rated voltage: 5 V AC Rated current:... 1 A Melting I t values diagram I L I # # # & # 1 = I I % I I I I 1 % > & & A BB & # # & & & & # A BB & # # # Current limitation diagram # & # # # 1 # = Type I n P v DJ I t s 1ms ms A W K A s A s 3ND ND ND ND ND ND ND ND ND ND ND ND ND ND & & # & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Type I t a 3 V AC V AC 5 V AC A s A s A s 3ND ND ND ND ND ND ND ND ND ND ND ND ND ND /3 Siemens ET B1 AO 9, Characteristic curves for fuses

41 ? Siemens AG 9 Low-Voltage Fuse Systems LV HRC fuse links Series 3ND1 3.., 3ND Size: 1,, 3 Operational class: am Rated voltage: 9 V AC Rated current: A Melting I t values diagram 3 I L I & # # # # # # 1 > I I ' & I I I 1 > I % I # # # # # # # & Current limitation diagram & & A BB & # & & & # & A BB Table see page 3/38. # # # # # # # & 1 = & # & & A BB Peak short-circuit current with largest DC component % Peak short-circuit current without DC component Siemens ET B1 AO 9, Characteristic curves for fuses 3/37

42 Low-Voltage Fuse Systems Siemens AG 9 LV HRC fuse links 3 Series 3ND1 3.., 3ND Size: 1,, 3 Operational class: am Rated voltage: 9 V AC Rated current: A Type I n P v DJ I t s I t a 1ms ms 3 V AC V AC 9 V AC A W K A s A s A s A s A s 3ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND More information Load capability with increased ambient temperature The time/current characteristics of the NEOZED/DIAZED/LV HRC fuse links are based on an ambient temperature of C ±5 C in accordance with DIN VDE 3. If higher ambient temperatures are used (see diagram a lower load capability must be used. For example, at an ambient temperature of 5 C, an LV HRC fuse link is required that can handle 9 % of the rated current. While the short-circuit behavior is not influenced by an increased ambient temperature, it is influenced by overload and operation at rated value. Current carrying capacity [%] Ambient temperature [ C] I_8d Influence of the ambient temperature on the load capability of NEOZED, DIAZED and LV HRC fuses of gg operational class with natural convection in the distribution board. Assignment of cable and line protection When assigning fuses gg to cable and line protection in the event of an overload in compliance with DIN VDE 1 Part 3, the following conditions must be met: (1 I B = I n = I z (rated current rule ( I = 1.5 I z (tripping rule I B : Operational current of electrical circuit I n : Rated current of selected protective device I z : Permissible current carrying capacity of the cable or line under specified operating conditions I : Tripping current of the protective device under specified operating conditions (conventional test current. These days, the factor 1.5 has become an internationally accepted compromise of the protection and utilization ratio of a line, taking into account the breaking behavior of the protective device (e.g. fuse. In compliance with the supplementary requirements for DIN VDE 3, Siemens fuse links of gg operational class comply with the following conditions: Load breaking switching with I =1.5 I n during conventional test duration under special test conditions in accordance with the aforementioned supplementary requirements of DIN VDE 3. This therefore permits direct assignment. 3/38 Siemens ET B1 AO 9, Characteristic curves for fuses

43 Siemens AG 9 Low-Voltage Fuse Systems Notes 3 Siemens ET B1 AO 9, Characteristic curves for fuses 3/39

44 Low-Voltage Fuse Systems Siemens AG 9 Notes 3 3/ Siemens ET B1 AO 9, Characteristic curves for fuses

45 Siemens AG 9 / Application information /3 SITOR, LV HRC design / SITOR, cylindrical fuse design /53 SILIZED, NEOZED and DIAZED design /5 Configuration Siemens ET B1 AO 9, Characteristic curves for fuses

46 Siemens AG 9 Application information Overview Characteristics SITOR fuse links protect converter equipment against short circuits. The power semiconductors used in these devices (diodes, thyristors, GTOs and others require high-speed elements for protection due to their low thermal capacity. SITOR fuse links (super quick fuse links for semiconductor protection are ideal for this type of application. The following types of short-circuit faults can occur: Internal short circuit: A faulty semiconductor device causes a short circuit within the power converter External short circuit: A fault in the load causes a short circuit on the output side of the power converter Shoot-throughs: In the event of a failure of the chassis converter control system during inverter operation (commutation failure, the converter connection forms a short-circuit type connection between the DC and AC power supply system. Fuse links can be arranged in a number of ways within the converter connection. A distinction is made between phase fuses in three-phase current incoming feeders and, if applicable, DC fuses and arm fuses in the arms of the converter connections (see adjacent graphs. In the case of center tap connections, fuse links can only be arranged as phase fuses in three-phase current incoming feeders. When using SITOR fuse links of operational class ar, the overload protection of converter equipment, up to approx. 3.5 times the rated current of the fuse link, is taken from conventional protective devices (for example, thermal-delayed overload relays or, in the case of controlled power converters, from the current limiter (exception: full range fuses. As semiconductor protection, SITOR fuse links of the 3NE1...- series with gs operational class are also suitable for the overload and short-circuit protection of cables, lines and busbars. All other dual-function fuses of the SITOR series have a gr characteristic. Overload protection is ensured as long as the rated current of the SITOR fuse links of the series 3NE1...- is selected as I n I z (DIN VDE 1 Part 3. The rules of DIN VDE 1 Part 3 must be applied when rating short-circuit protection for cables, lines and busbars. Configuration options Six-pulse bridge circuit B with phase fuses Six-pulse bridge circuit B with phase fuses and DC fuse (switching for converter ( ( Six-pulse bridge circuit B with arm fuses (reversible connection I_1893 I_1895 I_189 ( ( Six-pulse bridge circuit B with phase fuses and DC fuse (reversible connection Six-pulse bridge circuit B with arm fuses I_1897 I_189 Three-phase bidirectional connection W3 with pase fuses with arm fuses I_1898 / Siemens ET B1 AO 9, Characteristic curves for fuses