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Instructions for Installation, Operation and

Maintenance of Magnum SB Insulated Case

Low Voltage Power Circuit Breakers

EATON CORPORATION

www.eaton.com

Instructional Leaflet

IB2C12063H03

Effective March 2012

Section 3: Circuit Breaker Description and
Operation

Introduction

Magnum SB circuit breakers are available in both drawout and

fixed mounting configurations (

Figures 17 and 18

) . A majority

of features are common to all configurations, and will be

discussed in this section . The mounting features unique to the

drawout and fixed configurations will be covered individually in

Sections 4 and 5 respectively .
Controls and indicators for both drawout and fixed circuit

breakers are functionally grouped on the front of the circuit

breaker . The front escutcheon (faceplate) is common for all

Magnum frame sizes up through 5000 amperes .

Double Wide frame circuit breakers utilize six (or eight) sets of

rear primary connections; these circuit breakers are available

from the factory with several different phase sequences,

distinguishable by the sixth character in the model number .

The phase sequence is also labeled on the rear of the circuit

breaker (

Figure 19

) . For drawout breakers, phase sequence

labels are also supplied with the cassette and must be applied

by the switchgear builder . Circuit breakers with different phase

sequences are not interchangeable . Drawout breakers with

differing phase sequence are prevented from insertion into the

cassette by properly assembled rejection key plates (Refer to

“Rejection Interlocks” on

page 11

) .

1 . Baffled Arc Chute Cover
2 . Secondary Disconnects (Contacts)
3 . Faceplate (Front Cover)
4 . Drawout Rail Supports
5 . Integral Lifting Handle

6 . Primary Disconnect Finger Cluster
7 . Arc Chamber
8 . Primary Vertical Adapter
9 . Sensor Rating Viewing Window
10 . Levering Device Bearing Plate
11 . Padlockable Levering Device Access Door
12 . Circuit Breaker Nameplate

Figure 17. Typical Drawout Circuit Breaker Features (Front and Rear Views)

Содержание SBN-508

Страница 1: ...LICATION OR MISINSTALLATION OF ITS PRODUCTS WARNING OBSERVE ALL RECOMMENDATIONS NOTES CAUTIONS AND WARNINGS RELATING TO THE SAFETY OF PERSONNEL AND EQUIPMENT OBSERVE AND COMPLY WITH ALL GENERAL AND LOCAL HEALTH AND SAFETY LAWS CODES AND PROCEDURES CAUTION TESTING A CIRCUIT BREAKER WHILE IN SERVICE AND CARRYING LOAD CURRENT IS NOT RECOMMENDED FOR POWER AND MEDIUM VOLTAGE CIRCUIT BREAKERS TESTING TH...

Страница 2: ... 27 Fixed Instantaneous Non Adjustable Setting 27 High Instantaneous Trip 27 Voltage Taps 28 Secondary Contacts and Connection Diagrams 28 Contents Page Connection Diagrams 29 Accessory Devices 48 Plug In Electrical Accessories 48 Internal Electrical Accessories 50 Mechanical Accessories 52 Section 4 Drawout Circuit Breaker And Cassette General 55 Drawout Cassette 55 Drawout Circuit Breaker Dimens...

Страница 3: ...ed From Top of Arc Chamber Arc Chute Removed and Circuit Breaker Closed 24 Figures Page Figure 33 Pictorial Diagram of Typical Current Sensing Processing and Tripping System 25 Figure 34 Digitrip RMS 1150 Programmable Trip Unit Installed in Magnum SB Circuit Breaker 26 Figure 35 Hand Held Tester 26 Figure 36 Replaceable Current Sensors Shown with Bottom Adapters and Cover Plate Removed 27 Figure 3...

