Eaton Magnum Air MWI-408 User Manual Download Page 1

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Double-wide Fixed

Standard Frame Fixed

User Manual Magnum

1812.900A

Magnum LV-Air Circuit Breaker

Narrow Frame Fixed

Summary of Contents for Magnum Air MWI-408

Page 1: ...Double wide Fixed Standard Frame Fixed User Manual Magnum 1812 900A Magnum LV Air Circuit Breaker Narrow Frame Fixed...

Page 2: ...chgear installations such as setting up the connecting of cables operation inspection and maintenance must only be carried out by persons authorised to do so Administrative data Version number A Date...

Page 3: ...assembly 20 3 3 Pole units 20 3 3 1 Primary moving contacts 20 3 3 2 Primary stationary contacts 21 3 4 Operating mechanism 22 3 4 1 Manual operation 22 3 4 2 Electrical operation 23 3 4 3 Anti pump...

Page 4: ...ect 46 6 4 What to inspect 47 6 4 1 Functional field testing 47 6 4 2 Arc chute inspection 48 6 4 3 Primary contact inspection 49 6 5 Circuit breaker modifications and changes 50 6 5 1 Rating plug rep...

Page 5: ...reakers use a rigid frame housing of engineered thermoset composite resins which has high strength structural properties excellent dielectric characteristics and arc tracking resistance The drawout Ma...

Page 6: ...ip units Magnum circuit breaker accessory items are discussed briefly in this manual Field installation instructions for such items however are covered in individual instruction leaflets specific to t...

Page 7: ...E40 E4N 65 85 100 1 65 85 100 150 2 65 NA 85 65 100 85 150 100 5000 MWI 850 85N MWI C50 C5N MWI E50 E5N 85 100 150 2 85 65 100 85 150 100 6300 MWI 863 86N MWI C63 C6N MWI E63 E6N 85 100 150 2 85 65 10...

Page 8: ...ghly trained in the operation of the circuit breaker and how it interfaces with the assembly in which it is used In addition the individual should have knowledge of the connected loads For the purpose...

Page 9: ...sting and or installation When ready to inspect and install the Magnum circuit breaker carefully remove the banding straps and lift off the cardboard box Remove any additional packing material and int...

Page 10: ...ers once removed from their shipping containers should be visually inspected for any obvious damage The current rating of the rating plug installed in the trip unit should match the current rating of...

Page 11: ...side rejection plate and key pattern must be assembled and installed by the switchboard builder Figure 2 2 Rear View Showing Current Sensor Rating Through Viewing Window CAUTION DO NOT DISABLE REJECTI...

Page 12: ...proceed with the rest of the circuit breaker installation From Table 2 2 make a pin location comparison Stop nuts should be torqued to 8 10 Ft Lb Figure 2 4 Cassette Rejection Interlock Pin Positioni...

Page 13: ...e or Inspection Position Figure 2 5 Remove Position Only Ground Connection Made Breaker Still Behind Door Typical Storage Position Figure 2 6 Disconnect Position Breaker and Trip Unit Testing Primary...

Page 14: ...reaker is held trip free Begin by rotating the levering in screw to the full counterclockwise DISCONNECT position Close the compartment door and begin levering the breaker into its different positions...

Page 15: ...econdary connection devices are mounted at the top front of the circuit breaker The fixed circuit breaker frame has two mounting feet one on each side to permit the fixed circuit breaker to be securel...

Page 16: ...t breakers are available from the factory with several different phase sequences distinguishable by the sixth character in the model number Figure 1 3 The phase sequence is also labeled on the rear of...

Page 17: ...Chute Cover 2 Secondary Disconnect 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...

Page 18: ...Rear Views 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 M...

Page 19: ...n 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...

Page 20: ...eaker s frame size Double wide circuit breakers use two pole units and arc chute assemblies connected mechanically and electrically in parallel to form each phase Figure 3 5 Typical Magnum Constructio...

Page 21: ...e 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...

Page 22: ...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 w...

Page 23: ...arged and latched the close command will be ignored until it is removed and reapplied Figure 3 12 Electrical Motor Operator to Charge Closing Spring 1 Electrical Motor Operator For electrical closing...

Page 24: ...icroprocessor based trip unit Magnum circuit breakers use any one of a family of Digitrip RMS trip units whose main features are summarized in Table 3 1 Versions of the trip unit without the i meet th...

Page 25: ...vels and the tripping energy are derived from the current sensors integrally mounted in the circuit breaker Control power is required to operate certain optional display and metering functions Table 3...

Page 26: ...t of the rating plug clearly indicates that the rating plug and sensors must have the same rating 2 It determines the maximum instantaneous setting which is a function of the current sensor rating 3 W...

Page 27: ...eplate Figure 3 17 It operates by releasing and popping out any time the circuit breaker trips due to to an overcurrent condition Note that the mechanical trip indicator will not prevent the breaker f...

Page 28: ...ory Figure 3 20 illustrates line side voltage taps Figure 3 20 Line Side Voltage Tap for 1150 Trip Unit Labels Legend OTS Overcurrent Trip Switch UVR Undervoltage Release ATR Automatic Trip Relay 520M...

Page 29: ...tors male and female just described in the two previous paragraphs The plug in connectors are joined and attached to the top portion of the circuit breaker The customer can plug secondary wiring with...

Page 30: ...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...

