Step Size Detection:
At each switching operation, step size is measured (except this function
is not active SETUP / 300
"
Referencebook)
Because of this setting of c/k value is not necessary. Switching sequence
is defined automatically by using the selectied capacitors.
The recognised values are taken to stepdatabase. A derating of
capacitors can be seen there.
Is there no function of a step during the first 3 switching operations after
a reset of stepdatabase, steptype
Foff
is set automatically.
Defective Steps:
When a step is switched 3 times in series without measured size, it is
detected as defective and it is blocked for 24h.
Step state:
blinking
Status:
Flty, step is blocked
Failure analysis:
After commissioning, all steps have step type Foff:
Is short link of CT secondary removed?
Is position of CT correct?
Are all fuses present and in order?
In normal operation, one or more steps are blinking?
How is condition of fuses, contactors and capacitors of this step.
Reset in SETUP / 100 / OUt or by re-start (interruption of supply
voltage) of BLR-CX!
