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

TYPE OF OPERATION

10

20

30

40

50

60

70

I (A)

04080

T (ϒC)

25

40

55

ALARM OPTION – DC INPUT: FUNCTIONAL DIAGRAM:

THERMAL PROTECTION ALARM

IN DC control

________________________________________________

ON LED (red)

_______________________________________________

Alarm LED (yellow)

________________________________________________

Load Current

______________________________________________

Alarm output ON

______________________________________________

ALARM OPTION – AC INPUT: FUNCTIONAL DIAGRAM

THERMAL PROTECTION ALARM

INTERRUPTED LOAD ALARM

IN AC control

_________________________________________________

ON LED (red

_______________________________________________

Alarm LED (yellow)

________________________________________________

Out-Al LED (red)

________________________________________________

Load Current

______________________________________________

Alarm output ON

______________________________________________

IN AC control

_________________________________________________

ON LED (red

_______________________________________________

Alarm LED (yellow)

________________________________________________

T_SCR > 110°C

T_SCR > 110°C

T_SCR < 110°C

T_SCR < 110°C

DISSIPATION DIAGRAMS

Rated current curves based on room temperature.

Out-Al LED (red)

________________________________________________

Load Current

______________________________________________

Alarm output ON

_______________________________________________

Load failure

Load restored

CONNECTION EXAMPLES - GTZ with DC control (Models GTZ-xx/xx-D-x)

R

R

R

RRR

R

R

R

< 30V

V

I < 150 mA

F1

F2

F3

GTZ 25/60-D-1

50/60 Hz

600Vac

2/T1

AC51:25A

4/T2

1/L1

3/L2

6/T3

ON

A2

A1

B2

Alarm

5/L3

B1

246

A2-

135

A1+

5-32Vdc

AC53a: 5A

5-32 Vdc

+

-

20........260 Vac/Vdc

< 30V

V

I < 1 50 mA

F1

F2

F3

(* )

ON/OFF

Switch

A2

A1

B2

B1

2 4 6

A2

1 3

5

A1

20-260

nc

nc

On

4/T2

5/L3

1/L1

3/L2

Alarm

2/T1

6/T3

Out

Al

50/60 Hz

600Vac

GTZ 25/60-A-2

AC51: 25A
AC53a: 5A

Vac/Vdc

Three-phase Triangle or Star connection (with and without neutral)

Phase L1
Phase L2
Phase L3

Neutral
Ground

Load

Digital
output

(*)

Controller

* Only in the version with option overtemperature alarm output

CONNECTION EXAMPLES - GTZ with AC control (Models GTZ-xx/xx-A-x)

Phase L1
Phase L2
Phase L3

Neutral
Ground

Fuse 3A (max)

* Only in the version with option alarm output

TABLE OF TERMINALS AND CONDUCTORS

Model

GTZ 25...55A

with DC control

GTZ 25...55A

with AC control

Model

GTZ 25...40A

Contact area

(LxP)

screw type

6,3x9

M3

Plug connector

2/6 pins

I/O Control terminal

(A1, A2, B1, B2)

Type of

pre-insulated

crimp

connector

eye / fork / tip

Stripped wire

or tip

Wire section

(*)/ tightening

torque

min. 0.35 mm

max. 2,5 mm

0,6 Nm Max

min. 0.25 mm

max. 2,5 mm

0,5 Nm Max

Contact area

screw type

2

2

12x12

2

2

(LxP)

M5

Power terminal

(L1, L2, L3, T1, T2, T3)

Type of

pre-insulated

crimp

connector

eye / fork / tip

Ground terminal (see note)

Contact area (LxD) screw type Wire section (*)/ tightening torque

min. 1 mm

2

Area: 7x12 mm

Screw: self-threading 3.9x12 DIN7981

max. 16 mm

1,5-1,8 Nm

Wire section(*)

/ tightening

torque

min. 1 mm

max. 10 mm

2

2

(tip)

min. 1 mm

max. 16 mm

2

2

(eye/

fork)

1,5 - 2,2 Nm

2

2

2

GTZ 55A

Area: 12x12 mm

Screw: M5

(*) The max. sections specified refer to unipolar copper wires
isolated in PVC.
Note: For the ground terminal, you have to use an eye wire
terminal.
(LxP) = width x depth [mm]

