A little question about the function of the three "Rectifiers"...

[Skulleader]

Hello,

 

Once again I need your help for understand the function of the three "Rectifiers", I know the function of the "inverters" but here I'm lost...

 

In first I switch "ON" the two battery, after I switch "ON" the two "Receiver", after I switch "ON" the two "Generators" and for finish I switch "ON" the three "Rectifiers".

 

But if I can understand the functions of all these devices but I don't know the function of the "Rectifiers".

 

Please anybody can help me to uderstand during my check-list the utilisation of these three "Rectifiers" ?

 

Once again I would like to thank you for your assistance. Best regards, Skull.

[159th_Falcon]

Rectifiers change AC (alternating current) to DC (Direct Current)

 

This is needed to power systems working on DC, and to charge the batteries.

 

What systems in the Mi-8 work on AC and which work on DC i do not know.

But i'm sure that someone will come along to tell us.

 

(inverters do the opposite, change DC from for example a battery, to AC)

[Skulleader]

Hello Falcon,

 

I would like to thank you for your explanations, if I've well understand:

 

 

The two battery give us the DC and the Inverter convert to AC for the system.

The two engines run.

The two generators ON.

The three rectifiers convert the AC to DC for the other devices

 

Ok, all this devices function by two device:

Two battery.

Two engines.

Two generators.

But why three rectifiers and not two rectifiers ?

 

I know that my question is crazy but if I've well understand how work the A-10C and KA-50 with the Mi-8 I've some problems with its devices.

 

A great thanks in advance for all and best regards. Skull

[fjacobsen]

Rectifier 1 is supllied by Generator 1.

Rectifier 2+3 is supllied by Generator 2.

All 3 rectifiers are connected in parallel to a common bus.

No. 3 rectifier is a backup for no. 2 rectifier.

If Generator 2 fails, rectifier no. 3 switches automatically to no. 1 Generator.

 

So no. 3 rectifeier is simply a backup if one of the generators, no. 1 or no. 2 rectifier fails.

[Flagrum]

Rectifier 1 is supllied by Generator 1.

Rectifier 2+3 is supllied by Generator 2.

All 3 rectifiers are connected in parallel to a common bus.

No. 3 rectifier is a backup for no. 2 rectifier.

If Generator 2 fails, rectifier no. 3 switches automatically to no. 1 Generator.

 

So no. 3 rectifeier is simply a backup if one of the generators, no. 1 or no. 2 rectifier fails.

That means that under normal operations only two rectifiers are active?

[159th_Falcon]

possibly. But its more likely that there all active and "share the load"

 

Meaning that if the total power consumption of the AC system is 99 watts then;

Inverter 1 inverts 33 watts

Inverter 2 inverts 33 watts

Inverter 3 inverts 33 watts

 

If one fails, the other two automaticly start supplying the required power.

 

At least, that what i think happens. No real life Mi-8 experience so could be wrong.

[fjacobsen]

That means that under normal operations only two rectifiers are active?

 

No

 

Normally all 3 are active.

 

AC power from generator 1 is rectified through rectifier 1 to the common DC bus

AC power from generator 2 is rectified through recifier 2+3 to the common DC bus.

 

Should rectifier 2 fail, then rectifier 3 will continue to function

Should generator 2 fail then will rectifier 2 no longer supply power to the common bus and rectifier 3 will switch to be supllied by generator 1 and this way ensure that power will be suplied to the common DC bus if rectifier 1 should fail and so on.

 

So rectifier 1 and 2 are supplied and dependent on their respective generator, wjil rectifier 3 will switch between generators should one fail, but in normal operation when both generators are healthy be supllied by geberator 2.

[Skulleader]

Hello ;)

 

In first I would like to thank you for your explanations but there's one thing with the Rectifiers that I do not understand.

 

You wrote:

Rectifier 1 is supllied by Generator 1.

Rectifier 2+3 is supllied by Generator 2.

After many test I give you my feedback that I've discovered between the generator and Rectifier:

 

The setup of my ramp start:

Battery 1 & 2 : ON

Inverter 1 & 2: AUTO

APU: RUN

Two Engines: RUN

 

When I switch ON the Generator 1, I can see the two lights of the Rectifier 1 & 2

When I switch ON the Generator 2, I can see the two lights of the Rectifier 2 & 3

 

As it's not easy to explain so I join you two screenshots who you can see my Generator & Rectifier switches and the light of the Rectifiers.

