{"product_id":"abb-acs550-01-125a-4-acs550-variable-frequency-drive","title":"ABB ACS550-01-125A-4 ACS550 Variable Frequency Drive","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eOperating within three-phase industrial power grids, the \u003cstrong\u003eABB ACS550-01-125A-4\u003c\/strong\u003e variable frequency drive provides speed and torque regulation for three-phase induction motors. Engineered for normal-duty applications up to \u003cstrong\u003e55 kW (100 HP)\u003c\/strong\u003e, this drive combines vector control, scalar control, and a built-in harmonic mitigation swing choke to optimize mechanical performance and energy efficiency. The unit is housed in a robust \u003cstrong\u003eIP21 (UL Type 1)\u003c\/strong\u003e enclosure, making it suitable for standard side-by-side cabinet mounting or direct wall integration within clean, dry industrial environments.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.25rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdvanced Vector Control:\u003c\/strong\u003e Supports both open-loop vector and scalar control modes to adapt to varying torque demand profiles.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHarmonic Reduction:\u003c\/strong\u003e Features a patented variable inductance swing choke to suppress raw harmonics at both partial and full motor loads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated EMC Filter:\u003c\/strong\u003e Built-in RFI\/EMC filter compliant with EN 61800-3 standards for minimal electromagnetic interference.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Communication Protocols:\u003c\/strong\u003e Standard Modbus RTU communication integrated on-board via RS-485 interfaces.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAssistant Control Panel:\u003c\/strong\u003e Multilingual alphanumeric control panel featuring guided start-up assistants, real-time diagnostic readouts, and parameter backup functions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.25rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentrifugal Pumps:\u003c\/strong\u003e Variable flow control for water supply, booster stations, and waste-water processing plants.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustrial Fans:\u003c\/strong\u003e Power-efficient airflow regulation in ventilation systems, cooling towers, and dust collectors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConveyor Systems:\u003c\/strong\u003e Soft-start ramp profiles and speed synchronization for production lines and bulk material handling.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir Compressors:\u003c\/strong\u003e Constant pressure maintenance through continuous motor speed modulation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2d3748;\"\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold;\"\u003eValue \/ Specification\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eABB\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eACS550-01-125A-4\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eInput Voltage Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e380 - 480 V AC (3-Phase)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eInput Frequency Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e48 to 63 Hz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eOutput Power (Normal Use)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e55 kW \/ 100 HP\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eOutput Current (Normal Use)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e125 A\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eEnclosure Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eIP21 (UL Type 1)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eFrame Size\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eR4\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eOperating Temperature Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e-15 to 40 degC (No derating) \/ up to 50 degC (With derating)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e34.00 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003ePackage Dimensions (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e265 mm (W) x 739 mm (H) x 286 mm (D)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eCommodity Code\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e85044095\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2d3748;\"\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold;\"\u003eTerminal \/ Port\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold;\"\u003eFunction \/ Signal Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eU1, V1, W1\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eThree-phase AC line input supply terminals\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eU2, V2, W2\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eThree-phase motor connection output terminals\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eUC+, UC-\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eDC bus connection (for dynamic brake chopper modules)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eX1: AI1 \/ AI2\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eProgrammable analog inputs (Voltage 0-10V, Current 0\/4-20mA)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eX1: DI1 to DI6\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eProgrammable digital inputs (PNP\/NPN, 24V DC auxiliary power)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eX1: RO1, RO2, RO3\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eProgrammable form-C relay outputs (250V AC \/ 30V DC, max 2A)\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe ACS550-01-125A-4 is part of the mature ACS550 line. For modern migration tracks or new infrastructure planning, the ABB ACS580-01-124A-4 serves as the direct hardware replacement. Note that when migrating to the ACS580 series, control panel templates and serial parameter sets must be updated since parameter indexes and software profiles differ between the older ACS550 firmware and newer Drive-to-Drive platforms.\u003c\/p\u003e\n\n\u003ch4\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eTo prevent thermal accumulation, ensure a minimum clearance of 200 mm above and below the R4 frame size when mounting inside electrical enclosures. Driving high-inertia loads like heavy ventilation fans or industrial centrifuges without a braking resistor can trigger overvoltage trips (Fault 2 - DC OVERVOLT) during rapid deceleration ramps. To mitigate this issue, configure the drive parameter to utilize the \"deceleration-limit\" function or integrate an external dynamic braking chopper unit.\u003c\/p\u003e\n\n\u003ch4\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eAlways configure the correct Application Macro (e.g., HVAC, 3-wire, or PID control) during initial start-up, as changing the macro later will restore default values and overwrite customized digital input routing. To suppress high-frequency electrical noise, use symmetrical shielded motor cabling and ground the shield 360 degrees at both the VFD PE terminal plate and the motor terminal box.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cp style=\"color: #9b2c2c; font-weight: bold; margin: 0 0 0.5rem 0;\"\u003eCRITICAL WARNING: ELECTRICAL HAZARD\u003c\/p\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0; font-size: 0.95rem;\"\u003ePrior to commencing installation or maintenance, isolate all incoming power lines. Wait at least 5 minutes after disconnecting the power supply to allow the internal DC bus capacitors to fully discharge. Always verify the absence of voltage on terminals U1\/V1\/W1, U2\/V2\/W2, and UC+\/UC- with a certified multimeter before handling connection terminals.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem;\"\u003e1\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748; padding-top: 2px;\"\u003eMount the R4 frame drive vertically on a flat, non-flammable wall or backplate inside an IP54 or equivalent enclosure if installed in dusty environments.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem;\"\u003e2\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748; padding-top: 2px;\"\u003eConnect the input line supply lines to U1, V1, and W1, and the motor power lines to U2, V2, and W2. Ensure correct terminal torque values according to Frame R4 manual requirements.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem;\"\u003e3\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748; padding-top: 2px;\"\u003eRoute the low-voltage control signal cables (AI, DI, Relay) through separate metal conduits to prevent cross-talk and high-frequency electrical coupling with the motor cables.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem;\"\u003e4\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748; padding-top: 2px;\"\u003ePerform ground continuity tests on both the motor chassis and the VFD housing to ensure a low-impedance connection to the main facility earth grid.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":52701955490155,"sku":"ACS550-01-125A-4","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/acs550-01-125a-4-ohjfsmv3t0c_90a2dd8d-ad6a-4d6a-bfdb-9ba472b92483.jpg?v=1766478059","url":"https:\/\/www.plcprotech.com\/id\/products\/abb-acs550-01-125a-4-acs550-variable-frequency-drive","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}