{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ATV21HD55N4","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"ATV21HD55N4","canonicalUrl":"https://aoctrl.com/schneider/ATV21HD55N4","factsUrl":"https://aoctrl.com/api/mcp/products/ATV21HD55N4","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Altivar 21 ATV21HD55N4 AC drive, 55 kW, 380-480 V 3-phase, 89 A line current, integrated Class A EMC filter, IP20, CE marked.","salesMarkdown":"## 55 kW VFD for pump and fan duty The ATV21HD55N4 is a 55 kW Altivar 21 AC drive from Schneider Electric, designed for variable-torque loads like pumps and fans. It runs on a 380-480 V three-phase supply and delivers 89 A line current at 480 V (102.7 A at 380 V). The drive is rated for asynchronous motors and includes an integrated Class A EMC filter, meeting EN 55011 Class A Group 1 emissions limits out of the box. ## Lifecycle and sourcing reality The ATV21 series remains a supported product line for pump and fan applications. ## Switching frequency and derating The switching frequency is adjustable from 6 to 16 kHz, with a derating factor required above 8 kHz. Running at 16 kHz quiets motor whine but reduces continuous output current — plan the thermal budget accordingly in the panel. The drive is assembled with a heat sink and must be mounted vertically (±10°). Pollution degree 3 per IEC 61800-5-1 means it tolerates conductive dust in industrial environments, but the heat sink needs free airflow. ## Transient overtorque and speed control The drive delivers 120 % of nominal motor torque for 60 seconds (±10 %), useful for breakaway loads or short-duration overloads on conveyor or crusher starts. Speed accuracy is ±10 % of nominal slip from 0.2 Tn to Tn, and the adjustable PI regulator handles closed-loop process control for pressure or flow regulation. ## Communication and fieldbus options The drive includes a 2-wire RS-485 physical interface with RTU transmission frame, supporting 1 to 247 addresses at 9600 or 19200 bps. Data format is 8 bits, 1 stop, with configurable parity. Optional communication cards add BACnet, LonWorks, Metasys N2, or Apogee FLN — common for building automation integration. The RJ45 connector on the front panel is for the Modbus bus.","metaTitle":"Schneider ATV21HD55N4 AC Drive, 55 kW, 380-480 V, 3-phase","metaDescription":"Schneider Electric ATV21HD55N4 Altivar 21 AC drive, 55 kW, 380-480 V 3-phase, 89 A line current, integrated EMC filter, mature lifecycle, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["AC Drive (VFD) 480V"],"specifications":{"Depth":"11.4 in (290 mm)","Phase":"3 phase","Width":"12.6 in (320 mm)","Height":"24.8 in (630 mm)","Marking":"CE","Category":"22158-ATV212 30 - 100 HP 460 VOLT","Standards":"IEC 61800-3 environments 1 category C1 IEC 61800-3 environments 2 category C3 EN 61800-3 environments 1 category C3 EN 61800-3 environments 2 category C3 EN 61800-3 environments 2 category C2 EN 61800-3 IEC 61800-3 environments 1 category C3 IEC 61800-3 environments 2 category C1 UL Type 1 IEC 61800-3 category C2 IEC 61800-3 category C3 IEC 61800-3 environments 2 category C2 EN 61800-3 environments 2 category C1 EN 61800-5-1 EN 61800-3 environments 1 category C2 EN 55011 class A group 1 EN 61800-3 environments 1 category C1 EN 61800-3 category C3 IEC 61800-3 environments 1 category C2 IEC 61800-5-1 IEC 61800-3 EN 61800-3 category C2","Diagnostic":"1 LED (red) for DC bus energized","EMC filter":"Class A EMC filter integrated","Data format":"8 bits, 1 stop, odd even or no configurable parity","Noise level":"63.7 dB 86/188/EEC","Option card":"Communication card APOGEE FLN Communication card BACnet Communication card LonWorks Communication card METASYS N2","Speed range":"1...10","Line current":"89 A 480 V 102.7 A 380 V","Apparent power":"76.3 kVA 380 V","Assembly style":"With heat sink","Component name":"ATV21","Connector Type":"1 RJ45","Motor power kW":"55 kW","Output voltage":"= 1 mOhm 500 V DC for 1 minute","Speed accuracy":"+/- 10 % of nominal slip 0.2 Tn to Tn","Regulation loop":"Adjustable PI regulator","Torque accuracy":"+/- 15 %","lifecycle_stage":"mature","Pollution degree":"3 IEC 61800-5-1","Range of Product":"Altivar 21","Shock resistance":"15 gn 11 ms IEC 60068-2-27","Relative humidity":"5...95 % without