Страница 4: ... 83 Typical Narrow Frame Cassette Horizontal Terminals 57 Figure 84 Typical Basic Cassette Without Stabs 57 Figure 85 Typical Standard Cassette Vertical Terminals 57 Figure 86 Typical Universal Cassette 4 Pole Flat Terminal Pads 57 Figure 87 Fixed Circuit Breaker with Available Vertical Adaptor 58 Figure 88 Nameplate SB 60 Figure 89 Top Rear View of Circuit Breaker with One Arc Chute Removed 61 Fi...

Страница 5: ... PERSONNEL ARE ALERT TO WARNINGS IN ADDITION CAUTIONS ARE ALL UPPER CASE AND BOLDFACE Section 1 Introduction General Information The Magnum SB Power Circuit Breaker can be fixed or drawout air circuit breaker utilizing an electronic tripping system It is designed for use in both switchboard and metal enclosed switchgear assemblies having maximum voltages of 635 volts ac Magnum SB circuit breakers ...

Страница 6: ...Double wide Fixed SB Narrow Frame Fixed SB Standard Frame Drawout SB Figure 1 Family of Magnum SB Low Voltage Power Fixed and Drawout Circuit Breakers 800 5000 Amperes Safety Features Magnum SB circuit breakers and associated drawout equipment are manufactured with built in interlocks and safety related features They are provided to reduce hazards to operating personnel and provide proper operatin...

Страница 7: ... SBS 625 65 65 65 45 18 X In j 2500 SBS C25 85 100 100 45 18 X In j 2500 SBS E25 150 200 50 50kA 3000 SBS 630 65 65 65 50 18 X In j 3000 SBS C30 85 100 100 50 18 X In j 3000 SBS E30 150 200 50 50kA 4000 SBS 840 85 100 100 72 18 X In j 4000 SBS C40 100 100 100 72 18 X In j 4000 SBS E40 150 200 50 50kA 4000 SBN 840 65 85 85 72k 18 X In j 4000 SBN C40 65 100 100 72k 18 X In j 5000 SBS 850 85 85 85 85...

Страница 8: ...electricity and the proper way to perform such work The individual should be able to deenergize clear and tag circuits in accordance with established safety practices Other Publications And Documentation In addition to this instruction manual other printed information and documentation is available and supplied as appropriate This additional information can include but not necessarily be limited t...

Страница 9: ...aker and or cassette are mounted to a wooden shipping pallet On drawout circuit breakers shipped without a cassette two shipping clamps hook into the breaker side plates and are held to the pallet with 4 lag screws Figure 4 Remove the lag screws and clamps Save the screws and clamps for future shipment of the breaker On empty cassettes remove the 4 or 5 lag screws and or machine screws which pass ...

Страница 10: ...g and tilt If the circuit breaker is to be lifted onto compartment extension rails follow the instructions on page 11 entitled Installing Drawout Circuit Breaker Table 2 Basic Circuit Breaker Weights Breaker Model Fixed 3P 4P Weights lbs Drawout 3P 4P Universal Cassette 3P 4P SBN 508 95 120 107 136 61 70 SBN 608 95 120 107 136 61 70 SBN C08 95 120 107 136 61 70 SBN 512 95 120 107 136 61 70 SBN 612...

Страница 11: ... PROPERLY SEATED ON THE EXTENSION RAILS IT COULD FALL FROM THE RAILS CAUSING EQUIPMENT DAMAGE AND OR BODILY INJURY Figure 6 Rear View Showing Current Sensor Rating Through Viewing Window Carefully lower the circuit breaker down onto the extension rails Be certain that the circuit breaker s four molded drawout rail supports are fully seated in the extension rail cutouts on both sides Figure 7 Do no...

Страница 12: ...s in the cassette in keeping with those outlined in Table 1 of IL2C113863 for MDN SBN breakers and or Table 1 of IL2C15760 for MDS SBS breakers and the information supplied on the circuit breaker s nameplate Proceed if the circuit breaker and cassette are compatible From Table 3 make a pin location comparison Stop nuts should be torqued to 8 10 Ft Lb Figure 8 Cassette Rejection Interlock Pin Posit...

