Small generators like this draw their excitation power from the output of the generator, have no AVR, nor any Boost capability i.e., their voltage falls as the load increases. Low power single phase alternators often have simple excitation systems that use the output of the alternator to provide the field current, and are incapable of supplying high inrush current loads. What type of loads are you trying to connect? If they are highly inductive or involve any type of high inertia loads, then your generator may not be able to provide enough starting torque or voltage support to successfully start them. There's a whole truck load full of other reasons why this could happen. Mechanical issue such as fuel injection clogged or fuel filters clogged causing the machine to be under fuelled to handle load application and may cause machine to slow down, which in turn would drop Hertz and Volts.ħ). In this condition you'd probably also see exhaust black stacking.Ħ). Mechanical issue such as failing turbo unable to provide enough air of high enough pressure while taking on load which will cause machine to slow down and in some cases stall on high load application with sufficient reduction in speed voltage will also lower as well as frequency. Speed control gain set too low to respond to load being applied.ĥ). If AVR feedback is from generator bus VT and voltage dips too far, all excitation could be lost and would typically result in an undervoltage and overcurrent trip.Ĥ). AVR Voltage gain set too low to respond to load being applied.ģ). Load applied to generator exceeds capacity, typically would cause machine to slow down, drop frequency and voltage typically cause exhaust black stacking and depending on the overload and protection settings could cause machine to stall.Ģ).
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