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User Manual

MN013016EN

Effective July 2022

Magnum PXR and Power Defense SB low

voltage power circuit breakers user manual

EATON

www.eaton.com

“Toe”

(arcing contact)

“Heel”

(main contact)

Figure 21. Narrow frame (8-finger) moving conductor assembly

“Toe”

(arcing contact)

“Heel” (main contact)

Figure 22. Standard frame (12-finger) moving conductor

assembly

Primary stationary contacts

The primary stationary contact is a combination of two items

(

Figure 23

) . One is a conductive pad mounted on the line conductor

that 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

Breaker

Bottom

Breaker

Front

xxxxxxxx

Line

conductor

Moving contact

fingers

Arc chute

Stationary

main contact

Current

flow

Current

flow

Integral

arc runner

Arcing

contact (toe)

Moving main

contact (heel)

Moving contact

springs

Figure 23. General partial cross-sectional view (shown in

closed position) (not specific to any family/frame)

Содержание Magnum Power Defense SB

Страница 1: ...Effective July 2022 Supersedes January 2022 Magnum PXR and Power Defense SB low voltage power circuit breakers user manual For use in ANSI UL applications Standard frame Narrow frame Double wide fram...

Страница 2: ...mportance of maintenance 43 General 43 Safety precautions 43 General cleaning recommendations 44 Functional tests 44 Procedure 45 Maintenance schedule 46 Inspection procedures 47 Troubleshooting 54 Se...

Страница 3: ...front cover removed 21 Figure 25 Circuit breaker closing springs being manually charged Magnum DS shown 21 Figure 26 Electrical motor operator to charge closing spring 22 Figure 27 Cross section of co...

Страница 4: ...four pole flat terminal pads 42 Figure 71 Fixed narrow frame circuit breaker with available vertical adapter shown 43 Figure 72 CLOSED and OPEN indicators 44 Figure 73 Accessory viewing windows 45 Fig...

Страница 5: ...ation is desired by purchaser regarding the particular installation operation or maintenance of particular equipment contact the local Eaton representative Section 1 Introduction General information T...

Страница 6: ...NDER NO CIRCUMSTANCES SHOULD INTERLOCKS AND OTHER SAFETY FEATURES BE MADE INOPERATIVE AS THIS MAY RESULT IN DEATH BODILY INJURY OR PROPERTY DAMAGE Safety practices To protect personnel associated with...

Страница 7: ...85 kA 240 V 480 V a 85 kA MPN C5N 100 kA 240 V 480 V a 100 kA MPS 850 5N 5A 85 kA 85 kA MPS C50 5N 5A 100 kA 100 kA 6000 MPS 860 6N 6A 85 kA 85 kA MPS C60 6N 6A 100 kA 100 kA a 65kA 600V Table 2 Power...

Страница 8: ...on 2 Receiving handling and installation General information Magnum PXR and PD SB power circuit breakers when supplied as part of an assembly may be shipped already installed in their respective break...

Страница 9: ...circuit breaker before installation do so in its original shipping container Keep the circuit breaker in a clean dry place Ensure there is ample air circulation and heat if necessary to prevent conde...

Страница 10: ...3 Table 33 Basic circuit breaker weights continued Breaker model Weight lb Fixed Drawout Universal cassette Three pole Four pole Three pole Four pole Three pole Four pole MPS 625 150 190 189 240 123 1...

Страница 11: ...ptions that are also incompatible To prevent the insertion of circuit breakers with 1 inadequate interrupting capability 2 with physically incompatible primary disconnects or 3 with an incompatible ph...

Страница 12: ...ils 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 breaker f...

Страница 13: ...imary connections not made Compartment front door Breaker and trip unit testing Primary connection not made Secondary and ground connections made Figure 10 TEST position Circuit breaker side view Rear...

Страница 14: ...d fully to the DISCONNECT or the CONNECT position the levering shaft hits a hard stop do not exceed 25 ft lb of torque or the levering mechanism may be damaged The circuit breaker can be levered with...

Страница 15: ...ration follow the operational procedures outlined in Section 3 for both manually operated and electrically operated circuit breakers Section 3 Circuit breaker description and operation Introduction Ma...

