E190 -Electrical

Question 1

What happens if you set the BAT 1 switch to OFF ?

Answer 1

The battery is isolated from the airplane electrical system and only supplies power to HBB 1.

Question 2

When are the batteries on the electrical synoptic page indicated white ?

Answer 2

When the voltage is < 18 V.

Question 3

The IDG’s and APU GEN are rated at:

Answer 3

115/200 V30/40 kVA400 Hz

Question 4

The RAT is rated at:

Answer 4

115/200 V15 kVA400 Hz

Question 5

The AC/DC inverter is rated at:

Answer 5

250 VA

Question 6

The static inverter powers:It converts:

Answer 6

The AC STBY BUS from the DC ESS BUS 1, when an electrical AC source is not available. (normally the AC ESS BUS through AC BUS 2).28 V DC to 115 V AC power.

Question 7

When does the RAT deploy ?

Answer 7

Whenever AC power is lost. After 8 sec, the AC ESS BUS (and other essential busses) are powered by the RAT.

Question 8

Can the RAT be stowed back in flight ?

Answer 8

No.

Question 9

It takes 8sec for the RAT to power the AC ESS BUS.In the mean time, the AC STBY bus and DC ESS BUSSES are powered by:

Answer 9

The batteries.

Question 10

Is ACMP 3B powered during an electrical emergency (RAT deployed) ?

Answer 10

No. Only ACMP 3A is powered by the RAT.

Question 11

Does the RAT power all essential busses at ANY airspeed ?

Answer 11

No.
< 130 kts, the RAT only powers the AC ESS BUS, other busses (DC ESS BUSSES, AC STBY BUS) are powered by the batteries.
At an even lower speed, load shedding occurs until AC ESS BUS is no longer powered.

Question 12

What is the “no break power transfer” ?

Answer 12

It allows momentarily paralleling of AC power sources to avoid short power interruptions.

Question 13

The two NiCd batteries are rated at:

Answer 13

22,8 V27 Ah

Question 14

If AC power is available, are the batteries constantly charged ?

Answer 14

Yes, including by the RAT !

Question 15

What is the minimum battery #2 temperature for an APU start ?

Answer 15

minus 20 deg celsius.

Question 16

In an electrical emergency, how long can the batteries supply power ?

Answer 16

For at least 10 min.

Question 17

When is the BATT 1(2) OVERTEMP msg displayed ?

Answer 17

If battery temperature is > 70 deg celsius for at least 2 sec.

Question 18

A DC GPU voltage should be between:

Answer 18

24 V - 29 V DC power.

Question 19

Which busses are included in the AICC ?

Answer 19

HOT BAT BUS 2APU START BUS

Question 20

Which busses are included in the EICC ?

Answer 20

DC ESS BUS 1DC ESS BUS 3HOT BAT BUS 1AC ESS BUSAC STBY BUSThe DC ESS BUS 2 is NOT included !

Question 21

Which busses are included in the RICC ?

Answer 21

AC BUS 2DC BUS 2

DC ESS BUS 2

Question 22

Which busses are included in the LICC ?

Answer 22

AC BUS 1AC GSBDC GSBDC BUS 1

Question 23

In which ICC can you find the DC ESS BUS 2 ?

Answer 23

In the RICC (integrated control center).

Question 24

Each ICC contains:

Answer 24

CB’sLRU’s and LRM’sAC or DC busses.

Question 25

What is an SPDA ?

Answer 25

An electrical load management unit that receives power from the respective busses (integrated in the ICC’s). They contain electronic CB’s.So: ICC - BUSSES - SPDA - airplane systems.

Question 26

How many SPDA’s exist and where are they located ?

Answer 26

There are two SPDA’s.SPDA 1 is located in the fwd electronics bay.SPDA 2 is located in the center electronics bay.

Question 27

SPDA 1 is DC-powered by:

Answer 27

DC ESS BUS 1DC ESS BUS 2DC GSBDC BUS 1

Question 28

SPDA 2 is DC-powered by:

Answer 28

DC ESS BUS 1DC ESS BUS 2DC GSBDC BUS 2

Question 29

All electronic CB’s are found in:

Answer 29

SPDA 1 or 2.

Question 30

Thermal CB’s are found in:

Answer 30

Cockpit or ICC’s.

Question 31

What is the electrical source priority ?

Answer 31

IDGAPUGPUOpposite IDG.

Question 32

When the electrical load increases, the SPDA can command load shedding, by turning off:

Answer 32

• galleys- right windshield heating

Question 33

Is it possible to reconnect the IDG after disconnection ?

Answer 33

No.