POWER-ZONE 4

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POWER-ZONE 4Low Voltage Metal-Enclosed DrawoutSwitchgear with MASTERPACT NWLow Voltage Power Circuit BreakersClass 6037CONTENTSSchneider Electric BrandsDescriptionPageProduct Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5General and Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Technical Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Suggested Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

POWER-ZONE 4 SwitchgearProduct DescriptionSECTION CONTENTSSECTION 1—PRODUCT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Equipment Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Equipment Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7311/99 1999 Schneider Electric All Rights Reserved

POWER-ZONE 4 SwitchgearProduct Description4 1999 Schneider Electric All Rights Reserved11/99

POWER-ZONE 4 SwitchgearIntroductionSECTION 1—PRODUCT DESCRIPTIONIntroductionPOWER-ZONE 4 low voltage metal-enclosed drawout switchgear is designed to provide superiorelectrical distribution, protection, and power quality management for the entire facility. The primecomponent of the switchgear is the MASTERPACT NW ANSI rated circuit breaker. POWER-ZONE 4switchgear is designed to maximize the functionality of the MASTERPACT NW circuit breaker, which, inturn, delivers maximum uptime, system selectivity, ease of maintenance and circuit protection. All of thisin the smallest footprint available for low voltage drawout switchgear.Features and Benefits POWER-ZONE 4 is designed and built toANSI C37.20.1 and is listed to UL 1558. MASTERPACT NW drawout low voltagepower circuit breakers are designed andbuilt to ANSI C37.13 and C37.16.Listed to UL1066. Short-circuit current rating up to 200 kAwithout fuses. High short-time withstand ratings up to100 kA for 30 cycles.Through-the-Door Access Family of field installable andupgradeable MICROLOGIC trip unitswith optional POWERLOGIC datacommunications features. Smallest equipment footprint available inthis product class. Front access to control andcommunications wire connections. Bolted copper bus provided as standard(up to 5000 A maximum). Large rear cable compartment pull areaallows maximum room for power cables. Bus provision for future equipmentexpansion.Circuit Breaker Compartmentwith Secondary Horizontaland Vertical Wireways System designed for maximum uptimewith low maintenance. Modular circuit breaker design for easyaddition of control accessories.POWER-ZONE 4 SwitchgearPOWERLOGIC SystemManager SoftwareFamily of MICROLOGIC Trip UnitsFamily of MASTERPACT NW Circuit Breakers511/99 1999 Schneider Electric All Rights Reserved

POWER-ZONE 4 SwitchgearFeatures and BenefitsCompartmentalizationStructures are compartmentalized and are built with barriers as required by ANSI C37.20.1. Thestructure has large conduit space within the main and feeder sections.UL ListingPOWER-ZONE 4 switchgear is designed and engineered to comply with UL1558 requirements.MASTERPACT NW circuit breakers are UL1066 listed. A UL label can be affixed where UL coverageexists for all component material, parts, and devices in a switchgear section.Functional CapacityHigh current carrying capacity frame sizes and high withstand rating make the MASTERPACT NWcircuit breaker ideal for application on today’s high capacity distribution systems.Maximum UptimeDrawout construction allows quick and simple replacement of circuit breaker elements. If anemergency occurs, circuit breakers may be removed from low-priority circuits and re-installed toserve high-priority circuits.Ease of MaintenanceMASTERPACT NW circuit breakers provide disconnecting and overload protection for the circuit itcontrols. Each is contained in an individual compartment and can be easily isolated from the energizedcircuit and withdrawn from the compartment for quick inspection, maintenance, or replacement. Theentire switchgear or any other feeder circuits need not be shut down during this operation, thusminimizing production downtime.Auxiliary Instrument CompartmentsOptional control power transformers, meters, and other control devices can be mounted in the auxiliaryinstrument compartments. These compartments are furnished with hinged doors for easy access.Secondary Horizontal and Vertical WirewaysThe secondary wiring design allows for front access to circuit breaker control and communicationswiring without removing the circuit breaker from its compartment. The vertical wireway is located on theright side of the circuit breaker for easy access and wiring installation. The horizontal wireway is locateddirectly above the circuit breaker, providing direct access to control and communication terminations.ANSI Interrupting and Short-Time (Withstand)POWER-ZONE 4 switchgear with MASTERPACT NW circuit breakers has the highest interrupting andshort-time (withstand) ratings for low voltage switchgear in the smallest physical size. The elimination oflimiter fuses for high interrupting circuit breakers reduces space and cost. The ANSI rated circuitbreaker’s improved coordination with downstream devices increase system uptime.Through-the-Door ConstructionMASTERPACT NW circuit breakers provide clear access to all circuit breaker controls, indicators, andtrip unit functionality without opening the compartment door. Circuit breaker racking is also achievedwith the compartment door closed.Disconnecting ContactsThe main disconnecting contacts (power plug-on fingers) on the rear of the circuit breaker are springloaded and self-aligning to ensure positive electrical contact when the circuit breaker is in the connectedposition. The secondary disconnecting contacts are located on the top front of the circuit breakerelement and are used for connecting the accessories to the control power source, other control circuits,or communication circuits.6 1999 Schneider Electric All Rights Reserved11/99

