Gefran GTZ 25, GTZ 40, GTZ 55 Data Sheet

Main applications

• Thermoforming

• Plastic extrusion lines

• Industrial ovens and

furnaces

• Heat treatments

• Control applications with

high switching speed

• Mold heating/cooling
control units

• Refrigeration

• Air conditioning

GTZ 25 / 40 / 55

THREE-PHASE SOLID STATE RELAYS WITH LOGIC CONTROL Vdc / Vac

Main features

• Control input from VDC/VAC logic signal

• 3-phase alternating current solid state

relay with integrated hestsink

• Zero crossing switching

• 3-phase nominal current

3x25/40/55A

• Nominal voltage up to 600VCArms

• Integrated SCR thermal protection
with LED signal

• Optional alarm output (for interrupted
load diagnostics or for SCR overtem­ perature

• Optoinsulation (input/output)
4000Vrms

• Integrated overvoltage suppressor

• Non-repetitive voltage up to 1200Vp

• Component selection to operate at

 max.declaredcurrentwith ≤40°C

temperature

• DIN bar mounting with fast clip-on

• In Conformity with EN60947-4-3 and

UL508

PROFILE

3-phase “zero crossing” power solid state
unit for control of resistive and inductive
loads, complete with aluminum heatsink
and DIN guide connection.
Integrated device designed for industrial
applications demanding control of high
power levels and frequent switching,
with loads up to 3x55A (AC51) at
400/480/600Vac.
Control is logic type (VDC or VAC), signa­led by LEDs.
Each phase is controlled by means of
semiconductors.
The constructive elements, special pro­duction process, and new, sturdy case,
provide excellent reliability and continuity
of service.
The device is sized for continuous opera­tion at nominal current at room tempera­ture of 40°C.
All versions are protected against overvol­tages and against junction overtempera­ture, with signal LEDs and (optional) solid
state alarm output.
An optional alarm output is available for
interrupted load diagnostics.
The device is supplied complete with
covers to protect against direct contacts
(covers are removable for wiring).
Accessories available: fuses, fuse hol-

ders, support for panel mounting, thermo­stats and fans.

TECHNICAL DATA

General features

Category of use: AC51, AC53a

Nominal voltage (Ue):
400Vac (max. range 24...440Vac) (TRIAC)
480Vac (max. range 24..530Vac) (SCR)
600Vac (max. range 24..660Vac) (SCR)

Nominal frequency: 50/60Hz

Peak voltage:
<800Vp for models with Ue=400Vac
<1200Vp for models with Ue=480Vac,
Ue=600Vac

Uninterrupted nominal service.

Critical dV/dt OFF-state:
500V/µs for models with Ue=400Vac
1000V/µs for models with Ue=480Vac,
Ue=600Vac

Switching voltage for zero

Activation time: ≤1/2 cycle

Deactivation time: ≤1/2 cycle

Potential drop at rated current: ≤ 1,4Vrms

IP20 protection

Weight:
GTZ 25:1100g
GTZ 40, 55:1350g

: < 20V

Control inputs

DC INPUT (Type “D”):

Voltage of command circuit (Uc): 5..32Vdc
Activation voltage: >4.5Vdc
Deactivation voltage: <3Vdc
Max. input: 18mA@5Vdc- 22mA@32Vdc
Max. reverse voltage: 36Vdc

AC INPUT (Type “A”):

Control voltage: 20...260Vac/Vdc
Activation voltage: > 15Vac/Vdc
Deactivation voltage: < 6Vac/Vdc
Current draw:
<= 8 mAac/dc@260Vac/Vdc
Additional fuse (3A max) shall be instal­led on the control input circuit.

Outputs

GTZ 25/...

Nominal current (Imax):
AC51: 3x25 A
AC53a: 3x5 A

GTZ 40/...

Nominal current (Imax):
AC51: 3x40 A
AC53a: 3x8 A

GTZ 55/...

Nominal current (Imax):
AC51: 3x55 A
AC53a: 3x15 A

Insulation

Nominal insulation voltage input/output:

2.5KV ac for models with Ue=400Vac

4KV ac for models with Ue=480Vac,
Ue=600Vac
Nominal impulse withstand voltage
(Uimp): 2500Vac

Ambient conditions

• Working temperature: -20°C...80°C

• Max. relative humidity: 50% to 40°C

• Max. installation altitude: 2000 slm

• Pollution level : 2

• Storage temperature: -20...85°C

• Class: A (industrial device)

• Suitable for use in pollution degree 2
environmental

Thermal protection

SCR temperature is constantly monitored
inside the device.
If the maximum temperature limit is
exceeded (T=110°C), current to the load
is interrupted and the yellow signal LED
lights up.

Options

Option -1
(Thermal protection alarm output).

The alarm output option activates closing
of an isolated contact (max 32VAC/VDC,
150mA, conducting resistance <=15
ohm) when it detects the following fault
condition: control signal active but SCR/
heatsink is in overtemperature (GTZ ther­mal protection)

Option -2
(Thermal protection alarm output and inter­rupted load).
Only for GTZ with Type “A” input.

