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LS RG Thyristor Power Controller
Model: RG3-630
4-hour response · Pricing in SAR · Delivery across all KSA regions
RG3-630 — LS RG Thyristor Power Controller
The LS RG Thyristor Power Controller is a silicon-controlled rectifier (SCR) based power regulator designed for precise, stepless power control of resistive and inductive heating loads in industrial process heating applications. Available in single-phase and three-phase configurations from 16 A to 630 A, the RG3-630 three-phase model handles up to 630 A continuous current at 380–440 V AC, providing infinitely variable power control from 0 to 100% using zero-cross or phase-angle firing modes selectable per application. Zero-cross firing minimises EMI generation making it preferred for infrared heater and glass fibre annealing applications, while phase-angle firing provides faster response for precise temperature control in furnace and autoclave applications. The RG controller accepts 0–10 V, 4–20 mA, or potentiometer reference inputs and provides a 4–20 mA feedback output signal for PID loop integration.
The RG3-630 is built into a compact DIN-rail or panel-mount aluminium heatsink housing and incorporates a built-in line fuse, current transformer, and power-on LED indicator, reducing the external components required in a typical SCR panel build. Semiconductor fuses with the correct I²t rating are integrated to protect the SCR devices against short-circuit damage — a critical feature that eliminates the common field failure mode of unprotected thyristor stacks. The unit operates from -10°C to +40°C ambient, and forced-air cooling via the built-in heatsink fins maintains junction temperatures within safe limits at continuous rated current. Digital load current monitoring with configurable overcurrent trip provides process protection against heater element failures, reducing unplanned process shutdowns at manufacturing facilities.
Resistive and inductive heating applications are fundamental to Saudi Arabia's glass manufacturing, chemical processing, food processing, and petrochemical facility operations. The RG thyristor controller is specified for electric trace heating systems at ARAMCO oil export terminal pipelines where frost protection is not required but viscosity management heating is, and for electric heat-traced piping at SABIC chemical plants in Jubail where precise temperature maintenance of reactive chemical streams is critical for process yield and safety. Oven and furnace control at ceramics and glass factories in Riyadh and Jeddah industrial areas uses the RG series for its superior power control linearity compared to simple on-off contactors, reducing thermal stress on heating elements and extending element service life significantly.
Razz Middle East supplies LS RG thyristor controllers in single-phase and three-phase configurations from 16 A to 630 A for heating panel builders and process engineering companies across Saudi Arabia. SAR pricing with VAT-inclusive quotations is available within 4 hours of RFQ receipt. Our panel engineering team provides complete SCR panel design services including heatsink sizing, fusing calculations, and control wiring documentation for turnkey SCR heating panel supply. Two-year manufacturer warranty is included with all units.
Technical Specifications
Full specifications for the RG3-630
- Current Range
- 16–630 A (this model: 630 A)
- Voltage
- 380–440 V AC, 3-phase
- Firing Mode
- Zero-cross or phase-angle (selectable)
- Control Input
- 0–10 V / 4–20 mA / potentiometer
- Feedback Output
- 4–20 mA
- Ambient Temperature
- -10 to +40°C
- Built-in
- Line fuse, CT, overcurrent trip
- Enclosure
- Panel-mount aluminium heatsink
Key Features & Benefits
- Selectable zero-cross and phase-angle firing modes cover both EMI-sensitive infrared and resistance heating applications and high-speed temperature control furnace and autoclave duties from the same hardware.
- Integrated line fuse, current transformer, and semiconductor fuse protection reduces external component count and eliminates the common unprotected thyristor short-circuit failure mode.
- 0–10 V and 4–20 mA control inputs with 4–20 mA feedback output enable direct integration with PLC analogue outputs and PID controllers without signal conditioning hardware.
- Digital overcurrent trip with configurable threshold provides process protection against heater element open-circuit and short-circuit failures, reducing unplanned production shutdowns.
- Compact aluminium heatsink housing with built-in forced-air cooling fins maintains SCR junction temperature within safe limits at continuous rated current without external cooling fans.
- DIN-rail and panel-mount options in the same housing allow flexible panel layout for both compact DIN-rail panel designs and larger floor-standing power panels.
Industrial Applications in Saudi Arabia
- Electric heat tracing for viscosity management on heavy crude oil export pipelines at ARAMCO terminal facilities, where precise temperature control maintains flow characteristics without overheating.
- Trace heating on reactive chemical process pipelines at SABIC facilities in Jubail Industrial City, where phase-angle firing provides the precise ±1°C temperature control required for process safety.
- Industrial oven and furnace temperature control at ceramics and glass manufacturing facilities, where continuous variable power control reduces thermal cycling stress on heating elements.
- Food processing and sterilisation equipment heating circuits where clean power control meets food industry hygiene and precision temperature requirements.
- Autoclave and composite curing oven control in aerospace and advanced manufacturing facilities where programmable ramp-and-soak temperature profiles require precise stepless power adjustment.
Industrial Supplier in Saudi Arabia
Get a Quote for the LS RG Thyristor Power Controller
We respond within 4 business hours. Send model RG3-630 for competitive pricing in SAR with delivery across Saudi Arabia and the GCC.
Frequently Asked Questions — RG3-630
Common questions from buyers in Saudi Arabia and the GCC