VACON NXS03855-A5L0SSB-A1A2000000 Liquid Cooled Inverter 385A Sensorless Vector Drive IP54 200kW Frequency Converter

　　VACON NXS03855-A5L0SSB-A1A2000000 is an enclosed standalone Liquid Cooled Inverter from the VACON NXS series.This 200kW dustproof frequency converter delivers 385 A rated output current with IP54 enclosure protection.It operates on a 3-phase 380–500 VAC supply,providing sensorless vector control for heavy-duty pump,fan,compressor,and conveyor applications across general manufacturing,marine auxiliaries,and water treatment industries.

　　What Is a Liquid Cooled AC Drive?

　　A liquid cooled AC drive is a variable frequency drive that transfers heat generated by its power electronics into a liquid coolant medium—typically a water-glycol mixture—instead of relying on ambient air forced through a heatsink.This thermal management approach allows the drive to operate at full rated capacity in environments with high ambient temperature,airborne contaminants,or space constraints that preclude conventional air cooling.

　　The VACON NXS03855-A5L0SSB-A1A2000000 is a 6-pulse enclosed standalone drive within the NXS general-purpose range.It leverages liquid cooling to maintain performance in harsh industrial settings where high levels of dust,moisture,or corrosive agents make filtered air cooling impractical.The drive belongs to the VACON NX family,which spans air-cooled and liquid-cooled configurations from 0.55 kW to 5.3 MW per manufacturer documentation.

　　Key Specifications

　　Product series:VACON NXS

　　Product type:Enclosed standalone liquid cooled AC drive

　　Part number:NXS03855-A5L0SSB-A1A2000000

　　Rated motor power:200 kW

　　Rated output current(I_L):385 A

　　Supply voltage:380 to 500 VAC 3-phase

　　DC bus voltage range:465 to 800 VDC

　　Input frequency:45 to 66 Hz

　　Output frequency:0 to 320 Hz

　　Switching frequency:3.6 kHz default

　　Overload capacity:150%for 1 minute,110%continuous per manufacturer specifications

　　Starting torque:>200%of nominal motor torque

　　Control methods:Sensorless vector control,U/f frequency control

　　Speed error(static):<1%of nominal speed per manufacturer datasheet

　　Motor types supported:Induction motors,permanent magnet motors

　　Enclosure class:IP54(dust and splash-proof)/NEMA 12 equivalent

　　Frame size:FR10

　　EMC emission level:Class T–compliant with IEC/EN 61800-3 for IT(ungrounded)networks

　　Control panel:Alpha-numeric display with startup wizard

　　Mounting:Floor-standing enclosed cabinet

　　Cooling method:Liquid cooled(external water-glycol circuit required)

　　Internal power supply:24 VDC available for external control circuits

　　I/O configuration:A1 option board(6 DI,1 DO,2 AI,1 AO,+10 V reference,+24 V output);A2 option board(2 relay outputs NO/NC)

　　Option board expansion:5 total slots(2 basic+3 option boards)

　　Communication interfaces:RS-485(Modbus RTU)standard;fieldbus options via add-on cards per manufacturer documentation

　　Built-in protections:Integrated EMC filter,AC line choke,motor overload protection(I²t),overcurrent,overvoltage,undervoltage,phase loss,ground fault

　　Pollution degree:PD2 per IEC/EN 61800-5-1

　　Operating ambient temperature(air side):0°C to+40°C

　　Storage temperature:-40°C to+70°C

　　Vibration resistance:IEC/EN 60068-2-6,0.25 mm displacement/0.25 G acceleration per manufacturer datasheet

　　Shock resistance:IEC/EN 60068-2-27,15 G maximum(packaged)per manufacturer datasheet

　　Net weight:340 kg per manufacturer datasheet

　　Gross weight:341 kg per manufacturer datasheet

　　Dimensions(W×H×D):595 mm×2020 mm×602 mm per manufacturer datasheet

　　Conformity and approvals:CE(Low Voltage Directive 2014/35/EU,EMC Directive 2014/30/EU),cULus(UL and CSA),RCM(Australia/New Zealand),EAC(Eurasian Economic Union),Korean KC per manufacturer configuration data

　　Technical Highlights

　　Liquid cooling enables full-load operation in contaminated environments over 40°C ambient.The drive transfers heat directly to an external water-glycol circuit,eliminating the need for filtered cabinet air intake.This removes the risk of heatsink clogging from airborne dust,fibers,or conductive particles,and allows the drive to sustain rated current at ambient temperatures exceeding 40°C where air-cooled drives typically require derating by 2–3%per degree Celsius above rated ambient.

　　Built-in AC choke and EMC filter eliminate the need for external line-side filtering.The drive ships standard with a 3-phase AC line choke and a Class T EMC filter compliant with IEC/EN 61800-3 for IT(ungrounded)networks,providing harmonic mitigation per IEEE 519 recommendations and conducted emission suppression without external filter cabinets.

