Drive System Application

Transcription

1 Drive System Application Controlling the main contactor by using free function blocks for MICROMASTER 4, SINAMICS G120 & SINAMICS G120D Application description for MICROMASTER 4, SINAMICS G120 and SINAMICS G120D

2 Warranty, liability and support Note The Application Examples are not binding and do not claim to be complete regarding the circuits shown, equipping and any eventuality. The Application Examples do not represent customer-specific solutions. They are only intended to pro-vide support for typical applications. You are responsible in ensuring that the de-scribed products are correctly used. These Application Examples do not relieve you of the responsibility in safely and professionally using, installing, operating and servicing equipment. When using these Application Examples, you recognize that Siemens cannot be made liable for any damage/claims beyond the liability clause described. We reserve the right to make changes to these Application Examples at any time without prior notice. If there are any deviations between the recommendations provided in these Application Examples and other Siemens publications - e.g. Catalogs - then the contents of the other documents have priority. Version 1.4 Issue December /28

3 Warranty, liability and support Warranty, liability and support We do not accept any liability for the information contained in this document. Any claims against us - based on whatever legal reason - resulting from the use of the examples, information, programs, engineering and performance data etc., described in this Application Examples shall be excluded. Such an exclusion shall not apply in the case of mandatory liability, e.g. under the German Product Liability Act ( Produkthaftungsgesetz ), in case of intent, gross negligence, or injury of life, body or health, guarantee for the quality of a product, fraudulent concealment of a deficiency or breach of a condition which goes to the root of the contract ( wesentliche Vertragspflichten ). However, claims arising from a breach of a condition which goes to the root of the contract shall be limited to the foreseeable damage which is intrinsic to the contract, unless caused by intent or gross negligence or based on mandatory liability for injury of life, body or health The above provisions does not imply a change in the burden of proof to your detriment. Copyright 2008 Siemens A&D. It is not permissible to transfer or copy these Application Examples or excerpts of them without first having prior authorization from Siemens A&D in writing. If you have any recommendations relating to this document then please send them to us at the following address: mailto:sdsupport.aud@siemens.com Version 1.4 Issue December /28

4 Preposition Preposition Aim of the application A circuit is described in this application that allows the drive inverter itself to close the main contactor and automatically enable operation of the drive inverter. Scope Exclusion No additional control equipment is necessary in the form of external components that ensure the correct sequencing. This application does not provide a description of Basic commissioning of the drive inverter Commissioning higher-level controls It is assumed that the reader has basic knowledge of these subjects. The solution can be used for: MICROMASTER MM430 MICROMASTER MM440 SINAMICS G120 with Control Units CU240 SINAMICS G120D with Control Units CU240 The drive inverter must be supplied from an external 24V power supply: MICROMASTER 4 via MICROMASTER Profibus Module SINAMICS G120 via terminals 31 and 32 of the Control Unit SINAMICS G120D via the logical 24V supply (IN) of the Control Unit Reference to the Automation and Drives Service & Support This article is from the Internet Application Portal of the Automation and Drives Service & Support. You can go directly to the download page of this document using this link. Version 1.4 Issue December /28

5 Application description Table of Contents Table of Contents Table of Contents... 5 Application description Task solution Commissioning Main contactor CLOSE command Feedback signal from the main contactor ON command for the frequency inverter OFF command for the frequency inverter ON command for the main contactor Sequence of the power-on / power-off sequence for main contactor control Sequence of the power-on / power-off sequence for main contactor control for MICROMASTER 440/ Sequence of the power-on / power-off sequence for main contactor control for SINAMICS G120 and SINAMICS G120D Parameter settings: Connection of the terminals Connection of the free blocks Executing scripts in STARTER Appendix and references Further notes, tips and tricks Influence of high-frequency load currents on the main current path of the contactor Selection table for main contactors Internet link data History Version 1.4 Issue December /28

