GEFRAN GTF POWER CONTROLLER
Main features
• Current levels from 40A to 250A
• Rated voltage 480Vac, 600Vac and
690Vac
• Trigger configurable in “Zero crossing”
(Fixed Cycle, Burst Firing, Half
single Cycle) or “Phase angle”
• Analog control input, configurable in:
Volt, mA, potentiometer (digital in
PWM)
• Total and partial load interrupt alarm (HB)
(optional)
• Communication Modbus RTU, RS 485 2
wires (optional)
• Current limit (optional)
• V, I, P feedback (optional)
• Connections for monophase and triphase
applications (just in zero crossing”
mode)
• Configuration from PC (by USB – TTL
cable)
• CE, TÜV, UL Marking
Main applications
• Industrial furnaces for heat treatments,
metallurgy
• Fusion, sinterization, nitruration furnaces
• Furnaces for ceramics and precious
metals
• Dryers
• Heating systems with infrared lamps
(long-, medium-, short-wave)
• Wood edge banding Machines
• Plastic-blowing Machines
• Welding applications on Packaging
Machinery
• Thermoforming Machines
• Furnaces with Super Kanthal™ Silicon
carbide heating elements
Order-no.: F52.376
Manufacturer: GEFRAN
SAGATRON-no.: F52.376
• Current levels from 40A to 250A
• Rated voltage 480Vac, 600Vac and
690Vac
• Trigger configurable in “Zero crossing”
(Fixed Cycle, Burst Firing, Half
single Cycle) or “Phase angle”
• Analog control input, configurable in:
Volt, mA, potentiometer (digital in
PWM)
• Total and partial load interrupt alarm (HB)
(optional)
• Communication Modbus RTU, RS 485 2
wires (optional)
• Current limit (optional)
• V, I, P feedback (optional)
• Connections for monophase and triphase
applications (just in zero crossing”
mode)
• Configuration from PC (by USB – TTL
cable)
• CE, TÜV, UL Marking
Main applications
• Industrial furnaces for heat treatments,
metallurgy
• Fusion, sinterization, nitruration furnaces
• Furnaces for ceramics and precious
metals
• Dryers
• Heating systems with infrared lamps
(long-, medium-, short-wave)
• Wood edge banding Machines
• Plastic-blowing Machines
• Welding applications on Packaging
Machinery
• Thermoforming Machines
• Furnaces with Super Kanthal™ Silicon
carbide heating elements
Order-no.: F52.376
Manufacturer: GEFRAN
SAGATRON-no.: F52.376
General features
Category of use: AC51, AC55b, AC56a
Load type:
AC51 resistive or low-inductance loads
AC55b infrared lamp
AC56a transformers, resistive loads
with high temperature coefficient
Switch-on modes:
ZC Zero crossing constant cycle time
(1-200sec)
BF Burst Firing variable cycle time
(GTT) minimum or optimized
HSC Half Single Cycle corresponds to
Burst Firing that manages
Semi-cycles of on and off.
Useful to reduce flickering with
short-wave infrared loads
PA Phase Angle
Nominal voltage:
480Vac (max range 90-530Vac)
600Vac (max range 90-660Vac)
690Vac (max range 90-760Vac)
Nominal frequency: 50-60Hz
Non-repetitive voltage:
1200Vpk (models 480Vac)
1600Vpk (models 600Vac/690Vac)
Control analog input
Voltage: 0…5Vdc, 0…10Vdc
(impedence >100KΩ)
Current: 0…20mA, 4…20mA
(impedance 125Ω)
Potentiometer: from 1kΩ to 10k Ω
(auto-fed by 5V by GTF)
Digital inputs
Range 5-30V max 7mA
PWM input control: max 100Hz
(Configurable Features).
Voltage line range:
Range: 90… V_nominal_product
Frequency: 50-60Hz
Accuracy: 2% f.s
Current load range:
Range: 0… 2* I_nominal_product
Accuracy: 3% f.s
Sampling 0,2 msec
HB alarm output (optional)
The HB function detects partial or total
load interruption.
The control measures load current by means
of an internal device.
The current limit value is set via an automatic
procedure activated with the HB
button located near the upper connector.
The alarm output is obtained by means of
a solid relay, with normally open contact
(max 30V, 150mA, maximum conduction
resistance 15Ω).
Modbus RS485 serial (optional)
This option lets you connect the device to
a PC, PLC, HMI with a simple RJ10 telephone
wire, by using an RS485 serial
line with Modbus protocol.
The Baud-Rate is configurable from 1200
Baud to 19200 Baud.
A pair of rotary-switches lets you quickly
assign the node address.
