On-load tap-changer VACUTAP VRC and VRE

Transcription

1 On-load tap-changer VACUTAP VRC and VRE Technical Data TD 246/03

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3 Table of Contents Table of Contents 1 General / Technical data On-load tap-changer designations Summary of the technical data Step capacity diagram Step capacity diagram EAF/LF operation Rated insulation level Rated withstand voltages Rated withstand voltages of the internal insulation VR-rated withstand voltages - multiple coarse change-over selector Special designs Parallel jumpers for parallel connections On-load tap-changer combination VACUTAP VRC I/VRC II for delta connection On-load tap-changer VACUTAP VRC III 700 Y und VRC I 701/1001/1301 with multiple coarse change-over selector (up to max. of 5 coarse taps) Appendix Dimension drawings / connection diagrams Installation drawings NOTE These technical data are intended for the calculator and designer of the transformer. These type-specific data are only valid in connection with the information contained in the general section (TD 61) since this section contains important information on such subjects as potential connection of the tap winding, leakage inductance, current division, and so on. Changes may have been made to a product after going to press with this documentation. We expressly reserve the right to make changes to a product s technical data and design as well as changes to the scope of delivery. In all cases, the information submitted and agreements concluded during processing of the quotation and order in question shall be binding. Since the on-load tap-changer is delivered to the specifications of the transformer manufacturer, the transformer manufacturer is responsible for selecting the correct properties of the on-load tap-changer so that the requirements of the transformer are met. TD 246/03 3

4 1 General / Technical Data 1 General / Technical Data 1.1 On-load tap-changer designations Type Number of phases I um (in A) Number of configured sectors Applications U m (in kv) Tap selector size Number of max. operating positions without changeover selector Number of max. operating positions with change-over selector Mid-positions Change-over selector Tie-in measures VACUTAP VRC VACUTAP VRE 1 phase 2 phases 3 phases Example Exsample VRC III 700 Y - 72,5 / C W R VRC VRE I II III 400 VRC VRC 550 VRC,VRE 700 VRC,VRE 1000 VRC,VRE sector 1 2 sectors 2 3 sectors 3 3 sectors (Y) 0 For neutral connection only VRC,VRE VRC,VRE VRC,VRE VRC,VRE VRC,VRE VRC;VRE VRC;VRE VRC;VRE VRC;VRE Contacts mid-positions (without changeoverselector) 1 mid-position 3 mid-positions reversing change-over selector coarse change-over selector tie-in resistor potential switch potential switch with tie-in resistor Y B C D DE W G R S P - / - Basic connection diagram 4 TD 246/03

5 1 General / Technical Data 1.2 Summary of the technical data On-load tap-changer VRC III 400 Y VRC III 550 Y VRC III 700 Y VRC II 402 VRC II 552 VRC II 702 VRC I 401 VRC I 551 VRC I 701 VRC I 1001 VRC I 1301 VRE III 700 Y VRE I 701 VRE I 1001 VRE I 1301 No. of phases and application 3 1) 3 1) 3 1) ) Max. rated through-current I um (in A) Rated short-time withstand current (in ka) Rated short-circuit duration (in s) Rated peak withstand current (in ka) Max. rated step voltage U im (in V) 2) Step capacity (P StN ) (in kva) Rated frequency (in Hz) Operating positions Without change-over selector: max. of 18 3) With change-over selector: max. of 35 3) Note: 1) Neutral point 2) The maximum rated step voltage may be exceeded by 10 % due to overexcitation of the transformer if the step capacity is limited to its rated value. 3) For more operating positions, see section 2 Special designs. Oil compartment: Pressure-tight up to 0.3 bar permanent differential pressure (test pressure 0.6 bar), head and cover of the diverter switch oil compartment are vacuum-proof. Temperature The on-load tap-changer VACUTAP VR can be operated in the rated load range at temperatures of the range: surrounding oil between -25 and C and with overload up to 115 C according to IEC Dimensions: Weight, displacement volume, oil content of the diverter switch oil compartment are shown in the relevant dimension drawings. TD 246/03 5