POWER-ZONE 4 SwitchgearStandards and RatingsMICROLOGIC Enhanced FunctionalityA new family of MICROLOGIC electronic and programmable trip units provide you with a choice ofexpanded information, power quality readings, and communication capabilities. MICROLOGIC trip unitscan be integrated into the optional POWERLOGIC system.POWERLOGIC Monitoring SystemPOWER-ZONE 4 switchgear is available with the POWERLOGIC metering, data acquisition, and controlsystem. The optional POWERLOGIC system is used in addition to, or in lieu of, the Type A, Type P, andType H MICROLOGIC trip units for the MASTERPACT NW circuit breaker. POWERLOGIC functions areincluded in MICROLOGIC high-end trip units. Several highly accurate circuit monitors are available towork in conjunction with the POWERLOGIC System Manager Software to manage and control yourelectrical distribution system.Equipment StandardsAll POWER-ZONE 4 switchgear is 100% rated; assembled and tested in an ISO 9001 facility toapplicable standards including:StandardDescriptionANSI C37.20.1Metal-enclosed low voltage circuit breaker switchgearANSI C.37.51Testing of metal-enclosed low voltage ac circuit breaker switchgearNEMA SG-5Power switchgear assembliesCAN/CSA C22.2 No. 31-M89Switchgear assembliesUBC and CBCZone 4 seismic applicationsUL 1558Switchgear assembliesAll MASTERPACT NW circuit breakers are 100% rated; assembled and tested in an ISO 9001 facility toapplicable standards including:StandardDescriptionANSI C37.13Low voltage ac power circuit breakers used in equipmentANSI C37.16Preferred rating, related requirement and application recommendations for low voltage powercircuit breakers and ac power circuit breakersANSI C37.17Trip devices for ac and general-purpose dc low voltage power circuit breakersANSI C37.50Testing of low voltage ac circuit breakersNEMA SG-3Low voltage circuit breakersUL 1066Low voltage circuit breakersEquipment RatingsApplication Voltage SystemsAmpacities600 Vac Maximum1600 A–5000 A(main circuit breaker or main lugs only)1Ø3W, 3Ø3W, 3Ø4W50/60 HzShort-Circuit Current Ratings240 V480 V600 VShort-Time Withstand Ratings42 kA42 kA42 kA42 kA65 kA65 kA65 kA65 kA85 kA85 kA85 kA85 kA200 kA200 kA130 kA100 kA (maximum)711/99 1999 Schneider Electric All Rights Reserved

POWER-ZONE 4 SwitchgearStandards and Ratings8 1999 Schneider Electric All Rights Reserved11/99

