{"product_id":"emp-shield-3-phase-277-480-volt-ac-emp-cme-lightning-protection","title":"EMP Shield 3-Phase 277-480 Volt AC EMP, CME, \u0026 Lightning Protection","description":"\u003cdiv style=\"display: flex; flex-wrap: wrap; align-items: center; gap: 32px; margin: 0 0 40px;\"\u003e\n\u003cdiv style=\"flex: 2 1 320px; min-width: 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/front-of-the-emp-shield-3p-277-480-w-wired-three-phase-unit-showing-its-three-phase-lights-and-color-coded-leads.jpg\" alt=\"Front of the EMP Shield 3P-277-480-W wired three-phase unit showing its three phase lights and color-coded leads\" width=\"1200\" height=\"818\" style=\"display: block; width: 100%; max-width: 1200px; height: auto; margin: 0 auto;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"flex: 3 1 320px; min-width: 0; text-wrap: pretty;\"\u003e\n\u003ch2 style=\"margin-top: 0;\"\u003eEMP Shield 3-Phase 277-480V EMP Protection Brings EMP And Surge Defense To Surface-Mounted 277\/480V Panels\u003c\/h2\u003e\n\u003cp\u003eThe 3P-277-480-W is the wired model in EMP Shield's 3-Phase Series for 277\/480V AC panels. It is designed for surface-mounted electrical panels and sits on the wall next to the panel it protects. According to EMP Shield, this industrial unit defends against electromagnetic pulses in their E1, E2 and E3 phases, coronal mass ejections (CME), lightning and every form of power surge.\u003c\/p\u003e\n\u003cp\u003eEMP Shield points the series at industrial facilities, agricultural operations, businesses and remote infrastructure. It says the units connect to service panels, motor control centers (MCCs) or transfer switches.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003ch3\u003eEMP Shield 3-Phase 277-480V EMP Protection Features\u003c\/h3\u003e\n\u003ch4\u003eBuilt For Surface-Mounted 277\/480V Panels\u003c\/h4\u003e\n\u003cp\u003eOn a surface-mount panel, EMP Shield says the unit may be connected using rigid conduit to any conduit port. The W version comes with preconnected 12 AWG copper wire, which your electrician threads through the conduit into the panel.\u003c\/p\u003e\n\u003ch4\u003ePH#1 To PH#3 Lights On The Unit\u003c\/h4\u003e\n\u003cp\u003eThree green diagnostic lights on the cover, labeled PH#1, PH#2 and PH#3, track the three phases. EMP Shield says they light up when power is restored to show the unit is installed and watching the incoming power source. EMP Shield also asks for a location with good visibility of the lights.\u003c\/p\u003e\n\u003ch4\u003ePer-Phase Surge Capacity Of 228kA\u003c\/h4\u003e\n\u003cp\u003eThe 3-Phase Series carries EMP Shield's rating of 228kA surge capacity per phase and 114kA nominal discharge current per mode. Protection modes are phase-to-phase, phase-to-neutral and \u003cspan style=\"white-space: nowrap;\"\u003ephase-to-ground.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFast, Fused, Solid-State Design\u003c\/h4\u003e\n\u003cp\u003eEMP Shield says over-voltage shunting starts in less than one nanosecond. The design uses solid-state semiconductor circuitry for each phase, fuses each phase independently and lists IEEE C62.41-1991 category A and B combination wave suppression.\u003c\/p\u003e\n\u003ch4\u003eNEMA 4 Plastic J-Box Enclosure\u003c\/h4\u003e\n\u003cp\u003eEMP Shield uses a standard J-box style NEMA 4 plastic enclosure with an integrated conduit port, which it says simplifies mounting and gives a convenient connection to an existing branch panel. The units come from a veteran-owned company in Kansas, USA.\u003c\/p\u003e\n\u003ch4\u003eCompliance And Test Claims\u003c\/h4\u003e\n\u003cp\u003eEMP Shield describes its 3-phase models as UL 1449 Type 2 compliant. It reports testing at Keystone Compliance to MIL-STD-188-125-1, MIL-STD-461G, MIL-STD-464C and RS-105, with RS-105 levels of 50 kV\/m and 90 kV\/m, and states its products appear in the Department of Homeland Security's EMP resilience report.\u003c\/p\u003e\n\u003cbr\u003e\n\u003ch3\u003eReal-World Applications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIndustrial Facilities.\u003c\/strong\u003e EMP Shield built the 3-Phase Series to protect a facility's critical three-phase electrical infrastructure from EMPs, lightning and high-voltage surges.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMotor Control Centers And Transfer Switches.\u003c\/strong\u003e Beyond service panels, EMP Shield says its three-phase units connect to MCCs and transfer switches.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAgricultural Operations.\u003c\/strong\u003e EMP Shield names agricultural sites among the users it designed the series for.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRemote Infrastructure.\u003c\/strong\u003e Remote infrastructure is on EMP Shield's list too, and the company says the series is meant to help essential operations, equipment and communications get through extreme disruptions.\u003c\/p\u003e\n\u003cbr\u003e\n\u003ch3\u003ePractical Comparison\u003c\/h3\u003e\n\u003ch4\u003eWired 277\/480V Model Versus Concealed 277\/480V Model\u003c\/h4\u003e\n\u003cp\u003eThis wired unit mounts outside a surface-mounted panel with its lights on the cover. EMP Shield's 3P-277-480-RL concealed model is for flush-mounted panels, sitting inside the breaker box with a separate exterior LED box.