TECHNICAL USER´S MANUAL
16
Thyristor modules
•
FAULT LED is lit:
The module is in over-heating protection mode. Thermal protection is activated when the
hottest spot of the heat sink is above 90±5ºC. The over-heating fault will not reset until the
hot spot temperature is below 70±5ºC.
Make sure the modules are properly cooled.
1.
Make sure the 12kVAr and 25kVAr modules are vertically mounted on the
mounting plates. If the modules are not mounted vertically,
they must not be
powered up!
2.
If vertical mounting for 50kVAr and 80kVAr modules is not possible, then user
needs to ensure that cooling air is circulating properly and warm air is removed
from the panel. If the cooling fan is not activated while in over-heating status, then
please check the auxiliary power connections and make sure the module is
powered up properly. If the modules are powered up properly, then please
contact the technical service number provided in Section 7.
•
The module is triggered but the STATUS LED is not lit:
STATUS LED displays operating status of the module. If this LED is not lit up, then one of
the following four situations must be true:
1.
System is not powered up
2.
Trigger signal is not being received
3.
Capacitors are charged but not discharging properly
4.
System has a wiring error or is in overheating fault mode
First, make sure that the trigger signal is received by the module. To achieve this,
disconnect the REACTOR FAULT DETECTION connections and check to see if the REACTOR
FAULT DETECTION LED lights up when the trigger signal is applied. If the LED lights up, then
the trigger signal is properly received. Then reconnect the REACTOR FAULT DETECTION
connections. If the REACTOR FAULT DETECTION LED is lit, then the system is in reactor
overheating fault protection mode. If the FAULT LED is lit, then the module is in overheating
protection mode and user must wait until the temperature is below 70°C and take
precautions to improve the cooling efficiency. If the FAULT LED is blinking, then please refer
to the related topic under this section. If the POWER LED is on, but the FAULT and REACTOR
FAULT DETECTION LEDs are off, then please contact the technical service department at the
number in Section 7.
