INSTRUCTION
i
Read this instruction before installation
and wiring of the product
TTC25X
Consult documentation in all cases where this symbol
is used, in order to find out the nature of the potential
hazards and any actions to be taken
1
TTC25X
Triac controller for proportional control
of electric heating
TTC25X is a proportional controller for electric heating with automatic
voltage adaption. TTC25X pulses the whole load On - Off. The ratio
between On-time and Off-time is varied 0 - 100% to suit the prevailing
heat demand. The current is always switched at zero phase angle to
prevent RFI.
TTC25X can control both symmetrical Y-connected 3-phase heaters
and symmetrical or asymmetrical Delta-connected heaters.
TTC25X is only intended for electric heating control. The control prin-
ciple makes it unsuitable for motor- or lighting control.
TTC25X is intended for DIN-rail mounting.
Control principle
TTC25X pulses the full load On - Off. TTC25X adjusts the mean
power output to the prevailing power demand by proportionally adjust-
ing the ratio between On-time and Off-time.
The cycle time (=the sum of On-time and Off-time) is adjustable 6...60
seconds.
TTC25X has zero phase-angle firing to eliminate RFI.
Installation
Mount TTC25X on a DIN-rail in a cabinet or other enclosure.
Mount TTC25X vertically with the text right side up.
Protection class
IP20.
Ambient temperature
0...40°C
N.B.
TTC25X emits approx. 45W of heat at full output which must be
dissipated.
Wiring
Supply voltage
Terminals L1in, L2in and L3in.
Supply voltage: 210...255 or 380...415V AC, 3 phase, 50...60 Hz with
automatic voltage adaption. Maximum current 25A/phase.
11
3
L1 L2 L3 L3 L2 L1
8 9
Figure 1: Wiring of supply voltage and load
N.B.
The supply voltage to TTC25X should be wired via an all-pole switch
with a minimum contact gap of 3mm.
N.B.
TTC25X must be earthed.
Load
Terminals L1out, L2out and L3out. Resistive 3-phase heater without
neutral.
Maximum load: 3300W/phase at 230V phase - phase voltage. 5750W/
phase at 400V phase - phase voltage.
Minimum load: 530W/phase at 230V phase - phase voltage. 920W/phase
at 400V phase - phase voltage.
Control signal
Terminals 8 and 9.
Terminal 8 = Signal neutral.
Terminal 9 = 0...10V DC.
0V input signal will give 0% output and 10V input will give 100% output.
1778F
MAR 14
EN
Figure 2: Wiring of control signal
NOTE:
Do not leave the input unconnected since an open circuit will
not give 0% output but approx. 50%. To ensure 0% output when no
control signal is connected, the control input should be short-circuited.
Settings
CT Cycle time. 6...60 seconds. The sum of one On-period and one
Off-period.
Start-up and fault finding
1. Check that all wiring is correct. Make sure the supply voltage is
switched off.
2. Measure the resistance between terminals L1out - L2out,
L1out - L3out and L2out -L3out: At 230V phase-phase voltage:
10.6
Ω
<R<64
Ω
. At 400V phase-phase voltage: 18.4
Ω
<R<115
Ω
.
3. Connect supply voltage and set the input signal to 10V DC. The
LED on the TTC25X should be continuously on. Set the control signal
to 0V DC. The LED should be continuously off. At intermediate posi-
tions the LED will pulse On-Off as the TTC25X pulses current to the
heater. The pulse cycle period is approx. 6...60 seconds depending
on the setting of the CT-potentiometer. Check with a clamp-on am-
meter that current is flowing to the heater.
Low Voltage Directive (LVD) standards
This product conforms to the requirements of the European Low
Voltage Directive (LVD) 2006/95/EC through product standard
EN 60730-1.
EMC emissions & immunity standards
This product conforms to the requirements of the EMC Direc-
tive 2004/108/EC through product standards EN 61000-6-1 and
EN 61000-6-3.
RoHS
This product conforms with the Directive 2011/65/EU of the European
Parliament and of the Council.
Contact
AB Regin, Box 116, 428 22 Kållered, Sweden
Tel: +46 31 720 02 00, Fax: +46 31 720 02 50
www.regincontrols.com, [email protected]