Eaton MDN-408 Instructions For Installation, Operation And Maintenance Download Page 78

Page: 78 / 81

Instruction Book

Effective: May 2006

I.B. 2C12060H08

For more information visit: www.EatonElectrical.com

Page 68

Table 7.1 Circuit Breaker Troubleshooting Guide (continued from previous page)

Symptom

Probable Cause

Corrective Actions

Circuit breaker cannot

Shunt trip control signal

Check supply voltage exceeds

be opened remotely, but

absent or too low

70% of rated voltage when

can be opened locally

signal is applied to shunt trip

Shunt trip is faulty or

Remove front cover; check

improperly installed

voltage supplied to shunt
trip; make sure shunt trip is
seated and retainer snapped
into place. Check for shunt
trip motion; replace shunt
trip if faulty

Secondary contact wiring

Make sure electrical pin and

problem

socket connectors are properly
seated in molded plug. Verify
proper wiring

Circuit breaker cannot

OPEN pushbutton locked

Remove lock

be opened locally

Faulty mechanism or main

Contact Cutler-Hammer

contacts welded

service center

Circuit breaker makes

Closing spring not fully

Charge spring manually; check

no attempt to close with

charged (check SPRING

voltage to electrical operator;

either local (manual) or

CHARGED indicator)

replace electrical operator if

remote controls; springs

faulty

do not discharge

If equipped with undervoltage

Unplug undervoltage release

release, undervoltage release

from mounting deck and retry

is not energized or is faulty

closing operation; if OK, check
voltage supply to undervoltage
release (>85%); replace under-
voltage release if faulty

Circuit breaker locked in

Check reason for lock

OPEN position

Drawout position interlock

Make sure that circuit breaker is

is operating; levering screw

at a position that permits closure;
door is

open

check that shutter

(door) over the levering screw
is fully closed

Circuit breaker interlocked

Check for presence of an

with another circuit breaker

interlocking scheme (cable

or device

interlock or key interlock);
check to see if interlocked
circuit breaker is CLOSED

www

. ElectricalPartManuals

. com

Summary of Contents for MDN-408

Page 1: ...tion Operation and Maintenance of Magnum DS DSX and DSL Low Voltage Power Circuit Breakers I B 2C12060H08 Supersedes I B 2C12060H07 dated April 2005 Effective May 2006 IB2C12060H08 For more information visit www EatonElectrical com w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 2: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 3: ... the circuit breaker and if drawout it s mating cassette The Magnum DSL circuit breaker can only be supplied as a drawout device In the case of fixed versions of Magnum DS circuit breakers certain sections of this manual referring to such items as position interlocks and the drawout mechanism will not apply Trip units associated with Magnum DS DSX and DSL Power Circuit Breakers will be addressed i...

Page 4: ... 7 Fixed Circuit Breaker 10 2 8 Circuit Breaker Operation 10 SECTION 3 CIRCUIT BREAKER DESCRIPTION AND OPERATION 3 1 Introduction 11 3 1 1 MDSL Application Operation 15 3 2 Basic Circuit Breaker Assembly 15 3 3 Pole Units 15 3 3 1 Primary Moving Contacts 16 3 3 2 Primary Stationary Contacts 16 3 4 Operating Mechanism 17 3 4 1 Manual Operation 17 3 4 2 Electrical Operation 18 3 4 3 Anti Pump Featur...

Page 5: ...R 5 1 General 59 5 2 Fixed Circuit Breaker Dimensions 59 SECTION 6 INSPECTION AND MAINTENANCE 6 1 General 60 6 2 General Cleaning Recommendations 60 6 3 When to Inspect 60 6 4 What to Inspect 61 6 4 1 Functional Field Testing 61 6 4 2 Arc Chute Inspection 62 6 4 3 Primary Contact Inspection 63 6 5 Circuit Breaker Modifications and Changes 64 6 5 1 Rating Plug Replacement 64 6 5 2 Current Sensor Re...