6 1 General / Technical Data Step capacity diagram 1) kva Rated step voltage U i (V) VRC III 400Y VRC II 402'''' VRC I 401''' VRC III 550Y VRC II 552'''' VRC I 551''' 1500 kva VRE III 700Y VRE I 701 VRC III 700Y VRC II 702'''' VRC I 701''' VRE I 1001 VRC I 1001 VRE I 1301 VRC I Rated through-current I u (A) Fig. 1 Step capacities (rated step voltage U i, rated through-current I u ). Note: 1) When used for electrical arc furnace (EAF) and ladle furnace transformers (LF), refer to step capacity diagram chapter Step capacity diagram EAF/LF operation 2) kva 3500 Rated step voltage U i (V) VRC III 400Y VRC II 402'''' VRC I 401''' VRC III 550Y VRC II 552'''' VRC I 551''' VRC III 700Y VRC II 702'''' VRC I 701''' VRE I 701 VRE III 700Y 1750 kva VRE I kva VRC I kva VRE I 1301 VRC I Rated through-current I u (A) Fig. 2 Step capacities electrical arc furnace and ladle furnace operation (EAF/LF), rated step voltage U i, rated through-current I u. Note: 2) Please contact MR. 6 TD 246/03

7 1 General / Technical Data 1.3 Rated insulation level Rated insulation level On-load tap-changer 72.5 to 300 kv VRC I 401/551/701; VRC I 1001; VRC I 1301; VRC II 402/552/702; VRE I 701; VRE I 1001; VRE I to 245 kv VRC III 400/550/700 Y; VRE III 700 Y Highest voltage for equipment U m (in kv) 1) Rated lightning impulse with stand voltage (in kv, 1.2/50 μs) Rated switching impulse withstand voltage (in kv) Rated short-duration power frequency withstand voltage (in kv, 50 Hz, 1 min.) Note: 1) According to IEC , chapter 3.57: highest r.m.s. phase-to-phase voltage in a three-phase system for which a on-load tap-changer is designed with respect to its insulation. TD 246/03 7

8 1 General / Technical Data 1.4 Rated withstand voltages Rated withstand voltages of the internal insulation Fig. 2 shows diagrams of the voltage stress present on the tap winding of the three primary basic connections of three-pole on-load tap-changers and single-pole on-load tap-changers. When selecting the on-load tap-changer, a check must be made to determine whether the highest stress on the tap selector does not exceed the related rated withstand voltages. Without change-over selector With reversing change-over selector With coarse change-over selector in (+) position With coarse change-over selector in ( ) position CAUTION E Adhere to maximum rated lightning impulse withstand a0 = Between selected and preselected tapping on the diverter switch and tap selector voltage stress on a0 in mid-position. a1 = Between tap selector contacts of the winding of one tap position (connected or not connected) a = Between beginning and end of a tapped winding and also with coarse winding, between beginning and end of a coarse winding. Note for coarse tapping arrangement in (-) - position of the change-over selector: When stressed with impulse voltage, the permissible withstand voltage a must be adhered to between the end of a coarse tap winding connected with the K tap selector contact and the tap selector contact at the end of the tapped winding of the same phase b = Between the tap selector contacts of different phases and between change-over selector contacts of different phases, which are connected with the beginning/end of a tapped winding or with a tap selector contact f = Between diverter switch terminal and ground Additional for coarse tapping arrangement in (+) - position of the change-over selector: c1 = From one (-) - change-over selector contact to terminal of the same phase c2 = Between (-) - change-over selector contacts of different phases Fig. 2 Rated withstand voltages 8 TD 246/03

