TTC2000 I
TTC2000
Triac controller for electric heating
3 phase 230V or 400V, 25A
Section position
1-300
Mar 02
TTC2000 is a controller for controlling 3-phase electric heating batteries. TTC2000 is a controller which provides
a high degree of versatility at a reasonable price.
Minimum and maximum limits adjustable.
TTC2000 is a complete controller for use with
Regin temperature sensors.
TTC2000 can be controlled by a 0... 10 V
signal from another controller.
The same unit for 3-phase 230V and
3-phase 400V. Automatic voltage adaption.
Can control both star-connected and delta-
connected loads.
PI-control for constant supply air temperature
control and P-control for room temperature
control with automatic function adaption.
Function
TTC2000 is a 3-phase triac controller for controlling
electric heating up to 25 A. It is made for wall mounting.
TTC2000 is to be connected in series between power-
supply and an electric heater and can control both
Y- and Delta- connected loads. TTC2000 can control
assymetrical Delta-loads.
Function
The controller pulses the entire power output ON/OFF.
The controller utilises time-proportional control, the
ratio between On-time and Off-time is varied to t the
prevailing heating requirement. E.g. ON = 30 sec. and
OFF= 30 sec. gives 50% output power.
The cycle-time (the sum of on-time and off-time) is
adjustable 6...120 sec.
This control accuracy contributes to reduced energy costs
and to the increased comfort of an even temperature.
Since the current is switched by semi- conductors (triacs)
there are no moving parts that can wear out. The current
is switched at zero phase angle, wich eliminates network
disturbance.
TTC2000 automatically adapts control mode to suit the
dynamics of the controlled object.
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Supply air temperature control
For rapid temperature changes, TTC2000 will work as a
PI-controller with a xed proportional band of 20K and
a xed reset time of 6 minutes.
Room temperature control
For slow temperature changes, TTC2000 will work as a
P-controller with a xed proportional band of 1.5 K.
When running room temperature control the supply air
temperature can be maximum and/or minimum limited.
Controlling larger electric heaters
At larger loads TTC2000 can be combined with ancillary
board TT-S1 (see below) or step controllers TT-S4/D or
TT-S6/D (See separate leaet).
TT-S1
The power handling capacity can be increased by using
the TT-S1 relay control board.
On increasing heat demand the TTC2000 will primarily
activate the triac controlled output. When this is running
at full output the TT-S1 relay output will be activated and
the triac controlled output will be reduced.
For best control the two part loads must be of equal
size. For wiring diagram and more information, see the
instructions for the TT-S1.