6 Application description Task solution Application description Contents MICROMASTER 4, SINAMICS G120 and SINAMICS G120D drive inverters are designed to be directly connected to the line supply - i.e. a main contactor is not required. However, for several applications main or input contactors are required. A circuit is described in this application that offers the drive inverter the following possibilities: The drive inverter itself can close the main contactor Operation of the drive inverter is automatically enabled 1 Task solution The circuit is implemented using free function blocks (FFBs). This means that there is no additional control expenditure in the form of external components - that would be necessary in order to ensure the correct sequencing. Correct operation requires an external 24V DC power supply for the drive inverter: MICROMASTER 4 via MICROMASTER Profibus Module SINAMICS G120 via terminals 31 and 32 of the Control Unit SINAMICS G120D via the logical 24V supply (IN) of the Control Unit This solution can be used for: MICROMASTER MM430 MICROMASTER MM440 SINAMICS G120 with Control Units CU240 SINAMICS G120D with Control Units CU240 Version 1.4 Issue December /28

7 Application description Task solution Figure 1-1 System overview, main contactor ON / OFF Note: Please ensure that all of the contactors in the electrical cabinet are equipped with noise suppression devices. AC contactors are equipped with RC suppression devices. DC contactors are equipped with free-wheeling diodes. Version 1.4 Issue December /28

8 Application description Commissioning 2 Commissioning 2.1 Main contactor CLOSE command The main contactor (CLOSE command) can be controlled from any command source. The user defines the command source (set P0700). Possible command sources for MM4: BOP (keypad) Digital input, e.g. DI1 USS at the BOP link USS at the COM link PROFIBUS Possible command sources for SINAMICS G120 and SINAMICS G120D: BOP (keypad) Digital input, e.g. DI0 PROFINET USS at the BOP link USS at the COM link PROFIBUS From the selected command source, the user activates the independent contactor closing. In so doing, flip-flop RS-FF1 is set. The RS-FF1 output signal energizes the main contactor via the main contactor relay. For MM4 this is via the digital output DO1 and for the frequency inverters G120 and G120D via DO0. Version 1.4 Issue December /28

9 Application description Commissioning 2.2 Feedback signal from the main contactor The power-on operation must be monitored in order to avoid a possible fault message from the drive inverter caused by the contactor (~ ms switching delay). There are two versions of this monitoring function that will now be described in the following. The circuits are implemented using free function blocks (FFBs). Version a) Feedback signal contact The "ON signal" is evaluated using the feedback signal contact of the main contactor that is connected to digital input DI2 for MM4 / DI1 for G120 and G120D > P2812[1] = (set P0702 = 99 BiCo). Version b) DC link voltage comparison By comparing the DC link voltage with a specific value the drive inverter is only powered-up if the drive unit has been pre-charged (Fig. 2-1). This prevents the drive unit from being prematurely enabled - that would result in a fault trip. In the example, the numerical value for the DC link voltage comparator P2889 is for a drive inverter with an input voltage of 3-ph. 400 V AC. For other line supply conditions, parameter P2889 must be adapted as follows depending on the reference voltage P2001: 230 V, 1 AC~: P2889 = ~ 28 % of P2001 = 1000 V 400 V, 3 AC ~: P2889 = ~ 48 % of P2001 = 1000 V 500 V, 3 AC~: P2889 = ~ 60 % of P2001 = 1000 V Figure 2-1 Comparison of the DC link voltage - main contactor control Depending on this comparator element or the feedback signal contact the inverter is enabled or the ON/OFF1 command is enabled. Version 1.4 Issue December /28

10 Application description Commissioning 2.3 ON command for the frequency inverter The frequency inverter is started if the main contactor has been closed via DO1/DO0 and the feedback signal from the main contactor has been received. 2.4 OFF command for the frequency inverter When powering-down (OFF), the inverse sequence applies. When the OFF command is issued (command source = 0), the frequency inverter is ramped-down to standstill (zero speed); the main contactor is then opened. 2.5 ON command for the main contactor The status signal "Operation" r0052 bit02 for MM440 and "Ready for operation" r0052 bit01 for G120 and G120D are delayed by timer 1 and resets flip-flop RS- FF1. The RS-FF1 output signal opens the main contactor via the main contactor relay. For MM4 frequency inverters this is via digital output DO1 and for G120 and G120D via DO0. Instead of the status signals r0052 bit02 for MM4 and r0052 bit01 for G120 and G120D, the status signal "f_act > P2167 (f_off)" r0053 bit01 can be used together with the setting "Shutdown frequency f_off" P2167 = 0 Hz for all frequency inverters. Version 1.4 Issue December /28

