SEW BW033-012 Braking Resistor

Technical SpecificationsModel:BW033-012 Brand:SEW Product type:External Dynamic Braking Resistor Weight:2.1kg Dimension:220mm80mm130mm Resistance:33Ω ±10% Continuous braking power:1.2kW Protection class:IP20 Operating temperature:-20℃ ~ +40℃ Storage temperature:-40℃ ~ +85℃ Relative humidity:5%~85%,non-condensing Certification:CE

System compatibilityBW033-012 is SEW BW series external braking resistor. Compatible with MOVIDRIVE MD60A, MDX61B servo drives, MOVITRAC B inverters and BTS brake chopper modules. Widely used for small conveyor, packaging and material handling machinery, used for legacy SEW drive system maintenance and spare replacement.

FunctionThis wire-wound braking resistor consumes regenerative energy generated by motor deceleration. When DC bus voltage rises, the brake chopper activates and releases excess energy through this resistor to suppress overvoltage fault. Built-in thermal contact for overtemperature alarm. Terminal block for DC bus wiring.

InstallationPower off the drive DC bus before installation. Mount BW033-012 vertically in control cabinet, keep sufficient air circulation. Separate high voltage braking cables and low voltage control wiring. Connect resistor terminals to brake chopper or drive brake terminals. Wire thermal contact signal to drive fault input. Test braking function after wiring.

InterfaceBrake power connection terminals, thermal protection contact terminals, shield grounding terminal.

FeatureSEW BW033-012 compact wire wound braking resistor. 33 ohm impedance, continuous 1.2kW rating. Built-in thermal monitoring contact. Good overload capability for intermittent braking. High temperature resistant wire winding. Discontinued spare part, only for SEW inverter and servo system maintenance replacement. Suitable for small logistics conveyor and packaging automation equipment.

DiagnosticDC bus overvoltage alarm during deceleration: resistor open circuit or loose terminal; Overtemperature fault: poor ventilation, excessive braking duty cycle; Resistor no heating: brake chopper not triggered; Short circuit fault: resistor insulation breakdown.

Product BriefSEW BW033-012 is BW series 33Ω 1.2kW external braking resistor, used to dissipate regenerative energy for SEW MOVIDRIVE and MOVITRAC inverters and servo drives.

DisclaimerAll parameters are for reference only and not the basis of quotation. Goods are scarce,overseas delivery lead time 3-7 working days. It is only used for equipment maintenance and retrofit.