When your equipment is down due to an emergency or long lead times and you need custom heaters in a hurry, why wait? Southwest Heater & Controls offers rapid shipment on custom heaters and sensors that usually require 3-4 weeks lead time for delivery.

SCR Controls

Watlow Power Series SCR

SCR Controller Watlow Power Series controllers include single-phase and 3-phase models with field configurable phase-angle or zero cross firing for application flexibility.

On-board semiconductor fusing improves reliability by protecting the SCRs from heater short circuits.

Performance Features

Agency approved
50/60Hz independent operation
Serial communication with Modbus™ RTU protocol
On-board heater bakeout and control diagnostics
Electrically touch-safe package
Models 65 through 250 amp ratings
Up to 660V~(ac)
Microprocessor-based technology
Snap-fit on pre-mounted plate
Heater & control diagnostics capabilitie
Multizone capability

Watlow QPAC SCR

QPAC SCR Controller Watlow's modular QPAC Series SCR power controller features plug-in flexibility in 1-phase, 3-phase, 2-leg, and 3 phase, 3 leg.

A variety of transformers allows the QPAC to operate virtually anywhere in the world.

Performance Features

Available in ratings from 150-1000 amps
Ambient operating temperatures 0° to 50° (32° to 122° F)
Completely modular power controller
Burst firing, solid state contactor and phase-angle firing modes
High speed semiconductor fuses and RC snubbers
High capacity heatsinks for 50° C (122° F) ambient operation
Open heater or shorted SCR detector option
Standard models up to 300 amps
Agency approvals

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10610 Control Place
Dallas, Texas 75238
800-687-2220

Email: sales@swhc.com