Regin TTC25X Instruction Manual

INSTRUCTION
EN
TTC25X
i
Read this instruction before installation
and wiring of the product
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
Triac controller for proportional control of
electric heating
TTC25X is a proportional, 3-phase electric heating controller with
automatic voltage adjustment. The controller operates through step-
less, time-proportional control, where the relationship between the
on-time and off-time is based on the current heat demand.
The controller can control both symmetrical Y-connected 3-phase
heaters and symmetrical or asymmetrical Delta-connected heaters.
TTC25X is only intended for control of electric heating. The control
principle makes it unsuitable for control of motors or lighting.
The controller is intended for DIN-rail mounting.
Technical data
Supply voltage 210...255 / 380...415 V AC 3-phase,
50...60 Hz with automatic voltage adaptation.
Max. current: 25 A/phase.
Max. load 3300 W/phase at 230 V line voltage (25 A)
5750 W/phase at 400 V line voltage (25 A)
Min. load 530 W/phase at 230 V line voltage (4 A)
920 W/phase at 400 V line voltage (4 A)
Protection class IP20
Ambient temp. 0...40°C, non-condensing
Installation
Mount TTC25X on a DIN-rail in a cabinet or other casing.
Mount the controller vertically with the text right side up.
NOTE: At full power, TTC25X will emit approx. 45 W of excess
heat which must be properly dissipated!
Wiring
Connect the supply voltage to the terminals L1in, L2in and L3in.
L1 L2 L3 L3 L2 L1 1 1 3
Figure 1: Wiring of supply voltage and load
NOTE: The controller must be grounded and the supply
voltage must be interlocked via a high temperature limit switch!
Load
Use terminals L1out, L2out and L3out.
Resistive 3-phase heater without neutral connection.
Control signal (figure 2)
Use terminals 8 and 9.
Terminal 8 = Signal neutral.
Terminal 9 = 0...10 V DC.
0 V input will give 0 % output and 10 V input will give 100 % output.
TTC25X
Figure 2: Wiring of control signal
Settings
CT
Control principle
• TTC25X pulses the entire load On-Off.
• The controller will adjust the mean power output to the current
power demand by proportionally adjusting the On-time and Off-
time ratio.
• The pulse period (= the total sum of the On-time and Off-time) is
settable 6...60 seconds by using the potentiometer.
• TTC25X uses zero phase-angle firing to eliminate radio frequen-
8 9
cy interference.
Start-up and fault finding
1. Begin by switching off the supply voltage. Next, ensure that all
wiring has been performed correctly.
2. Measure the resistance between terminals L1out - L2out,
L1out - L3out and L2out -L3out:
At 230 V line voltage: 10.6 Ω <R <66.4 Ω.
At 400 V line voltage: 18.4 Ω <R <115 Ω.
3. Switch on the supply voltage and set the control signal to 10 V
DC. The LED should be continuously on. Set the control signal
to 0 V DC. The LED should be continuously off.
4. At an intermediate position the pulsing of the LED will perfectly
coincide with the controller pulsing current to the heater. The
pulse cycle time is 6...60 seconds depending on the settings of
the CT potentiometer. Use a clamp-on multimeter to ensure cur-
rent is passing to the heater when the LED is lit.
8 9
0...10 V DC in
0
NOTE: Do not leave the input unconnected, since an open
circuit will not give 0 % output, but approx. 50 %. To ensure
a 0 % output with no control signal connected, the input
should be short-circuited.
Pulse period. 6...60 seconds. The sum of one On-period
and one Off-period.
1