A dip-switch near the rotary-switches lets
you internally insert the line termination
resistance. Isolation 300V
OUTPUTS
IsolationHV
Rated isolation voltage input/output:
4000Vac
GTF 25
Nominal current 25 Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 400 A
I2t for blowout: 450 A2s
dV/dt critical: 1000 V/μs
GTF 40
Nominal current 40 Arms @ 40°C in continuous
service.
Non-repetitive overcurrent t=10ms: 520 A
I2t for blowout: 1800 A2s
dV/dt critical:1000V/μs
GTF 50
Nominal current 50 Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 520 A
I2t for blowout: 1800 A2s
dV/dt critica: 1000V/μs
GTF 60
Nominal current 60Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 1150A
I2t for blowout: 6600 A2s
dV/dt critical: 1000V/μs
GTF 75
Nominal current 75Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 1150A
I2t for blowout: 6600 A2s
dV/dt critical: 1000V/μs
GTF 90
Nominal current 90Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 1500A
I2t for blowout: 11200 A2s
dV/dt critical: 1000V/μs
GTF 120
Nominal current 120Arms @ 40°C in continuous
service.
Non-repetitive overcurrent t=10ms: 1500A
I2t for blowout: 11200 A2s
dV/dt critical: 1000V/μs
GTF 150
Nominal current 150Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 5000A
I2t for blowout: 125000 A2s
dV/dt critical: 1000V/μs
GTF 200
Nominal current 200 Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms:8000A
I2t for blowout: 320000 A2s
dV/dt critical: 1000V/μs
GTF 250
Nominal current 250Arms @ 40°C iin continuous
service.
Non-repetitive overcurrent t=10ms: 8000A
I2t for blowout: 320000 A2s
dV/dt critical: 1000V/μs
Thermic Dissipation:
GTF models dissipate thermic power
based on load current:
Pdissipation = I_load_Arms * 1.3V (W)
For 150, 200, 250 A models with
integrated fuse, also consider dissipated
power at rated current shown on the fuse
table.
LED
N.5 LEDs indicator:
RUN (green)
STATUS (yellow)
ALARM (red)
DIGITAL INPUT (yellow)
ON / OVER-TEMP. (green / yellow)
Power supply (model GTF 25-120A)
24Vdc/Vac +/-25%
Input @ 25Vdc: max 100mA
Power: max 3VA
Maximum voltage insulation from control
signals: 300 V
Power supply (model GTF 150-250A)
24Vdc/Vac +/-25%
Input @ 25Vdc: max 450mA
Power: max 11VA
Maximum voltage insulation from control
signals: 300 V
Fan Power supply
(only for model GTF 120A):
24Vdc/+/-10%
Input @ 25Vdc: max 200mA
Ambient conditions:
Working temperature: 0-50°C (see the derating
curve)
Storage temperature: -20°C - +70°C
Max. relative humidity: 85% not condensing
Max. installation altitude: 2000m slm
Pollution level: 2
Category of use: AC51, AC55b, AC56a
Load type:
AC51 resistive or low-inductance loads
AC55b infrared lamp
AC56a transformers, resistive loads
with high temperature coefficient
Switch-on modes:
ZC Zero crossing constant cycle time
(1-200sec)
BF Burst Firing variable cycle time
(GTT) minimum or optimized
HSC Half Single Cycle corresponds to
Burst Firing that manages
Semi-cycles of on and off.
Useful to reduce flickering with
short-wave infrared loads
PA Phase Angle
Nominal voltage:
480Vac (max range 90-530Vac)
600Vac (max range 90-660Vac)
690Vac (max range 90-760Vac)
Nominal frequency: 50-60Hz
Non-repetitive voltage:
1200Vpk (models 480Vac)
1600Vpk (models 600Vac/690Vac)
Control analog input
Voltage: 0…5Vdc, 0…10Vdc
(impedence >100KΩ)
Current: 0…20mA, 4…20mA
(impedance 125Ω)
Potentiometer: from 1kΩ to 10k Ω
(auto-fed by 5V by GTF)
Digital inputs
Range 5-30V max 7mA
PWM input control: max 100Hz
(Configurable Features).
Voltage line range:
Range: 90… V_nominal_product
Frequency: 50-60Hz
Accuracy: 2% f.s
Current load range:
Range: 0… 2* I_nominal_product
Accuracy: 3% f.s
Sampling 0,2 msec
HB alarm output (optional)
The HB function detects partial or total
load interruption.
The control measures load current by means
of an internal device.
The current limit value is set via an automatic
procedure activated with the HB
button located near the upper connector.
The alarm output is obtained by means of
a solid relay, with normally open contact
(max 30V, 150mA, maximum conduction
resistance 15Ω).