11 Application description Commissioning 2.6 Sequence of the power-on / power-off sequence for main contactor control Sequence of the power-on / power-off sequence for main contactor control for MICROMASTER 440/430 ON/OFF1 via: BOP, DI1, USS or PROFIBUS 1 0 t Main contactor ON/OFF: DO1 1 0 t ON/OFF1 Cont.Wrd.1 r Drive running r or f_act > 2167 (f_off) r with P2167 = 0 Hz RFG active Ramp-up along RFG t t 0 Ramp-down along RFG t Figure 2-2 Sequence of the power-on / power-off sequence for main contactor control for MICROMASTER 440/430 Version 1.4 Issue December /28

12 Application description Commissioning Sequence of the power-on / power-off sequence for main contactor control for SINAMICS G120 and SINAMICS G120D Figure 2-3 Sequence of the power-on / power-off sequence for main contactor control for SINAMICS G120 and SINAMICS G120D Version 1.4 Issue December /28

13 Application description Commissioning 2.7 Parameter settings: Table 2-1 Parameter settings Parameter No. Designation Parameter value Note / comments P0700[0] Selection of command source? * Select the source for the ON command for the main contactor: 1: BOP (keypad) 2: Terminal 4: USS on BOP link 5: USS on COM link 6: PROFIBUS or PROFINET (only for CU240S/D PN/PN-F) P0701[0] P0702[0] P0922 P0731[0] MM4: Digital input 1 (DI1) CU240: Digital input 0 (DI0) MM4: Digital input 2 (DI2) CU240: Digital input 1 (DI1) Selection of PROFIdrive Standard Telegram MM4: Digital output 1 (DO1) CU240: Digital output 0 (DO0) 99 Enable BICO parameterization, only if P0700 = 2 99 Enable BICO parameterization, only if the feedback from the feedback contact of the main contactor is selected 999 Free BICO connection, only for CU240 r MM4: DO1 = RS-FF1 output CU240 DO0 = RS-FF1 output P0840[0] BI: ON/OFF 1 r Enable ON/OFF1 = Output AND 3 P0852[0] BI: Pulse enable r Pulse enable = output AND 2 P1000[0] Selection of frequency setpoint? Set frequency setpoint: 1: MOP setpoint 2: Analog setpoint 3: Fixed frequency 4: USS on BOP link 5: USS on COM link 6: CB on COM link *? = Plant dependent, not relevant Version 1.4 Issue December /28

14 Application description Commissioning Parameter No. Designation Parameter value Note / comments P2150[0] Hysteresis, f1 threshold 0.5 Hz Hysteresis, f1 threshold P2155[0] f1 threshold 1 Hz Frequency threshold 1 P2800 Enable FFB 1 1 = FFB enabled P2801[0] Activate AND = AND 1 at level 1 P2801[1] Activate AND = AND 2 at level 1 P2801[2] Activate AND = AND 3 at level 1 P2801[14] Activate RS-FF 1 1 RS-FF 1 at level 1 P2802[0] Activate timer = timer 1 at level 1 P2802[12] Activate CMP = CMP 1 at level 1 P2810[0] BI: AND 1 index 0 r AND 1 index 0 = Output timer 1 P2810[1] BI: AND 1 index 1 r AND 1 index 0 = r fact <= P2155 P2812[0] BI: AND 2 index 0 r AND 2 index 0 = Output RS-FF1 P2812[1] BI: AND 2 index 1 r or r AND 2 index 1 = DI2 (MM4) / DI1 (CU240) if feedback signal contact is selected or Output CMP 1 if DC link voltage comparison is selected. P2814[0] BI: AND 3 index 0 r AND 3 index 0 = Output AND 2 P2814[1] BI: AND 3 index 1 r or r or r or r or r or r AND 3 index 1 = r0019.0: BOP r0722.0: DI1 (MM4) / DI0 (CU240) r2032.0: USS on BOP link r2036.0: USS on COM link r2090.0: PROFIBUS r8890.0: PROFINET (only for CU240S/D PN/PN-F) Version 1.4 Issue December /28

