JUMO 709062 TYA 202 - Three-Phase Power Controller Operating Manual - Manual (Page 82)

6 Special device functions
80 2012-12-31/00561073 [SCR power switch TYA202]
This results in double the current for the SCR power controller.
Old = old state of the heating element R
old
=
New = new condition of the heating element
The relationship is illustrated by the following formula:
P control is also used for free-running economy circuits running off a 3-phase
supply network.
Which
operating mode
is suitable for
which load?
R
old
4
---------
P
new
U
new
I
new
•
U
old
2
---------
2I
old
• U
old
I
old
• P
old
= = = =
(12)
Operating mode Resistive load Inductive
load
TC constant TC positive TC nega-
tive Long-
term ag-
ing
Burst-firing mode X
Burst-firing mode with
α
start
X X
Burst-firing mode with
current limiting X X X
Subordinate control
U
2 X X X
I
2 X X
P X X