MK 30 Automatic Voltage Regulator
MK 30 Automatic Voltage Regulator
(OP)
We have 3 66/11 kV system transformers (18.8/27MVA) connected in parallel. Each transformer 11kV side have tap changer to keep the voltage at 11kV. I am wondering why some of automatic voltage regulator (MK 30) failed (indicated on it display screen), hence no automatic voltage regulation if the failed MK 30 is the MASTER? Is it due to the bandwidth setting or other things like load or noise that cause it to fail to regulate the voltage? When this happen we just reset the MK 30 and put in the setting and it function like normal again. The bandwidth setting is 1% (the transformer tap size is 1.25%), U<=80%, U>=108%, I>= 110%(not used). Anyone have similar experience??
Thank you.
Thank you.






RE: MK 30 Automatic Voltage Regulator
Reinhausen's repair service is quite reasonably priced from my experience and does tend to find the fault more often than not. Send the offending item back with a detailed description of the fault, plant configuration, and any additional information you have. The more detail you send back with the unit, the better the chances of a successful fix.
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RE: MK 30 Automatic Voltage Regulator
You might want to upgrade to a newer technology voltage regulator electronics. For the size of your facility the cost is trivial compared to malfunctions.
What kind of load are you running that requires an 81 MVA bus? Usual practice at this power level is to keep each secondary bus separate except when transferring load from one bus to another.
RE: MK 30 Automatic Voltage Regulator