Technical info on EP20 pantographs (AX023BULT / AX024BMLT, Alstom)

[toniq]

Hi everyone.
I’m researching the dual-system electric locomotive EP20 and I’m trying to find technical information about its pantographs. According to available sources, EP20 uses two different current collectors:
• AX023BULT for DC operation
• AX024BMLT for AC operation

Both are reportedly supplied within an Alstom traction equipment package, but I can’t find any proper datasheets or manufacturer documentation in English.

I’m particularly interested in:
• contact force range
• max operating speed
• type of contact strips (carbon / composite)
• differences between AC and DC versions
• maintenance intervals or known operational issues

Has anyone here worked with EP20 locomotives or similar Alstom pantographs on high-speed or dual-system locos? Any technical insight, references, or pointers would be much appreciated.

Thanks in advance.

 

[Acathater]

Are you sure the pantographs came from Alstom?
The wiki entry for these Russian machines says

The first 36 units had much of the electrical equipment (some auxiliary units, circuit breakers, transformer, and electronic control for the traction system) supplied by Alstom from, and integrated into new standardized locomotive platform developed by Transmashholding, the remainder also will be supplied by TMH, and the locomotives assembled at TMH's Novocherkassk plant.[5] The initial batch of locomotives had pantographs from Faiveley, transformer and DC inductors from ABB, disc brakes from Knorr Bremse, and mechanical drive (gear, hollow shaft) from Henschel Antriebstechnik.[27]

note the highlighted section

EP20 - Wikipedia

en.wikipedia.org

== Doublepost prevention - post automatically merged: 21 Jan 2026 ==

There's also an interesting comment on

Transmashholding EP20 electric locomotives covered 100 million km

Transmashholding EP20 electric locomotives manufactured at NEVZ plant have reached a milestone of 100 million kilometres of combined covered distance.

www.railwaypro.com

NEVZ manufacturers EP20 locomotives since 2012, using domestic parts and components from 20 Russian regions. In the latter years, the manufacturer undergone substantial import substitution efforts for an array of critical components, which included traction and auxiliary converters, pneumatic current collecting gear, driver’s cabin, and sanitary modules.

I read that as the Faiveley pantographs are being replaced by Russian sourced ones.
Not surprising given the current political climate

== Doublepost prevention - post automatically merged: 21 Jan 2026 ==

Just a bit more....seems these locos are fitted with four pantographs - 2x AC and 2x DC, and if needed then can be used in the relevant pairs

Wikipedia has a photo of the arrangement at

File:Pantograph of the High-speed electric passenger locomotive EP20 (ЭП20) of the Russian Railways.jpg - Wikimedia Commons

commons.wikimedia.org

 

[toniq]

Are you sure the pantographs came from Alstom?
The wiki entry for these Russian machines says


note the highlighted section

EP20 - Wikipedia

en.wikipedia.org

== Doublepost prevention - post automatically merged: 21 Jan 2026 ==

There's also an interesting comment on

Transmashholding EP20 electric locomotives covered 100 million km

Transmashholding EP20 electric locomotives manufactured at NEVZ plant have reached a milestone of 100 million kilometres of combined covered distance.

www.railwaypro.com

I read that as the Faiveley pantographs are being replaced by Russian sourced ones.
Not surprising given the current political climate

== Doublepost prevention - post automatically merged: 21 Jan 2026 ==

Just a bit more....seems these locos are fitted with four pantographs - 2x AC and 2x DC, and if needed then can be used in the relevant pairs

Wikipedia has a photo of the arrangement at

File:Pantograph of the High-speed electric passenger locomotive EP20 (ЭП20) of the Russian Railways.jpg - Wikimedia Commons

commons.wikimedia.org

I study in Russian University of Rail Way. My professor told me, this is machine from France maybe, because we don’t have any information of this train. And I want to know, where this pantograph from. Sorry, my English not good

 

[toniq]

Are you sure the pantographs came from Alstom?
The wiki entry for these Russian machines says


note the highlighted section

EP20 - Wikipedia

en.wikipedia.org

== Doublepost prevention - post automatically merged: 21 Jan 2026 ==

There's also an interesting comment on

Transmashholding EP20 electric locomotives covered 100 million km

Transmashholding EP20 electric locomotives manufactured at NEVZ plant have reached a milestone of 100 million kilometres of combined covered distance.

www.railwaypro.com

I read that as the Faiveley pantographs are being replaced by Russian sourced ones.
Not surprising given the current political climate

== Doublepost prevention - post automatically merged: 21 Jan 2026 ==

Just a bit more....seems these locos are fitted with four pantographs - 2x AC and 2x DC, and if needed then can be used in the relevant pairs

Wikipedia has a photo of the arrangement at

File:Pantograph of the High-speed electric passenger locomotive EP20 (ЭП20) of the Russian Railways.jpg - Wikimedia Commons

commons.wikimedia.org

And I need information about this pantograph. Because I have project with this

== Doublepost prevention - post automatically merged: 21 Jan 2026 ==

Are you sure the pantographs came from Alstom?
The wiki entry for these Russian machines says


note the highlighted section

EP20 - Wikipedia

en.wikipedia.org

== Doublepost prevention - post automatically merged: 21 Jan 2026 ==

There's also an interesting comment on

Transmashholding EP20 electric locomotives covered 100 million km

Transmashholding EP20 electric locomotives manufactured at NEVZ plant have reached a milestone of 100 million kilometres of combined covered distance.

