1 - Schneider Electric SNB

Solutions / Malfunctions
Electronic speed controller
Distribution transformer
OBSERVED MALFUNCTIONS
• Heating of the distribution transformer possibly resulting in its destruction.
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2
PROPOSED ACTIONS
Origin: conducted interference, harmonic currents
(1) Design the transformer to take account of the RMS currents consumed by all
devices that generate harmonic currents (electronic speed controllers, etc.)
instead of the nominal load currents (motors, etc.).
(2) Insert line inductances on the speed controller input (upstream)
(3) Insert an anti-harmonic filter at the line head (downstream of the transformer).
Recommended
implementation
(See chapter 2)
(p. 56)
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Te
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