The alarm output option activates closing
of an isolated contact (max 32VAC/VDC,
150mA, conducting resistance <=15 ohm)
when it detects the following fault condi­tions:

- Control signal active but no current in at
least one three-phase branch (interrupted
load)

- Control signal active but no power line
voltage (no line)

- Control signal active but SCR / heatsink
is in overtemperature (GTZ thermal pro­tection). Maximum delay in tripping of load
interrupt
alarm < 400ms.
Maximum length of wires between GS and
load for correct operation of load diagno­stics < 25m

Power supply

Fan supply (only for models GTZ 40/55A):
230Vac 14W (VEN90)
115Vac 14W (VEN91)
24Vdc 4W (VEN92)

Installation notes

Use the high speed fuses specified in the
catalog according to the connection exam­ple provided.
Applications with solid state power units
must also include an automatic safety
switch to cut out the load power line.

FACEPLATE DESCRIPTION GTZ with DC control (Models GTZ-xx/xx-D-x)

L1 : Phase 1 input
L2 : Phase 2 input
L3 : Phase 3 input
T1 : Phase 1 output

L1 L2 L3

GTZ 40/600-0-1

VEN-90 fan:230Vac

AC51: 40A 600Vac
AC53a: 8A 50/60Hz

T1 T2 T3

L1 L2 L3 A1+

T1T2 T3 A2-

Alarm

On

B1

B2
A1

5..32
Vdc

A2

T2 : Phase 2 output
T3 : Phase 3 output
A1 : Control signal (+)
A2 : Control signal (-)
B1 : Alarm output (option)
B2: Alarm output (option)
Led ON: Red led signal indicator
Led Alarm: Yellow led (alarm overtemperature junction)

FACEPLATE DESCRIPTION GTZ with AC control (Models GTZ-xx/xx-A-x)

L1 : Phase 1 input
L2 : Phase 2 input
L3 : Phase 3 input
T1 : Phase 1 output

L2 L3

L1

GTZ 40/600-0-1

fan:230Vac

VEN-90

600Vac

AC51: 40A
AC53a: 8A

50/60 Hz

Out-Al

T1 T2 T3

L2L1 L3

T2T1 T3

Alarm

A1+

A2-

B1

B2

A1

20..260 Vac

A2

On

T2 : Phase 2 output
T3 : Phase 3 output
A1 : Control signal (AC)
A2 : Control signal (AC)
B1 : Alarm output (option)
B2: Alarm output (option)
Led ON: Red led signal indicator
Led Alarm: Yellow led (alarm overtemperature junction)
Led OUT-AL: Red Led interrupted load alarm (with option 2 only)

For maximum reliability, the device MUST

50mm Max

80mm 8

be installed correctly in the panel in order
to have adequate heat exchange betwe­en the heatsink and the surrounding air
under conditions of natural convection.
Mount it vertically (max.10 inclination
from the vertical axis)

• Vertical distance between a heatsink
and the panel wall >100mm

• Horizontal distance between a heatsink
and the panel wall: 20mm at least

• Vertical distance between two heatsink:
300mm at least.

• Horizontal distance between two heat­sink: 20mm. at least
Check that cable raceways do not reduce
these distances; should it happen, mount
the GTZ overhanging from the panel, so
that the air can flow vertically on the heat­sink without obstables.

• Maximum surrounding air temperature
40°C (for UL).

• Open type equipment

• max. voltage limits and derivative of
transients in line, for which the solid state
unit has internal protection devices.

• presence of dispersion current < 10mA
(max. value with rated voltage and jun­ction temperature of 125°C).

Limits of use

• dissipation of thermal power of device
with restrictions on temperature of instal­lation site.

• requires exchange with outside air or
an air conditioner to transfer dissipated
power outside the panel.

• installation requirements (distances
between devices to guarantee dissipation
under conditions of natural convection)

TECHNICAL DATA OF THE MAIN CIRCUIT

Model Imax Ie (*)

[Arms]

GTZ 25/400 3x25 250 450
GTZ 25/480 3x25 400 645
GTZ 40/480 3x40 600 1010
GTZ 55/480 3x55 1150 6600
GTZ 40/600 3x40 600 1010
GTZ 55/600 3x55 1150 6600

(*) Ie = Nominal current (Standard CEI EN 60947-4-3)

Non-repetitive

overcurrent t=20ms [A]

DIMENSIONS

Models: GTZ-25/xx-x-x (25A) Models: GTZ-40/xx-x-x, GTZ-55/xx-x-x (40 and 55A)

127mm 127mm

30mm

L1 L2 L3

GTZ 25/400-0-1

AC51: 25A 400Vac
AC53a: 5A 50/60Hz

T1 T2 T3

L1L2 L3 A1+

T1 T2 T3 A2-

Alarm

On

B1

B2
A1

5..32
Vdc

A2

L1 L2 L3

GTZ 40/600-0-1
VEN-90 fan:230Vac

AC51: 40A 600Vac
AC53a: 8A 50/60Hz

T1 T2 T3

L1L2 L3 A1+

T1 T2 T3 A2-

Alarm

On

B1

B2
A1

5..32
Vdc

A2

I2t

[A2s]

8

30mm

100mm

Depth:

- Models GTZ-xx/xx-D-x : 150 mm

- Models GTZ-xx/xx-A-x : 158 mm