Generator

Marelli Rotabloc RBT System with Marelli MJB 355

MarelliGenerator Alternator
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Model:MJB 355 MB4 B2
Rated Power: 900 kVA, 400V / 920 kVA, 440V
Active Power: 720 kW
Voltage: 400 V / 440 V
Frequency: 50 Hz / 60 Hz
Rated Current: 1155 A, 400V / 1207 A, 440V
Speed: 1500 / 1800 rpm
Power Factor: 0.8
Insulation Class: H
Weight: 1950 kg
Protection class: IP23
Bearings: 6317 C3
Lubrication: Mobil Polyrex EM

Rotabloc RBT Alternator (Flywheel-Based UPS)
Model Type: MJB-355
UPS Power Limitation: 500 kVA
Voltage Range: 400 V ±12.5%
Current: 722 A
Frequency: 50 Hz
Speed: 1500 rpm
Weight: 1950 kg
Manufactured in Belgium

Features & Benefits
Rotary UPS – No batteries required
Compact footprint with integrated cooling
Ideal for grid stability and critical systems
Reliable European engineering (Belgium & Italy)
CE marked, ready for international use
Low maintenance – no chemical batteries