　　Sensorless vector control delivers starting torque exceeding 200%of motor nameplate rating,enabling the drive to accelerate high-inertia loads such as large centrifugal fans,rotary kilns,and screw compressors without encoder feedback.The static speed error of<1%allows accurate open-loop process regulation for pump flow control and conveyor speed synchronization.

　　Modular I/O and fieldbus architecture enables on-site customization.The drive provides five option board slots—two pre-populated with basic I/O and three empty—allowing the user to add fieldbus interfaces(Profibus,PROFINET,EtherNet/IP,DeviceNet),encoder feedback cards,or additional analog/digital I/O without factory reconfiguration.All expansion cards support hot-reconfiguration with automatic board identification per the VACON NX system design.

　　6-pulse rectifier topology with integrated choke achieves power factor exceeding 0.95 at rated load.The design reduces total harmonic current distortion(THDi)to approximately 35%at the drive input terminals,helping users comply with utility harmonic standards without specifying active front-end or multipulse rectifier solutions for most industrial installations.

　　Applications

　　Heavy-duty pump drives in water and wastewater treatment:Controls 200 kW centrifugal and positive-displacement pumps used for raw water intake,booster stations,and sludge transfer.Sensorless vector control regulates flow and pressure to within±1%speed accuracy,reducing throttling valve losses and typically improving pumping energy efficiency by 20–40%compared to fixed-speed operation.

　　Industrial fan and blower speed control:Manages large induced-draft and forced-draft fans,cooling tower fans,and dust extraction blowers in cement,steel,and power generation plants.The IP54 sealed enclosure prevents dust ingress into power electronics,addressing a common failure mode in air-cooled drives operating near clinker coolers,baghouse dust collectors,and mill ventilation circuits.

　　Marine auxiliary machinery:Powers engine room auxiliaries including seawater cooling pumps,ballast pumps,air compressors,and cargo oil pumps.The liquid cooling system rejects heat to the vessel’s central fresh water loop,reducing engine room air conditioning load and eliminating salt-laden air exposure to drive internals.The drive carries CE and cULus approvals,with marine classification available upon request.

　　Compressor drives in dusty industrial environments:Controls 200 kW screw,reciprocating,and centrifugal compressors for process air,nitrogen generation,and refrigeration plants.The liquid cooled design removes the risk of oil mist and dust buildup on power semiconductor heatsinks,preserving thermal performance in compressor houses operating without conditioned air supply.

　　Conveyor and materials handling systems:Operates belt conveyors,screw conveyors,and bucket elevators in mining,quarrying,and bulk material handling facilities.The drive's 200%starting torque and 150%overload capacity for one minute handle transient peak loads when conveyors start under fully loaded conditions,while the IP54 enclosure withstands washdown cleaning and aggregate dust exposure.

　　Steel mill and foundry auxiliary drives:Regulates speed of rolling mill auxiliary drives,furnace combustion air blowers,cooling bed roller tables,and fume extraction fans.The liquid cooling system isolates power electronics from the high radiant heat and metallic dust prevalent in steel processing environments,enabling continuous operation with reduced derating compared to air-cooled drives in the same installation conditions.

　　Selection Guidance

　　Suitable for installations where ambient air quality prevents reliable air cooling:The liquid cooled drive operates without forced air circulation through the power electronics section,making it appropriate for cement plants,steel mills,wastewater lift stations,and marine engine rooms where airborne dust,fibers,salt mist,or corrosive gases undermine air-cooled drive reliability.The IP54 enclosure provides additional protection against water spray and dust ingress per IEC 60529.

　　Suitable for 200 kW induction or permanent magnet motor control on IT(ungrounded)mains:The drive accepts 380–500 VAC 3-phase input and ships with Class T EMC filtering compliant with IEC/EN 61800-3 for IT network use.Evaluate the existing motor winding insulation class for compatibility with the drive's 3.6 kHz switching frequency and 800 ns typical voltage rise time.

　　Suitable for applications requiring liquid cooling heat rejection capacity:The drive requires an external cooling circuit delivering glycol-water mixture at a defined flow rate and inlet temperature.Users must calculate the total heat rejection into the coolant—approximately 8–10 kW for a 200 kW drive operating at rated load with 97%drive efficiency—and verify the existing chiller,cooling tower,or central cooling loop can accommodate this thermal load before installation.The manufacturer provides power loss data per product manual for system-level cooling engineering.

　　Not suitable for installations without existing liquid cooling infrastructure:This drive dissipates its losses into a liquid coolant circuit and cannot operate without an external glycol-water cooling loop.If the facility lacks a central cooling water system,chiller,or dry cooler with sufficient capacity,select an air-cooled VACON NXS standalone model in IP54 enclosure(part codes with"H"cooling designation)as an alternative.Air-cooled NXS models in FR10 rated frame are available for the same 200 kW/385 A rating.

