Voltage StabiliserMarelli
Rotabloc RBT System with Marelli MJB 355
Voltage Stabiliser
Marelli
Rotabloc RBT System with Marelli MJB 355
Year of construction
2016
Condition
Used
(fully functional)
Location
London 

Machine data
- Machine type:
- Voltage Stabiliser
- Manufacturer:
- Marelli
- Year of construction:
- 2016
- Condition:
- used
- Functionality:
- fully functional
Price & Location
- Location:
- Shelton Street 71-75, WC2H 9JQ London, United Kingdom

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Technical details
- Overall weight:
- 2,000 kg
- Color:
- black
- Power:
- 720 kW (978.93 HP)
- Output voltage:
- 400 V
- Output frequency:
- 50 Hz
- Continuous power (apparent):
- 800 kVA
Details about the offer
- Listing ID:
- A195-23381
- Update:
- 18.05.2026
Description
Containerized Rotary UPS System Featuring Marelli Generator MJB 400 LB4 B2 & Rotabloc Flywheel Technology
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
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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
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
Bwjdpfx Ajwx H Hzelxsn
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
Seller
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Registered since: 2025
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