Страница 13: ... Connections Made Breaker On Extension Rails Remove or Inspection Position Figure 10 Remove Position Only Ground Connection Made Breaker Still Behind Door Typical Storage Position Primary Connections Not Made Compartment Front Door Secondary Connection Not Made Circuit Breaker Side View Rear of Compartment Figure 11 Disconnect Position Breaker and Trip Unit Testing Primary Connection Not Made Seco...

Страница 14: ...GREEN target line labelled DISC on the inside top left wall of the cassette Figure 14 Levering Circuit Breaker CAUTION DO NOT DISABLE REJECTION INTERLOCKS DOING SO AND USING A LOWER CAPACITY CIRCUIT BREAKER IN AN INCOMPATIBLE CASSETTE COULD RESULT IN AN ELECTRICAL FAULT WHICH COULD RESULT IN DEATH BODILY INJURY AND OR EQUIPMENT DAMAGE The circuit breaker is now ready to be levered With the circuit...

Страница 15: ...making vertical primary bus connections Secondary connections can be made through standard terminal blocks or a special connector compatible with the drawout circuit breaker s type secondary connector Both secondary connection devices are mounted at the top front of the circuit breaker Mounting Foot Figure 16 Typical Fixed Magnum SB Circuit Breaker The fixed circuit breaker frame has two mounting ...

Страница 16: ...e six or eight sets of rear primary connections these circuit breakers are available from the factory with several different phase sequences distinguishable by the sixth character in the model number The phase sequence is also labeled on the rear of the circuit breaker Figure 19 For drawout breakers phase sequence labels are also supplied with the cassette and must be applied by the switchgear bui...

Страница 17: ...com 1 Baffled Arc Chute Cover 2 Secondary Contact Connector 3 Faceplate Front Cover 4 Integral Lifting Handle 5 Fixed Horizontal Primary Terminal 6 Fixed Primary Terminal with optional Vertical Adapter 7 Arc Chamber 8 Sensor Rating Viewing Window 9 Mounting Foot 10 Circuit Breaker Nameplate Figure 18 Typical SBS SBSE Fixed Circuit Breaker Features Front and Rear Views SBSE shown without required a...

Страница 18: ...2012 1 Baffled Arc Chute Cover 2 Secondary Contact Connector 3 Faceplate Front Cover 4 Integral Lifting Handle 5 Fixed Vertical Primary Terminals with Optional Vertical Adaptor 6 Arc Chamber 7 Mounting Foot 8 Circuit Breaker Nameplate 9 Phase Identification Labels Figure 19 Typical Double wide SBS SBSE Standard Frame Fixed Circuit Breaker Features Front and Rear Views SBSE shown without required a...

Страница 19: ...lug 5 Contact Status Open Close 6 Spring Status Charged Discharged 7 Manual OFF Button Push 8 Manual ON Button Push 9 Manual Charge Handle 10 Optional Operation Counter 11 Padlockable Levering Device Access Door for Drawout Breaker 12 Color Coded Breaker Position Indicator 13 Nameplate 14 Trip Unit Test Port 15 Trip Unit Cover with Two Mounting Screws Mounting Screws will Accept Customer Supplied ...

Страница 20: ...ute assemblies connected mechanically and electrically in parallel to form one phase Front Cover Case Figure 21 Typical Magnum Construction Right Side View Primary Moving Contacts Depending upon the frame size each primary moving contact assembly is comprised of multiple individual copper contact fingers connected to the load conductor through flexible braided connectors Figure 22 Two flexible con...

Страница 21: ...ontact Assembly Primary Stationary Contacts The primary stationary contact is a combination of two items Figure 26 One is a conductive pad mounted on the line conductor which functions as the stationary main contact The other is an arc runner also connected to the line conductor The integral arc runner serves a dual purpose Fixed arcing contact Part of the arc chute Heel Main Contact Toe Arcing Co...

