Electrical Systems Flashcards
(8 cards)
What is the power output of the DC starter generators?
30V, 300A
Which contactor is automatically de-energised by the Generator Control Unit (GCU) to disconnect a failed starter generator from its respective general busbar?
The associated Generator Line Contactor (GLC)
What happens if the DC1 reset switch is selected and held?
No. 1 Generator Control Unit (GU) fault codes are displayed on the GCU
When will No. 2 DC starter generator start to operate as a generator?
No. 2 engine reaches 50% Ng
What happens if the aircraft AC generators are online and ground AC supplies are connected?
The aircraft supplies will take priority
What information do the AC current transformers supply to the Generator Control
Units (GCU)?
Over current, differential current and unbalanced current
How is the under-frequency protection implemented?
On the ground only - disabled via the Weight On Wheels (WOW) microswitch in flight
What is the function of the both generators online relay?
To control the load shedding of busbar 1A
