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1.1
P
rofile
The Gefran GFW-Xtra power controller combines the functio-
nality 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 fai-
lures.
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 over-
loads, the Gefran Xtra power controller can be programmed to
restore power automatically when the fault has cleared, preven-
ting complete process shutdown and maintaining production.
Alternatively, power can be manually restored, locally or remo-
tely.
A soft-start ramp is applied when the current is restored, to pre-
vent 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 ran-
ge 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.
The section contains general information and
warnings to be read before installing, configuring
and using the controller.
2
1 • PRELIMINARY INSTRUCTIONS
1.2
GFW is single-zone advanced solid state power unit, extremely
compact, equipped with different optional functions; it offers an
exclusive combination of performance, reliability, and flexibility.
In particular, this new line of Gefran solid state relays is the
ideal solution for sectors demanding high performance and
continuity of service, such as:
• Metal heat treating furnaces
• Vacuum furnaces with graphite elements
• High-temperature furnaces
•
•
•
•
The modules Series GFW are based on an extremely versatile
hardware and software platform, with options to select the best
I/O configuration for your system.
GFW is used for the power control of single-phase, Dual-Phase
and 3-phase loads, including resistive loads with high and low
temperature coefficient, short wave IR lamps, or transformer
primaries.
G
D
eneral
escriPtion
Boosters for glass lines
Quick cutting on blow molding lines
Machines and lines with unwanted current peaks and arcs
"Fuse-free" solutions
Attention: the description of programming and
configuration parameters are contained in the
" P r o g r a m m i n g a n d c o n f i g u r a t i o n " m a n u a l ,
downloadable from the website www.gefran.com
80993B_MHW_GFW-Xtra_06-2018_ENG
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