Gefran GZ 10, GZ 25, GZ 40, GZ 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

GZ 10 / 25 / 40 / 55

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

Main features

• Control input from VDC/VAC logic
signal

• 3-phase alternating current solid state
relay

• Zero crossing switching

• 3-phase nominal current

3x10/25/40/55A

• 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

• In Conformity with EN60947-4-3 and

UL508

PROFILE

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 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.
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: heatsink, thermo­stats, fans, fuses and fuse holders.

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.

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

Isolation nominal voltage (Ui): 600Vac

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: < 20V

Activation time: ≤1/2 cycle

Deactivation time: ≤1/2 cycle

Potential drop at rated current:≤ 1,4Vrms

IP20 protection

Weight: 300g

Control inputs

I

R

- 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

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

Three-phase relay
Pd=3x1,4*IRMS [W]
IRMS= three-phase load current

Heatsink Thermal Resistance
Calculation

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 or Triangle closed control

R

L1

V

S

L2

T

L3

I

T1

R

R

T2

R

T3

R

R

R

V nominal = V

P

I nominal =

V

+10%

3 • V

Three-phase Star control with neutral

R

S

T

V nominal =

I nominal =

L1

T1

V

L2

T2

L3

T3

R

R

R

V

V

3

P

V

+10%

3 • V

Three-phase Triangle open control

L1

V

S

T

T1

R

L2

R

T3

L3

T2

R

V nominal = V

P

I nominal =

+10%

3 • V

TECHNICAL DATA OF THE MAIN CIRCUIT

Model Imax

[Arms]

GZ 10/400 3x10 1.78 3x10 1.19
GZ 25/400 3x25 0.57 3x25 0.38 250 450
GZ 25/480 3x25 0.57 3x25 0.38 400 645
GZ 40/480 3x40 0.36 3x40 0.24
GZ 55/480 3x55 0.19 3x55 0.16 1150 6600
GZ 40/600 3x40 0.36 3x40 0.24 600 1010
GZ 55/600 3x55 0.19 3x55 0.16 1150 6600

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

Rth,heatsink

@Ta=40°C

[K/W]

Ie (*)

[Arms]

Rth,heatsink

@Ta=40°C

[K/W]

Dimension

heatsink

(accessories)

100x127x80

100x127x100

(with fan)

Non-repetitive

overcurrent
t=20ms [A]

120 100

600 1010

I

I2t

[A2s]

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

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

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 condition:
control signal active but SCR / heatsink
is in overtemperature (GZ thermal pro­tection)

Option 2

(Thermal protection alarm output and
interrupted load).
Only for GZ 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 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

L1 L2 L3

T1 T2 T3

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

GZ 25/400-0-1

On

L1 L2 L3 A1+

T1 T2 T3 A2-

Alarm

B1

B2
A1

A2

5..32
Vdc

5,2mm

73mm

47,5mm

103,5mm

92mm

is in overtemperature (GZ 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

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 M5x10 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.

DIMENSIONS

• 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).

Depth:

- Model GZ-xx/xx-D-x : 44 mm

- Model GZ-xx/xx-A-x : 52 mm

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

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

L1 L2 L3

L1 L2 L3 A1+

GZ 40/600-0-1

fan:230Vac

VEN-90

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

T1 T2 T3

T1 T2 T3 A2-

Alarm

On

B1

B2
A1

5..32
Vdc

A2

T1 : Phase 1 output
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 GZ with AC control (Models GZ-xx/xx-A-x)

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

L1

GZ 40/600-0-1

VEN-90

AC51: 40A
AC53a: 8A

T1 T2 T3

fan:230 Vac

600Vac
50/60 Hz

Out-Al

L2 L3

A1+

L2L1 L3

A2-

T2T1 T3

Alarm

On

B1

B2

A1

20..260 Vac

A2