I work at an oil refinery where we recently had a shut down on our cogen plant because a high voltage breaker tripped.The root cause failure analysis completed by my coworkers attributed the failure to use of an L.E.D. type pilot light in the trip circuit instead of an incandescent G.E. MB120.This particular trip circuit is rated at 135 volts dc. The reasoning was that a LED type lamp has zero resistance and the increased current flow caused a resistor in series with the socket to short allowing enough current to the trip coil to open the contactor. I would give my opinion but I do not want to prejudice any opinions by any one else