Page 6: ... 14 3 6 Typical Magnum Construction Right Side View 15 3 7 Features of Magnum Moving Conductor Assembly 15 3 8 Narrow Frame 8 finger Moving Conductor Assembly 16 3 9 Standard Frame 12 finger Moving Conductor Assembly 16 3 10 Parital Cross Sectional View Shown in Closed Position 16 3 11 Electrically Operated Drawout MDS Circuit Breaker with Front Cover Removed 17 3 12 Circuit Breaker Closing Spring...

Page 7: ...w 53 3 55 Blow Fuse Indicator 53 4 1 Drawout Circuit Breaker in Cassette 55 4 2 Drawout Circuit Breaker with Automatic Primary Disconnects 55 4 3 Drawout Cassette Features 56 4 4 Narrow Frame Cassette Horizontal Terminals 57 4 5 Standard Cassette Vertical Terminals 57 4 6 Basic Cassette Without Stabs 57 4 7 Universal Cassette 4 Pole Flat Terminal Pads 57 4 8 Typical MDSL Standard Cassette Front Vi...

Page 8: ...ck Pin Locations 7 3 1 Magnum Digitrip Trip Units 20 3 2 Magnum DS Current Sensors and Matching Rating Plugs 22 3 3 Shunt Trip Ratings 46 3 4 Spring Release Ratings 47 3 5 Undervoltage Release 48 3 6 Auxiliary Switch Overcurrent Trip Switch and Cell Switch Contact Ratings 48 3 7 Motor Operator 49 3 8 MDSL Integral Current Limiter Selection 54 6 1 Inspection Frequency 60 7 1 Circuit Breaker Trouble...

Page 9: ...res 1 2 1 3 and 1 4 Magnum circuit breakers use a rigid frame housing of engineered thermoset composite resins which has high strength structural properties excellent dielectric char acteristics and arc tracking resistance MDS MDSX and MDSL drawout circuit breakers are a through the door design having three breaker positions with the compartment door closed CONNECT TEST DISCONNECT and one position...

Page 10: ...ting E Factory Equipped Accessories Maximum Breaker Interrupting Short Time Amperes Designation Rating Rating 800 MDN 408 42 kA 42 kA MDN 508 50 kA 50 kA MDN 608 65 kA 65 kA MDS X08 200 kA 240v 480v 30 kA MDS 408 42 kA 42 kA MDS 508 50 kA 50 kA MDS 608 65 kA 65 kA MDS 808 85 kA 85 kA MDS C08 100 kA 85 kA 1200 MDN 412 42 kA 42 kA MDN 512 50 kA 50 kA MDN 612 65 kA 65 kA MDS X12 200 kA 240v 480v 30 k...

Page 11: ... and the proper way to perform such work The individual should be able to de energize clear and tag circuits in accordance with established safety practices 1 5 OTHER PUBLICATIONS AND DOCUMENTATION In addition to this instruction manual other printed infor mation and documentation is available and supplied as appropriate This additional information can include but not necessarily be limited to an ...

Page 12: ...ct at all times Do not remove protective packaging until the breakers are ready for inspection testing and or installation When ready to inspect and install a Magnum circuit breaker carefully remove the banding straps and lift off the cardboard box Remove any additional packing material and internally packed documentation The cir cuit breaker and or cassette are mounted to a wooden shipping pallet...

Page 13: ...aker Weights 2 4 LIFTING CIRCUIT BREAKER DO NOT ATTEMPT TO LIFT CIRCUIT BREAKERS WITH ORDINARY CRANE HOOKS ROPES CHAINS OR OTHER SUCH DEVICES FAILURE TO FOLLOW THIS CAUTION COULD RESULT IN DAMAGE TO VITAL PARTS SUCH AS ARC CHUTES BARRIERS AND WIRING OR THE ENTIRE CIRCUIT BREAKER To closely examine install or just become more familiar with the circuit breaker carefully lift and place the circuit br...