condensation IEC 60068-2-3 5...95 % without dripping water IEC 60068-2-3","Transmission Rate":"9600 bps or 19200 bps","Operating position":"Vertical +/- 10 degree","Physical interface":"2-wire RS 485","Transmission frame":"RTU","Dielectric strength":"3535 V DC between earth and power terminals 5092 V DC between control and power terminals","Number of addresses":"1...247","Product destination":"Asynchronous motors","Switching frequency":"6...16 kHz adjustable 8...16 kHz with derating factor","Frequency resolution":"Analog input 0.024/50 Hz Display unit 0.1 Hz","Power Supply Voltage":"380...480 V - 15...10 %","Transient overtorque":"120 % of nominal motor torque +/- 10 % 60 s","Type of polarization":"No impedance","Vibration resistance":"1 gn (f= 13...200 Hz) conforming to EN/IEC 60068-2-8 1.5 mm (f= 3...13 Hz) conforming to EN/IEC 60068-2-6","Communication Service":"Monitoring inhibitable Write multiple registers (16) 2 words maximum Read holding registers (03) 2 words maximum Read device identification (43) Time out setting from 0.1 to 100 s Write single register (06)","Power Supply Frequency":"50...60 Hz - 5...5 %","IP degree of protection":"IP20 on upper part without blanking plate on cover EN/IEC 60529 IP20 on upper part without blanking plate on cover EN/IEC 61800-5-1 IP21 EN/IEC 60529 IP21 EN/IEC 61800-5-1 IP41 on upper part EN/IEC 60529 IP41 on upper part EN/IEC 61800-5-1","Motor slip compensation":"Automatic whatever the load Adjustable Not available in voltage/frequency ratio motor control","Maximum transient current":"127.6 A 60 s","Product or Component Type":"Variable speed drive","Maximum Horse Power Rating":"75 hp","Communication Port Protocol":"Modbus","Nominal switching frequency":"8 kHz","Power Supply Voltage Limits":"323...528 V","Environmental characteristic":"Classes 3C1 conforming to IEC 60721-3-3 Classes 3S2 conforming to IEC 60721-3-3","Product Specific Application":"Pumps and fans in HVAC","Speed drive output frequency":"0.5...200 Hz","maximum prospective line Isc":"22 kA","Electromagnetic compatibility":"1.2/50 µs - 8/20 µs surge immunity test level 3 conforming to IEC 61000-4-5 Conducted radio-frequency immunity test level 3 conforming to IEC 61000-4-6 Electrical fast transient/burst immunity test level 4 conforming to IEC 61000-4-4 Electrostatic discharge immunity test level 3 conforming to IEC 61000-4-2 Radiated radio-frequency electromagnetic field immunity test level 3 conforming to IEC 61000-4-3 Voltage dips and interruptions immunity test conforming to IEC 61000-4-11","Power Supply Frequency Limits":"47.5...63 Hz","Maximum Continuous Output Current":"116 A 380 V 116 A 460 V","Asynchronous motor control profile":"Current flux vector control (FVC) without speed feedback Constant voltage/frequency ratio Quadratic voltage/frequency ratio Constant voltage/frequency ratio with automatic IR compensation Energy saving ratio","Ambient Air Temperature for Storage":"-13...158 °F (-25...70 °C)","Ambient air temperature for operation":"14...104 °F (-10...40 °C) (without derating) 104...122 °F (40...50 °C) (with derating factor)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4,072.89","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://www.se.com/vn/en/product/ATV21HD55N4/variable-speed-drive-atv21-55kw-75hp-480v-emc-filter-class-a-ip20/","alternativesUrl":"https://aoctrl.com/api/mcp/products/ATV21HD55N4/alternatives.json"},"ai":{"faq":[{"question":"What is the line current rating of ATV21HD55N4?","answer":"The line current is 89 A at 480 V and 102.7 A at 380 V. Apparent power is 76.3 kVA at 380 V."},{"question":"What compliance standards does ATV21HD55N4 meet?","answer":"The drive is CE marked and complies with IEC 61800-5-1 (safety), IEC 61800-3 (EMC environments 1 and 2, categories C1 to C3), EN 61800-3, and EN 55011 Class A Group 1. It also meets UL Type 1 requirements."},{"question":"How can I order ATV21HD55N4 or check availability?","answer":"This drive is sourced and quoted to order against your BOM quantity through independent distribution. Submit an RFQ for current pricing and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/ATV21HD55N4","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/ATV21HD55N4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}