Page 31: ...NE INTERLOCKING APPLICATIONS A JUMPER FROM B 8 TO B 9 IS REQUIRED 5 ON THREE POLE BREAKERS ONLY HAVING GROUND FAULT FUNCTIONALITY A JUMPER INSTALLED FROM B 6 TO B 7 WILL ENABLE SOURCE GROUND FAULT SEN...

Page 32: ...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...

Page 33: ...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...

Page 34: ...LSE WILL OCCUR WHEN THE MECHANISM IS CHARGED AND RESET LCS OPEN VOLTAGE MUST BE REMOVED AND REAPPLIED TO THE SPRING RELEASE FOR SUBSEQUENT OPERATION 4 TO PROVIDE SELECTED TIME DELAYS FOR SHORT TIME AN...

Page 35: ...LSE WILL OCCUR WHEN THE MECHANISM IS CHARGED AND RESET LCS OPEN VOLTAGE MUST BE REMOVED AND REAPPLIED TO THE SPRING RELEASE FOR SUBSEQUENT OPERATION 4 TO PROVIDE SELECTED TIME DELAYS FOR SHORT TIME AN...

Page 36: ...windows located in the right front of the circuit breaker Figure 3 31 All four are plug in type and can be factory installed or field installed The four Plug In accessories are Shunt Trip ST Spring Re...

Page 37: ...the anti pump feature of the electrical charging closing system Figure 3 34 Spring Release with Optional Latch Switch Table 3 4 Spring Release Ratings Control Voltages Operational Voltage Range 70 110...

Page 38: ...urrent trip switch to operate The overcurrent trip switch has 2a 2b Form C contacts Table 3 6 The status of the contacts changes when the trip indicator pops out This permits the switch to be used as...

Page 39: ...408 528 Vac 144 288 Vac 400 VA 10 VA 70 600 Vac 2 510 660 Vac 180 360 Vac 400 VA 10 VA 70 1 Required for 200 ms 2 Required for 400 ms Table 3 6 Auxiliary Switch Overcurrent Trip Switch and Cell Switc...

Page 40: ...eaker and can be viewed through the front cover Figure 3 41 The customer supplies the key lock The provisions available are for Kirk Castell or Ronis Figure 3 41 Cover Mounted Key Lock and Operations...

Page 41: ...rs in Closed Position Figure 3 45 Safety Shutters in Open Position Door Escutcheon The door escutcheon is a molded frame used to seal the space between the circuit breaker and the compartment door cut...

Page 42: ...n 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 orientation of the breakers Mechanical in...

Page 43: ...nd secondary connections For the IEC circuit breaker a cassette style using horizontal stabs and horizontal customer bus bar terminals is available as standard Figure 4 3 The cassette terminal connect...

Page 44: ...3 Secondary Plug in Connectors 4 Secondary Terminal Blocks 5 Arc Hood 6 Optional Cell TOC Switch 7 Optional Key Interlock 8 Earthing Bar 9 Open Safety Shutters 10 Primary Terminals Rear View Figure 4...

Page 45: ...llation of a fixed circuit breaker was discussed in Section 2 If necessary review that information since it will not be repeated here 5 2 Fixed circuit breaker dimensions The standard fixed circuit br...

Page 46: ...record sheets be completed for the equipment Careful and accurate documentation of all maintenance activities provides a valuable historical reference on equipment condition over time 6 2 General clea...

Page 47: ...YPE CIRCUIT BREAKERS MAKE SURE THE BREAKER IS LEVERED OUT TO THE TEST OR DISCONNECT POSITION DURING THE LEVERING OUT AND LEVERING IN OF THE CIRCUIT BREAKER BE AWARE OF ANY SIGNS THAT WOULD INDICATE TH...

Page 48: ...erify closing by noting the state of the indicating flag Charge the breaker mechanism springs either using the charging handle or the motor operator If using the motor operator disconnect power to it...

Page 49: ...igure 6 2 A contact wear indicator is provided for each primary contact and indicates whether or not the contact should be replaced Inspection of the contacts using the contact wear indicators is cond...

Page 50: ...devices Their installation is covered by separate instruction leaflets dedicated to the individual devices The tasks described here do not under ordinary circumstances require any assistance beyond t...

Page 51: ...crewdriver to tighten the M4 screw and secure the rating plug in the trip unit The maximum torque on the mounting screw is 15 in oz Close the rating plug door 6 5 2 Current sensor replacement NOTICE R...

Page 52: ...them off of the terminals and unplugging the wiring plugs from the sensors Figure 6 8 Install new current sensors by connecting the wiring plugs to the sensors and sliding the sensors over the termina...

Page 53: ...ake sure shunt trip is seated and retainer snapped into place Check for shunt trip motion replace shunt trip if faulty Circuit breaker cannot be opened remotely but can be opened locally Secondary con...

Page 54: ...s Levering in screw n ot in fully DISCONNECT position at insertion Rotate levering in screw counterclockwise to DISCONNECT position then insert breaker fully into cassette Levering in screw in DISCONN...

Page 55: ...ctorial 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...

Page 56: ...44 0 8700 540 333 E mail ukcommorders eaton com Eaton Electric NV PO Box 23 7550 AA Hengelo The Netherlands Customer Support Centre Tel 31 0 74 246 7066 Fax 31 0 74 246 7070 E Mail c heuropesupport ea...

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Eaton Magnum Air MWI-408, User Manual

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