Страница 22: ... the circuit breaker Figure 20 Performing either operation is accomplished by pressing and releasing the appropriate button Access to these pushbuttons can be limited by the use of an optional padlockable cover In addition complete access to the ON button can be prevented with an optional prevent close cover The status of the springs and the primary contacts are always indicated in an indicator wi...

Страница 23: ...mmand is removed and reapplied Note that if the close signal is applied prematurely before the breaker is completely charged and latched the close command will be ignored until it is removed and reapplied For electrical closing a Latch Check Switch LCS option is available Refer to page 49 for details which will block the application of the electrical close command until the breaker is ready to clo...

Страница 24: ... detailed information pertaining to the different trip unit models available with Magnum SB circuit breakers refer to the specific instruction leaflet dedicated to the trip units IL70C1036 and IL70C1037 Microprocessor Based Trip Unit Magnum circuit breakers use any one of a family of Digitrip RMS trip units whose main features are summarized in Table 5 Model 520 is plug compatible and interchangea...

Страница 25: ...vides a secondary injection test that simulates the current sensors A small hand held Magnum functional Test Kit can also be used to check circuitry and mechanical tripping functions Figure 35 When the circuit breaker is shipped from the factory the trip unit s protective functions are normally set at minimum values For specific overload tripping characteristics and time current curves to coordina...

Страница 26: ...at level by sensor rating If the rating plug is removed from the trip unit the circuit breaker will trip if it is carrying current Make certain the rating plug is secured in position with its retaining screw Do not torque the retaining screw beyond 15 In Oz Refer to Table 6 for a tabulation of the available rating plugs Current Sensors Three toroidally wound current sensors are installed at the re...

Страница 27: ...dicators should also be reset by pushing momentarily after the cause of the fault has been diagnosed this will preserve the internal battery On trip units equipped for communication the LED reset function can be performed remotely using INCOM commands Making Current Release All Magnum SB Double wide circuit breaker trip units have a making current release function This safety feature prevents the ...

Страница 28: ...r 1150 Trip Unit Up to two secondary contact plug in connectors AMP each with 30 secondary points are mounted on the top rear portion of the circuit breaker The plug in connectors are protected by a molded hood Figure 39 How many connectors are mounted depends upon a number of considerations such as whether the circuit breaker is electrically or manually operated and how many features are required...

Страница 29: ... plug in connectors are joined and attached to the top portion of the circuit breaker The customer can plug secondary wiring with crimpon connectors into back of the plug in connectors subsequently the connections to the circuit breaker can be quickly joined or separated as required 2 With Terminal Block For those customers preferring to wire to a terminal block terminal blocks with finger proof h...

Страница 30: ...B 6 TO B 7 WILL ENABLE SOURCE GROUND FAULT SENSING AND DISABLE RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 NA 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME AS THE PHASE SEN SORS AND IS LOCATED WITHIN THE BREAKER FRAME THE SECONDARY C...

Страница 31: ...ED FROM B 6 TO B 7 WILL ENABLE SOURCE GROUND FAULT SENSING AND DISABLE RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 NA 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME AS THE PHASE SEN SORS AND IS LOCATED WITHIN THE BREAKER FRAME THE SEC...

Страница 32: ...ULT FUNCTIONALITY A JUMPER INSTALLED FROM B 6 TO B 7 WILL ENABLE SOURCE GROUND FAULT SENSING AND DISABLE RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 6 NORMALLY OPENED CONTACT PROGRAMMED AS RELAY A VIA DIGITRIP FRONT PANEL ALARM CONTACT THIS CAN ALSO BE ASSIGNED TO INDICATE MAINTENANCE MODE FEATURE IS IN USED 7 NORMALLY CLOSED CONTACT PROGRAMM...

Страница 33: ...Y HAVING GROUND FAULT FUNCTIONALITY A JUMPER INSTALLED FROM B 6 TO B 7 WILL ENABLE SOURCE GROUND FAULT SENSING AND DISABLE RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 THIS LEAD SUPPLIED ON G62 STYLE HIGH INSTANTANEOUS TRIP MODULE ONLY 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURR...

