Circuit breaker (ACB / MCCB)
Switch that opens automatically on overload or short circuit; generator breakers also trip on reverse power.
In 9 languages
| Language | Term |
|---|---|
| English | Circuit breaker (ACB / MCCB) |
| Russian | Автоматический выключатель |
| Romanian | Întrerupător automat |
| Polish | Wyłącznik samoczynny |
| Latvian | Automātslēdzis |
| Filipino | Circuit breaker (ACB) |
| Indonesian | Pemutus sirkuit (ACB / MCCB) |
| Chinese | 断路器（空气断路器） |
| Croatian | Prekidač (zračni prekidač) |
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Related terms
Earth fault (ground fault)Contact between a live conductor and the hull; on insulated systems the earth lamps or monitor show it and the circuit is found by isolating feeders one by one.Synchronising and load sharingMatching voltage, frequency and phase of an incoming generator before closing its breaker, then sharing the load between running sets.Preferential tripOn generator overload, non-essential consumers such as galley and air conditioning are switched off in stages to avoid a blackout.Alarm and monitoring system (AMS)Collects signals from sensors across the engine room, shows values and raises alarms; it allows an unmanned engine room at night.Pressure transmitter (4–20 mA)Turns pressure into a 4–20 mA signal for the alarm system; zero and span are checked against a test gauge.Temperature sensor (Pt100, thermocouple)Pt100 resistance sensors are used for water and oil; thermocouples for exhaust gas, where temperatures are higher.Batteries (emergency and starting)Supply emergency lighting, radio and alarms during a blackout; electrolyte level, voltage and charger are checked weekly.Main switchboard (MSB)Switchboard where the main generators are connected and paralleled and from which power goes to all consumers.