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    3RU11 Price and Stock

    Siemens 3RU1126-1CB0

    Electromechanical Relay SPST-NO/SPST-NC(45x96x97)mm DIN Rail Contactor Relay
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Onlinecomponents.com 3RU1126-1CB0 4
    • 1 $111.19
    • 10 $108.97
    • 100 $107.88
    • 1000 $107.88
    • 10000 $107.88
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    Master Electronics 3RU1126-1CB0 4
    • 1 $111.19
    • 10 $108.97
    • 100 $107.88
    • 1000 $107.88
    • 10000 $107.88
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    Siemens 3RU1146-4JB0ZOE

    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Onlinecomponents.com 3RU1146-4JB0ZOE
    • 1 $322.32
    • 10 $302.18
    • 100 $302.18
    • 1000 $302.18
    • 10000 $302.18
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    Siemens 3RU1136-4EB0ZOE

    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Onlinecomponents.com 3RU1136-4EB0ZOE
    • 1 $247.61
    • 10 $232.14
    • 100 $232.14
    • 1000 $232.14
    • 10000 $232.14
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    Siemens 3RU1146-4HD0

    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Onlinecomponents.com 3RU1146-4HD0
    • 1 $220.23
    • 10 $206.46
    • 100 $206.46
    • 1000 $206.46
    • 10000 $206.46
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    Siemens 3RU1116-1HB0ZOE

    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Onlinecomponents.com 3RU1116-1HB0ZOE
    • 1 $330.97
    • 10 $310.29
    • 100 $310.29
    • 1000 $310.29
    • 10000 $310.29
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    Find more 3RU11 price and stock on Findchips.com

    3RU11 Datasheets (50)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    3RU1116-0AB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-0BB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-0CB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-0DB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-0EB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-0FB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-0GB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-0HB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-0JB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-0KB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-1AB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-1BB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-1CB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-1DB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-1EB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-1FB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-1GB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-1HB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-1JB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF
    3RU1116-1KB0 Siemens Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Original PDF

    3RU11 Datasheets Context Search

    Catalog Datasheet MFG & Type Document Tags PDF

    DMT 98

    Abstract: DMT 98 ATEX G 001 3RU1136-4DB0 siemens sirius
    Text: технический паспорт изделия 3RU1136-4DB0 РЕЛЕ ПЕРЕГРУЗКИ, 18.25 A, 1НO+1НЗ, ТИПОРАЗМЕР S2, КЛАСС 10, ДЛЯ МОНТАЖА НА КОНТАКТОР Общие технические детали: Фирменное название продукта


    Original     		3RU1136-4DB0 com/WW/view/en/3RU1136-4DB0/all DMT 98 DMT 98 ATEX G 001 3RU1136-4DB0 siemens sirius PDF

    3RV1331-4FC10

    Abstract: 3RV1341-4JC10 3RV1321-4AC10 3RV13 3RV1331-4EC10 3RV1341-4KC10 3RV1321-1FC10 3RV1321-4BC10 3RV1331-4GC10 Contactor iec 947-4-1
    Text: 3RU11 Thermally Delayed Overload Relays up to 100 A • CLASS 10 SIRIUS 3R Technical data according to IEC 60 947-4-1 and IEC 60 947-5-1 Type 3RU11 16-. 3RU11 26-. 3RU11 36-. 3RU11 46-. Size S00 S0 S2 S3 Trip class acc. to IEC 60 947-4-1 CLASS 10


    Original     		3RU11 EX-97 3RV1331-4FC10 3RV1341-4JC10 3RV1321-4AC10 3RV13 3RV1331-4EC10 3RV1341-4KC10 3RV1321-1FC10 3RV1321-4BC10 3RV1331-4GC10 Contactor iec 947-4-1 PDF

    siemens IEC 60947-4-1

    Abstract: 3RV13 11 kw SIEMENS motor DMT 98 41-4KC10 41-4LC10 41-4JC10 Siemens IEC MOTOR CONTACTOR 31-4HC10 siemens 3RV13 21
    Text: Overload Relays 3RU1 Thermal Overload Relays 3RU11 for standard applications • Technical specifications Type 3RU11 16 3RU11 26 3RU11 36 3RU11 46 Size S00 S0 S2 S3 Width 45mm 45mm 55mm 70mm General data Overload and phase failure Trips in the event of Trip class according to IEC 60947-4-1


