Operating instructions

20
2.4 INDICATIONS
2.4.1 LED INDICATIONS
The LEDs on the front side signal the following states:
• ON green: operating indication, power supply controller board
red: RESET active
• CONTROL modulation percentage indication, flashing*
• LIMIT limitation is active, relay K2 switches*
• PULSE LOCK Controller Lock active, but load control is continued at pulse limits
(default value = 0)*
• FAULT fault present*
• OVERHEAT overheating of power section
(in case of ..HF types, check ventilator)*
* Default setting
Activation of the integrated semiconductor fuse may be signaled using the fault indicating relay K1
rest current, contactor, otherwise separate supply of the control device required). In case of power
controllers from model current 495A, additional signaling is performed via an indicator at the semi-
conductor fuse.
2.4.2 RELAY INDICATIONS K1-K2-K3
The Thyro-P power controller is fitted with three relays. Each of these relays has a change over
contact, in principle a value has been allocated in the event register. The default values for
parameter settings are listed in chapter 3.5 ERROR ACKNOWLEDGEMENT / DATA LOGGER.
The connection terminals are specified in chapter 4 EXTERNAL CONNECTIONS.
ALARM RELAY K1
The relay K1 is activated if a fault is detected in the system. The effective direction, whether it
should close or open in case of fault, may be set using the parameter Relay ON at message or
Relay OFF at message by using LBA-2 or Thyro-Tool Family. Which indications lead to switching of
the relay may also be set.
Recommendation: keep the default setting.
CONTROLLER RESPONSE
If the load resistance changes, for instance due to temperature effect, ageing or load fault, then the
values (depending on control type) effective on the load change as follows:
LOAD RESISTANCE LOAD RESISTANCE EFFECTIVE*
DECREASES INCREASES LIMITATIONS
CONTROL LIMIT P U
LOAD
I
LOAD
P U
LOAD
I
LOAD
TYPE
U U
rms max
larger = larger smaller = smaller I
rms max
P
max
U
2
(UxU) U
rms max
larger = larger smaller = smaller I
rms max
P
max
I I
rms max
smaller smaller = larger larger = U
rms max
P
max
I
2
(IxI) I
rms max
smaller smaller = larger larger = U
rms max
P
max
P P
max
= smaller larger = larger smaller U
rms max
I
rms max
without control larger = larger smaller = smaller U
rms max
I
rms max
P
max
* If one of the limits is exceeded, then the signaling relay K2 and the LED Limit react
(default values of parameter settings).
General modulation limit T
s
=T
s max
a=a
max
TAB. 1 BEHAVIOR IN CASE OF LOAD CHANGE