15 Application description Commissioning Parameter No. Designation Parameter value Note / comments P2840[0] BI: RS-FF1 index 0 r or r or r or r or r or r RS-FF1 index 0 = r0019.0: BOP r0722.0: DI1 (MM4) / DI0 (CU240) r2032.0: USS on BOP link r2036.0: USS on COM link r2090.0: PROFIBUS r8890.0: PROFINET (only for CU240S/D PN/PN-F) P2840[1] BI: RS-FF1 index 1 r RS-FF1 index 1 = Output AND 1 P2849 BI : Timer 1 MM4: r or r P2167 = 0 Hz CU240: r or r P2167 = 0 Hz MM4: Status word 1: Drive running or Status word 2: f_act > P2167 (f_off) + Switch-off frequency f_off P2167 = 0 Hz CU240: Status word 1: Drive ready to run or Status word 2: f_act > P2167 (f_off) + Switch-off frequency f_off P2167 = 0 Hz P2850 Delay of timer s Delay time = 0.5 seconds P2851 Timer mode 2 Power-on/power-off delay P2885[0] BI: CMP 1 index 0 MM4: r0026 CU240: r CMP 1 index 0 = Absolute value V DC link P2885[1] BI: CMP 1 index 1 P2889 CMP 1 index 1 = Fixed connector 1 P2889 Fixed connector 1 48 % Fixed connector 1 = % of P2001 reference voltage: 230 V, 1 AC: = ~ 28% 400 V, 3 AC: = ~ 48% 500 V, 3 AC: = ~ 60% Version 1.4 Issue December /28

16 Application description Commissioning 2.8 Connection of the terminals MICROMASTER 430/440 Connection of the free blocks 1) L1 L2 L3 K1 24V external - + 1) This is the simplified representation of the logic configured in the frequency inverter. All of the interconnections between the free function blocks for MM430/MM440 are shown in Fig ) The ( ) terminal 2 of the power supply of the PROFIBUS module is at the same potential as the insulated 0V terminal 28 of the MM430/440. Main contactor ON via: BOP r Digital input DI1 r USS on BOP link r USS on COM link r PROFIBUS r Main contactor OFF via: Q R & Main contactor ON/OFF via DO1 r2841 ON command for drive P0731[0] r2841 L1 L2 L3 AC DC 3) Terminal 9 of the MM430/MM40 can be used for the power supply of digital inputs DI1 and DI2, if the max. current demand does not exceed 100 ma. MICROMASTER PROFIBUS Module St.Wrd.1 Bit02 r St.Wrd.2 Bit01 r Feedback from the main contactor: DI2 r Pre-charge finished r2886 OFF command for drive: BOP r Digital input DI1 r USS on BOP link r USS on COM link r PROFIBUS r & r2815 Drive ON/OFF P0840[0] r2815 DO1 +24V 0V 1 2 DI1 DI V 0V ) COM NO NC DC AC U V W 24V external 3) Main contactor ON via DI1 Feedback signal K1 to DI2 U V M 3~ W Figure 2-4 Controlling the main contactor for MICROMASTER 430/440 via DO1: connection of the terminals Version 1.4 Issue December /28

17 Application description Commissioning 4) This is the simplified representation of the logic configured in the frequency inverter. All of the interconnections of the free function blocks for SINAMICS G120 / SINAMICS G120D are shown in Fig ) 5) Terminal 9 of the CU240 Control Unit can be used for the power supply of the digital inputs DI0 and DI1, if the max. current demand does not exceed 100 ma. +24V 0V DI0 DI1 +24V 0V COM NO NC U V W L1 L2 L3 5) Figure 2-5 Controlling the main contactor for SINAMICS G120 via DO0: connection of the terminals Version 1.4 Issue December /28

