Operating principle

NORMAL MODE

• D1 and D2 are closed
• D3 is open
• The "STATO-ALTERNATOR" rotates at 1500 RPM and
  • Regulates downstream voltage
  • Supplies reactive power upstream
  • Eliminates micro cuts
  • Filters harmonics upstream and downstream in combination with the choke

MAINS FAILURE/EMERGENCY MODE

• D1 opens
• The inductive coupling is activated in order to maintain the frequency at 50Hz ± 1% during the transient period
• The engine starts
• The electromagnetic clutch is closed within 1 second after opening of D1
• When the engine reaches 1500 RPM it assumes the load
• The speed of the accu-rotor is brought back to 2600 RPM before acceptance of the mains

NB: In the event of an electrical starter failure, the engine start is forced by the synchronous machine within one second after opening of D1, which ensures a 100% guaranteed start of the engine.

MAINS RETURN

• Synchronization of the "NO-BREAK KS"® with the mains by closing D1 (when the accu-rotor reaches its rated speed)
• opening of the clutch
• diesel runs at no load for cooling and stops