\u003c\/p\u003e\n\u003ch4\u003e277\/480V Model Versus 120\/208V Model\u003c\/h4\u003e\n\u003cp\u003eBoth share the 3-Phase Series ratings, but they are built for different service voltages. Use this model on 277\/480V three-phase panels and EMP Shield's 3P-120-208 models on 120\/208V panels.\u003c\/p\u003e\n\u003ch4\u003eThree-Phase Panel Unit Versus Single-Phase Home Unit\u003c\/h4\u003e\n\u003cp\u003eEMP Shield's 120\/240V single-phase version is for split-phase residential service. A three-phase 277\/480V panel needs a three-phase unit like this one, with protection on all three phases.\u003c\/p\u003e\n\u003cbr\u003e\n\u003ch3\u003eBuyer Guidance\u003c\/h3\u003e\n\u003ch4\u003eMatching The Unit To Your Service\u003c\/h4\u003e\n\u003cp\u003eEMP Shield says to measure the panel's line-to-neutral voltage to determine the system voltage, and that it must not exceed the maximum continuous RMS voltage on the device label. This unit is for 277\/480V three-phase systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Requirements\u003c\/h4\u003e\n\u003cp\u003eEMP Shield recommends professional installation, by a licensed electrician working to code. The unit must sit on a line served by a disconnect, such as 20-amp circuit breakers or 20-amp fused disconnect switches. Mount it as close as possible to the panel, keep leads short and connect only copper or copper-clad wire.\u003c\/p\u003e\n\u003ch4\u003eThis May Be A Good Fit If\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eYour facility runs on 277\/480V three-phase power\u003c\/li\u003e\n\u003cli\u003eYour panel is \u003cspan style=\"white-space: nowrap;\"\u003esurface-mounted\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eYou protect service panels, MCCs or transfer switches\u003c\/li\u003e\n\u003cli\u003eYou want phase lights visible on the unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003ch4\u003eCan It Connect To A Motor Control Center?\u003c\/h4\u003e\n\u003cp\u003eYes. MCCs are one of the three connection points EMP Shield lists, along with service panels and transfer switches.\u003c\/p\u003e\n\u003ch4\u003eHow Many Status Lights Does It Have?\u003c\/h4\u003e\n\u003cp\u003eThree, one per phase. EMP Shield uses one LED for DC versions, two for single-phase power and three for three-phase power.\u003c\/p\u003e\n\u003ch4\u003eWhere Should The Neutral Lead Go?\u003c\/h4\u003e\n\u003cp\u003eEMP Shield says to connect the neutral lead as close as possible to the neutral entrance service lug, with each phase lead running through its own selected breaker. Running them straight to the service entrance lugs is not allowed.\u003c\/p\u003e\n\u003ch4\u003eWhat Are EMP Shield's Warranty Terms?\u003c\/h4\u003e\n\u003cp\u003eThe unit carries EMP Shield's 10-year limited warranty against defects in materials and workmanship, with repair or replacement at EMP Shield's option. A lightning-destroyed unit is replaced for $50 after the destroyed unit is sent in. Damaged connected equipment may be reimbursed up to $25,000 under EMP Shield's separate protection policy, provided its conditions are met, which include licensed electrician installation and a claim within 30 days.\u003c\/p\u003e\n\u003cbr\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x EMP Shield 3P-277-480-W 3-Phase Unit With Preconnected Leads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003ch3\u003eThree-Phase Coverage Where Power Is Distributed\u003c\/h3\u003e\n\u003cp\u003eThe EMP Shield 3-Phase 277-480V EMP Protection unit gives a surface-mounted 277\/480V panel EMP, CME, lightning and surge protection, with a status light for each phase on the cover. If you would like help confirming your service voltage before you order, the Outbound Power team is here to help.\u003c\/p\u003e\n\u003cbr\u003e\n\u003ctable style=\"border-collapse: collapse; max-width: 100%; overflow-x: auto;\" cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\" style=\"background-color: rgb(242, 242, 242); text-align: left; width: 100%;\"\u003e\n\u003ch3\u003eEMP Shield 3-Phase 277-480 Volt AC EMP, CME, \u0026amp; Lightning Protection Specifications\u003c\/h3\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: rgb(242, 242, 242);\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 44.1489%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 55.8511%;\"\u003eEMP Shield\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3P\/277\/480V\/W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3P-277-480-W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVersion\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWired, surface mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: rgb(242, 242, 242);\"\u003e\u003cstrong\u003eElectrical\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e277\/480V AC 3-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNominal Discharge Current (In)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e114kA per mode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurge Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e228kA per phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtection Modes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePhase-to-Phase, Phase-to-Neutral, Phase-to-Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResponse Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLess than 1 nanosecond (per EMP Shield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhase Fusing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEach phase independently fused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCircuitry\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSolid-state semiconductor, each phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: rgb(242, 242, 242);\"\u003e\u003cstrong\u003eProtection\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThreats Covered\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEMP (E1, E2, E3), CME, lightning, power surges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurge Standard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUL 1449 Type 2 compliant (per EMP Shield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCombination Wave\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIEEE C62.41-1991 category A \u0026amp; B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTest Lab\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKeystone Compliance (per EMP Shield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTest Standards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMIL-STD-188-125-1, MIL-STD-461G, MIL-STD-464C, RS-105\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRS-105 Test Levels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 kV\/m and 90 kV\/m (per EMP Shield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: rgb(242, 242, 242);\"\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProfessional installation recommended, licensed electrician\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnects To\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eService panels, MCCs or transfer switches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisconnect\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20-amp circuit breakers or 20-amp fused disconnect\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConductor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCopper or copper-clad wire only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePanel Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSurface-mounted panels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBeside the panel, rigid conduit to any conduit port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLeads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePreconnected 12 AWG copper wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiagnostic LEDs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 green (PH#1, PH#2, PH#3) on the unit face\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Check\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMeasure panel voltage line to neutral\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeutral Lead\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAs close as possible to the neutral entrance lug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLocation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAs close as possible to the panel, short leads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePanel Cover Clearance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAt least 1 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConduit Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: rgb(242, 242, 242);\"\u003e\u003cstrong\u003ePhysical\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJ-box with integrated conduit port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNEMA 4 plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMade In\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKansas, USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: rgb(242, 242, 242);\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLimited Warranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 years, defects in materials and workmanship\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLightning Replacement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e$50 with the destroyed unit sent in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnected Equipment Policy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to $25,000, conditions apply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cbr\u003e\n\u003ch3\u003eEMP Shield 3P-277-480-W Manual\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/emp-shield-single-phase-and-3-phase-installation-instructions.pdf\" title=\"EMP Shield 3P-277-480-W Manual\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/emp-shield-3p-277-480-w-manual.jpg\" alt=\"EMP Shield 3P-277-480-W Manual\" width=\"100\" height=\"100\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/a\u003e\u003c\/div\u003e","brand":"EMP Shield","offers":[{"title":"Default Title","offer_id":46931183927545,"sku":"3P-277-480-W","price":439.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/EMP_Shield_3_Phase_277-480_Volt_Wired.jpg?v=1760314177","url":"https:\/\/outboundpower.com\/products\/emp-shield-3-phase-277-480-volt-ac-emp-cme-lightning-protection","provider":"Outbound Power","version":"1.0","type":"link"}