Страница 34: ...TALLED FROM B 6 TO B 7 WILL ENABLE SOURCE GROUND FAULT SENSING AND DISABLE RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 THIS LEAD SUPPLIED ON G62 STYLE HIGH INSTANTANEOUS TRIP MODULE ONLY 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME ...

Страница 35: ...L GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 6 NORMALLY OPENED CONTACT PROGRAMMED AS RELAY A VIA DIGITRIP FRONT PANEL ALARM CONTACT THIS CAN ALSO BE ASSIGNED TO INDICATE MAINTENANCE MODE FEATURE IS IN USED 7 NORMALLY CLOSED CONTACT PROGRAMMED AS RELAY B VIA DIGITRIP FRONT PANEL BLOCK CLOSE CONTACT 8 NORMALLY OPEN CONTACT PROGRAMMED AS RELAY C VIA DIG...

Страница 36: ...OURCE GROUND FAULT SENSING AND DISABLE RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 THIS LEAD SUPPLIED ON G62 STYLE HIGH INSTANTANEOUS TRIP MODULE ONLY 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME AS THE PHASE SENSORS AND IS LOCATED ...

Страница 37: ...RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 THIS LEAD SUPPLIED ON G62 STYLE HIGH INSTANTANEOUS TRIP MODULE ONLY 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME AS THE PHASE SENSORS AND IS LOCATED WITHIN THE BREAKER FRAME THE SECONDARY ...

Страница 38: ... AS RELAY A VIA DIGITRIP FRONT PANEL ALARM CONTACT THIS CAN ALSO BE ASSIGNED TO INDICATE MAINTENANCE MODE FEATURE IN USE 7 NORMALLY CLOSED CONTACT PROGRAMMED AS RELAY B VIA DIGITRIP FRONT PANEL BLOCK CLOSE CONTACT 8 NORMALLY OPEN CONTACT PROGRAMMED AS RELAY C VIA DIGITRIP FRONT PANEL LATCHING CONTACT 9 ON 4 POLE BREAKERS ACTUALLY 8 PHYSICAL POLES THE NEUTRAL CURRENT SENSORS ARE LOCATED WITHIN THE ...

Страница 39: ...E GROUND FAULT SENSING AND DISABLE RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 THIS LEAD SUPPLIED ON G62 STYLE HIGH INSTANTANEOUS TRIP MODULE ONLY 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME AS THE PHASE SENSORS AND IS LOCATED WITH...

Страница 40: ...ESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 THIS LEAD SUPPLIED ON G62 STYLE HIGH INSTANTANEOUS TRIP MODULE ONLY 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME AS THE PHASE SENSORS AND IS LOCATED WITHIN THE BREAKER FRAME THE SECONDARY C...

Страница 41: ...ROGRAMMED AS RELAY A VIA DIGITRIP FRONT PANEL ALARM CONTACT THIS CAN ALSO BE ASSIGNED TO INDICATE MAINTENANCE MODE FEATURE IN USE 7 NORMALLY CLOSED CONTACT PROGRAMMED AS RELAY B VIA DIGITRIP FRONT PANEL BLOCK CLOSE CONTACT 8 NORMALLY OPEN CONTACT PROGRAMMED AS RELAY C VIA DIGITRIP FRONT PANEL LATCHING CONTACT 9 ON 4 POLE BREAKERS ACTUALLY 8 PHYSICAL POLES THE NEUTRAL CURRENT SENSORS ARE LOCATED WI...

Страница 42: ... SOURCE GROUND FAULT SENSING AND DISABLE RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 THIS LEAD SUPPLIED ON G62 STYLE HIGH INSTANTANEOUS TRIP MODULE ONLY 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME AS THE PHASE SENSORS AND IS LOCATE...