Page 14: ...ON THE EXTENSION RAILS IT COULD FALL FROM THE RAILS CAUSING EQUIPMENT DAMAGE AND OR BODILY INJURY Carefully lower the circuit breaker down onto the exten sion rails Be certain that the circuit breaker s four mold ed drawout rail supports are fully seated in the exten sion rail cutouts on both sides Figure 2 4 Do not remove the lifting yoke from the circuit breaker until it is properly seated on th...

Page 15: ... not engaged with the levering mecha CAUTION nism The DISCONNECT TEST and CONNECT posi tions are reached by means of the levering mechanism With the breaker solidly positioned on the cassette s extension rails and the levering in mechanism in the DISCONNECT position carefully and firmly push the circuit breaker into the compartment as far as it will go The outer recessed portion of the circuit bre...

Page 16: ...on Rails Secondary Connection Not Made Circuit Breaker Side View Rear of Compartment Primary Connections Not Made Compartment Front Door Only Ground Connection Made Breaker Still Behind Door Typical Storage Position Circuit Breaker Side View Secondary Connection Made Rear of Compartment Primary Connections Not Made Compartment Front Door Breaker and Trip Unit Testing Primary Connection Not Made Se...

Page 17: ...t which is not provided Figure 2 11 As long as the access door is raised the circuit breaker is held trip free Begin by rotating the levering in screw to the full counterclock wise DISCONNECT position Close the compartment door and begin levering the breaker into its different positions using a clockwise ratcheting motion When the circuit breaker is levered fully to the DISCONNECT or CONNECT posit...

Page 18: ...connections Adapters are avail Mounting Foot Figure 2 11 Levering Position Indication CONNECT TEST DISCONNECT CONNECT TEST DISCONNECT NOTICE able for 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 ...

Page 19: ...hase sequence is also labeled on the rear of the circuit breaker Figure 3 4 For these DS and DSX drawout breakers phase sequence labels are also supplied with the cassette and must be applied by the switchgear builder Circuit brak ers with different phase sequences are not interchange able DS and DSX drawout breakers with differing phase sequence are prevented from insertion into the cassette by p...

Page 20: ...ptional Vertical Adapter Arc Chamber Sensor Rating Viewing Window Mounting Foot 6 7 8 9 10 1 1 2 3 4 4 5 6 7 8 9 9 10 Figure 3 3 Typical MDSL Drawout Circuit Breaker Features Front and Rear Views 7 8 10 9 11 Arc Chamber Integral Current Limiter Levering Device Bearing Plate Padlockable Levering Device Access Door Circuit Breaker Nameplate Baffled Arc Chute Cover Secondary Disconnects Contacts Face...

Page 21: ... Integral Lifting Handle Fixed Vertical Primary Terminals with Optional Vertical Adaptor Arc Chamber Mounting Foot Circuit Breaker Nameplate Phase Identification Labels Figure 3 4 Typical Double wide MDS MDSX Standard Frame Fixed Circuit Breaker Features Front and Rear Views MDSX shown without required arc hood 8 9 1 1 2 3 4 4 5 6 7 7 8 9 9 9 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 22: ...2 1 8 7 10 3 9 11 12 Manual OFF Button Push Manual ON Button Push Manual Charge Handle Optional Operation Counter Padlockable Levering Device Access Door for Drawout Breaker 5 8 7 Color Coded Breaker Position Indicator Nameplate Trip Unit Test Port Trip Unit Cover with Two Mounting Screws Mounting Screws will Accept Customer Supplied Lead Security Meter Seals 10 9 11 Red Green Yellow White Green R...

Page 23: ...pplications requiring the overload protection and switching functions of air circuit breakers on systems whose available fault currents 1 exceed the interrupting ratings of the circuit breakers alone and or 2 exceed the withstand and interrupting ratings of downstream circuit components The 800 through 2000 amp frame MDSL circuit break ers have integrally mounted limiters on the drawout breaker el...

Page 24: ...continuous and short circuit current ratings Figures 3 8 and 3 9 On some ratings fingers are removed and replaced with spacers The single contact finger performs both the main and arcing contact functions on different parts of the same finger Figure 3 7 A highly conductive alloy pad is part of the contact finger and functions as the moving main contact and is called the Heel The tip of the same co...

