GZ 10 / 25 / 40 / 55
GZ 10 / 25 / 40 / 55
THREE-PHASE SOLID STATE RELAY WITH LOGIC CONTROL
Main features
• 3-phase alternating current solid state
relay
• Zero crossing switching
• 3-phase nominal current
3x10/25/40/55A
• Nominal voltage up to 600VCArms
• Control range: 5...32Vdc
• Optoinsulation (input/output)
4000Vrms
• Integrated overvoltage suppressor
• Non-repetitive voltage up to 1200Vp
• In Conformity with EN60947-4-3 and
UL508
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
PROFILE
TECHNICAL DATA
3-phase "zero crossing" solid state relay
for control of resistive and inductive
loads. Integrated device designed for
industrial applications demanding control
of high power levels and frequent
switching, with loads up to 3 x 55A
(AC51) at 400/480/600Vac.
Control is logic type (Vdc), 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. All versions are protected
against overvoltages and against junction
overtemperature, with signal LEDs and
(optional) solid state alarm output. The
device is supplied complete with covers
to protect against direct contacts (covers
are removable for wiring).
Accessories available: heatsink,
thermostats, fans, fuses and fuse
holders.
General features
WARNING: The GZ models must be
used in conjunction with an appropriate
heatsink (Accessory).
Installation must precisely observe the
warnings contained in the installation
notes.
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
Isolation nominal voltage (Ui):
600Vac
Peak voltage:
>800Vdc for models with Ue=400Vac
>1200Vdc 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:
< 20V
Activation time: ≤1/2 cycle
Deactivation time: ≤1/2 cycle
Potential drop at rated current:
≤ 1,4Vrms
IP20 protection
Weight: 300g
Control inputs
Voltage of command circuit (Uc):
5..32Vdc
Activation voltage: >4.5Vdc
Deactivation voltage:<3Vdc
Max. input:
18mA @5Vdc - 22mA @32Vdc
Max. reverse voltage: 36Vdc
Outputs
GZ 10/...
Nominal current (Imax):
AC51: 3x10 A
AC53a: 3x2 A
GZ 25/...
Nominal current (Imax):
AC51: 3x25 A
AC53a: 3x5 A
GZ 40/...
Nominal current (Imax):
AC51: 3x40 A
AC53a: 3x8 A
GZ 55/...
Nominal current (Imax):
AC51: 3x55 A
AC53a: 3x15 A
Thermal features
GZ 10,25
Junction temperature: ≤125°C
Rth junction/case =1.5 K/W
GZ 40
Junction temperature: ≤125°C
Rth junction/case =1 K/W
GZ 55
Junction temperature: ≤125°C
Rth junction/case =0.6 K/W
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
Solid Sate Relay Dissipated Power
Calculation
Heatsink Thermal Resistance
Calculation
Three-phase relay
Pd=3x1,4*IRMS [W]
IRMS= three-phase load current
Rth=(90°C-T.amb.max)/Pd
Pd = dissipated power
T.amb.max=max air temperature inside
the electrical cabinet.
Use a heatsink with thermal resistance
inferior to the calculated one (Rth)
Three-phase Star control with neutral
Three-phase Star or Triangle closed control
Three-phase Triangle open control
I
R
I
R
L1
T1
R
V
R
L2
L3
I
R
L2
T1
R
T2
T3
S
R
T2
R
L1
V
R
S
R
R
T
R
T1
V
R
S
L1
L3
L2
R
T
L3
T2
T3
R
T3
V nominal = V
I nominal =
V nominal =
P
+10%
V3 • V
I nominal =
V
V3
T
V nominal = V
P
+10%
V3 • V
I nominal =
P
+10%
3•V
TECHNICAL DATA OF THE MAIN CIRCUIT
Model
GZ
GZ
GZ
GZ
GZ
GZ
GZ
10/400
25/400
25/480
40/480
55/480
40/600
55/600
Imax
[Arms]
3x10
3x25
3x25
3x40
3x55
3x40
3x55
Rth,heatsink
@Ta=40°C
[K/W]
1.78
0.57
0.57
0.36
0.19
0.36
0.19
Ie (*)
[Arms]
3x10
3x25
3x25
3x40
3x55
3x40
3x55
Rth,heatsink
@Ta=40°C
[K/W]
1.19
0.38
0.38
0.24
0.16
0.24
0.16
Dimension
heatsink
(accessories)
100x127x80
100x127x100
(with fan)
Non-repetitive
overcurrent
t=20ms [A]
120
250
400
600
1150
600
1150
I2t
[A2s]
100
450
645
1010
6600
1010
6600
(*) Ie = Nominal current(Standard CEI EN 60947-4-3)
Ambient conditions
• Working temperature:
-20°C...80°C
• Max. relative humidity: 50% to 40°C
• Max. installation altitude: 1000 slm
• Pollution level : 3
• Storage temperature: -20...85°C
• Class: A (industrial device)
• Suitable for use in pollution degree 2
environmental
Thermal protection
Junction 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
An optional thermal protection alarm output is available. In this case, the alarm is
signaled with an output generated by a
solid state relay (max. 32 VAD/DC,
150mA, resistance ≤ 15Ω in alarm state)
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.
Protect the solid state relay by using an
appropriate heat sink (accessory).