Страница 43: ...BLE RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 THIS LEAD SUPPLIED ON G62 STYLE HIGH INSTANTANEOUS TRIP MODULE ONLY 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME AS THE PHASE SENSORS AND IS LOCATED WITHIN THE BREAKER FRAME THE SECOND...

Страница 44: ...ROGRAMMED AS RELAY A VIA DIGITRIP FRONT PANEL ALARM CONTACT THIS CAN ALSO BE ASSIGNED TO INDICATE MAINTENANCE MODE FEATURE IN USE 7 NORMALLY CLOSED CONTACT PROGRAMMED AS RELAY B VIA DIGITRIP FRONT PANEL BLOCK CLOSE CONTACT 8 NORMALLY OPEN CONTACT PROGRAMMED AS RELAY C VIA DIGITRIP FRONT PANEL LATCHING CONTACT 9 ON 4 POLE BREAKERS ACTUALLY 8 PHYSICAL POLES THE NEUTRAL CURRENT SENSORS ARE LOCATED WI...

Страница 45: ... SOURCE GROUND FAULT SENSING AND DISABLE RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 THIS LEAD SUPPLIED ON G62 STYLE HIGH INSTANTANEOUS TRIP MODULE ONLY 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME AS THE PHASE SENSORS AND IS LOCATE...

Страница 46: ...E RESIDUAL GROUND FAULT SENSING INPUTS B 4 AND B 5 WILL BE REASSIGNED FOR SOURCE GROUND SENSOR INPUTS 8 THIS LEAD SUPPLIED ON G62 STYLE HIGH INSTANTANEOUS TRIP MODULE ONLY 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE AND WIRED THE SAME AS THE PHASE SENSORS AND IS LOCATED WITHIN THE BREAKER FRAME THE SECONDAR...

Страница 47: ...CT PROGRAMMED AS RELAY A VIA DIGITRIP FRONT PANEL ALARM CONTACT THIS CAN ALSO BE ASSIGNED TO INDICATE MAINTENANCE MODE FEATURE IN USE 7 NORMALLY CLOSED CONTACT PROGRAMMED AS RELAY B VIA DIGITRIP FRONT PANEL BLOCK CLOSE CONTACT 8 NORMALLY OPEN CONTACT PROGRAMMED AS RELAY C VIA DIGITRIP FRONT PANEL LATCHING CONTACT 9 ON 4 POLE BREAKERS ACTUALLY 8 PHYSICAL POLES THE NEUTRAL CURRENT SENSORS ARE LOCATE...

Страница 48: ... electrical accessories Three can be viewed for identification by name and rating through viewing windows located in the right front of the circuit breaker Figure 60 All four are plug in type and can be factory installed or field installed using a UL listed kit The four Plug In accessories are Shunt Trip ST Spring Release SR Undervoltage Release UVR Auxiliary Switch Shunt Trip The shunt trip is an...

Страница 49: ...nal control schemes Note that wiring the LCS for Remote Indication directly in series with the SR accessory is not recommended as this will override the anti pump feature of the electrical charging closing system Figure 63 Spring Release with Optional Latch Switch Table 8 Spring Release Ratings Control Voltages Operational Voltage Range 70 110 Inrush Power j Consumption Closing Time ms 24 Vdc 17 2...

Страница 50: ...450 VA 10 VA 70 208 240 Vac k 177 264 Vac 62 144 Vac 400 VA 10 VA 70 380 415 Vac k 323 457 Vac 114 249 Vac 480 VA 10 VA 70 480 Vac k 408 528 Vac 144 288 Vac 400 VA 10 VA 70 600 Vac k 510 660 Vac 180 360 Vac 400 VA 10 VA 70 j Required for 200 ms k Required for 400 ms Figure 67 Mechanical Trip Indicator with Associated Overcurrent Trip Switch Internal Electrical Accessories Other electrical accessor...

