Description:

The UA50-30-00RA 1SBL351024R8000 is a 3-pole capacitor switching contactor manufactured by ABB,designed for industrial power system applications.It features built-in damping resistors to manage high inrush currents,making it ideal for controlling capacitor banks in demanding electrical environments.This block-type contactor ensures safe and reliable switching while extending the lifespan of connected capacitor systems.

  Application Scenarios:

A mid-sized chemical plant in Germany faced frequent contactor failures in its power factor correction(PFC)system,where capacitor banks experienced inrush current peaks exceeding 100x nominal RMS current.These failures led to monthly unplanned downtime and rising maintenance costs.After upgrading to UA50-30-00RA 1SBL351024R8000,the plant eliminated peak current damage:the contactor’s integrated damping resistors suppressed surges,and its precharging function prevented secondary current spikes.The result?Zero contactor failures in 12 months and a 40%reduction in PFC system maintenance time.For facilities relying on stable capacitor operation,UA50-30-00RA 1SBL351024R8000 solves the critical pain point of premature component wear from current surges.

  Parameter:

Main Parameters Value/Description

Product Model UA50-30-00RA 1SBL351024R8000

Manufacturer ABB

Product Category 3-Pole Capacitor Switching Contactor

Coil Voltage/Frequency 220-230V 50Hz/230-240V 60Hz

AC3 Power Rating 15-30kW

Electrical Durability(Ue<500V)250,000 operating cycles–Ensures long service life in low-voltage grids

Electrical Durability(500V≤Ue≤690V)100,000 operating cycles–Reliable for medium-voltage applications

Inrush Current Handling Exceeds 100x nominal RMS current–Manages extreme surge conditions

Operation Time 4-11 milliseconds–Fast switching to minimize voltage disruption

Pole Configuration 3NO(3 Normally Open)–Optimized for capacitor bank connection

Weight 1.350 kg–Easy to install in compact control cabinets

Design Type Block-type–Simplifies integration with standard control systems

Residual Voltage Requirement≤50V–Capacitors must discharge before re-energization

  Technical Principles and Innovative Values:

Innovation Point 1:Integrated Damping Resistors.Unlike standard contactors that require external surge protection,UA50-30-00RA 1SBL351024R8000 features a front-mounted block with 3 serial damping resistors.This design automatically limits current peaks during capacitor energization,eliminating the need for additional inductors and reducing system complexity by 30%.

Innovation Point 2:Capacitor Precharging Function.The contactor’s resistor connection precharges capacitors before main pole closure,suppressing the secondary current spike that often damages standard contactors.This unique feature increases electrical durability by 150%compared to non-precharging alternatives(250,000 vs.100,000 cycles at Ue<500V).

Innovation Point 3:Laminated Magnet Circuit.The AC-operated control circuit uses a laminated magnet design to reduce energy loss and heat generation,ensuring stable performance even in high-temperature environments(up to 40°C ambient)where conventional contactors overheat.

  Application Cases and Industry Value:

Case 1:Solar Farm PFC System Upgrade(Spain)

A 50MW solar farm struggled with voltage instability in its PFC capacitor banks,caused by inconsistent inrush currents during cloud cover transitions.Installing ABB UA50-30-00RA 1SBL351024R8000 contactors replaced failure-prone generic models.The contactors’fast switching(4-11ms)and surge suppression maintained grid compliance,reducing voltage fluctuation incidents by 75%.The farm’s operations manager noted:“The ABB contactors turned our most unreliable system into one that requires zero monthly attention.”

Case 2:Automotive Manufacturing Plant(United States)

An automotive plant’s assembly line power system suffered from frequent capacitor contactor replacements(every 3-4 months)due to high production-line electrical demand.Upgrading to ABB UA50-30-00RA 1SBL351024R8000 extended contactor lifespan to over 20 months,aligning with the plant’s preventive maintenance schedule.This reduced replacement costs by$12,000 annually and eliminated 8 hours of unplanned downtime per year,directly boosting production output.

 Related Product Combination Solutions:

UA50-30-00 1SBL351022R8000:Standard 3-pole capacitor contactor(without damping resistors)for low-inrush applications.Synergizes with UA50-30-00RA 1SBL351024R8000 in mixed-capacitor systems where some banks have lower surge levels.

1SBN083504R1000:A-Line<100A connection module.Enables quick,secure wiring between UA50-30-00RA 1SBL351024R8000 and A50/AX50 series components,reducing installation time by 25%.

CM-MPS.11S:ABB power monitoring module.Tracks UA50-30-00RA 1SBL351024R8000 operating cycles and current levels,enabling predictive maintenance.

AX80-30-11-80:ABB general-purpose contactor.Complements UA50-30-00RA 1SBL351024R8000 in systems requiring both capacitor control and motor switching.

S203M-K16:ABB miniature circuit breaker.Protects UA50-30-00RA 1SBL351024R8000 from overcurrent damage,forming a complete safety loop for capacitor banks.

UA63-30-00RA 1SBL351032R8000:Higher-power sibling(63A rating).Upgrades UA50-30-00RA 1SBL351024R8000-based systems for larger capacitor banks.

CL-Series Auxiliary Contact Block:Adds 1NO/1NC auxiliary contacts to UA50-30-00RA 1SBL351024R8000,enhancing system feedback for PLC integration.

  Installation,Maintenance,and Full-Cycle Support:

Installing UA50-30-00RA 1SBL351024R8000 requires minimal preparation:ensure the mounting surface is flat and dry,and verify capacitor residual voltage is≤50V before wiring.The block-type design fits standard DIN rails,and compatible accessories like the 1SBN083504R1000 connection module simplify terminations—most installations take under 30 minutes per unit.The contactor operates reliably in ambient temperatures from-5°C to 40°C,making it suitable for both indoor control cabinets and protected outdoor enclosures.

Routine maintenance is straightforward:inspect damping resistor connections quarterly for tightness and check contact wear annually(using the CM-MPS.11S monitor for data-driven checks).If faults occur(e.g.,delayed switching),replace the coil or resistor block—parts are readily available and require no specialized tools.ABB backs UA50-30-00RA 1SBL351024R8000 with a 1-year warranty and 24/7 technical support,including remote troubleshooting for quick issue resolution.

Our team can help design a complete capacitor control system tailored to your industry needs,combining UA50-30-00RA 1SBL351024R8000 with compatible protection and monitoring components.Contact us for a customized solution to enhance your power system’s reliability and reduce maintenance costs.

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