ELECTRICAL SYSTEM PRESENTATION MENU The A320 electrical system

The A320 electrical system looks very much like electrical systems which you are familiar

There are two engine driven generators. MENU

The generators maintain a constant speed by a drive mechanism known as an Integrated

Each generator supplies Alternating Current (AC) to its own bus: Generator 1 to

Each AC bus supplies its own Transformer Rectifier (TR): AC bus 1 to TR

DC bus 1 then, feeds the DC BAT bus (DC BAT). The DC

DC BAT The electrical system also includes two essential buses. The first one

This is the basic electrical system. We will now introduce some other

The electrical network can also be supplied by the APU generator. DC BAT MENU

These three generators are all identical and any one of them can supply the

DC BAT On the ground, the aircraft can be supplied by an external power

As a backup, there is a hydraulically driven EMERgency electrical GENerator (EMER GEN). MENU

The hydraulic power to drive the EMER GEN is provided by a Ram Air

DC BAT The electrical system is also fitted with an ESSential Transformer Rectifier (ESS

Now, let's see how this information is presented to the pilots in the

You can see that all the components we have talked about are displayed on

GEN 1 and GEN 2 supplying AC bus 1 and AC bus 2. MENU

TR 1 and TR 2 supplying DC bus 1 and DC bus 2. MENU

Two essential busses supplied by the left side. MENU

For simplification the component indications have been removed, let’s now present them. MENU

As shown, each component can be monitored via its indications. MENU

You can also notice the different connections displayed via green lines. Let’s

The ELEC panel is located on the overhead panel . MENU

For emergency cases, there is an EMER ELEC PWR panel on the left side

The battery voltage can be monitored either on the overhead panel or the ECAM

Each battery is controlled by a pb sw. MENU

Both main generators and the APU generator are controlled by their associated pb sw.

The external power is also controlled by a pb sw. We will learn

The AC ESS FEED pb sw enables the pilots to change the feed for

The BUS TIE pb sw enables the pilots to isolate one side of the

In case of failure, these pb sw enable you to disconnect an IDG from

MENU The controls and indications on the EMER ELEC PWR panel will be covered

In this module, you have seen the electrical configuration on ground, with both engines

LIST OF SUBJECTS MENU EXIT GLOSSARY AUDIO FCOM RETURN SYSTEM INTRODUCTION ECAM ELEC

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>ELECTRICAL SYSTEM PRESENTATION MENU ELECTRICAL SYSTEM PRESENTATION MENU

>The A320 electrical system looks very much like electrical systems which you are familiar The A320 electrical system looks very much like electrical systems which you are familiar with. It is simply more automatic and easier to use. MENU

>There are two engine driven generators. MENU There are two engine driven generators. MENU

>The generators maintain a constant speed by a drive mechanism known as an Integrated The generators maintain a constant speed by a drive mechanism known as an Integrated Drive Generator (IDG). IDG 1 IDG 2 MENU

>Each generator supplies Alternating Current (AC) to its own bus: Generator 1 to Each generator supplies Alternating Current (AC) to its own bus: Generator 1 to AC bus 1, Generator 2 to AC bus 2. MENU

>Each AC bus supplies its own Transformer Rectifier (TR): AC bus 1 to TR Each AC bus supplies its own Transformer Rectifier (TR): AC bus 1 to TR 1, AC bus 2 to TR 2. The TR convert alternating current into direct current (DC) to supply their associated DC buses, DC 1 and DC 2. MENU

>DC bus 1 then, feeds the DC BAT bus (DC BAT). The DC DC bus 1 then, feeds the DC BAT bus (DC BAT). The DC battery bus can charge the batteries or receive power from the batteries, as required. This will be explained further in Normal operation. MENU

>DC BAT The electrical system also includes two essential buses. The first one DC BAT The electrical system also includes two essential buses. The first one is the AC ESS bus fed by AC bus 1 and the second one is the DC ESS bus fed by DC bus 1. MENU

>This is the basic electrical system. We will now introduce some other This is the basic electrical system. We will now introduce some other components which supply the basic system. DC BAT MENU

>The electrical network can also be supplied by the APU generator. DC BAT MENU The electrical network can also be supplied by the APU generator. DC BAT MENU

>These three generators are all identical and any one of them can supply the These three generators are all identical and any one of them can supply the entire aircraft electrical needs. DC BAT MENU

>DC BAT On the ground, the aircraft can be supplied by an external power DC BAT On the ground, the aircraft can be supplied by an external power source. MENU