18 Application description Commissioning L1 Control Unit CU240D... Main contactor ON via: BOP r Digital input DI0 r PROFINET r USS on BOP link r USS on COM link r PROFIBUS r Main contactor OFF via: St.Wrd.1 Bit01 r St.Wrd.2 Bit01 r Feedback from the main contactor: DI1 r Pre-charge finished r2886 Q R & OFF command for drive: BOP r Digital input DI0 r PROFINET r USS on BOP link r USS on COM link r PROFIBUS r Connection of the free blocks Main contactor ON/OFF via DO0 r2841 ON command for drive & r2815 P0731[0] r2841 P0840[0] r2815 SINAMICS G120D 7) Drive ON/OFF L2 L3 Power Module PM250D L1 L2 L3 HAN Q4/2 Line filter class A AC DC K V external switched - + 6) 6) The non-switched and switched 24 V supply are provided using appropriate external sources. The non-switched 24 V supply is designed to provided permanent power to the internal control electronics, the power module electronics, the digital inputs and the encoder input. The switched 24 V supply is provided to power only the digital outputs - these outputs are isolated from the rest of the drive electronics. This configuration allows the digital outputs to be switched on or off without disrupting the normal functioning of the Inverter. If it is not necessary to disconnect the 24 V supply then the switched as well as also the non-switched 24 V can be taken from the same supply (you can connect cable conductors "0 V switched" with "0 V non-switched" and "+24 V switched" with "+24 V non-switched" - refer to Fig. 2-7). 7) This is the simplified representation of the logic configured in the frequency inverter. All of the interconnections of free function blocks for SINAMICS G120 / SINAMICS G120D are shown in Fig DO0 DC AC DI0 DI DO /8" 16UN 24V 0V 24V 24V external (IN) 0V DI0 DI1 24V 0V M12 5 pole DI0, DI1 M12 5 pole DO0, DO1 DO1 0V DO0 U V W HAN Q8 Main contactor ON via DI0 Feedback signal K1 to DI1 M 3~ 6) 24V external non-switched + - Figure 2-6 Controlling the main contactor for SINAMICS G120 via DO0: connection of the terminals; 24 V supply using switched and non-switched external sources Version 1.4 Issue December /28

19 Application description Commissioning Control Unit CU240D... SINAMICS G120D L1 L2 L3 24V external non-switched - + 8) This is the simplified representation of the logic configured in the frequency inverter. All of the interconnections between free function blocks for SINAMICS G120 / SINAMICS G120D are shown in Fig Connection of the free blocks 8) K1 Main contactor ON via: BOP Digital input DI0 r r r r r PROFINET USS on BOP link USS on COM link PROFIBUS r Main contactor OFF via: St.Wrd.1 Bit01 r St.Wrd.2 Bit01 r Feedback from the main contactor: DI1 r Pre-charge finished r2886 Q R BOP Digital input DI0 & OFF command for drive: r r r r r PROFINET USS on BOP link USS on COM link PROFIBUS r Main contactor ON/OFF via DO0 r2841 ON command for drive & r2815 P0731[0] r2841 Drive ON/OFF P0840[0] r2815 Power Module PM250D HAN Q4/2 L1 L2 L Line filter class A AC DC DO0 DC AC DI0 DI1 DO /8" 16UN 24V external (IN) 24V 0V 24V 0V DI0 DI1 24V 0V M12 5 pole DI0, DI1 M12 5 pole DO0, DO1 DO1 0V DO0 U V W HAN Q8 Main contactor ON via DI0 Feedback signal K1 to DI1 M 3~ Figure 2-7 Controlling the main contactor for SINAMICS G120 via DO0: connection of the terminals; 24 V supply using only a non-switched external source Version 1.4 Issue December /28

20 Application description Commissioning 2.9 Connection of the free blocks 9) 9) A source should be selected for the CLOSE command of the main contactor, e.g. digital input DI1: P0700 = 2. 10) As ON command for the main contactor, either the status signal ZSW1 bit02 Operation or ZSW2 bit01 f_act > P2167 with P2167 = 0 Hz can be selected. 10) 11) Either the signal from the feedback signal contact of the main contactor can be used as feedback signal or the signal from the CMP1 "Pre-charging completed". 12) The frequency inverter is started if the main contactor has been closed via DO1 and the feedback signal has been received from the main contactor. 13) When powering-down, the inverse sequence applies. When the OFF command is issued (command source = 0) the frequency inverter ramps down to standstill (zero speed) and then the main contactor is opened. 11) 12) 13) Figure 2-8 Controlling the main contactor for MICROMASTER 430/440 via DO1: connection of the free blocks Version 1.4 Issue December /28