 

For summary:

 

Is it normal that the light of Rectifiers 1 & 2 are lighting when I switch ON my Generator 1 ?

 

Is it normal that the light of Rectifiers 2 & 3 are lighting when I switch ON my Generator 2 ?

 

Please can you tell me if I meet a bug or if I've do not understand one thing ?

 

 

The two screenshots of my explanation:

 

 

AND

 

 

 

I hope that my explanations are clear because it's not easy to explain my feedback...

 

A great thanks in advance for all, best regards. Skull :thumbup:

Edited September 29, 2013 by Skulleader

[AlphaOneSix]

Is it normal that the light of Rectifiers 1 & 2 are lighting when I switch ON my Generator 1 ?

 

Is it normal that the light of Rectifiers 2 & 3 are lighting when I switch ON my Generator 2 ?

 

Please can you tell me if I meet a bug or if I've do not understand one thing ?

 

1) Normal, yes.

 

2) Normal, yes.

 

3) No bug.

 

The #3 rectifier can be powered by either generator #1 or generator #2. It's the only one that can switch between the two generators.

 

The #1 rectifier can only be powered by the #1 generator. The #2 rectifier can only be powered by the #2 generator.

 

Since the #1 rectifier cannot be powered by the #2 generator, the "TURN ON RECTIFIER" light for the #1 rectifier stays off when the #2 generator is turned on. The opposite is true for the #2 rectifier. The light for the #3 rectifer comes on in both cases because it can be powered by either generator.

[fjacobsen]

Understand the lights like this....

 

When generator 1 is On and generator 2 is Off, the no. 1 rectifier is powered and the light for it tells that it is powered and can be switched On.

Since generator 2 is Off, the no. 3 rectifier will switch to generator 1 and the light tells that rectifier no. 3 is powered and can be turned On.

 

Now switching generator 1 Off and generator 2 On will power no.2 rectifier and the the light for it will tell that it is powered and can be turned on. The no. 3 rectifier will now switch to generator 2 and tell that it is powered and can be turned on.

 

Turning both generators On will then resume normal operation where no. 1 rectifier will be powered by number 1 generator and if the rectifier is Off the light will tell that it is powered (by no. 1 generator) and can be turned On.

If no. 2 rectifier is Off the light for it will tell that it is powered (by no. 2 generator) and can be turned On. In this situation the no. 3 rectifier will be powered by the no. 2 generator (normal operation) and if it is Off the light for it will tell that it can be turned On.

Edited September 29, 2013 by fjacobsen

[Skulleader]

Hello dear AlphaOne and Fjacobsen,

 

I appreciate your quickly answer and explanation, now everything is OK now..

 

I have one other question but as I know that this awesome Mi-8 is Open Beta I think that few elements don't work the moment (it's not a problem of course)...

 

Here my new question: For the moment these gauges are not functionnal ?

 

I join you again one screenshot of these gauges:

 

 

 

Once again a great thanks for your help and explanations, Skull.

[xxJohnxx]

The two at the top right (battery load) seem to work.

 

However, as soon as the generators are running, you won't draw any load from the batteries, thus they show 0.

If you want to see those instruments moving, just look at them while you start your APU, the needles will spike quit a bit.

 

PS: The english cockpit mod looks realy nice I must say.

[fjacobsen]

Not quite sure on it, but it seems they have not been simulated yet.

 

The BATT load should only indicate a value if the Batteries are turned on and the generators as well as groundpower and APU are turned off. Or it will indicate when the batteries are charged.

 

With the generators operating both the generator and rectifier amp meters should indicate something, since the generators will take all the load and the rectifiers will take the DC load (rectifiers will be supplied by the generators).

[Skulleader]

If you want to see those instruments moving, just look at them while you start your APU, the needles will spike quit a bit.

 

When I start my APU I can see the two instrument (Batt Load 1 & 2) moving few second and return to the zero.

 

Thanks for these explanations, Bye. Skull