Страница 16: ...adapter i Levering device bearing plate j Padlockable levering device access door k Circuit breaker nameplate a d i j k c b e g f h Figure 15 Typical drawout circuit breaker features front and rear v...

Страница 17: ...EATON www eaton com Figure 17 Typical double wide narrow frame circuit breaker features front and rear view b d c a a Baffled arc chute cover b Secondary disconnect c Front cover d Integral lifting h...

Страница 18: ...abel e Contact status open close f Spring status charged discharged g Manual OPEN button h Manual CLOSE button i Manual charge handle j Optional operation counter not shown k Padlockable levering devi...

Страница 19: ...e another Each pole unit has one primary contact assembly which consists of a moving portion and a fixed portion The exact design configuration depends upon the breaker s frame size Double frame circu...

Страница 20: ...ure 23 One is a conductive pad mounted on the line conductor that functions as the stationary main contact The other is an arc runner also connected to the line conductor The integral arc runner serve...

Страница 21: ...ming 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 acces...

Страница 22: ...nd will be ignored until it is removed and reapplied For electrical closing a Latch Check Switch LCS option is available see page 27 which will block the application of the electrical CLOSE command un...

Страница 23: ...m Current sensors Frame module Trip unit Trip actuator Voltage module PXR 25 only Figure 30 Pictorial diagram of typical current sensing processing and tripping system Microprocessor based trip unit T...

Страница 24: ...calibration and operation The interface circuit for the sensors as well as the configurable relays are mounted in the frame module The Voltage Module converts the line voltage from the top or bottom b...

Страница 25: ...ote trip reset option is available to electrically reset the trip indicator by applying the proper rated control voltage The remote trip reset feature is very useful in applications where direct acces...

Страница 26: ...ntinuous duty coil or a cutoff switch A continuous duty or 100 rated shunt trip can be continuously energized and is useful in applications where it is desired to keep the breaker tripped open Shunt t...

Страница 27: ...t energized to 85 of its supply voltage the circuit breaker cannot be closed electrically or manually Table 8 Table 8 Undervoltage release Control voltages Operational voltage range 85 110 Dropout vol...

Страница 28: ...l Mechanical trip indicator Figure 41 Mechanical trip indicator with associated overcurrent trip switch Motor operator A motor operator is an electric motor assembly internally mounted in the circuit...

Страница 29: ...he circuit breaker and can be viewed through the front cover Figure 44 Operations counter OFF key lock Figure 44 Cover mounted key lock and operations counter Off key lock The off key lock secures the...

Страница 30: ...ters are available for use with the drawout cassette When the drawout circuit breaker is levered from the CONNECT position the shutters automatically close to cover the fixed primary contacts Figure 3...

Страница 31: ...hinged dome shaped waterproof cover attaches to the metal compartment door to provide waterproof protection for the circuit breaker Figure 52 Figure 52 IP55 waterproof cover Magnum DS shown Mechanica...

Страница 32: ...e wiring points Labels Legend OTS Overcurrent trip switch G Source ground input RY Trip unit programmable relay 24V 0V External trip unit power N External neutral current input MM Maintenance Mode ARM...

Страница 33: ...r separated as required 2 With terminal block For those customers preferring to wire to a terminal block terminal blocks with finger proof hinged covers are added to the secondary configuration just d...

Страница 34: ...ser Manual MN013016EN Effective July 2022 Magnum PXR and Power Defense SB low voltage power circuit breakers user manual EATON www eaton com Figure 58 Magnum PXR and PD SB 3 pole wiring diagram PXR 20...

Страница 35: ...ser Manual MN013016EN Effective July 2022 Magnum PXR and Power Defense SB low voltage power circuit breakers user manual EATON www eaton com Figure 59 Magnum PXR and PD SB 4 pole wiring diagram PXR 20...

Страница 36: ...Manual MN013016EN Effective July 2022 Magnum PXR and Power Defense SB low voltage power circuit breakers user manual EATON www eaton com Figure 60 Magnum PXR and PD SB 6 pole ABCABC wiring diagram PX...

Страница 37: ...Manual MN013016EN Effective July 2022 Magnum PXR and Power Defense SB low voltage power circuit breakers user manual EATON www eaton com Figure 61 Magnum PXR and PD SB 8 pole NABCNABC wiring diagram P...