Modbus RS485 serial (optional)
This option lets you connect the device to
a PC, PLC, HMI with a simple RJ10 telephone
wire, by using an RS485 serial
line with Modbus protocol.
The Baud-Rate is configurable from 1200
Baud to 19200 Baud.
A pair of rotary-switches lets you quickly
assign the node address.
A dip-switch near the rotary-switches lets
you internally insert the line termination
resistance. Isolation 300V
OUTPUTS
IsolationHV
Rated isolation voltage input/output:
4000Vac
GTF 25
Nominal current 25 Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 400 A
I2t for blowout: 450 A2s
dV/dt critical: 1000 V/μs
GTF 40
Nominal current 40 Arms @ 40°C in continuous
service.
Non-repetitive overcurrent t=10ms: 520 A
I2t for blowout: 1800 A2s
dV/dt critical:1000V/μs
GTF 50
Nominal current 50 Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 520 A
I2t for blowout: 1800 A2s
dV/dt critica: 1000V/μs
GTF 60
Nominal current 60Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 1150A
I2t for blowout: 6600 A2s
dV/dt critical: 1000V/μs
GTF 75
Nominal current 75Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 1150A
I2t for blowout: 6600 A2s
dV/dt critical: 1000V/μs
GTF 90
Nominal current 90Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 1500A
I2t for blowout: 11200 A2s
dV/dt critical: 1000V/μs
GTF 120
Nominal current 120Arms @ 40°C in continuous
service.
Non-repetitive overcurrent t=10ms: 1500A
I2t for blowout: 11200 A2s
dV/dt critical: 1000V/μs
GTF 150
Nominal current 150Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms: 5000A
I2t for blowout: 125000 A2s
dV/dt critical: 1000V/μs
GTF 200
Nominal current 200 Arms @ 40°C
in continuous service.
Non-repetitive overcurrent t=10ms:8000A
I2t for blowout: 320000 A2s
dV/dt critical: 1000V/μs
GTF 250
Nominal current 250Arms @ 40°C iin continuous
service.
Non-repetitive overcurrent t=10ms: 8000A
I2t for blowout: 320000 A2s
dV/dt critical: 1000V/μs
Thermic Dissipation:
GTF models dissipate thermic power
based on load current:
Pdissipation = I_load_Arms * 1.3V (W)
For 150, 200, 250 A models with
integrated fuse, also consider dissipated
power at rated current shown on the fuse
table.
LED
N.5 LEDs indicator:
RUN (green)
STATUS (yellow)
ALARM (red)
DIGITAL INPUT (yellow)
ON / OVER-TEMP. (green / yellow)
Power supply (model GTF 25-120A)
24Vdc/Vac +/-25%
Input @ 25Vdc: max 100mA
Power: max 3VA
Maximum voltage insulation from control
signals: 300 V
Power supply (model GTF 150-250A)
24Vdc/Vac +/-25%
Input @ 25Vdc: max 450mA
Power: max 11VA
Maximum voltage insulation from control
signals: 300 V
Fan Power supply
(only for model GTF 120A):
24Vdc/+/-10%
Input @ 25Vdc: max 200mA
Ambient conditions:
Working temperature: 0-50°C (see the derating
curve)
Storage temperature: -20°C - +70°C
Max. relative humidity: 85% not condensing
Max. installation altitude: 2000m slm
Pollution level: 2
POWER CONNECTION
SECTION CABLES RECOMMENDED
SECTION CABLES RECOMMENDED
DESCRIPTION OF CONNECTIONS GTF 25-120A
GTF 150-250A DESCRIPTION OF CONNECTIONS
GTF 150-250A DESCRIPTION OF CONNECTIONS
DERATING CURVES GTF
TEMPLATE DIMENSIONS
| Electricity | Operation (software configurable) | Integrated function | Communication | Included options | Type | Code |
| 25 A | Master | --- | --- | --- | GTF-25-480-0-0-0-0 1-B-M | F52.376 |
| 25 A | Master | HB-Alarm load failure | --- | --- | GTF-25-480-0-1-0-0 1-B-M | F53.125 |
| 25 A | Master | HB-Alarm load failure Border I_Pk, I_RMS Recirculation (P,V,I,V2,I2) |
--- | --- | GTF-25-480-2-1-0-0 1-B-M | F54.058 |
| 25 A | Master | HB-Alarm load failure Border I_Pk, I_RMS Recirculation (P,V,I,V2,I2) |
Modbus | --- | GTF-25-480-2-1-0-M 1-B-M | F52.299 |
| 40 A | Master | --- | --- | --- | GTF-40-480-0-0-0-0 1-B-M | F50.677 |
