TOYAMA TDMG25 Guia Del Propietario página 37

surges or
motor
AVR UFRO protection is activated.
starting
Parallel droop circuit incorrectly set
Load surges cause current to exceed 2.5
times of the full load current.
Voltage drop between generator and
load, due to I
be worse during current surges (e.g.
motor starting).
Motor contactors are dropping out during
starting, (large current surges, voltage
dips larger than 30%).
AVR stability
adjusted.
Fault of rectifier or excitation winding
Engine relief circuit activated during
motor starting.
AVR fault
2
R losses in the cable. It will
control is incorrectly
necessary.
Test the speed droop from no load to full load
is not larger than 4%. Inspect AVR led. If it is
lit, increase engine speed.
Too much droop will increase voltage dips
when motor starting. Fit shorting switch for
single running generators.
Test current with a clamp ammeter. Voltage
dip may be excessive if the current exceeds
2.5 times of full load. Refer to factory for
motor starting calculations.
Test voltage at both ends of the cables at full
load. In severe cases, a larger diameter cable
is need.
All causes and actions in this section may
apply to this problem. Refer to factory for
typical voltage dips.
Set AVR stability control for optimum
performance.
voltage is unstable, then slightly clockwise
until stable.
Test rectifier or excitation winding.
Check whether AVR DIP or DWELL engine
relief circuits
necessary. See AVR instructions for details.
Replace and re-test on load.
37
Adjust anticlockwise
are activated. Adjust
until
if