　　Not suitable for line-side regenerative or active front-end requirements:The NXS03855-A5L0SSB-A1A2000000 uses a 6-pulse diode rectifier front end with built-in choke and cannot regenerate braking energy back to the mains.For applications requiring active front-end(AFE)regeneration—such as downhill conveyors,high-inertia deceleration,or utility harmonic compliance below 5%THDi—select a VACON NXP system drive with liquid cooled AFE supply unit and inverter module combination.

　　FAQ

　　1.What are the dimensions and weight of the NXS03855-A5L0SSB-A1A2000000?

　　The drive cabinet dimensions are 595 mm in width,2020 mm in height,and 602 mm in depth.Net weight is 340 kg and gross shipping weight is 341 kg per manufacturer datasheet.

　　2.What is the delivery time and lead time for the VACON NXS03855-A5L0SSB-A1A2000000?

　　The manufacturer standard lead time for this VACON NXS model is 8 to 12 weeks.Authorized distributors with local stock in China can ship within 3 to 5 business days from warehouse.

　　3.How much does the VACON NXS03855-A5L0SSB-A1A2000000 cost and what price should I expect?

　　The VACON NXS03855 liquid cooled drive typically ranges from 18,000to25,000 USD depending on configuration,quantity,and coolant circuit accessory options.Prices fluctuate due to exchange rates,tariffs,and factory adjustments.For an accurate quotation with current pricing inclusive of import duties and shipping,contact Beijing Zhongping Technology directly.

　　4.Is the VACON NXS03855-A5L0SSB-A1A2000000 in stock?Can you ship immediately?

　　We maintain inventory of the VACON NXS03855 for fast fulfillment at Beijing Zhongping Technology.Regional manufacturer warehouse availability fluctuates with global demand.Verify stock status when requesting a quotation.

　　5.What payment terms do you accept for purchasing NXS03855 drives?

　　We accept bank wire transfer(T/T)and major corporate payment methods.For qualified corporate accounts,Beijing Zhongping Technology offers net 30 payment terms upon credit verification.

　　6.What cooling circuit does the NXS03855-A5L0SSB-A1A2000000 require for installation?

　　The drive requires an external closed-loop cooling circuit with a water-glycol mixture at a defined flow rate,inlet temperature,and pressure per the VACON NX Liquid Cooled User Manual.The installer must provide the external pump,heat exchanger,coolant piping,and circulation loop.The drive itself includes internal coolant manifolds and connection ports ready for field piping.We provide pre-delivery technical support for cooling circuit sizing at Beijing Zhongping Technology.

　　7.What are the customs duties,import tariff codes,and customs clearance procedures for importing the NXS03855?

　　The HTSUS customs code is 8504.40.6010 and the ECCN classification is EAR99.International shipments are dispatched under Incoterms CPT(Carriage Paid To),with duties,customs fees,and applicable VAT payable by the buyer.Beijing Zhongping Technology provides commercial invoices and packing lists required for China customs clearance on all orders.

　　8.What warranty period applies and what is the return policy for the NXS03855-A5L0SSB-A1A2000000?

　　The standard warranty is 2 years from the date of delivery against manufacturing defects per manufacturer policy.We process returns only with prior Return Material Authorization(RMA)approval.Beijing Zhongping Technology issues RMA numbers within 48 business hours of receipt and coordinates warranty service with the manufacturer.

　　9.What spare parts and after-sales service support are available for the NXS03855-A5L0SSB-A1A2000000?

　　We stock critical spare parts including control boards,cooling circuit components,I/O option boards,and power semiconductor modules for the VACON NX series.Service and repair capability for this model covers all major cities in China through a network of service partners.Beijing Zhongping Technology provides after-sales technical support and spare parts procurement.

　　10.How do I select an alternative model if the NXS03855-A5L0SSB is discontinued,obsolete,or does not fit my application?

　　The VACON NXS03855 is an active product with no scheduled discontinuation notice.If an air-cooled alternative fits your application,select an NXS model with"H"cooling designation in FR10 frame at the same 385 A/200 kW rating.For applications requiring active front-end regeneration capability,select a VACON NXP liquid cooled AFE-inverter combination.Beijing Zhongping Technology provides cross-reference selection assistance for system migration and replacement projects.

　　In addition to the NXS03855-A5L0SSB-A1A2000000,Beijing Zhongping Technology supplies additional liquid cooled NXS enclosed standalone drives within this power segment.All models share the same 380–500 VAC 3-phase supply,IP54 enclosure,and 6-pulse rectifier topology with built-in AC choke and EMC filter.The series covers low-overload ratings from 200 kW/385 A to 250 kW/520 A,and high-overload ratings from 160 kW/300 A to 250 kW/460 A.Available models include NXS03855-A5L0SSB-A1A2000000,NXS04605-A5L0SSB-A1A2000000,and NXS05205-A5L0SSB-A1A2000000.