Microprocessor-Based SCR Power Control Designed for Application Flexibility

Watlow has manufactured solid state power controllers for over forty years. Watlow's POWER SERIES™ is a microprocessor-based product that features application flexibility unmatched by any other silicon controlled rectifier (SCR) power and solid state controller on the market today.

Watlow's POWER SERIES solid state controllers include single- and three-phase models from 65 to 250 amperes. Field configurable phase-angle or zero-cross firing improves application flexibility on-site where needed.

50/60Hz independent operation allows utilization almost everywhere in the world without special calibration considerations. Serial communication via Modbus® RTU allows setup and monitoring of load status from a computer station or control room.

On-board semiconductor fusing improves reliability by protecting the SCRs from heater short circuits. Plus, on-board heater bakeout and control diagnostics can help eliminate initial start up problems. All these benefits are in a touch-safe package that can be quickly and easily mounted in a control cabinet.

Watlow's POWER SERIES solid state controllers are UL® listed and C-UL® recognized, ensuring that they meet world safety and operational standards.

Features & Benefits

200KA short circuit current rating (SCCR) prevents arc flash

Snap-fit on a pre-mounted plate simplifies installation

Available in 65 to 250 amperes ratings to handle a wide range of loads

Adjustable soft start provides application flexibility

Heater and control diagnostics capability monitors actual heater and controller performance

Electrically touch-safe package

Enhances safety for installer and users

Serial communications with Modbus® RTU protocol

Provides computer control and/or monitoring

Multizone capability

Increases application flexibility and reduces panel space


Description Information
Mounting Back panel
Profiling No
Max Output 250A
Output Firing Zero Cross, Phase Angle
Phase Configurations 1 or 3
Ambient Operating Range 0 to 85°C (32 to 185°F)
Agency Approvals UL®, C-UL®, CE, SCCR
Communication Protocols Modbus® RTU
TRU-TUNE®+ Adaptive Control No
Remote Limit Reset No
Warranty (Years) 3

Related Documentation

  • User Manuals

    Cross Reference for Semiconductor Fuses and Holders for Watlow Power Controllers

    Power Series

  • Agency Approvals

    CCC Winona Exemption Letter

    Agency Approvals for Watlow Controllers

  • Brochures

    SCR Power Controllers

  • CAD Drawings

    Power Series 3D file in Solidworks

    Power Series 3D file in Step

    Power Series Back Plate in AutoCAD 2000

    Power Series Back Plate in CorelDRAW x5

  • Training and Education

    Current Limit function - Oscilloscope Video

    Phase Angle function - Oscilloscope Video

    Heater Bakeout Function - Oscilloscope Video

    Soft Start Function - Oscilloscope Video

    Variable Time Base Zero Cross Function - Oscilloscope Video

  • Catalogs

    Controller Catalog (Section) - Power Switching Devices

    Sensor & Controller Catalog

  • Software & Demos

    Comm7 - Communication Diagnostic Software ver.7

    Sample Modbus Communications Modules for Programmers

    SpecView SCADA Software Download

    WATVIEW HMI Software Download

  • Specification Sheets

    POWER SERIES Controllers

    Communication Adapters

    Silver Series EM Operator Interface Terminal

    SpecView SCADA Software

  • White Papers

    Power Series Quick Configuration

    Power Series Quick Configuration Procedure

    SCCR - Short Circuit Current Rating for Watlow Power Controls

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Quality Certificates

ISO 90012008 Certificate - Controllers Winona