9 1 General / Technical Data Insulation Tap selector size B Tap selector size C Tap selector size D Tap selector size DE distances kv kv kv kv kv kv kv kv 1.2/50 μs 50 Hz 1.2/50 μs 50 Hz 1.2/50 μs 50 Hz 1.2/50 μs 50 Hz 1 min. 1 min. 1 min. 1 min. a0 Power frequency withstand voltage test (50 Hz/60 s): 20 kv 50 Hz 1 min; Response voltage at 1mA-leakage current: 44 kv 1.2/50 μs; 3 ka-residual voltage (= lightning impulse protection level): 70 kv 1.2/50 μs with ZnO On-load tap-changer VRC III 400 Y... VRE I 1301, rated withstand voltages of the interal on-load tap-changer insulation Note: a a b 1) c c 2 1) ) Insulation distance omitted for single-pole on-load tap-changers The admissible maximum operating voltage on the individual tap selector distances complies to half the value of the above mentioned rated short-duration power frequency withstand voltages. Without change-over selector With reversing change-over selector With coarse change-over selector Connection Tap selector size Connection Tap selector size Connection Tap selector size B/C/D/DE 10071W B/C/D/DE 10071G B/C/D/DE B/C/D/DE 10081W B/C/D/DE 10081G B/C/D/DE B/C/D/DE 10091W B/C/D/DE 10091G B/C/D/DE B/C/D/DE 12101W B/C/D/DE 12101G B/C/D/DE B/C/D/DE 12111W B/C 12111G B/C B/C/D/DE 14111W D/DE 14111G D/DE B/C/D/DE 14121W B/C 14121G B/C B/C/D/DE 14131W B/C 14131G B/C B/C/D/DE 16121W D/DE 16121G D/DE B/C/D/DE 16131W D/DE 16131G D/DE B/C/D/DE 16141W B/C/D/DE 16141G B/C/D/DE B/C/D/DE 16151W B/C 16151G B/C B/C/D/DE 18151W D/DE 18151G D/DE B/C/D/DE 18161W B/C 18161G B/C B/C/D/DE 18171W B/C 18171G B/C B/C/D/DE 10191W B/C/D/DE 10191G B/C/D/DE B/C 12231W B/C/D/DE 12231G B/C/D/DE B/C 14271W B/C/D/DE 14271G B/C/D/DE 16311W B/C/D/DE 16311G B/C/D/DE 18351W B/C/D/DE 18351G B/C/D/DE Available connections (also available as 3 W, 3 G) TD 246/03 9

10 1 General / Technical Data VR-rated withstand voltages - multiple coarse change-over selector E a0 = Between selected and preselected tapping on the diverter switch and tap selector a1 = Between tap selector contacts of the winding of a tap position (connected or not connected) a = Between beginning and end of a tapped winding and also between the connected K contact and any points of the tapped winding of the same phase b = Between the tap selector contacts of different phases and between the connected K contact of one phase and any points of the tapped winding of another phase c1 = Between any coarse tappings of one phase to the diverter switch terminal of the same phase c2 = Between identically-named, unconnected coarse tappings of different phases d1 = Between connected and adjacent coarse tap contacts in one phase. d2 = Between unconnected, adjacent coarse tap contacts in one phase d3 = Between beginning and end of all coarse taps of one phase f = Between diverter switch terminal and ground Insulation Tap selector size B Tap selector size C distances a 0 kv kv kv kv 1.2/50 μs 50 Hz 1.2/50 μs 50 Hz 1 min. 1 min. Power frequency withstand voltage test (50 Hz/60 s): 20 kv 50 Hz 1 min; Response voltage at 1 ma-leakage current: 44 kv 1.2/50 μs; 3 ka-residual voltage (= lightning impulse protection level): 70 kv 1.2/50 μs with ZnO a a b 1) c c2 1) d d d On-load tap-changer VACUTAP VRC with multiple coarse change-over selector, rated withstand voltages of the internal on-load tap-changer insulation Note: 1) Insulation distance omitted for single-pole on-load tap-changers The admissible maximum operating voltage on the individual tap selector distances complies to half the value of the above mentioned rated short-duration power frequency withstand voltages. 10 TD 246/03

