Reliable STT293 - Operating Principle

STT293 CONCISE TOWER CRANE MANUAL
-50- EURC1.0ENG
2.3. OPERATING PRINCIPLE
The LFV frequency controlled system allows conversion of the 3-phase
supply (through an AC transformer) to a frequency controlled supply
voltage.
Schematic electric diagram:
XL Joystick
PLC Programmable logic controller
Lfa Brake
PG Transformer
LM Hoisting motor frequency converter
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