21 Application description Commissioning 14) 15) 14) A source should be selected for the CLOSE command of the main contactor, e.g. digital input DI0: P0700 = 2. 15) Either the status signal ZSW1 bit01 ready for operation or ZSW2 bit01 f_act > P2167 with P2167 = 0 Hz should be selected for the ON command. 16) Either the signal from the feedback signal contact of the main contactor or the signal from the CMP1 "Precharging completed" can be selected as feedback signal from the main contactor. 17) The frequency inverter is started if the main contactor has been closed via DO0 and the feedback signal has been received from the main contactor. 18) When powering-down the inverse sequence applies. When the OFF command is issued (command source = 0), the frequency inverter ramps down to standstill (zero speed) and then the main contactor is opened. 16) 17) 18) Figure 2-9 Controlling the main contactor for SINAMICS G120 and SINAMICS G120D via DO0: connection of the free blocks Version 1.4 Issue December /28

22 Application description Executing scripts in STARTER 3 Executing scripts in STARTER For fast parameter changes, you can use the attached script files (for CU240 and MM4). Note: Before you use the corresponding script, please set your drive inverter to the factory settings (P0010 = 30, P0970 = 1). The procedure in detail: 1. Save the attached script file in a folder on your computer hard drive. 2. Set-up a script folder for the drive in your STARTER project by clicking with the righthand mouse key on the drive; then click on "Expert" (lefthand mouse key) and on "Insert script folder". A new folder appears "SCRIPTS" at the lower end of the tree 3. Import the script from your folder into STARTER as described below: Using the righthand mouse key click on the tab "SCRIPTS"; Click on "ASCII import..." and open the required script file; Assign a name to the opened file and acknowledge with OK. Version 1.4 Issue December /28

23 Application description Executing scripts in STARTER 4. Execute the script by clicking with the righthand mouse key on the script and clicking "Accept and execute"; or open the script by double clicking on it and then pressing the button "Accept and execute". Also refer to Entry ID: Im ersten Fenster wählen Sie die Quelle für den EIN-Befehl für das Hauptschütz aus. Geben Sie eine Zahl von 1 bis 6 für CU240 oder 1, 2, 4, 5, 6 für MM4 ein (die möglichen Einstellungen sind auf der Abbildung 3-1 zu sehen) und drücken Sie auf den Button OK. CU240: MM4: Figure 3-1 Selecting the source for the main contactor CLOSE command 6. In the second window, select the source of the main setpoint. Enter a number of between 1 and 6 (the possible settings can be seen in Fig. 3-2) and press on the "OK" button. Figure 3-2 Selects the main setpoint source Version 1.4 Issue December /28

24 Application description Executing scripts in STARTER 7. In the third window, select the source of the feedback signal. Either enter 1 (feedback signal contact) or 2 (DC link voltage comparison) and press on the "OK" button. Figure 3-3 Selecting the source of the feedback signal 8. If you have selected the DC voltage comparison as feedback signal from the main contactor, then the next window opens in which you should select the line supply voltage. Enter a 1 (230V, 1 AC~), 2 (400V, 3 AC~) or 3 (500V, 3 AC~) and then press the "OK" button. Figure 3-4 Selecting the line supply voltage STARTER then writes all of the parameters required for parameterization into the frequency inverter. After the script has been run the following message is output "Script run completed". Version 1.4 Issue December /28