11 2 Special designs 2 Special designs 2.1 Parallel jumpers for parallel connections Current division on the connection terminals of 2 tap selector planes only for on-load tap-changers VACUTAP VR I 1001 and of 3 tap selector planes only for on-load tap-changers VACUTAP VR I 1301, see appenidix, drawing Parallel jumpers on the tap selector terminals are then mandatory when the tap winding was wound in two or more branches and each of these branch taps is connected to the terminals of the tap selector. This measure reliably prevents the following. a) Introduction of circulating currents into the current paths of tap selector and diverter switch b) Arcing on movable tap selector contact bridges due to commutation c) Overvoltage between adjacent tap selector terminals connected in parallel 2.2 On-load tap-changer combination VACUTAP VRC I/VRC II for delta connection The VRC II 402 on-load tap-changer can also be used with the single-phase on-load tap-changer VRC I 401 as a two-column on-load tap-changer combination VRC I 401/VRC II 402 for adjusting the voltage of transformer windings in a delta connection (similar to VRC I 551 / VRC II 552 and VRC I 701 / VRC II 702). The tap windings should correspond to those in fig. 3. Fig. 3 On-load tap-changer combination VRC I 401 / VRC II 402 (a VRC I 401, b VRC II 402) for delta connection. KHW On-load tap-changer VACUTAP VRC III 700 Y and VRC I 701/1001/1301 with multiple coarse change-over selector (up to max. of 5 coarse taps) Extremely fine voltage adjustment requires a great number of operating positions which sometimes may only be implemented with a multiple coarse tapping arrangement. For instance, 107 operating positions can be obtained by using a coarse 5-tap winding and a tapped winding with 18 tappings. The multiple coarse change-over selector is attached to both sides of the tap selector. The on-load tap-changers are available (on request) for U m = 72.5 up to max. 300 kv and for 2 to 5 coarse taps (tap selector sizes B and C) or 2 and 3 coarse taps (tap selector size D). TD 246/03 11

12 3 Appendix 3 Appendix 3.1 Dimension drawings / connection diagrams On-load tap-changer VACUTAP VRC, VRE, survey of types _1-4 Page On-load tap-changer VACUTAP VR, basic connection diagrams, designation of tap selector terminal contacts according to MR standard _1/2 Page 18/19 On-load tap-changer VACUTAP VRC III 400/550/700 Y, connection diagram 10191W Page 20 On-load tap-changer VACUTAP VRE III 700 Y, connection diagram 10193W Page 21 On-load tap-changer VACUTAP VRC III 400/550/700 Y - 0/W/G, dimension drawing Page 22 On-load tap-changer VACUTAP VRE III 700 Y - 0/W/G, dimension drawing Page 23 On-load tap-changer VACUTAP VRC II 402/552/702-0/W/G, dimension drawing Page 24 On-load tap-changer VACUTAP VRC I 401/551/701-0/W/G, dimension drawing Page 25 On-load tap-changer VACUTAP VRE I 701-0/W/G, dimension drawing Page 26 On-load tap-changer VACUTAP VRC I /W/G, dimension drawing Page 27 On-load tap-changer VACUTAP VRE I /W/G, dimension drawing Page 28 On-load tap-changer VACUTAP VRC I /W/G, dimension drawing Page 29 On-load tap-changer VACUTAP VRE I /W/G, dimension drawing Page 30 On-load tap-changer VACUTAP VRC/VRE connecting leads 3W, 1G, 3G, dimension drawing Page 31 On-load tap-changer VACUTAP VRC III 700 Y, with multiple coarse change-over selector, dimension drawing Page 32 On-load tap-changer VACUTAP VRC I 701, with multiple coarse change-over selector, dimension drawing Page 33 On-load tap-changer VACUTAP VRC I 1001, with multiple coarse change-over selector, dimension drawing Page 34 On-load tap-changer VACUTAP VRC I 1301, with multiple coarse change-over selector, dimension drawing Page TD 246/03

