18
W24, E24 Electrode current too high
Function:
monitoring of the heating current (Phase L1)
Procedure:
if a overcurrent is detected the main contactor is switched off
immediately, a draining is carried out and the Warning W24 is triggered.
Subsequently, the main contactor is activated again. If overcurrent occurs
again, the process is repeated. After 15 drainings the error E24 is triggered
if the current could not be reduced.
The overcurrent monitoring serves for the recognition of slow rising over-
currents. The threshold of 125 % refers to the maximum nominal current.
If however the steam demand drops quickly, so called correction drainings
are carried out with this function, in order to achieve the new working point
faster. The overcurrent is analysed only if the current value determined by
the current measurement is valid, i.e. the software related RC element is
loaded. It takes up to 8.25 seconds until the overcurrent monitoring can be
released.
Behaviour on activation:
Warning
Error
Display
W24A(B): Over Current
E24A(B): Over Current
LED display:
-
Red lights
Fault-Remote:
-
Error Relay
Error-History:
-
E24A(B)
System:
Unit is draining
Unit blocked
Time delay:
-
15 drainings
(Time see table)
Reset:
automatic reset
Unit Off/On
Cylinder type
Draining time
5xx/8xxx
4 seconds
15xx
6 seconds
23xx
8 seconds
32xx/45xx/65xx
12 seconds