Page 25: ...operat ed circuit breaker in the field Figure 3 13 Manually operated circuit breakers are pre wired to accept this addition 3 3 2 PRIMARY STATIONARY CONTACTS The primary stationary contact is a combination of two items Figure 3 10 One is a conductive pad mounted on the line conductor which functions as the stationary main contact The other is an arc runner also connect ed to the line conductor The...

Page 26: ...bsequent attempt to close until the close command 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 see paragraph 3 8 1 which will block the application of the electrical close comman...

Page 27: ...ed in an insulating jacket which is removable from the top of the circuit breaker as previously described in paragraph 2 4 Each arc chute has a baffled top cover Figure 3 15 Integral Arc Runner Viewed From Top of Arc Chamber Arc Chute Removed Circuit Breaker Closed Integral Arc Runner Integral Arc Runner Figure 3 16 Magnum Arc Plate Assembly Top V Shaped Plates Top Plate for Arcing Contact V Shape...

Page 28: ...ditional features Contact Cutler Hammer for upgrading to Model 1150 The electronic trip units are self powered When the cir cuit breaker is closed no external power is required to operate their protective systems Current signal levels and the control power are derived from the current sen sors integrally mounted in the circuit breaker A functional local test of a major portion of the trip unit s e...

Page 29: ...arrying 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 3 2 for a tabulation of the available rating plugs 3 6 3 CURRENT SENSORS Three toroidally wound current sensors are installed at the rear of the circuit breaker on the lower terminals Figure 3 20 The sensors produce an output current proporti...

Page 30: ...able The switch is reset when the trip indicator is reset On optional Digitrip models with LED cause of trip indi cators these indicators should also be reset by pushing momentarily after the cause of the fault has been diag nosed this will preserve the internal battery On trip units equipped for communication the LED reset func tion can be performed remotely using INCOM com mands 3 6 6 MAKING CUR...

Page 31: ...points are mounted on the top rear portion of the circuit breaker The plug in connec tors are protected by a molded hood Figure 3 23 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 When the front cover of the circuit breaker is removed the top of each plug in con nect...

Page 32: ...omer can plug secondary wiring with crimp on 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 pre ferring to wire to a terminal block terminal blocks with finger proof hinged covers are added to the secondary configuration just described for a fixed circuit bre...

Page 33: ...HARGED AND RESET LCS OPEN VOLTAGE MUST BE REMOVED AND REAPPLIED TO THE SPRING RELEASE FOR SUBSEQUENT OPERATION 6 TO PROVIDE SELECTED TIME DELAYS FOR SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY HAVING GROUND FAULT FUNCTIONALITY A JUMPER INSTALLED FROM B 6 TO B 7 WILL ENABLE SOURCE GROUND...

Page 34: ...NCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY 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 T...

Page 35: ...EQUIRED 7 ON THREE POLE BREAKERS ONLY 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 NA 9 MOTOR OPERATOR SWITCH SHOWN WITH BREAKER CLOSING SPRING DISCHARGED 10 ON 4 POLE BREAKERS THE NEUTRAL CURRENT SENSOR IS THE SAME STYLE ...

Page 36: ... AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY 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 NA 9 MOTOR OPERATOR SWITCH SHO...

Page 37: ...BLE 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 PROGRAMMED AS RELAY B VIA DIGITRIP FRONT PANEL BLOCK CLOSE CONTACT 8 NORMALLY OPEN CONTACT PROGRAMMED AS RELA...

Page 38: ...ILL 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 PROGRAMMED AS RELAY B VIA DIGITRIP FRONT PANEL BLOCK CLOSE CON...

Page 39: ...PRING RELEASE THE CLOSING PULSE WILL OCCUR WHEN THE MECHANISM IS CHARGED AND RESET LCS OPEN VOLTAGE MUST BE REMOVED AND REAPPLIED TO THE SPRING RELEASE FOR SUBSEQUENT OPERATION 6 TO PROVIDE SELECTED TIME DELAYS FOR SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY HAVING GROUND FAULT FUNCTION...

