Effective August 2018 Application note 3148 Supersedes ...

1 Quik-Spec Coordination Panelboard (QSCP)BUSSMANNSERIESA pplication note 3148 Effective August 2018 Supersedes September 2017 Introduction ..2 Features/benefits ..2 QSCP Overview .. 3-4 Selective coordination made easy ..5 Comparing fusible branch circuit panelboards ..6 QSCP Short-Circuit Current Ratings (SCCRs) ..7-8 How to achieve selective coordination ..9-10 Selective coordination using fuses ..11 Selective coordination using upstream Eaton thermal magnetic circuit breakers ..12 240, 480, 600 Vac Quick Pick tables ..13 240 Vac Circuit breaker tables ..14 480 Vac Circuit breaker tables.

2 15 600 Vac Circuit breaker tables ..16 QSCP applications and fuse sizing Lighting circuits ..17 Motor circuits ..18 Transformers ..19 CUBEFuse sizing for motors (115-575 Vac) ..20 Protecting leads fed from Uninterruptable Power Supplies (UPS) ..21 Surge Protective Devices (SPDs) ..22 Reference materials ..23 ContentsDescription Page Description Page2 Application Note 3148 Effective August 2018 Quik-Spec Coordination Panelboard (QSCP) Application utilizing the Bussmann series CUBEFuse Compact Circuit Protector Base (CCPB) fusible disconnect, the panel is rated up to 600 Vac and is capable of providing up to a 200 kA short-circuit current rating (SCCR).

3 At the same time, it provides many features that increase electrical safety .IntroductionThe Bussmann series Quik-Spec Coordination Panelboard (QSCP) is innovative in many ways compared to other commercially available branch circuit panelboards, while providing the benefits of current-limiting fusible overcurrent protection . The QSCP can simplify the effort to ensure Code compliance for systems where selective coordination is a mandatory NEC requirement, as well as for other electrical systems .IssueFeaturesBenefitsCode complianceSelective coordination between branch and upstream fuses or upstream Eaton circuit breakers using published tablesSimplified selective coordination designs for fault levels up to 200 kA, including systems required by NEC 620.

4 62, 700 .28, 701 .27, 708 .54 and 645 .27UL Listed panel short-circuit current ratings available up to 200 kAEasier to comply with electrical system protection requirements in NEC 110 .10UL Listed, high, 300 kA AC interrupting rating Low-Peak fusesEasily complies with the interrupting rating requirements of NEC 110 .9No need to be constrained by series ratingsCCPB branch circuit fused disconnectCurrent-limiting overcurrent protection integrated with innovative, compact, UL 98, horsepower rated, load-break branch circuit disconnectU .B .C . & C .B .C . Seismic Qualified, I .B .C . Approved (Uniform Building Code, California Building Code, International Building Code)Meets the requirements of installation in areas subject to earthquakesSurge Protective Device optionHelps comply with 2014 NEC 700.

5 8 that requires a listed SPD to be installed in or on all emergency system switchboards and panelboards and 517 .26 for healthcare life safety branchSafetyCUBEFuse/CCPB amp rating rejection systemHelps ensure continued circuit protection at the specified standard branch circuit amp ratingFinger-safe CUBEFuse and disconnect assembly (with dead-front cover installed)Helps prevent exposure to live componentsPermanent lockout/tagout provisions on main and branch circuit disconnectsAllows for isolation of individual branch circuit loads or entire panel for safe work practicesCUBEFuse and CCPB disconnect interlockedHelps ensure circuit is de-energized before fuse removalService fuses without removing deadfronts or interior trimReduced exposure to live electrical partsEase and flexibilityUL Listed with up to 600 Vac panel voltage ratingSuitable for use on most AC systems.

6 600 V or lessUL Listed 125 Vdc panel voltage rating on MLO with 20 kA SCCR with CCPB 80 amps or less .Suitable for use on systems, 125 Vdc or less and 80 A or less branch circuitsStandard 20 inch panel widthSpace requirements equivalent to other commercially available circuit breaker branch circuit panelboardsNon-fused main disconnect, fused main disconnect or main lug only configurations available up to 400 AProvides design and overcurrent protection optionsLocal open fuse indicationOpen circuits can be identified quickly and easilyCCPB branch circuit fused disconnectPanelboard branch circuits configurable up to 100A in 1.

7 2- and 3-pole devices with Class CF CUBEFuse overcurrent protection (Class J, time-delay or fast-acting performance)Surface and flush mount enclosuresInstallation design options18, 30 and 42 branch circuit positionsNEMA 1 and 3R enclosuresDoor-in-door availableUL service entrance rated panel optionSub-feed lug optionsSub-feed fused disconnect switch optionEquipped with six space spare CUBEFuse holderSpare CUBEF uses are readily available when in place, speeding maintenance procedures3 Application Note 3148 Effective August 2018 Quik-Spec Coordination Panelboard (QSCP) Application Overview Ease of selective coordination with upstream Bussmann fuses or Eaton circuit breakers Panel SCCR available up to: 200 kA for 600 Vac or less panels, 20 kA for 125 Vdc or less panels.

8 600 Vac or less 125 Vdc, MLO only, CCPB 80A or less . 30 A, 60 A, 100 A, 200 A or 400 A panel rating Standard 20 width 18, 30 and 42 branch positions available Sub-feed lug options Sub-feed fused disconnect option Surge Protective Device option Equipped with 6 space spare CUBEFuse holder Surface or flush mount Door-in-door trim available200 A and 400 A main disconnect Fused and non-fused versions Fused disconnects use time-delay or fast-acting Class J fuses Allows for isolation of all branch circuits Permanent lockout means Contact blades visible without removing dead-front cover Interlock with dead-front cover ensures switch is OFF before removing cover30 A.

9 60 A and 100 A CCP fused main disconnect Integrates fuse protection and disconnect into single, finger-safe device Time-delay or fast-acting Class CF CUBEFuse with Class J performance Switch interlock prevents removing fuses while energized Local open fuse indicationCCPB fused branch disconnect Uses time-delay or fast-acting Class CF CUBEFuse with Class J performance CCPB SCCR: 200 kA/600 Vac 20 kA/125 Vdc, 80 A or less Hp rated, branch circuit disconnect Circuits up through 100 A, 1-, 2- and 3-pole Permanent lockout provisions Local open fuse indication Switch interlock prevents removing fuses while energized Fuse ampacity rating rejectionMain Lug Only (MLO)Fused main disconnectQSCP with time-delay CUBEF uses for branch circuit protection of all types of loadsQSCP with fast-acting CUBEF uses for branch circuit protection of electrical loads such as those fed from a UPS4 Application Note 3148 Effective August 2018 Quik-Spec Coordination Panelboard (QSCP)

10 Application time-delay or fast-acting Class CF CUBEFuse contact blade design in conjunction with CCPB fused disconnect provides amp rating rejection at specified levels (15, 20, 30, 40, 50, 60, 70, 90 and 100 A - See Table 3) . Blade design also interlocks with CCPB disconnect assembly to prevent fuse removal while energizedCCPB disconnect handle provides clear circuit status indication with colored and international symbol markingsLocal, neon open fuse indication (requires panelboard bus be energized, circuit closed and minimum 90 Vac)Time-delay or fast-acting Class CF CUBEFuse provides Class J overcurrent protection Table 2.