{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ENW15557","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"ENW15557","canonicalUrl":"https://aoctrl.com/schneider/ENW15557","factsUrl":"https://aoctrl.com/api/mcp/products/ENW15557","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric EasyPact NW series, Trip System 5.0s control unit, LSI protection, 630-6300 A, 690 V AC, 50/60 Hz, micro-processor based.","salesMarkdown":"## What this Trip System 5.0s control unit does for your breaker The ENW15557 is the brains for an EasyPact NW air circuit breaker — a micro-processor-based control unit that handles LSI protection (long-time, short-time, instantaneous) for the 630 A to 6300 A trip range. Rated at 690 V AC on 50/60 Hz networks per IEC 60947-2, it's the piece that decides when to hold or when to clear a fault. ## What the key settings mean on the route Long-time pickup (Ir) is adjustable from 0.4 to 1.0 x In, with ten settings — that's your continuous amp rating, what the breaker carries without tripping. Set it for the cable or bus ampacity, not the breaker's max. The long-time delay (Tr) goes from 0.5 to 24 seconds at 6 x Ir, with a 0 to -20% accuracy tolerance. That's your thermal curve; set it long enough to ride through motor starting inrush but short enough to protect the conductor insulation. Short-time pickup (Isd) has ten settings, and the short-time delay (Tsd) is adjustable from 100 to 600 ms. This is your selectivity band — you want the feeder breaker downstream to clear first. Instantaneous pickup (Ii) is adjustable from 2 to 15 x In, also ten settings, with +/- 10% accuracy, and can be turned Off. That's your arc-flash limit; set it high enough to allow transformer inrush but low enough to catch a bolted fault before the arc flash energy climbs. Thermal memory is enabled — so if the breaker sees a series of overloads close together, it remembers the heat buildup from the previous event. That matters for a motor circuit that cycles on and off; without thermal memory, the breaker never accumulates the I²t heat and lets the motor cook. This control unit mounts fixed drawout into the EasyPact NW breaker cradle — it's not a standalone DIN-rail device. The 77 mm depth, 58 mm width, and 200 mm height fit the standard NW cassette. Neutral position is left; protected poles can be configured as 3D, 3D + N/2, or 4D, with neutral protection settings matching (without protection, 0.5 x Ir, or 1 x Ir). Communication is via NFC (peer-to-peer wireless) and a USB Type-C port — that's how you pull the event logs, alarm logs, and trip logs without opening the panel door. The green/red/orange health status bar and a separate green ready LED give you a quick visual on the state of the unit from across the substation aisle. The lithium non-rechargeable battery backs up the clock and settings during power-down.","metaTitle":"Schneider Electric ENW15557 EasyPact NW Trip System 5.0s Con","metaDescription":"Schneider Electric ENW15557 EasyPact NW Trip System 5.0s control unit. LSI protection, 690 V AC, 630-6300 A rating. Active production, sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Air Circuit Breakers"],"specifications":{"Depth":"77 mm","Width":"58 mm","title":"ENW15557","Height":"200 mm","Status LED":"With green, red and orange health status bar With green ready","description":"Trip unit, EasyPact NW, Trip System 5.0S, drawout and fixed","Battery type":"Lithium non-rechargeable","Network type":"AC","Mounting mode":"Fixed Drawout","Data recording":"Alarm logs Event logs Trip logs","Product weight":"0.213 kg","Thermal memory":"Yes","Trip unit name":"Trip System 5.0s","Protection type":"Overload protection (long time) Instantaneous short-circuit protection Short time short-circuit protection","lifecycle_stage":"current","Fault indication":"Overload Short-circuit Internal fault","Neutral position":"Left","Range of product":"EasyPact NW","Trip unit rating":"630...6300 A","Network frequency":"50/60 Hz","Poles description":"3P 4P","Control Button Type":"I button","With LED indication":"True","Trip unit technology":"Micro-processor based","Product or component type":"Control unit","Neutral protection setting":"Without protection (3D) 0.5 x Ir (3D + N/2) 1 x Ir (4D)","Circuit breaker application":"Standard Industrial","Communication port protocol":"NFC network: wireless interface: peer to peer USB network: Type-C interface: peer to peer","Protected poles description":"3D 3D + N/2 4D","Trip unit protection functions":"LSI","[Ue] rated operational voltage":"690 V AC 50/60 Hz conforming to IEC 60947-2","Long time delay adjustment type":"Adjustable 10 settings","Short-time delay adjustment type":"Adjustable 11 settings","Long time pick-up adjustment range":"0.4...1 x In Off","Ambient air temperature for storage":"-40...85 °C","Long time pick-up adjustment type Ir":"Adjustable 10 settings","Ambient air temperature for operation":"-25...70 °C","[Tr] Long-Time Delay Adjustment Range":"0.5...24 s (6 x Ir), accuracy: 0...- 20 %","Instantaneous pick-up adjustment range":"2...15 x In, accuracy: +/- 10 % Off","Short-time pick-up adjustment type Isd":"Adjustable 10 settings","[Tsd] Short-Time Delay Adjustment Range":"100...600 ms","Instantaneous pick-up adjustment type Ii":"Adjustable 10 settings","[Isd] short-time pick-up adjustment range":"1.5...10 x Ir"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3255269d35ba2d9a405918b126c93db1.pdf","sourceUrl":"https://www.se.com/ae/en/product/ENW15557/trip-unit-easypact-nw-trip-system-5-0s-drawout-and-fixed/"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/ENW15557","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/ENW15557 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}