    Original     		3RU11 3RV13 41-4MC10 siemens IEC 60947-4-1 11 kw SIEMENS motor DMT 98 41-4KC10 41-4LC10 41-4JC10 Siemens IEC MOTOR CONTACTOR 31-4HC10 siemens 3RV13 21 PDF

    siemens 3UA59

    Abstract: siemens 3ua59 00 3UA SIEMENS 3UA* siemens siemens sirius 3r 3RB12 3UA59* siemens 3tf2 siemens 3UA7* siemens 3UA59
    Text: Schaltgeräte für Verbraucherabzweige Überlastrelais, Thermistor-Motorschutz, Fehlerstromschutzeinrichtung, Stromrelais Thermisch verzögerte Überlastrelais 3RU11 Seite 3UA Seite SIRIUS 3R für Auslösezeiten bis 10 s mit Schraubanschluß mit Cage-Clamp-Anschluß


    Original     		3RU11 3RB10 3RB12 NSK-7600 NSK-7601 3RU11 NSK-7599 NSK-7515a siemens 3UA59 siemens 3ua59 00 3UA SIEMENS 3UA* siemens siemens sirius 3r 3RB12 3UA59* siemens 3tf2 siemens 3UA7* siemens 3UA59 PDF

    DMT 98 ATEX G 001

    Abstract: DMT 98 3RU1116-1HB0 3RU1116 siemens sirius siemens S00 siemens 230 98 Siemens Sirius class 10 120A3
    Text: технический паспорт изделия 3RU1116-1HB0 РЕЛЕ ПЕРЕГРУЗКИ, 5.5.8 A, 1НO+1НЗ, ТИПОРАЗМЕР S00, КЛАСС 10, ДЛЯ МОНТАЖА НА КОНТАКТОР Общие технические детали: Фирменное название продукта


    Original     		3RU1116-1HB0 com/WW/view/en/3RU1116-1HB0/all DMT 98 ATEX G 001 DMT 98 3RU1116-1HB0 3RU1116 siemens sirius siemens S00 siemens 230 98 Siemens Sirius class 10 120A3 PDF

    siemens sirius 3r

    Abstract: Sirius 3R 3RT1044 3RB1056-1FG0 3RB1066-1KG0 3RB1066-1GG0 3UA7* siemens 3rt1036 3RT1035 3RU1126-4AB0
    Text: IEC Overload Relays GENERAL SIRIUS 3RU11 Bimetallic Class 10 Overload Relays Description 3RU11 overload relays belong to the new generation of SIRIUS 3R control products. The 3RU11 overload relays replace the highly successful 3UA5 and 3UA7 devices. Outstanding


    Original     		3RU11 3RT10 3RB105--for 3RT105 3RB1056-1FW 3RT1054 siemens sirius 3r Sirius 3R 3RT1044 3RB1056-1FG0 3RB1066-1KG0 3RB1066-1GG0 3UA7* siemens 3rt1036 3RT1035 3RU1126-4AB0 PDF

    3TF68

    Abstract: 3rb12 3RB22 3RB29 3TF69 3RB21 siemens PTC thermistor 3rn siemens IEC 60947-4-1 Sirius 3RB20, 3RB21 siemens PTC thermistor relay
    Text: Siemens AG 2007 Overload Relays General data • Overview Features Benefits 3RU11 3RB20/3RB21 3RB22/3RB23 S00 . S12 S00 . S12 0.1 . 630 A 0.3 . 630 A . 820 A 1) General data Sizes • Are coordinated with the dimensions, connections S00 . S3


    Original     		3RU11 3RB20/3RB21 3RB22/3RB23 S10/S12) 3RT19 3RB22/3RB23 3RP19 3RB29 3RB19 00-0B 3TF68 3rb12 3RB22 3TF69 3RB21 siemens PTC thermistor 3rn siemens IEC 60947-4-1 Sirius 3RB20, 3RB21 siemens PTC thermistor relay PDF

    siemens IEC 60947-4-1

    Abstract: siemens contactors price siemens 110 kW motors 3tb52 3RB2056 catalog for 3RT2 contactor* siemens CONTACTOR 3RH1921-1DA11 3RT1056 3RH22 wiring diagram contactor siemens
    Text: Siemens AG 2013 Switching Devices – Contactors and Contactor Assemblies – for Switching Motors 3/2 3/6 3/13 3/40 3/64 3/65 3/91 3/96 3/112 3/117 3/127 3/135 3/145 3/150 3/158 3/164 3/173 3/180 3/181 3/183 3/184 3/188 3/193 Introduction Power contactors


