INSTRUCTION
EN
CTR40
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
CTR40 is a proportional controller for electric heating with automatic
voltage adaption. CTR40 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.
CTR40 can control both symmetrical Y-connected 3-phase heaters
and symmetrical or asymmetrical Delta-connected heaters.
CTR40 is only intended for electric heating control. The control princi-
ple makes it unsuitable for motor- or lighting control.
CTR40 is intended for DIN-rail mounting.
Installation
Mount CTR40 on a DIN-rail in a cabinet or other enclosure.
Mount CTR40 vertically with the text right side up.
Protection class:
IP20.
Ambient temperature:
0 - 40°C
N.B. CTR40 emits approx. 70W 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 40A/phase.
N.B. The supply voltage to CTR40 should be wired via an all-pole switch
with a minimum contact gap of 3mm.
N.B. CTR40 must be earthed.
1
2 3 4 5 6 7 8 9
L1 L2 L3 L3 L2 L1
1 1
3
Figure 1: Wiring of supply voltage and load
Load
Terminals L1out, L2out and L3out.
Resistive 3-phase heater without neutral
Maximum load:
5290W/phase at 230V phase - phase voltage (40A).
9200W/phase at 400V phase - phase voltage (40A).
Minimum load:
530W/phase at 230V phase - phase voltage (4A).
920W/phase at 400V phase - phase voltage (4A).
Main sensor and external set-point (figs 2-5)
Terminals 1and 4. Low voltage. Not polarity sensitive.
N.B. Terminals 2 and 3 are internally connected and are used to simplify
wiring when using external setpoint.
N.B. Choice of internal or external setpoint is done using switch 1.
CTR40
1 2
3 4
SA-NTC15-01
1
2
Figure 2: Wiring of room sensor SA-NTC15-01 when using internal
setpoint
1 2
3 4
SAP-NTC15-01-3
1
3
Figure 3: Wiring of room sensor SAP-NTC15-01-3 used as
external setpoint and sensor
1 2
3 4
STCC-NTC15-02
Figure 4: Wiring of floor or duct sensor when using
internal setpoint
1 2
3 4
STCC-NTC15-02
2
3
SAP-NTC15-01-3
Figure 5: Wiring of external separate sensor when using SAP-
NTC15-01-3 as external setpoint
1