AGK - Electrics 2

• Distribution point for electrical power
• ***** of metal or heavy duty cable depending on type of load
• On AC busbar, connection in parallel, isolation of individual equip DECREASES its consumption.

Hot/Direct Bus

Directly connected to battery

Vital aspects like emergency floor lighting

Wires

Single solid rod or filament of drawn metal enclosed in suitable insulating material & protective covering

Cables

Group of single solid wires stranded together for flexibility + protective covering

Fuses

• Not resettable - must be replaced
• Rating expressed in Amperes

Circuit Breakers

• Can be reset manually after fault rectified
• Thermal circuit breakers protect from overheating/overload
• Can be used in both AC and DC circuits
• Trip free circuit breakers will not allow contacts to be held closed while current fault still exists.
  

• Measured in Farads
• Stores electricity
• Acts like short term battery in a DC circuit
  
• Capacitor in parallel with breaker points induces very high voltage across secondary windings
• When the supply freq in circuit with capacitor increased, current in this circuit will increase.
  

Series:

• 1/Ctotal = 1/C1 + 1/C2 + 1/C3 + ...

Parallel:

• Ctotal = C1 + C2 + C3 +...

Capacitive Load: Current Leads Voltage

Inductive Load: Current Lags Voltage

Magneto

Transforms AC voltage to higher or lower value

In transformer, power input = power output.

Voltage across each coil propertional to number of turns.

Inverter: DC to AC

Switches: control operating sequences of circuits

Relay switch: Electromagnetically operated switch