    Original     		3RT20 3RT10 3RT12 3RA27, 3RA28, 3RA29 3RA2910-0 3RA27 siemens IEC 60947-4-1 siemens contactors price siemens 110 kW motors 3tb52 3RB2056 catalog for 3RT2 contactor* siemens CONTACTOR 3RH1921-1DA11 3RT1056 3RH22 wiring diagram contactor siemens PDF

    3vf1

    Abstract: 3TF44 siemens 3th42 3VF6 3VU13 7pr41 3TF3 3TH44 siemens 3th2 3na3 372 siemens
    Text: Anhang Normen und Approbationen Bezeichnungszubehör für Schaltgeräte Seite Publikationen, Normen, Bestimmungen, Approbationen – Wichtige Publikationen und Bestimmungen – Prüfbehörden, ApprobationsKennzeichen und Approbationspflicht – Schiffsklassifikationsgesellschaften


    Original     		PDF

    3TF6

    Abstract: 5611A B siemens softstarter wiring diagram 3RW40 3RP15 05-1AP30 1KB4
    Text: SIRIUS Datasheet 2009 Low Voltage Controls & Distribution Answers for industry. s Pressing, equipping, transporting. These functions run in many automated production environments. You’ll find everything that you need to switch, protect and start motors with the extensive portfolio of the modular SIRIUS system.


    Original     		H-1/187, 3TF6 5611A B siemens softstarter wiring diagram 3RW40 3RP15 05-1AP30 1KB4 PDF

    catalog for 3RT series contactor* siemens

    Abstract: catalog for 3tf series contactor* siemens 3RT siemens siemens contactor 3TF siemens magnetic contactor siemens contactor 3rt 3th42 siemens 3th42 catalog for 3RT Power contactor* siemens 3TB siemens contactor
    Text: Controls – Contactors and Contactor Assemblies 3/2 3/4 3/8 3/30 3/31 3/34 3/35 3/38 3/43 3/46 3/53 3/54 3/55 3/56 3/58 3/61 3/62 3/64 3/66 3/67 3/68 3/69 3/73 3/74 3/75 Introduction 3RT, 3TB, 3TF Contactors for Switching Motors General data 3RT10 contactors, 3-pole, 3 . 250 kW


    Original     		3RT10 3RT12 3RA13, 3RA14 3RA13 46-3KF44-0LA0 catalog for 3RT series contactor* siemens catalog for 3tf series contactor* siemens 3RT siemens siemens contactor 3TF siemens magnetic contactor siemens contactor 3rt 3th42 siemens 3th42 catalog for 3RT Power contactor* siemens 3TB siemens contactor PDF

    siemens contactor IEC 60947 VDE 0660

    Abstract: catalog for 3RT series contactor* siemens catalog for 3RT Power contactor* siemens Sirius 3Rv catalog for 3RU overload relays siemens DMT 02 ATEX F 001 dmt 90 atex g 001 siemens magnetic contactor 3VU13 siemens IEC 60947-4-1
    Text: Protection Equipment Circuit Breakers • Molded Case Motor Starter Protectors Reference Manual • April 2009 Low-Voltage Controls and Distribution Protection Equipment 4 7 8 10 10 13 23 24 27 27 28 29 30 32 33 33 34 34 35 42 43 44 45 46 48 49 50 51 51 52


    Original     		PDF

    3ZX1012-0RU11-1AA1

    Abstract: 3RU1116 siemens sirius 3r relais siemens RU-00207 siemens 3RU1116 RU-00208 RU-00200 siemens IEC 60947 3RU12
    Text: SIRIUS 3R Überlastrelais 3RU1.1 3RU1.2 Overload Relay Relais de surcharge EN 60947, IEC 947 Bestell-Nr./Order No.: 3ZX1012-0RU11-1AA1 RU-00207 RU-00208 Montageanleitung/Assembly Instructions RU-00200 3 3 1 1 3 2 2 Demontage RU-00202 A max. + 60 °C max. + 70 °C


    Original     		3ZX1012-0RU11-1AA1 RU-00207 RU-00208 RU-00200 RU-00202 RU-00203 RU-00205 RU-00204 3RU1116-. 3ZX1012-0RU11-1AA1 3RU1116 siemens sirius 3r relais siemens RU-00207 siemens 3RU1116 RU-00208 RU-00200 siemens IEC 60947 3RU12 PDF

    siemens sirius 3r

    Abstract: a/3RV10
    Text: 3RT10 Contactors for Switching Motors SIRIUS 3R Technical data s and u ratings of the contactors Contactor Size Type AC V Rated insulation voltage Conventional thermal current Free air and enclosed Maximum horsepower ratings s and u-approved values Ratings