Page 40: ...SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY 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 O...

Page 41: ...ELAYS FOR SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 5 3 WIRE CRIMP IF HIGH INST TRIP MODULE IS SUPPLIED 6 NORMALLY OPENED CONTACT 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 DI...

Page 42: ...ING PULSE WILL OCCUR WHEN THE MECHANISM IS CHARGED AND RESET LCS OPEN VOLTAGE MUST BE REMOVED AND REAPPLIED TO THE SPRING RELEASE FOR SUBSEQUENT OPERATION 6 TO PROVIDE SELECTED TIME DELAYS FOR SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY HAVING GROUND FAULT FUNCTIONALITY A JUMPER INSTALL...

Page 43: ...SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY 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 O...

Page 44: ...ELAYS FOR SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 5 3 WIRE CRIMP IF HIGH INST TRIP MODULE IS SUPPLIED 6 NORMALLY OPENED CONTACT 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 DI...

Page 45: ... SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY 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 ...

Page 46: ...E DELAYS FOR SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY 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 LE...

Page 47: ...SELECTED TIME DELAYS FOR SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 5 3 WIRE CRIMP IF HIGH INST TRIP MODULE IS SUPPLIED 6 NORMALLY OPENED CONTACT 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...

Page 48: ... SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY 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 ...

Page 49: ...E DELAYS FOR SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY 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 LE...

Page 50: ...SELECTED TIME DELAYS FOR SHORT TIME AND OR GROUND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 5 3 WIRE CRIMP IF HIGH INST TRIP MODULE IS SUPPLIED 6 NORMALLY OPENED CONTACT 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...

Page 51: ...UND TIME FUNCTIONS FOR TESTING OR NON ZONE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY 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 FOR NON AUTO OMIT DIGITRIP UNIT AND RELAT...

Page 52: ...PER FROM B 8 TO B 9 IS REQUIRED 7 ON THREE POLE BREAKERS ONLY 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 FOR NON AUTO OMIT DIGITRIP UNIT AND RELATED COMPONENTS AND WIRING FROM ASSEMBLY 9 MOTOR OPERATOR SWITCH SHOWN WITH ...

Page 53: ... 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 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 PA...

Page 54: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 55: ...reaker accessories are designed to fit all frame sizes The accessories fall into one of three categories Plug in electrical Internal electrical Mechanical 3 8 1 PLUG IN ELECTRICAL ACCESSORIES There are four Magnum Plug In electrical accessories Three can be viewed for identification by name and rat ing through viewing windows located in the right front of the circuit breaker Figure 3 47 All four a...

Page 56: ...ternal 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 fea ture of the electrical charging closing system Table 3 4 Spring Release Ratings Required for less than 200 ms Undervoltage Release The undervoltage release is an optional device on both manually and electrically operated circuit b...

Page 57: ... 400 VA 10 VA 400 VA 10 VA 70 70 70 70 70 70 70 70 70 70 Required for 200 ms Required for 400 ms Figure 3 53 Auxiliary Switch 2A 2B Figure 3 54 Mechanical Trip Indicator with Associated Overcurrent Trip Switch Mechanical Trip Indicator Table 3 6 Auxiliary Switch Overcurrent Trip Switch and Cell Switch Contact Ratings Control Contact Rating Voltages Inductive Load amperes 250 Vac 125 Vdc 250 Vdc 10...

Page 58: ... breaker Figures 3 55 and 3 56 It charges the closing springs electrically for remote or local operation The motor operator can be factory or site installed Table 3 7 To convert a manually operated circuit breaker to an electrically operated circuit breaker a UL listed motor operator kit is available Figure 3 56 Motor Operator Installed in Narrow Frame Circuit Breaker Table 3 7 Motor Operator Cont...