Страница 38: ...EN Effective July 2022 Magnum PXR and Power Defense SB low voltage power circuit breakers user manual EATON www eaton com Figure 62 Magnum PXR and PD SB 6 8 pole wiring diagram PXR 20 25 for alternate...

Страница 39: ...5 AUX 6 AUX 7 AUX 8 AUX 9 AUX 10 AUX 11 AUX 12 LATCH CHECK SWITCH AUX RELAY BUS Future M Motor Cut Off Switch LEV IN Door Switch when required Spring Charging Motor Operator SC MOTOR MOTOR M SW Common...

Страница 40: ...ped with automatic primary disconnects Figure 65 The cassette provides all of the necessary interfaces to the drawout circuit breaker including automatic primary and secondary connections For the narr...

Страница 41: ...s user manual EATON www eaton com Figure 66 Typical drawout cassette features a Extension rails b Extension rail cutout c Secondary plug in connector d Secondary terminal blocks e Arc hood f Option ce...

Страница 42: ...rawout circuit breaker dimensions The Magnum PXR and PD SB drawout circuit breaker connects to the fixed primary stabs of the drawout cassette through the primary finger clusters attached to the rear...

Страница 43: ...A AB4 and the National Fire Protection Association NFPA standard NFPA 70B If further assistance or information is required please contact Eaton Electrical Services and Systems at 1 877 386 2273 1 877...

Страница 44: ...c Breaker frame size in amperes d Interrupting capacity rating e Factory equipped accessories a b c d e Before doing any work on drawout type circuit breakers confirm that the breaker is levered out t...

Страница 45: ...three times Trip unit overload functional test An overload simulation for trip unit testing can be achieved by using the Power Xpert Protection Manager PXPM software Testing prior to startup should a...

Страница 46: ...re some conditions that may require inspection frequency to be increased Table 13 Increased frequency conditions Factor Condition limits Recommended action Operating conditions High cycling Greater th...

Страница 47: ...the primary contacts Each arc chute is held in place by one top inserted screw Procedure 1 Remove arc chute screws and all arc chutes from the arc chamber 2 Turn each arc chute upside down and visual...

Страница 48: ...dividual contact fingers to a narrow side to side ledge inside the arc chamber The ledge is actually part of the arc chamber When the circuit breaker is closed and the contacts are in good condition t...

Страница 49: ...stic parts will require thread locking compound such as Loctite 242 All nicked wiring should be replaced or repaired in accordance with accepted industry practices 2 Ensure that the torque values of t...

Страница 50: ...user manual EATON www eaton com Figure 80 Breaker mechanism lubrication Figure 81 Pole shaft lubrication Figure 82 Drawout system lubrication not applicable to fixed mount breakers Figure 83 Drawout...

Страница 51: ...n that the retaining screw is in the proper position and does not deform the end plates on the primary disconnects Secondary disconnect inspection Table 21 Pre inspection conditions Device Position of...

Страница 52: ...pened depress the CLOSE pushbutton The breaker should not close ote N Remove the Undervoltage Release for the remainder of the interlock testing if installed b For drawout breakers lift the levering i...

Страница 53: ...following OPEN pushbutton is depressed Shunt trip electrical External trip interlock cassette UVR being de energized electrical Trip unit signal overcurrent etc Rotating the interlock wire form For b...

Страница 54: ...terminal screws Motor continuously runs Contact Eaton Electrical Services Systems Table 24 Contact closing Problem Possible root cause Actions Breaker will not close Breaker is already closed with fla...

Страница 55: ...on cover blocking access to OPEN pushbutton Remove cover Other unidentified causes Contact Eaton Electrical Services Systems Table 26 Levering in out drawout applications only Problem Possible root ca...

Страница 56: ...Form Interlock __________ Trip Free Interlock ____________ Levering In Door Interlock __________ Interlocking Trip Indicator __________ Key Interlock __________ Cable Rod Interlock _______________ MA...

Страница 57: ...ker Catalog Number __________________________________________________ Trip Unit Cat Number________________________________________ Ground Fault Settin GFPU _____ Long Delay Time LDT _____ Instantaneou...

Страница 58: ...d in what form For additional information visit www eaton com magnumpxr Disclaimer of warranties and limitation of liability The information recommendations descriptions and safety notations in this d...

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