Datasheet

Solid-State Switching Devices for Resistive Loads
3RF29 Function Modules
SIRIUS power controllers for 3RF2
4/101
Siemens IC 10 · 2011
* You can order this quantity or a multiple thereof.
Illustrations are approximate
4
■ Overview
Power controllers for 3RF2 single-phase solid-state
switching devices
The power controller is a function module for the autonomous
power control of complex heating systems and inductive loads.
The following functions have been integrated:
• Power controller
for adjusting the power of the connected load.
Here, the setpoint value is set with a rotary knob on the module
as a percentage with reference to the 100 % power stored as
a setpoint value.
• Inrush current limitation:
With the aid of an adjustable voltage
ramp, the inrush current is limited by means of phase control.
This is useful above all with loads such as lamps or infrared
lamps which have an inrush transient current.
• Load circuit monitoring
for detecting load failure, partial load
faults, alloyed power semiconductors, lack of voltage or a
break in the load circuit.
Note:
With the phase control operating mode, a partial load fault is de-
tected by cyclic "scanning" of the load; the exact mode of oper-
ation is described in the data sheets!
Special versions:
deviations from the standard version
3RF29 04-0KA13-0KC0
During the teaching process the connected solid-state relay or
contactor is not activated; i.e. no current flow takes place. No
current reference value is stored. No part-load monitoring!
3RF29 ..-0KA1.-0KT0
No part-load monitoring!
■ Application
The power controller can be used for:
• Complex heating systems
• Inductive loads
• Loads with temperature-dependent resistor
• Loads with ageing after long-time service
• Simple indirect control of temperature
The power controller can be used on the instantaneously switch-
ing 3RF21 and 3RF23 solid-state switching devices (single-
phase). If only the full-wave operating mode is used, the power
controller can also be used on the "zero-point switching" solid-
state relays and contactors.
Power control
The power controller adjusts the power in the connected load by
means of a solid-state switching device depending on the set-
point selection. It does not compensate for changes in the mains
voltage or load resistance. The setpoint value can be predefined
externally as a 0 to 10 V signal or internally by means of a poten-
tiometer. Depending on the setting
of the potentiometer (t
R
), the control is carried out according to
the principle of full-wave control or generalized phase control.
Full-wave control
In this operating mode the output is adjusted to the required set-
point value changing the on-to-off period. The period duration is
predefined at one second.
Generalized phase control
In this operating mode the output is adjusted to the required set-
point value by changing the current flow angle. In order to ob-
serve the limit values of the conducted interference voltage for
industrial networks, the load circuit must include a reactor with a
rating of at least 200 µH.
■ Selection and ordering data
Rated operational current
I
e
Rated operational voltage
U
e
DT Screw terminals PU
(UNIT,
SET, M)
PS* PG
AV
Order No. Price
per PU
Power controllers
3RF29
Rated control supply voltage 24 V AC/DC
4 110 … 230 A
3RF29 04-0KA13-0KC0 1 1 unit 101
4A
3RF29 04-0KA13-0KT0 1 1 unit 101
20 A
3RF29 20-0KA13 1 1 unit 101
50 A
3RF29 50-0KA13 1 1 unit 101
90 A
3RF29 90-0KA13 1 1 unit 101
20 400 … 600 A
3RF29 20-0KA16 1 1 unit 101
50 A
3RF29 50-0KA16 1 1 unit 101
50 A
3RF29 50-0KA16-0KT0 1 1 unit 101
90 A
3RF29 90-0KA16 1 1 unit 101
Version DT Order No. Price
per PU
PU
(UNIT,
SET, M)
PS* PG
Optional accessories
3RF29 00-0RA88
Sealable covers
for function modules (not for converters)
B
3RF29 00-0RA88 1 10 units 101
© Siemens AG 2010