POWER-ZONE 4 SwitchgearGeneral and Application InformationSECTION CONTENTSSECTION 2—GENERAL AND APPLICATION INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13NEMA Type 1 Indoor Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13NEMA Type 3R Non-Walk-In Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14NEMA Type 3R Walk-In Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Control and Communications Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Control Conduit Entrances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Horizontal Wireway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Vertical Wireway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Control and Communications Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Rear Cable Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Bus Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Auxiliary Instrument Compartments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Auxiliary Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Key Locks and Padlocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Moving and Handling Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Lifter Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Traveling Lifter Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Floor Crane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20MASTERPACT NW Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Through-the-Door Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Circuit Breaker Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Interruption and Short-Time (Withstand) Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Circuit Breaker Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Circuit Breaker Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Circuit Breaker Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Two-Step Stored Energy Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Circuit Breaker Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Circuit Breaker and Equipment Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26MICROLOGIC Trip Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Basic Trip Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Type A (Ammeter) Trip Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Type P (Power Metering) Trip Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Type H (Harmonics) Trip Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28POWERLOGIC System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29MICROLOGIC Trip Unit System Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29System Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Circuit Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31911/99 1999 Schneider Electric All Rights Reserved

POWER-ZONE 4 SwitchgearGeneral and Application Information10 1999 Schneider Electric All Rights Reserved11/99

POWER-ZONE 4 SwitchgearGeneral and Application InformationSECTION 2—GENERAL AND APPLICATION INFORMATIONPOWER-ZONE 4 switchgear with MASTERPACT NW circuit breakers provide the necessary switchgearsolutions in an industrial environment. The switchgear is designed for ease of use, system selectivity,system uptime, and low maintenance. The switchgear is easy to operate and maintain because of thetechnological advances in communications, power quality monitoring, and measuring capabilities.The switchgear with drawout MASTERPACT NW circuit breakers provide overload, short-circuit, andground fault protection for circuits up to 600 volts. All trip unit and circuit breaker functions areoperational from the front without opening the circuit breaker compartment door. MASTERPACT NWcircuit breakers carry the highest interruption ratings without fuses and require minimal space.All MASTERPACT NW circuit breakers can be equipped with MICROLOGIC electronic andprogrammable trip units to provide you with a choice of expanded information, power qualitymeasurement, protection, and communication capabilities. Additionally, the optional high-endMICROLOGIC trip units are compatible with the optional POWERLOGIC system.The optional POWERLOGIC data communications system can be used in lieu of or in addition toMICROLOGIC trip units. The POWERLOGIC system uses highly accurate circuit monitors that work inconjunction with its System Manager Software to manage and control your electrical distribution system.POWER-ZONE 4 switchgear is commonly found as the electrical service in the following applications: Chemical Refinery Manufacturing Heavy Assembly Plants Large Warehouses Semi-conductor Manufacturing Textile Mills Large Office Buildings University Facilities Airports Water Treatment FacilitiesStructureThe switchgear assembly is composed of vertical sections arranged according to customerrequirements. Each section is divided into a maximum of four compartments. One or more of thesecompartments can be used as an auxiliary instrument compartment containing potential transformers,meters, relays, and control devices.A horizontal secondary wireway, containing the accessory terminal blocks is directly above each circuitbreaker. A spacious vertical wireway is on the right side of each circuit breaker compartment that allowswire routing through the switchgear.1111/99 1999 Schneider Electric All Rights Reserved