13 3 Appendix 3.2 Installation drawings On-load tap-changer VACUTAP VRC und VRE, installation drawing _1/2 Page 36/37 On-load tap-changer VACUTAP VR, on-load tap-changer head Page 38 On-load tap-changer VACUTAP VR, on-load tap-changer head with flange for pressure-relief device Page 39 On-load tap-changer VACUTAP VR, special design for bell-type tank Page 40 On-load tap-changer VACUTAP VRC und VRE, contact arrangement on the tap selector, no. of contacts per plane Seite 41 On-load tap-changer VACUTAP VRC I 1001/1301, VRE I 1001/1301, jumpers for the parallel connection of tap selector terminals Page 42 On-load tap-changer VACUTAP VR, installation position of tap selector terminals Page 43 On-load tap-changer VACUTAP VRC III 400/550/700 Y, VRE III 700 Y, arrangement of tap selector terminals Seite 44 On-load tap-changer VACUTAP VRC I 401/551/701, VRE I 701, arrangement of tap selector terminals Page 45 On-load tap-changer VACUTAP VRC I 1001, VRE I 1001, arrangement of tap selector terminals Page 46 On-load tap-changer VACUTAP VRC I 1301, VRE I 1301, arrangement of tap selector terminals Seite 47 On-load tap-changer VACUTAP VR, versions of the on-load tap-changer head, swivelling range and drive direction of the gear unit Page 48 On-load tap-changer VACUTAP VR, versions of the on-load tap-changer head, swivelling range and drive direction of the gear unit Seite 49 On-load tap-changer VACUTAP VR, horizontal drive shaft Seite 50 On-load tap-changer VACUTAP VRC and VRE, design: VRC III, VRE III, tie-in resistors with or without potential switch Seite 51 On-load tap-changer VACUTAP VRC, design: VRC II, tie-in resistors with or without potential switch Page 52 On-load tap-changer VACUTAP VRC and VRE, design: VRC I, VRE I, tie-in resistors with or without potential switch Page 53 On-load tap-changer VACUTAP VRC and VRE, tie-in resistor cylinder with potential switch without tie-in resistors Page 54 TD 246/03 13

14 E_1 On-load tap-changer VACUTAP VRC, VRE Survey of types 14 TD 246/03

15 E_2 On-load tap-changer VACUTAP VRC, VRE Survey of types TD 246/03 15

16 E_3 On-load tap-changer VACUTAP VRC, VRE Survey of types 16 TD 246/03

17 E_4 On-load tap-changer VACUTAP VRC, VRE Survey of types TD 246/03 17

18 E_1 On-load tap-changer VACUTAP VR Basic connection diagrams Designation of tap selector terminal contacts according to MR standard 18 TD 246/03

19 E_2 On-load tap-changer VACUTAP VR Basic connection diagrams Designation of tap selector terminal contacts according to MR standard TD 246/03 19