    Original     		3RT10 siemens sirius 3r a/3RV10 PDF

    3 phase motor soft starter 6.6 kv circuit diagram

    Abstract: 3RT1026-1A 3RW34 wiring diagram soft start 3RW30 3RW30 3rt1034 3RU1116-1JBO 3RT1024-1A star delta wiring diagram motor how to bypass 3RT1044
    Text: 8 3RW3 semiconductor motor control unit soft starter Section Subject Page 8.1 Specifications/regulations/approvals 8-3 8.2 Device description 8-5 8.2.1 Physical principles 8-6 8.2.2 General device description 8-10 8.2.3 Comparison of the 3RW3 semiconductor motor control unit (soft starter) with the SIKOSTART 3RW22 and 8-14


    Original     		3RW22 3RW34 3RW30 25-1AB-4 25-1AB 26-1AB 3 phase motor soft starter 6.6 kv circuit diagram 3RT1026-1A wiring diagram soft start 3RW30 3rt1034 3RU1116-1JBO 3RT1024-1A star delta wiring diagram motor how to bypass 3RT1044 PDF

    Untitled

    Abstract: No abstract text available
    Text: Solid State Motor Contactor 3 Phase Motor Reversing Types REC2R AC electronic motor Reversing Relay Instantaneous Switching Three phase with two pole switching Control status LED indication Two control input ranges: 24 VAC/DC, 90-253 VAC Motor rating up to 3kW 3.0 HP


    Original     		3RU11 TA25DU-8 3RU1126-1FB0 PDF

    3RT103

    Abstract: 3RT104 3RU21 3RU1136-4FB0 3RB21 3RU1936-3AA01 3RU11 3RB30 3RU1146-4JB0 3RU2116-1CB0
    Text: 1396-2012:QuarkCatalogTempNew 9/12/12 8:51 AM Page 1396 TEST & MEASUREMENT 15 Overload Relays Thermal Overload Relays Solid-State Overload Relays ᭤ Screw Terminals ᭤ Trip Type Class 5, 10, 20 and 30 Adjustable ᭤ Overload Protection, Phase Failure Protection


    Original     		3RU11/3RU21 3RT103 3RT104 3RU21 3RU1136-4FB0 3RB21 3RU1936-3AA01 3RU11 3RB30 3RU1146-4JB0 3RU2116-1CB0 PDF

    3RA19 13-2a

    Abstract: 3RA13 3RT10 76 3RT10 3RT1044 3RA19 3RT10 35 3RA19 24-2B 3RA19 23-2A 3RT1016
    Text: Фидерные комбинации 3…45 kW - Фидерные комбинации 3RA1 для коммутации двигателей SIRIUS Комбинации контакторов 3RA13 для реверсирования могут быть заказаны в следующем виде:


    Original     		3RA13 3RU11 3RT10 3RA19 3RA13 24-8XB30-1 25-8XB30-1 3RA19 13-2a 3RT10 76 3RT1044 3RT10 35 3RA19 24-2B 3RA19 23-2A 3RT1016 PDF

    3RH19 21

    Abstract: 3RT1044 3rt1034 rt11 relay 3RT1035 3RT1046 3RT1036 3RT1045 3RT10 Contactor iec 947-4-1 ac1
    Text: 3RT1/3RH1 contactors 3 3RT1/3RH1 contactors 3.7 Technical specifications 3RT10 contactors for switching motors s and u rating data of the contactors Contactor Frame size Type VAC Rated insulation voltage Continuous current at 40 °C Open and enclosed A S00


    Original     		3RT10 3RH19 21 3RT1044 3rt1034 rt11 relay 3RT1035 3RT1046 3RT1036 3RT1045 Contactor iec 947-4-1 ac1 PDF

    DMT 02 ATEX F 001

    Abstract: 3RV28 sirius dmt 02 atex f 001 catalog for 3RU overload relays siemens 3RA2921-1A 3RB2283-4AC1 3RV2011 3RB2143-4EB0
    Text: Protection Equipment 7/2 7/7 7/19 7/21 7/22 7/23 7/24 7/25 7/26 7/29 7/32 7/33 7/37 7/40 7/44 7/55 7/56 7/57 7/58 7/59 7/60 7/61 7/62 7/65 7/67 7/69 7/71 7/73 7/78 7/79 7/80 7/81 Price groups PG 14O, 41B, 41E, 41F, 41G, 41H, 41J, 42F, 42J, 4N1 7/82 Introduction