Page 59: ...ll or Ronis Cassette Lock A cassette mounted lock can be used in conjunction with different interlocking schemes such as main tie main Figure 3 58 The lock holds the cir cuit breaker trip free in the connected position prevent ing it from being closed Up to three lock cylinders can be installed on one cas sette Cutler Hammer supplies the lock provisions only The customer is responsible for the loc...

Page 60: ...the space between the circuit break er and the compartment door cutout It is supplied with a mounting gasket Figure 3 64 Figure 3 60 Typical Safety Shutters in Closed Position Figure 3 61 Typical Safety Shutters in Open Position Figure 3 62 Cell Switch Drawout Position Indicator Unmounted Figure 3 63 Cell Switches Mounted on Cassette Cassette Cell Switch The cassette cell switch is a compartment p...

Page 61: ...ver 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 are vertically stacked Cables can be used for any ori entation of the breakers Mechanical interlocks are available...

Page 62: ...re not electrically or physically inter changeable with current limiting fuses of any other design The current limiters are held in place in an extension provided on the back of the circuit breaker Figure 3 67 This extension makes the circuit breaker six inches deeper than the corresponding Magnum DS circuit breaker The current limiters can only be removed from the circuit breaker and replaced whe...

Page 63: ...ating plug and finally the current limiter Current limiters are mounted integral to the circuit breaker Refer non automatic MDSL breaker application requests to Eaton Cutler Hammer Refer to MDSL current limiter curves for let through and time characteristics The minimum selection provides for the lowest current let through but trip unit settings must be considered to avoid nuisance operation The r...

Page 64: ...arrow frame circuit breaker a single cas sette style using horizontal stabs and horizontal cus tomer bus bar terminals is available Figure 4 4 For the MDS and MDSX standard and double wide circuit breakers three cassette styles all with vertical stabs are available basic standard and universal The stan dard cassette supplies vertical stab terminals only Figure 4 5 The basic cassette omits the copp...

Page 65: ... 3 Typical Drawout Cassette Features Extension Rails Extension Rail Cutout Secondary Plug in Connectors Secondary Terminal Blocks 2 1 4 3 Arc Hood Optional Cell TOC Switch Mounting Optional Key Interlock Mounting Location Grounding Bar 6 5 8 7 1 1 2 2 3 3 4 5 6 7 8 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 66: ...red for all mounting configurations and can also be found in Engineering Data TD01301004E Review carefully for a specific installation I B 2C12060H08 For more information visit www EatonElectrical com Instruction Book Page 57 Effective May 2006 Figure 4 4 Typical MDS Narrow Frame Cassette Horizontal Terminals Figure 4 5 Typical MDS MDSXStandard Cassette Vertical Terminals Shown with MDS Type Arc H...

Page 67: ... 9 Typical MDSL Standard Cassette Rear View Figure 4 10 Typical MDSX Type Drawout Cassette Extension Rails Secondary Plug in Connectors Secondary Terminal Blocks Arc Hood Optional Cell TOC Switch Location Optional Key Interlock Location Grounding Bar Fixed Primary Connections 2 1 4 3 1 1 2 2 3 4 6 5 8 7 5 6 7 8 8 8 8 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 68: ...be repeated here FAILURE TO COMPLY WITH INSTALLATION OF THE FIXED MOUNTED MDSX ARC HOOD ASSEMBLY COULD RESULT IN EQUIPMENT DAMAGE BODILY INJURY OR EVEN DEATH The MDSX fixed mounted breaker is shipped with a fac tory installed arc hood assembly This assembly is required to be installed on the top of the breaker prior to the unit being placed in service 5 2 FIXED CIRCUIT BREAKER DIMENSIONS The stand...

Page 69: ...equipment is subject to a clean and dry environment cleaning is not required as frequently as when the environment is humid with a significant amount of dust and other for eign matter It is recommended that maintenance record sheets be completed for the equipment Careful and accurate doc umentation of all maintenance activities provides a valu able historical reference on equipment condition over ...

