Subsubsection Inverter Local Contol (ILC)
The ILC cubicle contains instrumentation to measure the DC link voltage, output current measurements, and the DC link grounding switch.
This module also protects the inverter and DC bus from damage caused by the propulsion motors when the ship is slowing down. During these periods the momentum of the ship will drive the propellor and motor, causing the motors to behave like generators and produce electrical power.
Excessive electrical power cannot be fed back into the electrical distribution system, so when the DC bus reaches a certain voltage, the excess energy is shunted through a chopper unit to braking resistors. The braking resistors are located near the converter rooms, and are capable of dissipating up to 10 MJ for 20 seconds once every 30 minutes