The heat sink must be sized according to
room temperature and load current (see
the technical documentation).
Procedure for mounting on heat sink:
The module-heat sink contact surface
must have a maximum planarity error of
0.05mm. and maximum roughness of
0.02mm. The fastening holes on the heat
sink must be threaded and countersunk.
Spread 4 gram of thermoconductive
silicone (we recommend DOW
CORNING 340 HeatSink) on the
dissipative metal surface of the module.
The surfaces must be clean and there
must be no impurities in the
thermoconductive paste.
Use 4 M4x10 or M5 x 10 screws with
flexible washer for attachment. Alternately tighten the fastening screws until
reaching a torque of 0.60Nm.
Wait 30 minutes for any excess paste to
drain. Alternately tighten the four
fastening screws until reaching a torque
of 1.2 Nm for the M4 screws and 1.5 Nm
for the M5 screws.
It is advisable to make random checks of
correct installation by disassembling the
module and checking that there are no
air bubbles under the copper plate
Install the units cantilevered to the panel
so that air can flow vertically over the
heatsink without obstructions.
• Maximum surrounding air temperature
40°C (for UL).
• Open type equipment
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.
• 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).
FACEPLATE DESCRIPTION
L1
L2
L3
Alarm
B1
L1 L2 L3 A1+
B2
A1
GZ 25/400-0-1
AC51: 25A
AC53a: 5A
400Vac
50/60Hz
T1
L1 :
L2 :
L3 :
T1 :
T2 :
T3 :
A1 :
A2 :
B1 :
B2:
Led1:
Led2:
5..32
Vdc
T1 T2 T3 A2-
A2
T3 On
T2
Phase 1 input
Phase 2 input
Phase 3 input
Phase 1 output
Phase 2 output
Phase 3 output
Control signal (+)
Control signal (-)
Alarm output (+) option
Alarm output (-) option
Red led signal indicator
Yellow led (alarm overtemperature
junction)
DIMENSIONS
103,5mm
L2
L3
Alarm
B1
L1 L2 L3 A1+
47,5mm
73mm
L1
B2
A1
GZ 25/400-0-1
AC51: 25A
AC53a: 5A
T1
400Vac
50/60Hz
5,2mm
92mm
5..32
Vdc
T1 T2 T3 A2-
A2
T3 On
T2
Depth= 43,5 mm
CONNECTION EXAMPLES
Three-phase Triangle or Star connection (with and without neutral)
Phase R
Phase S
Phase T
Neutral
Ground
F1
F2
F3
*
I < 150mA
V
<30V
>110°C
Load
R
R
R
R R R
L1
L2
L3
Alarm
L1 L2 L3 A1+
R
R
R
B2
A1
GZ 25/400-0-1
AC51: 25A
AC53a: 5A
400Vac
50/60Hz
T1
B1
5..32
Vdc
T1 T2 T3 A2-
T2
T3 On
5-32Vdc
A2
Digital
output
Heatsink (accessory)
* Only in the version with option overtemperature alarm output
Controller
TYPE OF OPERATION
Voltage logic output control and protection activation of overtemperature:
Control input
red
red
yellow
yellow
red
t
LEDs indicator
Voltage on load
t
T1
T2
T3
t
On
Alarm output of
overtemperature
(optional)
Heatsink temperature > 110°C
On
t
(overtemperature detection)
TABLE OF TERMINALS AND CONDUCTORS
Model
Contact
area
(LxP)
screw type
Control terminal
(A1, B2, B1, B2)
Type of
Section. *
preisolated
conductor /
terminal
tightening torque
Power terminal
(L1, L2, L3, T1, T2, T3)
Type of
Contact
Section. *
preisolated
area
conductor /
terminal
(LxP)
tightening torque
screw type
10A
25A
6,3x9
M3
eye /
fork /
tip
min. 0.35 mm
max. 2,5 mm2
0,6 Nm Max
2
12x12
M5
eye /
fork /
tip
40A
min. 1 mm2
max. 10 mm2
(tip)
min. 1 mm2
max. 16 mm2
(eye/fork)
55A
1,5 - 2,2 Nm
(*) 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
10A
25A
40A
55A
Nominal section
cable on mm2
2,5
6
10
16
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, thermostats.
To choose accessories, see the section “Solid state relays - Accessories”.
ORDER CODE
GZ
/
-
-
MODEL
GZ
NOMINAL CURRENT
10Aac
25Aac
40Aac
55Aac
10
25
40
55
OPTIONS
0
None
1
Alarm output
thermal protection
NOMINAL VOLTAGE
400Vac
(only for models ≤ 25A)
400
480Vac
(only for models ≥ 25A)
480
600Vac
(only for models ≥ 40A)
600
INPUT
0
5...32Vdc
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 solid state relay 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 GZ group in the electrical panel containing the GZs.;
• size the heatsink adequately according to the indicated parameters.
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.
This device conforms to European Union Directive 2004/108/CE and 2006/95/CE as amended with reference to product:
CEI-EN 60947-4-3 (Low voltage switchgear and controlgear - Contactors and Motor-starters)

In Conformity with UL508
GEFRAN spa
via Sebina, 74
25050 Provaglio d’Iseo (BS)
Tel. +39 030 9888.1 - fax +39 030 9839063
Internet: http://www.gefran.com
DTS_GZ_11/08_ENG
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