Incoming Line Configuration: Marine switchgear systems are powered by multiple diesel generators operating in parallel. Each incoming line must be equipped with voltage transformers for accurate voltage measurement on the supply side.
Due to the parallel operation of multiple diesel generators, synchronization of phase sequence and frequency is required.
The marine power system employs a High-Resistance Grounding (GPT) method, implemented via a grounding voltage transformer with a secondary-side grounding resistor.
Marine switchgear must comply with internal arc fault protection requirements. Fully insulated busbars and phase barriers are used to prevent phase-to-phase short circuits.
Given the high safety demands, marine switchgear features complex protection configurations. The instrument compartments are typically fully equipped, with extensive inter-panel wiring. Arc flash protection is standard, and many projects also require online contact temperature monitoring. All components must meet relevant marine standards and hold classification society certifications, particularly critical devices such as protection relays and meters.
Example: Medium voltage switchgear for an icebreaker project, certified by the Russian Maritime Register of Shipping (RS), with requirements including IP42 rating, marine-grade handrails, door limiters, etc.
