Main Switchboard (LV)
medium
Low-voltage main switchboards (380-690V) for vessel electrical distribution
Known Models (4)
ABB MNS
Up to 690V, 6300A
· Electrical Power Distribution
· LV Main Switchboard
voltage: 380-690V
type: LV Main Switchboard
Common Failures:
- • ACB trip mechanism failure
- • Busbar connection loosening from vibration
- • Insulation breakdown
- • Metering CT failure
Service: Torque-check busbar connections annually. ACB maintenance per ABB schedule. Clean with dry air. IR scan for hot spots.
Spares: Ersatzteile über ABB oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Hyundai Electric HiMSEN Marine Switchboard
Up to 690V, 5000A
· Electrical Power Distribution
· LV Main Switchboard
voltage: 440-690V
type: LV Main Switchboard
Common Failures:
- • PMS communication error
- • Generator breaker sync failure
- • Busbar overheating
Service: Integrated with HiMSEN engine control. Korean-built fleet standard. Annual insulation test and busbar check.
Spares: Ersatzteile über Hyundai Electric oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Schneider Electric Prisma SeT
Up to 690V, 4000A
· Electrical Power Distribution
· LV Main Switchboard
voltage: 380-690V
type: LV Main Switchboard
Common Failures:
- • MCCB trip coil failure
- • Busbar support insulator cracking
- • Earth fault relay nuisance tripping
Service: Form 4 separation standard for marine. Clean and inspect annually. Replace MCCB at end of electrical life.
Spares: Ersatzteile über Schneider Electric oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Siemens SIVACON S8
Up to 690V, 6300A
· Electrical Power Distribution
· LV Main Switchboard
voltage: 380-690V
type: LV Main Switchboard
Common Failures:
- • Withdrawable unit interlock failure
- • Busbar insulation aging
- • Relay malfunction
- • Ventilation fan failure
Service: Type-tested assembly. Withdrawable units for safe maintenance. Annual thermographic survey recommended.
Spares: Ersatzteile über Siemens oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.