20 On-load tap-changer VACUTAP VRC III 400/550/700 Y-10191W Connection diagram 20 TD 246/03

21 On-load tap-changer VACUTAP VRE III 700 Y-10193W Connection diagram TD 246/03 21

22 E On-load tap-changer VACUTAP VRC III 400/550/700 Y 0/W/G Dimension drawing 22 TD 246/03

23 E On-load tap-changer VACUTAP VRE III 700 Y 0/W/G Dimension drawing TD 246/03 23

24 E On-load tap-changer VACUTAP VRC II 402/552/702 0/W/G Dimension drawing 24 TD 246/03

25 E On-load tap-changer VACUTAP VRC I 401/551/701 0/W/G Dimension drawing TD 246/03 25

26 E On-load tap-changer VACUTAP VRE I 701 0/W/G Dimension drawing 26 TD 246/03

27 E On-load tap-changer VACUTAP VRC I /W/G Dimension drawing TD 246/03 27

28 E On-load tap-changer VACUTAP VRE I /W/G Dimension drawing 28 TD 246/03

29 E On-load tap-changer VACUTAP VRC I /W/G Dimension drawing TD 246/03 29

30 E On-load tap-changer VACUTAP VRE I /W/G Dimension drawing 30 TD 246/03

31 E On-load tap-changer VACUTAP VRC/VRE Connecting leads 3W, 1G, 3G Dimension drawing TD 246/03 31

32 E On-load tap-changer VACUTAP VRC III 700 Y with multiple coarse change-over selector Dimension drawing 32 TD 246/03

33 E On-load tap-changer VACUTAP VRC I 701 with multiple coarse change-over selector Dimension drawing TD 246/03 33

34 E On-load tap-changer VACUTAP VRC I 1001 with multiple coarse change-over selector Dimension drawing 34 TD 246/03

35 E On-load tap-changer VACUTAP VRC I 1301 with multiple coarse change-over selector Dimension drawing TD 246/03 35

36 E_1 On-load tap-changer VACUTAP VRC and VRE Installation drawing 36 TD 246/03

37 E_2 On-load tap-changer VACUTAP VRC and VRE Installation drawing TD 246/03 37

38 E On-load tap-changer VACUTAP VR On-load tap-changer head 38 TD 246/03

39 E On-load tap-changer VACUTAP VR On-load tap-changer head with flange for pressure-relief device TD 246/03 39

40 E On-load tap-changer VACUTAP VR Special design for bell-type tank 40 TD 246/03

41 E On-load tap-changer VACUTAP VRC and VRE Contact arrangement on the tap selector No. of contacts per plane TD 246/03 41

42 E On-load tap-changer VACUTAP VRC I 1001/1301 VRE I 1001/1301 Jumpers for the parallel connection of tap selector terminals 42 TD 246/03

43 E On-load tap-changer VACUTAP VR Installation position of tap selector terminals TD 246/03 43

44 E On-load tap-changer VACUTAP VRC III 400/550/700 Y VRE III 700 Y Arrangement of tap selector terminals 44 TD 246/03

45 E On-load tap-changer VACUTAP VRC I 401/551/701 VRE I 701 Arrangement of tap selector terminals TD 246/03 45

46 E On-load tap-changer VACUTAP VRC I 1001 VRE I 1001 Arrangement of tap selector terminals 46 TD 246/03

47 E On-load tap-changer VACUTAP VRC I 1301 VRE I 1301 Arrangement of tap selector terminals TD 246/03 47

48 E On-load tap-changer VACUTAP VR Versions of the on-load tap-changer head Swivelling range and drive direction of the gear unit 48 TD 246/03

49 E On-load tap-changer VACUTAP VR Versions of the on-load tap-changer head Swivelling range and drive direction of the gear unit TD 246/03 49

50 E On-load tap-changer VACUTAP VR Horizontal drive shaft 50 TD 246/03

51 E On-load tap-changer VACUTAP VRC and VRE Design: VRC III, VRE III Tie-in resistors with or without potential switch TD 246/03 51

52 E On-load tap-changer VACUTAP VRC Design: VRC II Tie-in resistors with or without potential switch 52 TD 246/03

53 E On-load tap-changer VACUTAP VRC and VRE Design: VRC I, VRE I Tie-in resistors with or without potential switch TD 246/03 53

54 E On-load tap-changer VACUTAP VRC and VRE Tie-in resistor cylinder with potential switch without tie-in resistors 54 TD 246/03

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56 Maschinenfabrik Reinhausen GmbH Phone Falkensteinstrasse 8 Fax Regensburg, Germany sales@reinhausen.com TD 246/03 en 0208/500 F Printed in Germany