>As a backup, there is a hydraulically driven EMERgency electrical GENerator (EMER GEN). MENU As a backup, there is a hydraulically driven EMERgency electrical GENerator (EMER GEN). MENU DC BAT

>The hydraulic power to drive the EMER GEN is provided by a Ram Air The hydraulic power to drive the EMER GEN is provided by a Ram Air Turbine (RAT) located in the belly fairing which extends in case of severe electrical or hydraulic failures. MENU DC BAT

>DC BAT The electrical system is also fitted with an ESSential Transformer Rectifier (ESS DC BAT The electrical system is also fitted with an ESSential Transformer Rectifier (ESS TR). We will see the EMER GEN and the ESS TR in detail in the Abnormal operation module. MENU

>Now, let's see how this information is presented to the pilots in the Now, let's see how this information is presented to the pilots in the cockpit. We will introduce the ECAM ELEC page. DC BAT MENU

>You can see that all the components we have talked about are displayed on You can see that all the components we have talked about are displayed on the ECAM page. Notice that each component has a title to aid identification. Let’s briefly review the basic system using the ECAM ELEC page. DC BAT MENU

>GEN 1 and GEN 2 supplying AC bus 1 and AC bus 2. MENU GEN 1 and GEN 2 supplying AC bus 1 and AC bus 2. MENU

>TR 1 and TR 2 supplying DC bus 1 and DC bus 2. MENU TR 1 and TR 2 supplying DC bus 1 and DC bus 2. MENU

>Two essential busses supplied by the left side. MENU Two essential busses supplied by the left side. MENU

>The DC BAT bus and two batteries. MENU The DC BAT bus and two batteries. MENU

>For simplification the component indications have been removed, let’s now present them. MENU For simplification the component indications have been removed, let’s now present them. MENU

>As shown, each component can be monitored via its indications. MENU As shown, each component can be monitored via its indications. MENU

>MENU MENU

>You can also notice the different connections displayed via green lines. Let’s You can also notice the different connections displayed via green lines. Let’s now locate the various controls available to the pilots and associate them with the components displayed on the ECAM. MENU

>The ELEC panel is located on the overhead panel . MENU The ELEC panel is located on the overhead panel . MENU

>For emergency cases, there is an EMER ELEC PWR panel on the left side For emergency cases, there is an EMER ELEC PWR panel on the left side of the overhead panel. Now let’s look at the relationship between the ELEC panel and the ECAM ELEC page. MENU

>The battery voltage can be monitored either on the overhead panel or the ECAM The battery voltage can be monitored either on the overhead panel or the ECAM page. MENU

>Each battery is controlled by a pb sw. MENU Each battery is controlled by a pb sw. MENU

>Both main generators and the APU generator are controlled by their associated pb sw. Both main generators and the APU generator are controlled by their associated pb sw. MENU

>The external power is also controlled by a pb sw. We will learn The external power is also controlled by a pb sw. We will learn how to use it in the Normal operation modules. MENU

>The AC ESS FEED pb sw enables the pilots to change the feed for The AC ESS FEED pb sw enables the pilots to change the feed for the AC ESS bus from AC bus 1 to AC bus 2. MENU

>The BUS TIE pb sw enables the pilots to isolate one side of the The BUS TIE pb sw enables the pilots to isolate one side of the system from the other. You will see and do this in the abnormal operation modules. MENU

>In case of failure, these pb sw enable you to disconnect an IDG from In case of failure, these pb sw enable you to disconnect an IDG from its drive shaft. MENU

>MENU The controls and indications on the EMER ELEC PWR panel will be covered MENU The controls and indications on the EMER ELEC PWR panel will be covered in the abnormal operation modules. There is one exception. The EMER GEN TEST sw is used by maintenance only to test the emergency generator.

>In this module, you have seen the electrical configuration on ground, with both engines In this module, you have seen the electrical configuration on ground, with both engines running and with APU generator and external power available. We will introduce you to the different possible configurations in the next modules. NEXT MENU Module completed

>LIST OF SUBJECTS MENU EXIT GLOSSARY AUDIO FCOM RETURN SYSTEM INTRODUCTION ECAM ELEC LIST OF SUBJECTS MENU EXIT GLOSSARY AUDIO FCOM RETURN SYSTEM INTRODUCTION ECAM ELEC PAGE EMER ELEC PWR PANEL PANEL LOCATIONS ELEC PANEL