Watlow SCR Power Controls

Product Description

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. The QPAC modular controller from Watlow is a modular silicon controlled rectifier (SCR) power controller with plug-in features for flexibility. Bases are rated from 150 to 1000 amperes in one-phase, three-phase, two leg and three-phase, three leg configurations.

POWER SERIES™:

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.

• 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

QPAC

Modular SCR Power Controller for Custom Tailoring to the Application The QPAC modular controller from Watlow is a modular silicon controlled rectifier (SCR) power controller with plug-in features for flexibility. Bases are rated from 150 to 1000 amperes in one-phase, three-phase, two leg and three-phase, three leg configurations. A variety of transformers from 120 to 575VAC, along with 50/60Hz operation, enable the QPAC modular controller to operate in applications anywhere. Plug-in control cards set the QPAC’s SCR firing modes: solid state contactor, burst firing (zero cross) or phase-angle models and are available with a wide variety of options. High speed fuses are included to protect the SCR modular controller from short circuit currents. 200KA short circuit current rating (SCCR) prevents arc flash.

• 200KA short circuit current rating (SCCR) prevents arc flash
• Modular power controller offers a variety of plug-in transformers and controller cards
• Available in 150 to 1000 ampere ratings for large or medium size loads
• Available in solid state contactor, burst firing (zero cross) or phase-angle fired mode to meet most application requirements
• Rugged design for 122°F (50°C) ambient operation can be used in industrial applications with full rating of the power controller

Contact a Thermal Devices’ Sales Engineer for more information! Or, request a quote