- A charging unit for forklifts is to be protected against overheating. The charging current is high at the beginning of the charging process, and the charger is to be cooled with a fan.
- On the primary side, the current consumption of the charger is monitored. If the set threshold is exceeded, the output relay is tripped and switches the fan on. When the charging current falls (maintenance charge), the fan is switched off.
- - Simple implementation
- Protects the charger
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