Страница 51: ...erator can be factory or site installed Table 11 To convert a manually operated circuit breaker to an electrically operated circuit breaker a UL listed motor operator kit is available Table 11 Motor Operator Control j Voltages Operational Voltage Range 85 110 Running Current A avg Typical Inrush Current Power Consumption watts or VA Maximum Charging Time seconds 24 Vdc 20 26 12 0 300 of Running 30...

Страница 52: ... viewed through the front cover Figure 70 The customer supplies the key lock The provisions available are for Kirk Castell Ronis or CES Cassette Lock A cassette mounted lock can be used in conjunction with different interlocking schemes such as main tie main Figure 71 The lock holds the circuit breaker trip free in the connected position preventing it from being closed Figure 71 Cassette Mounted K...

Страница 53: ...ns to be made Figure 74 Figure 73 Typical Safety Shutters in Closed Position Figure 74 Typical Safety Shutters in Open Position Cassette Cell Switch The cassette cell switch is a compartment position switch for drawout circuit breakers It is available in a 2a2b or 4a4b con tact configuration and mounts on the right side of the cassette Figure 75 and 76 Refer to Table 9 for cell switch contact info...

Страница 54: ...The mechanical interlock holds one or more circuit breakers tripped prevents closure when others are closed A lever assembly is mounted on each breaker which interfaces with the pole shaft and the tripper bar The lever assemblies are interconnected with either cables or rods depending upon the relative orientation of the breakers Rods can be used only when the circuit breakers to be interlocked ar...

Страница 55: ...is used in combination with a fixed drawout cassette Figures 80 and 82 The drawout circuit breaker is equipped with automatic primary disconnects Figure 81 The cassette provides all of the necessary interfaces to the drawout circuit breaker including automatic primary and secondary connections For the narrow frame circuit breaker a single cassette style using horizontal stabs and horizontal custom...

Страница 56: ...ORPORATION www eaton com Instructional Leaflet IB2C12063H03 Effective March 2012 1 Extension Rails 2 Extension Rail Cutout 3 Secondary Plug in Connectors 4 Secondary Terminal Blocks 5 Arc Hood 6 Optional Cell TOC Switch Mounting 7 Optional Key Interlock Mounting Location 8 Grounding Bar Figure 82 Typical Drawout Cassette Features ...

Страница 57: ...Three different frame sizes cover all Magnum SB circuit breakers from an overall dimensional standpoint Circuit breaker drawings can be found in Engineering Data TD01301004E Figure 83 Typical Narrow Frame Cassette Horizontal Terminals Figure 84 Typical Basic Cassette Without Stabs Drawout Cassette Dimensions Cassette drawings provide all the dimensional information required for all mounting config...

Страница 58: ...discussed in Section 2 If necessary review that information since it will not be repeated here WARNING FAILURE TO COMPLY WITH INSTALLATION OF THE FIXED MOUNTED SBSE ARC HOOD ASSEMBLY COULD RESULT IN EQUIPMENT DAMAGE BODILY INJURY OR EVEN DEATH The SBSE fixed mounted breaker is shipped with a factory installed arc hood assembly This assembly is required to be installed on the top of the breaker pri...

Страница 59: ...humid with a signifi cant amount of dust and other foreign matter It is recommended that maintenance record sheets be com pleted for the equipment Careful and accurate documentation of all maintenance activities provides a valuable historical refer ence on equipment condition over time General Cleaning Recommendations Circuit breaker cleaning activities should be a part of an overall activity that...

Страница 60: ...needed 3 8 inch 17 mm socket Load conductors 3 8 inch 6 inch extension Levering in 17 mm combination wrench Load conductors 3 8 drive 8 mm or 5 16 long ball driver Line conductor arc runner AMP extraction tool 305183 Secondary contacts AMP extraction tool 455822 2 Current sensors shunt trip 3 Posi drive screwdriver Levering in 2 Philips screwdriver As needed 1 Philips screwdriver As needed Long 8 ...

