The “ GFW adv” series of microprocessor advanced solid state
power units controls high electric powers with different types of
heating elements, single-phase, biphase or triphase.
Current levels range from 40A to 250A, nominal voltage from
480 VAC to 600VAC.
The command input is configurable and accepts 0-10V, 0/4-
20mA signals, potentiometer, logic signals, including with PWM
modes for cost effective solutions.
The device can also be operated via Modbus RTU serial
communication, with IN/OUT chain connections facilitated by
plug-in RJ10 (telephone) connectors.
The several trigger modes are software configurable and
provide:
- ZC: Zero Crossing constant cycle time (settable in range
1-200sec), for conventional loads
- BF: Burst-Firing, Zero crossing with optimized minimum cycle
time, for systems with low thermal inertia, medium-wave IR
lamps
- HSC: Half Single Cycle Zero Crossing corresponds to Burst
Firing that manages single semi-cycles of conduction or stop
cycles, useful for short-wave IR lamps, reduces flickering and
limits generation of EMC noise on the power line (applied only
to single-phase load or open delta).
- PA: Phase angle control, useful for short-wave IR lamps,
transformer primaries. Completely eliminates flickering of load
filaments, but generates EMC noise on power line (harmonics).
Soft Start ramp functions can be assigned to these controls,
with options such as “current limit” that keeps current peaks at
power-on and RMS current level at full power under control.
Thanks to sophisticated Hardware and Software solutions, you
can precisely control different types of loads.
Phase angle control (the only control method that completely
eliminates IR lamp flickering), matched with current, voltage,
or load power feedback functions, let you confidently use
“critical” applications such as (for example), special resistors
such as special Super Khantal™ heating elements, Silicon
Carbide resistors, or transformer primaries either single-phase
or triphase.
GFW runs complete diagnostics of current, voltage, power, and
temperature levels:
Current Diagnostics:
- Total and partial load interrupt alarm
- Self-learn function of alarm limit for interrupted load
- Alarm for SCR in short circuit
- Alarm for load in short circuit or overcurrent
- Alarm for interrupted internal fuse
Voltage Diagnostics:
- Alarm for absence of phase
- Signal for incorrect rotation of 3 phases
(for triphase applications)
- Alarm for triphase line unbalance
Temperature Diagnostics:
- Measurement of power module temperature
- Alarm for over temperature of power module
- Measurement of power terminals temperature
- Alarm for over temperature of power terminals
- Alarm for absence of 24V supply to cooling fan
Power control with Soft start ramp limits load, optimizes the
consumptions and increases the load operating duration.
The internal resettable “electronic fuse” is an exclusive
option: it lets you avoid extra-rapid fuses and greatly reduces
machine downtimes and cost caused by looking for and
replacing such fuses.
Parameters can be configured from an optional keypad with
LCD screen that attaches magnetically to the front panel and
from PC with the GF_eXpress configuration kit, which lets
you save all parameters in a configuration file that is easy to
manage and to copy to other devices..
GFW always provides an RS485 serial connection (PORT1)
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, Devicenet, Modbus-TCP, Ethernet IP,
EtherCAT .
The section contains general information and
warnings to be read before installing, configuring and
using the controller.
1.2 G
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:
•Thermoforming
•Blowing
•Hotrunnersforinjectionpresses
•Texturizingoffibers
•Heattreatmentfurnaces
•Woodworkingmachines
•Glasstemperingfurnaces
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.
Attention: the description of programming and
configuration parameters are contained in the
“Programming and configuration” manual,
downloadable from the website www.gefran.com