The minimum acceptable nominal section based on the nominal
currents of the power solid state units is given below for copper
conductors isolated in PVC, under continuous operating condi­tions and at 40°C ambient temperature according to standards
CEI 44-5, CEI 17-11, IEC 408 in accordance with EN60204-1

Nominal current Nominal section cable on mm

10A 2,5

25A 6

40A 10

55A 16

2

min. 1 mm

max. 16 mm

2

2

2 - 2,5 Nm

Terminal covers

If an eye terminal lug is used, the terminal covers can be
removed more easily by inserting a Phillips screwdriver
(max. width 3.5 mm) into the side slots.
With the point of the screwdriver, widen the side of the
cover and raise it.

Insert the screwdriver
to facilitate opening of
the cover

ACCESSORIES

A wide range of accessories is available heatsink, fuses and fuse holders , current transformer, supports to guide DIN, thermo­stats.
To choose accessories, see the section “Solid state relays - Accessories”.

ORDER CODE

GTZ

/

- - -

MODEL

GTZ

NOMINAL CURRENT

25Aac

25Aac (*)

40Aac 40

55Aac 55

25

25B

NOMINAL VOLTAGE

400Vac (only for 25A
models and only with type

40

“D” input)

480Vac 48

600Vac

60

(*) Version with high melt energy (I²t) short circuit-proof using
a specific circuit breaker

FAN (for mod. 40A and 55A)

VEN-90

VEN-91

VEN-92

Fan 80x80x40
230V 14W

Fan 80x80x40
115V 14W

Fan 80x80x25
24Vdc 4W

OPTIONS

None

0

Alarm output

1

thermal protection

Alarm output for inter­rupted load diagnostics

2

and thermal protection.
(Available ONLY with
type “A” input)

INPUT

5...32Vdc

D

20 ... 260 Vac/Vdc

A

Please contact GEFRAN personnel for information on availability of codes.

GEFRAN spa reserves the right to make any kind of design or functional modification at any moment without prior notice

•WARNINGS

WARNING: this symbol indicates danger.

Read the following warnings before installing, connecting or using the device:

If the power solid state unit is used in applications with risk of injury to people, machines, or materials, auxiliary alarm devices must be
employed. It is also advisable to be able to check for tripping of alarms during normal operation;

• follow instructions precisely when connecting the heatsink;

• always use cables that are suitable for the voltage and current levels indicated in the technical specifications;

• DO NOT operate the device in rooms with dangerous (inflammable or explosive) atmosphere;

• During continuous operation, the heat sink can reach up to 100°C, and stays at a high temperature even after the device is turned off due to
thermal inertia; therefore, DO NOT touch it and avoid contact with electrical wires;

• do not work on the power part without first disconnecting electrical power to the panel;

• do not remove the cover when the device is powered!
Installation:

• ground the heatsink connected to the power module;

• power supply lines must be separated from device input and output lines; always check that the supply voltage matches the voltage indicated
on the device label;

• avoid dust, humidity, corrosive gases and heat sources;

• respect the installation distances between one device and another (to allow for dissipation of generated heat).

• to keep air in movement, we advise you to install a fan near the GTZ group in the electrical panel containing the GTZs.;
Maintenance:

• at regular intervals, check operation of the cooling fans and clean all air ventilation filters;

• repairs must be done out only by trained and specialized personnel. Cut power to the device before accessing internal parts.

• do not clean the box with solvents derived from hydrocarbons (trichloroethylene, gasoline, etc.). Using such solvents will compromise the

device’s mechanical reliability. Use a clean cloth moistened with ethyl alcohol or water to clean external parts in plastic.

Service:
GEFRAN has a service department.
The warranty excludes defects caused by any use not conforming to these instructions.

CSA

UL

Conformity N° TC RU C-IT.AЛ32.B.00422

Conformity C/CSA/US CoFC no. 70051156

In conformity to ECC 2004/108/CE and 2006/95/CE and following modification with reference to standard EN 60947-4-3 (Low
voltage equipment - AC Semiconductor starters and contactors)

In Conformity with UL508 - File: E243386

DTS_GTZ_01-2016_ENG