POWER-ZONE 4 SwitchgearStructurePOWER-ZONE 4 switchgear offerscompartmentalized construction. Eachvertical section consists of threecompartments: a front compartment(including secondary wireway), a buscompartment, and a rear cablecompartment. The front compartment isdivided into a maximum of fourcompartments that can containMASTERPACT NW circuit breakers orauxiliary equipment. If desired, allcompartments may be used for auxiliaryequipment, circuit breakers, or acombination. The circuit breaker ispositioned to allow ample room for controland communications wiring. Hinged doorson the auxiliary instrument compartmentare available for mounting meters, relays,or other control equipment when it doesnot contain a circuit breaker. A circuitmonitor display may be mounted on thehinged door of a compartment containing amain circuit breaker.Rear cablecompartmentBuscompartmentBase channelSwitchgear (Side View)The examples below depict a typical POWER-ZONE 4 switchgear assembly.Removabletop plateWiring troughAuxiliary instrumentcompartmentsThrough-thedoor circuitbreaker accessPOWERLOGIC circuitmonitor display (optional)Circuit breakercompartmentsRemovableside panel(not shown)Removable hingedrear door withlatches (not shown;optional)Family ofMICROLOGIC trip unitsQuarter turndoor latchesHinged doorsPilot Lights (optional)Removablebottom plate(optional)Standard ANSI #49 graycorrosion resistant finishSwitchgear (Rear View)Switchgear (Front View)12 1999 Schneider Electric All Rights Reserved11/99

POWER-ZONE 4 SwitchgearEnclosuresEnclosuresNEMA Type 1 Indoor EnclosuresThe standard POWER-ZONE 4 switchgear enclosure is NEMA Type 1, general purpose. NEMA Type 1enclosures are dead front, metal-enclosed structures. All sheet steel parts of the enclosure, inside andout, are painted using an electro-deposition process.POWER ZONE 4 Switchgear, NEMA Type 1, Indoor EnclosureStandard Features:———————Available Options:Secondary wiring areasRemovable, steel top plates over conduit entranceHinged front doors with latchesCircuit breaker or instrument compartmentBus compartmentCable compartmentCapability for future expansion— Two piece removable side and back plates— 1 1/2-inch high base channels— Electro-deposition paint process on structural parts— ANSI #49 paint color— Customer nameplates for each compartment— Vertical bus barriers— Strip heaters in circuit breaker, bus,and cable compartments— Overhead circuit breaker liftingdevice or floor crane— Gasketing around doors andbetween sections— Filtering of doors and vents— Lockable hinged rear doors— Lockable front hinged doors— 18-inch high pull box— Bottom plates— Rodent barriers1311/99 1999 Schneider Electric All Rights Reserved

POWER-ZONE 4 SwitchgearEnclosuresPOWER-ZONE 4 switchgear is also available in a NEMA Type 3R walk-in POWER ZONE centerenclosure for outdoor installation. A non-walk-in NEMA Type 3R enclosure is also available.NEMA Type 3R Non-Walk-In EnclosuresStandard Features:— Strip heaters in circuit breaker and bus compartments— Front and rear lockable equipment doors with threepoint latching and filtered openings for ventilation— Removable gasketed steel cover plates overconduit entrance— Angled roof to deter water buildupAvailable Options:— Overhead circuit breaker lifting device or mobile floorcrane to handle circuit breaker— Top entry/exit for incoming and outgoing cables— Capability for future expansion— Interior and exterior lighting and convenience outletsPOWER ZONE Center, NEMA Type 3R,Non Walk-In Outdoor EnclosureNEMA Type 3R Walk-In EnclosuresStandard Features:— Front aisle with steel entrance door equippedwith panic hardware— Lockable hinged rear doors— Interior fluorescent lighting— Three-way light switch and convenience outletsnear the entrance door— Strip heaters in circuit breaker and buscompartmentsPOWER ZONE Center, NEMA Type 3R, Walk-In Outdoor Enclosure— Overhead circuit breaker lifting device (travelinglifter assembly)Available Options:— Removable gasketed steel cover plates overconduit entrance— Extended aisle for additional work space— Exhaust fan ventilation/inside temperature control— One-piece construction for ease of installation— Inside emergency lighting— Wall-mounted ac distribution panel— Exterior lightingNOTE: NEMA Types 4, 4X, 7, and 9 are also available.— Top entry/exit for incoming and outgoing cables14 1999 Schneider Electric All Rights Reserved11/99

