aelectricalman
Senior Member
- Location
- KY
So, in past conversations I have mentioned a particular drive system which was at 4160V having exploded due to harmonic issues inflicted on the system from a utility source. The capacitors in the drive unit for this 2000 HP drive ruptured (through routine maintenance) and the debris was sucked through the system by a line side vent fan. The result was the transformers, capacitors and for that matter, the building, burned.
The old Harmony Robicon VAC drive was replaced with a Toshiba T300MVI system. This new system operates using diode rectifiers and eliminates the capacitors.
The harmonic source that is affecting the system in only elevated outside of IEEE 519-2014, on the 5th order (6-8% average) and 7th order (3-5% average).
My question is, understanding that this could destroy a capacitor arrangement if a parallel resonance exists...
what can happen to the new type of system. How tolerant are diode rectification techniques in drive systems? Should I worry? Also, are traditional remedies (reactors) the best way to mitigate harmonics for this type of drive system?
Thanks for your help, as always.
The old Harmony Robicon VAC drive was replaced with a Toshiba T300MVI system. This new system operates using diode rectifiers and eliminates the capacitors.
The harmonic source that is affecting the system in only elevated outside of IEEE 519-2014, on the 5th order (6-8% average) and 7th order (3-5% average).
My question is, understanding that this could destroy a capacitor arrangement if a parallel resonance exists...
what can happen to the new type of system. How tolerant are diode rectification techniques in drive systems? Should I worry? Also, are traditional remedies (reactors) the best way to mitigate harmonics for this type of drive system?
Thanks for your help, as always.