Страница 61: ...ional testing can be achieved by using one of the following test methods 1 Hand Held Functional Test Kit Catalog Ordering Number MTST230V 2 Simulation Test Kit Catalog Ordering Number MTK2000 3 Digitrip 1150 models include an integral functional tester see corresponding instruction manual for Magnum 1150 trip units Charge the breaker mechanism springs either using the charg ing handle or the motor...

Страница 62: ...cts and secure in place with the screw removed earlier Torque the arc chute screws to 35 to 45 in lb Primary Contact Inspection With the arc chutes removed visually inspect each primary contact structure for signs of wear and or damage The primary contacts with the circuit breaker open can be viewed by looking directly down into the arc chamber Figure 91 and 92 A contact wear indicator is provided...

Страница 63: ...ly cover the ledge the contacts should be replaced WARNING ARC CHUTES MUST ALWAYS BE SECURED PROPERLY IN PLACE BEFORE A CIRCUIT BREAKER IS INSTALLED IN A CIRCUIT BREAKER COMPARTMENT FAILURE TO DO THIS COULD RESULTS IN EQUIPMENT DAMAGE BODILY INJURY OR EVEN DEATH Once the inspection is complete be sure the arc chutes are properly replaced as previously described on this page Figure 93 Use of Contac...

Страница 64: ...erminal adapters 444 516 50 17 58 30 Breaker Mechanism Inspection Torque values of mechanism and motor mounting hardware should be inspected for accuracy Refer to Table 14 for the correct values Next inspect all sliding rolling parts for clean and adequate lubrication Refer to Table 15 and Figure 94 through Figure 101 Table 15 Greases Used on Magnum Grease Type Description MagnalubeT G Eaton stand...

Страница 65: ...m SB Insulated Case Low Voltage Power Circuit Breakers EATON CORPORATION www eaton com Swing Arm Pad Swing Arm Path Lev in Door Indexer Lev in Door Interlock Figure 96 Magnum DS Lubrication Not applicable to Fixed Mount Breakers Figure 97 Magnum DS Lubrication Figure 98 Magnum DS Lubrication Figure 99 Magnum DS Lubrication ...

Страница 66: ...ote N If a rating plug is not installed in the trip unit the trip unit will trip when energized Also remember that the trip unit s rating plug and the circuit breaker s current sensors must have matching ratings To remove the rating plug from the trip unit open the small rating plug door located on the right side of the trip unit Figure 102 The trip unit s battery cavity is also located behind thi...

Страница 67: ... two hex head bolts with a 10 mm wrench These bolts do not have to be completely removed to slide the primary disconnects off of the terminals Remove the vertical adaptors next from the circuit breaker terminals by removing the two or three 10 mm bolts holding them in place Figure 104 The current sensors are removed by pulling them off of the terminals and unplugging the wiring plugs from the sens...

Страница 68: ...anism or main contacts welded Contact Cutler Hammer service center Circuit breaker makes no attempt to close with either local manual or remote controls springs do not discharge Closing spring not fully charged check SPRING CHARGED indicator Charge spring manually check voltage to electrical operator replace electrical operator if faulty Unplug undervoltage release from mounting deck and retry clo...

Страница 69: ...known the part name and style number If the style number is not known it would help to refer to a pictorial and or graphic reference Also include the circuit breaker type General Order number and other information as shown on the nameplate on the front cover of the circuit breaker Figures 2 and 20 Some detailed parts shown in the figures in this manual may only be available as a part of a sub asse...

Страница 70: ...t to the terms and conditions outlined in appropriate Eaton selling policies or other contractual agreement between Eaton and the purchaser THERE ARE NO UNDERSTANDINGS AGREEMENTS WARRANTIES EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY OTHER THAN THOSE SPECIFICALLY SET OUT IN ANY EXISTING CONTRACT BETWEEN THE PARTIES ANY SUCH CONTRACT STATES THE E...

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