POWER-ZONE 4 SwitchgearControl and Communications WiringControl and Communications WiringControl and communication wiring is installed andconnected from the front of the switchgear. Thesecondary wiring design allows for circuit breakercompartment wiring without removing the circuitbreaker from its compartment.Control Conduit EntrancesThe control wiring conduit entrance is in boththe top and bottom of each section formaximum flexibility.Punchable,removableplateA removable top plate (4-inch by 5-inch) canbe punched easily; up to four individual3/4-inch control conduits per section.Top Control Conduit EntranceTwo bottom conduit entrances in each circuitbreaker compartment permit cables to exitthrough the bottom of the compartment.Two bottomconduitentrancesBottom Control Conduit EntrancesHorizontal WirewayThe secondary horizontal wireway (see page 16) is directly above each circuit breaker compartment,allowing easy access to finger-safe secondary terminals. Each secondary terminal is dedicated to aspecific function, allowing standardized wiring.The secondary disconnecting contacts are on the top front of the circuit breaker element and connectthe accessories to the control power source or other control circuits. These contacts are in theconnected position when the circuit breaker is in the connect and test positions.Vertical WirewayThe vertical wireway is on the right side of the circuit breaker for quick and easy wiring installation.Control and Communications TerminalsAll accessory terminals are on a connecting block on the top front of the circuit breaker cradle and areaccessible from the front, even with the circuit breaker in the test or disconnect position. This isparticularly useful for field inspection and modification. The field-installable electrical accessories areUL Listed.1511/99 1999 Schneider Electric All Rights Reserved

POWER-ZONE 4 SwitchgearControl and Communications econdaryterminal blockSecondarydisconnectingterminalsSecondary Wiring SystemStandard Features:— Control wires in wiring trough above thecircuit breaker compartment— Locking pull apart terminalblocks at shipping splits— Originates directly from the circuit breakerwithout the use of an intermediate terminalblock for factory and customer wiring— Sleeve type “destination”wire markings— Snap-in wire tie provisions— Grommeted holes betweencircuit breaker compartments— Cage clamp terminal blocks locked directlyon the circuit breaker cradleAvailable Options:— Control wiring AWG #14 SIS— Metering CT wiring AWG #10 SIS— Ring tongue control wiring— Communications wiringAWG #22 shielded16 1999 Schneider Electric All Rights Reserved11/99

POWER-ZONE 4 SwitchgearRear Cable CompartmentRear Cable CompartmentThe rear cable compartment is behind the bus compartment. It provides room for rear access cableinstallation. Silver plated copper load bars extend from the load side of the circuit breaker stationaryconnecting contacts into the cable compartment. Cable terminations on the load bars permit cables toexit through either the top or bottom of the vertical sections.Mechanical lugcableterminationsStandard Features:— Mechanical lugs provided forcustomer connections— Largest conduit area in this product class— Two-piece removable rear covers(not shown)— 3/0–750 kcmil lugsAvailable Options:— Anderson compression lugs— Cable supports— Hinged full height rear door with padlockprovisions— Load connection to I-LINE buswayBuscompartmentbarriers(optional)— 18-inch pull boxMechanical luggroundterminationsRear Cable CompartmentCompressionlug cableterminations(optional)Mechanical cable lugs arestandard for customer cableconnections. Optionalcompression lugs are availablewith POWER-ZONE 4 switchgear.Optional cable supports(not shown) provide additionalassistance in customer wiring.Load barsMechanical Lugs1711/99 1999 Schneider Electric All Rights Reserved