25 Appendix and references Further notes, tips and tricks Appendix and references 4 Further notes, tips and tricks When using contactors in front of drive inverters with a pulsed voltage, there are effects that can result in an increased temperature rise of the main contactor contacts or failure of the contactor operating mechanism (solenoid coil). We therefore generally recommend that the contactor should not be dimensioned according to AC1 (non-inductive or weak inductive load, resistance ovens). Practical engineering information for applications such as these is provided in the following. Influence of high-frequency load currents on the main current path of the contactor 19 Motor currents with a higher basic frequency (> 50/60 Hz) result in higher losses and therefore an increased temperature rise. The reason for this is the skin effect and the formation of eddy currents in electrically conductive materials. This additional temperature rise depends on the particular base frequency and the harmonic component of the current. As an additional factor, at the secondary side of drive inverters capacitive discharge currents can flow with respect to ground potential or through capacitor circuits when filters are used. These must also be taken into account when dimensioning the contactors. When switching capacitances (DC link capacitors or filters) the capability of the contactors in switching capacitors must also be taken into account. Frequency combinations must be geometrically added using their component of the particular frequency and the corresponding derating factor. As an alternative, a de-rating factor of 0.8 should be used selecting/dimensioning the contactor - this is a value gained from experience in the field. This safety factor should be multiplied by the derating factor for the base frequency according to the contactor characteristics. 19 Excerpt from the information sheet "Using switching devices in drive inverter systems" Version 1.4 Issue December /28

26 Appendix and references Further notes, tips and tricks Example A Size S6 contactor with frame-type terminals should be able to conduct the following current with a harmonic content (Table 135,51A). Table 4-1 Calculation example for Size S6 contactor Order No. of the harmonic (1 = basic fundamental) Per unit (PU) value of the current harmonic referred to the basic fundamental [%] rms values of the individual oscillations (as example, basic fundamental with 100A) [A] rms value of the total current (geom. addition) [A] Derating factor depending on the harmonic corresponding to diagram 1 for S6 Current of the particular harmonic multiplied with its associated derating factor [A] Reduced permissible rms value of this total current for the selected frame size (geom. addition) [A] Resulting derating factor for the max. rated. current of the selected frame size (in this example, S6) 1 50Hz 5 250Hz 7 350Hz Hz Hz Hz Irms= Irms= k derating ( 100) ) 2 (72,5) ( 52, 6 ) ( ) (7.. 2 ( 100) = ) 2 (52,6) ( 35, 5) ( 10,. 5) (4,3 118,97 A 135,51 A For this particular example, a 3RT (S6, 75 kw, 150 A rated current) is not sufficient as according to the calculation 150 A x results in A. The rms value of the total current in this example is A and is therefore above the calculated, permissible rated current of A. The 3RT (S6, 90 kw, 185 A rated current) has, for this application, a calculated, permissible rated current of 185 A x = A - and can therefore conduct a total current of A. In this application case the permissible operating current of the contactor is reduced to 87.8% (referred to the specified rated operating current)! Information and tables regarding the input currents and fuses for MICROMASTER 4 are provided in Catalog DA51.2, for SINAMICS G120 in Catalog D11.1 or in the Operating Instructions (Chapter, Technical data) of the particular drive inverter. Version 1.4 Issue December /28

27 Appendix and references Further notes, tips and tricks Selection table for main contactors Table 4-2 Rated current [A] Order number MLFB Rated load / voltage 8 3RT1015 3KW/400V 22 3RT1016 4KW/400V 40 3RT1025 7,5KW/400V 50 3RT KW/400V 60 3RT ,5KW/400V 100 3RT KW/400V 120 3RT KW/400V 140 3RT KW/400V 185 3RT KW/400V 215 3RT KW/400V 275 3RT KW/400V 330 3RT KW/400V 430 3RT KW/400V 610 3RT KW/400V Further information pleasefind at: Industrial Controls SIRIUS Version 1.4 Issue December /28

28 Appendix and references Further notes, tips and tricks 4.2 Internet link data This list is in no way complete and only reflects a selection of suitable references. Table History Subject area Title \1\ Catalogs [INTRANET] DA51.2, D11.1 \2\ Manual MM440 \3\ Manual MM430 \4\ Manual SINAMISC G120 \5\ Manual SINAMICS G120D \6\ FAQ How can I transfer projects from DriveMonitor into STARTER? \7\ FAQ Using the external 24 V power supply at the MICROMASTER 4 Profibus Module \8\ FAQ Cascading the 24 Volt power supply of the CU240D Table 4-4 History Version Datum Change V1 March 2003 First edition V1.1 November 2005 Design revised V1.2 September 2007 Text and figures revised, chapter "Further notes..." inserted. V1.3 February 2008 Text and figures revised, scripts written, chapter Executing scripts in STARTER inserted. 1.4 December 2010 Chapter new Version 1.4 Issue December /28