Page 70: ...found out of order 6 4 1 FUNCTIONAL FIELD TESTING Before doing any work on drawout type circuit breakers make sure the breaker is levered out to the TEST or DISCONNECT position During the lev ering out and levering in of the circuit breaker be aware of any signs that would indicate that the lev ering process is not working properly If working on a fixed circuit breaker bus systems should be de ene...

Page 71: ...using the motor operator disconnect power to it to prevent automatic recharging Trip the breaker with a trip unit test Verify that the trip indicator pop out button if so equipped is out and then reset it Press the ON pushbutton to manually close the breaker Is the breaker closed Trip the breaker with a trip unit test Verify that the trip indi cator pop out button if so equipped is out and then re...

Page 72: ...aph 6 4 1 WARNING ARC CHUTES MUST ALWAYS BE SECURED PROP ERLY IN PLACE BEFORE A CIRCUIT BREAKER IS INSTALLED IN A CIRCUIT BREAKER COMPART MENT FAILURE TO DO THIS COULD RESULTS IN EQUIPMENT DAMAGE BODILY INJURY OR EVEN DEATH When the inspections are complete position each arc chute down over its respective set of primary contacts and secure in place with the screw removed earlier Torque the arc chu...

Page 73: ...evices The tasks described here do not under ordinary circum stances require any assistance beyond the appropriate instructional material If further assistance is required however contact your Cutler Hammer representative 6 5 1 RATING PLUG REPLACEMENT 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 cir...

Page 74: ...ertical adaptors must be removed Each primary disconnect finger clus ter is removed by loosening the two hex head bolts with a 10 mm wrench These bolts do not have to be com pletely 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 6 8 The current s...

Page 75: ...ining bolt to 40 ft lbs 6 5 3 2 REPLACING TYPE MD CURRENT LIMITERS Type MD current limiters have three holes in each of the end blades for attaching the limiters to the breakers Removal of the limiters is easily accomplished by simply removing the hardware Replacement of limiters should be performed as follows Note Replace the center phase limiter first Step 1 Place the Belleville washer on the he...

Page 76: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 77: ...hat red fault trip indicator button and load current through corresponds to current sensors is out and or fault indicator LED the breaker is lighted when closed on a load current Repeated closing on Wait for circuit breaker and transient in rush current loads to cool before re closing with thermal memory active An overload or fault current Use status and fault condition indicators to help locate a...

Page 78: ...t Cutler Hammer contacts welded service center Circuit breaker makes Closing spring not fully Charge spring manually check no attempt to close with charged check SPRING voltage to electrical operator either local manual or CHARGED indicator replace electrical operator if remote controls springs faulty do not discharge If equipped with undervoltage Unplug undervoltage release release undervoltage r...

Page 79: ...r does not Charging motor supply voltage Check charging motor electrical recharge electrically but absent or too low 85 circuit voltage check under will recharge manually load Charging motor faulty Replace charging motor assembly Drawout circuit breaker Circuit breaker will not fully Circuit breaker ratings do not will not lever in enter cell cell rejection correspond to the cassette code plate re...

Page 80: ...n 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 1 2 and 3 5 Some detailed parts shown in the figures in this manual may only be available as a part of a sub assembly Certain parts may not be available at all for field installa...

Page 81: ...ny such contract The sole source governing the rights and remedies of any purchaser of this equipment is the contract between the purchaser and Cutler Hammer NO WARRANTIES EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF FITNESS FOR A PAR TICULAR PURPOSE OR MERCHANTABILITY OR WARRANTIES ARISING FROM COURSE OF DEAL ING OR USAGE OF TRADE ARE MADE REGARDING THE INFORMATION RECOMMENDATIONS AND DESCRIPTION...

Search results

Summary of Contents for MDN-408

Reviews:

Related manuals for MDN-408

Brands by name

Popular brands

Eaton MDN-408, Instructions For Installation, Operation And Maintenance

Search results

Summary of Contents for MDN-408

Reviews:

Related manuals for MDN-408

Brands by name

Popular brands