POWER-ZONE 4 SwitchgearBus CompartmentBus CompartmentThe bus compartment contains the horizontal and vertical bus, and is between the circuit breakercompartment and the cable compartment. The bus compartment is separated from the circuit breakercompartment with grounded steel barriers. The optional side and rear barriers isolate the buscompartment from the rear cable compartment. In addition, service entrance barriers provide isolationaround the incoming lines to meet UL and NEC requirements. Optional insulated bus aids in protectingthe bus in harsh environments.On four-wire systems, a neutral bus extends the length of the line-up and includes taps for the neutralcables in each vertical section. Feeder circuit breaker neutral sensors (current transformers) areprovided on these taps when ground fault protection is supplied. A removable link to the ground bus isfurnished, but not connected in the main vertical section for grounded, four-wire systems. The groundbus is a plated copper bus bar and is bolted to the rear bottom of the cable compartment and extendsthe entire length of the switchgear.All bus joints use a minimum of two grade-5 bolts and are secured with conical-type spring washers formaximum joint integrity. Bus sizing is based on ANSI/IEEE C37.20.1 continuous current test criteria.Standard bus is plated copper and is fully rated. All vertical and cross bus ratings in POWER-ZONE 4switchgear are based on a standard temperature rise of 149 F (65 C) above a maximum ambient airtemperature of 104 F (40 C).Standard Features:Neutralbus— Silver plated copper bus bars— Up to 5000 A continuous, 100% rated— All bus bars are sized for fullsystem capacity— Minimum of two grade-5 bolt conicalwasher jointsVerticalbus riser— Sleeve type insulated runbacksAvailable Options:— Bus compartment barriers— Side barriers in cable compartment— Neutral bus center for easy terminations— Tin plated copper busNeutral bus— Bus sized to 1,000 amps/in 2— Full insulated bus-sleeve type insulatedwith boots over jointsHorizontalcross busNeutral groundfault sensorNeutral busGround busBus Compartment (Rear View)Bus Compartment (Side View)18 1999 Schneider Electric All Rights Reserved11/99

POWER-ZONE 4 SwitchgearAuxiliary Instrument CompartmentsAuxiliary Instrument CompartmentsAuxiliary instrument compartments are the same size as circuit breaker compartments. Typical auxiliaryinstrument compartments contain control power transformers, control components, meters, relays, andother optional devices. Circuit monitor displays and other metering devices can be mounted on the door.Typical Auxiliary Instrument CompartmentAuxiliary SectionsOptional, full-height, auxiliary sections with hinged front doors are available that can be bolted tofeeder and main switchgear sections. In addition, auxiliary sections can be provided with through busas needed.Key Locks and PadlocksOptional key locks and padlocks can be provided for the door latches on circuit breaker compartments,auxiliary instrument compartments, auxiliary sections, and the rear doors on switchgear sections.Moving and Handling OptionsPOWER-ZONE 4 switchgear enclosures are designed to withstand the rigors of lifting, handling,shipping, and setting into place; either as a single unit or as multiple units assembled togetherwithin a shipping group. Maximum sizes are determined by shipping dimensions required fortransportation on common carrier trucks and movement through standard equipment locationopenings (door and portals).1911/99 1999 Schneider Electric All Rights Reserved

POWER-ZONE 4 SwitchgearMoving and Handling OptionsLifter BarThe circuit breaker lifter bar is used with both3-pole and 6-pole MASTERPACT NW circuitbreakers. The size of the circuit breakerdetermines whether the inside or outsidenotches on the lifter bar will be used.Adjustable Circuit Breaker Lifter BarTraveling Lifter AssemblyA rail-mounted traveling type circuit breaker lifting device is optionally available with indoor typeswitchgear. The lifting device is available on enclosures with drip hoods and is capable of liftingMASTERPACT NW circuit breakers into and out of any compartment. The circuit breaker is raised orlowered by manually cranking the hoisting mechanism. The traveling lifter assembly is supplied withoutdoor walk-in enclosures.CarriageassemblyWinchmechanismWinch hookLifting hookRail-mounted Circuit Breaker LIfting DeviceFloor

ANSI C37.20.1 and is listed to UL 1558. MASTERPACT NW drawout low voltage power circuit breakers are designed and built to ANSI C37.13 and C37.16. Listed to UL1066. Short-circuit current rating up to 200 kA without fuses. High short-time withstand ratings up t

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