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The Gefran GFW-Xtra power controller combines the functionality of a single, two or three phase solid-state power unit and controller with the benefits of the unique integrated overcurrent fault protection function.

The fault protection eliminates the need for extra-rapid fuses, reducing machine downtime and the cost of replacing fuse failures. It does so by instantaneously monitoring load current, cutting the power if the load reaches a pre-set threshold and isolating the power switching devices.

In applications susceptible to intermittent short-circuits and overloads, the Gefran Xtra power controller can be programmed to restore power automatically when the fault has cleared, preventing complete process shutdown and maintaining production.

Alternatively, power can be manually restored, locally or remotely.

A soft-start ramp is applied when the current is restored, to prevent system damage in the event that the fault is not effectively cleared.

The GFW-Xtra controller is compact, modular and optimised to control virtually any type of restive heating system in a wide range of industrial applications. Impressive functionality is assured by a comprehensive array of options that are configurable with intuitive, guided-set-up, PC-based Windowstm software.

GFW-Xtra always provides an RS485 serial connection with Modbus RTU protocol to control currents, voltages, powers, load status, and device status from the supervisor terminal (HMI) or PLC.

A second (optional) communication port is offered that lets you choose from among the following Fieldbuses: Modbus RTU, Profibus DP, CanOpen, Modbus-TCP, Ethernet IP, EtherCAT.


  • Suitable for use in a wide range of applications including furnaces for heattreatment, high temperature materialsintering processes, glass and ceramic production
  • The integrated overcurrent fault protection provides complete heating process and system protection
  • Designed for Super Kanthal™ and silicon carbide single or three-phase heating systems
  • Operating current and voltage range up to 150A, 480V
  • Configurable in all control firing modes including zero crossing, half-single cycle and phase angle
  • Wide range of options to suit specific applications including transformer based heating systems
  • Comprehensive connectivity options including fieldbus, Modbus RTU/TCP, Profibus, EtherCAT, Ethernet IP and CanOpen

The Xtra feature in details

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General Overview
Power control
4.0 Gefran product catalog
GFW Xtra
Catalog Read Me
GF_eXpress ReadMe
GF_eXpress UserGuide
Installation and operation manual
SW - Programming and Configuration for GFW40…300A
Quick start guide - GFW Xtra
Memory map
Catalog ver. 2.91.0
GF_eXpress ver 2.1.39