    Original     		489/CSA 3RA2908-1A 3RT1900-1SB20 3RT2900-1SB20 01429b DMT 02 ATEX F 001 3RV28 sirius dmt 02 atex f 001 catalog for 3RU overload relays siemens 3RA2921-1A 3RB2283-4AC1 3RV2011 3RB2143-4EB0 PDF

    3ZX1012-0RH11-1AA1

    Abstract: 3ZX1012-0RT02-1AA1 siemens contactor IEC 60947 VDE 0660 EN 60947 VDE 0660 IEC 947 3ZX1012-0RU11-1CA1 SIEMENS 3ZX1012-0RT02-1AA1 IEC 947 EN 60947 siemens sirius 3r 3ZX1012-0RU11-1AA1 3ZX1012-0RT03-1AA1
    Text: SIRIUS 3R Schütz 3RT1.1 3RH11 Contactor Contacteur DIN VDE 0660, IEC 947 Montageanleitung/Assembly Instructions Bestell-Nr./Order No.: 3ZX1012-0RH11-1AA1 RT-00238 RT-00239 M4 RT-00241 1 RT-00240 2 1 RT -00243 RT-00242 2 GWA 4NEB 506 0817-10 Last update: 20 March 1997


    Original     		3RH11 3ZX1012-0RH11-1AA1 RT-00240 RT-00374 3RT1916-4JA02 3RH11. 8US1998-7CA05 8US1998-7CA06 8US1998-7CA08 3ZX1012-0RH11-1AA1 3ZX1012-0RT02-1AA1 siemens contactor IEC 60947 VDE 0660 EN 60947 VDE 0660 IEC 947 3ZX1012-0RU11-1CA1 SIEMENS 3ZX1012-0RT02-1AA1 IEC 947 EN 60947 siemens sirius 3r 3ZX1012-0RU11-1AA1 3ZX1012-0RT03-1AA1 PDF

    3RT10 15-1AP01

    Abstract: 3RH19 21-1HA22 3RT1017 3TF28 3RT10 15-1AB01 3RH19 21 3RT13 16-1BB40 siemens sirius 3r 3rt1025 SIEMENS 3RT1026
    Text: Schaltgeräte für Verbraucherabzweige Schütze, Schützkombinationen SIRIUS 3R Schütze SIRIUS 3R mit Schraubanschluß bis 45 kW Seite Schütze 3RT10 zum Schalten von Motoren, 3polig, S00 bis S3 mit aufsetzbaren Hilfsschalterblöcken Technische Daten Beschreibung


    Original     		3RT10 3RT16, 3RT13 3RT15 NSK-8093 NSK-8094 3RT10 3RA19 NSK-7789 3RT10 15-1AP01 3RH19 21-1HA22 3RT1017 3TF28 3RT10 15-1AB01 3RH19 21 3RT13 16-1BB40 siemens sirius 3r 3rt1025 SIEMENS 3RT1026 PDF

    REC 53A

    Abstract: No abstract text available
    Text: Solid State Motor Contactor 3-Phase Types REC2B, REC3B • AC electronic motor contactor • Instantaneous Switching • Three-pole with two-phase and three phase switching options • Control status LED indication • Two control input ranges: 15-32 VDC, 90-253 VAC


    Original     		600Vrms. 3RU11 TA25DU-8 3RU1126-1FB0 REC 53A PDF

    siemens contactor 3rt10

    Abstract: 3RB20 SIEMENS siemens trip relay 241 siemens star delta contactor Siemens 3RT10 3RA14 SIEMENS MOTOR CONTACTOR OVERLOAD BLOCK siemens relays 3RU11 wye-delta siemens contactor
    Text: 3RA13, 3RA14 Contactor Assemblies 3RA14 Contactor Assemblies for Wye-Delta Starting 3RA14 complete units, 3 . 75 kW 3 • Overview These 3RA14 contactor assemblies for wye-delta starting are designed for standard applications. A dead interval of 50 ms on reversing is already integrated in the


    Original     		3RA13, 3RA14 3RU11 16-1HB0 16-1JB0 siemens contactor 3rt10 3RB20 SIEMENS siemens trip relay 241 siemens star delta contactor Siemens 3RT10 SIEMENS MOTOR CONTACTOR OVERLOAD BLOCK siemens relays 3RU11 wye-delta siemens contactor PDF