www.railwaypro.com

I read that as the Faiveley pantographs are being replaced by Russian sourced ones.
Not surprising given the current political climate

== Doublepost prevention - post automatically merged: 21 Jan 2026 ==

Just a bit more....seems these locos are fitted with four pantographs - 2x AC and 2x DC, and if needed then can be used in the relevant pairs

Wikipedia has a photo of the arrangement at

File:Pantograph of the High-speed electric passenger locomotive EP20 (ЭП20) of the Russian Railways.jpg - Wikimedia Commons

commons.wikimedia.org

I saw this information in Russian forums. What do u think about this? https://scbist.com/xx2/44234-06-2014-apparaty-vysokovoltnoi-cepi-elektrovoza-ep20.html

 

[Gag Halfrunt]

A quick Google search suggests that both the AX023BULT and the AX024BMLT are unique to the EP20. All the pages mentioning them are in Russian.

 

[Acathater]

What's the actual project - are you trying to reverse-engineer them?

== Doublepost prevention - post automatically merged: 22 Jan 2026 ==

This page shows that the manufacturer was Faiveley

Руководство по эксплуатации токоприемников AX023BULT AX023BMLT

Руководство по эксплуатации токоприемников AX023BULT AX023BMLT Файл Руководство по эксплуатации токоприемников AX023BULT AX023BMLT.pdf

eva.tools

however the link to the manual pdf is now dead - presumably deleted

However these two pages appear to have some tech details including diagrams

2ЭС10.00.000.000 РЭ2 Электровоз грузовой постоянного тока 2ЭС10 Руководство по эксплуатации Часть 3.

2ЭС10.00.000.000 РЭ2, Электровоз грузовой постоянного тока 2ЭС10 с асинхронными тяговыми электродвигателями, Руководство по эксплуатации, Часть 3, Описание и работа. Электрические аппараты.

rcit.su

[06-2014] Аппараты высоковольтной цепи электровоза ЭП20 - СЦБИСТ - сайт железнодорожников №1

Аппараты высоковольтной цепи электровоза ЭП20 На двухсистемном электровозе ЭП20 токосъем (рис. 1) осуществляется парой токоприемников: ХА1, ХАЗ при дви

scbist.com

(note I'm not going to try posting a summary of these - they're all in Russian (which I can't speak) so I'd have no idea what to select)

 

[toniq]

What's the actual project - are you trying to reverse-engineer them?

== Doublepost prevention - post automatically merged: 22 Jan 2026 ==

This page shows that the manufacturer was Faiveley

Руководство по эксплуатации токоприемников AX023BULT AX023BMLT

Руководство по эксплуатации токоприемников AX023BULT AX023BMLT Файл Руководство по эксплуатации токоприемников AX023BULT AX023BMLT.pdf

eva.tools

however the link to the manual pdf is now dead - presumably deleted

However these two pages appear to have some tech details including diagrams

2ЭС10.00.000.000 РЭ2 Электровоз грузовой постоянного тока 2ЭС10 Руководство по эксплуатации Часть 3.

2ЭС10.00.000.000 РЭ2, Электровоз грузовой постоянного тока 2ЭС10 с асинхронными тяговыми электродвигателями, Руководство по эксплуатации, Часть 3, Описание и работа. Электрические аппараты.

rcit.su

[06-2014] Аппараты высоковольтной цепи электровоза ЭП20 - СЦБИСТ - сайт железнодорожников №1

Аппараты высоковольтной цепи электровоза ЭП20 На двухсистемном электровозе ЭП20 токосъем (рис. 1) осуществляется парой токоприемников: ХА1, ХАЗ при дви

scbist.com

(note I'm not going to try posting a summary of these - they're all in Russian (which I can't speak) so I'd have no idea what to select)

Bro, this is information so cool for my project. Thanks my brother

== Doublepost prevention - post automatically merged: 22 Jan 2026 ==

What's the actual project - are you trying to reverse-engineer them?

== Doublepost prevention - post automatically merged: 22 Jan 2026 ==

This page shows that the manufacturer was Faiveley

Руководство по эксплуатации токоприемников AX023BULT AX023BMLT

Руководство по эксплуатации токоприемников AX023BULT AX023BMLT Файл Руководство по эксплуатации токоприемников AX023BULT AX023BMLT.pdf

eva.tools

however the link to the manual pdf is now dead - presumably deleted

However these two pages appear to have some tech details including diagrams

2ЭС10.00.000.000 РЭ2 Электровоз грузовой постоянного тока 2ЭС10 Руководство по эксплуатации Часть 3.

2ЭС10.00.000.000 РЭ2, Электровоз грузовой постоянного тока 2ЭС10 с асинхронными тяговыми электродвигателями, Руководство по эксплуатации, Часть 3, Описание и работа. Электрические аппараты.

rcit.su

[06-2014] Аппараты высоковольтной цепи электровоза ЭП20 - СЦБИСТ - сайт железнодорожников №1

Аппараты высоковольтной цепи электровоза ЭП20 На двухсистемном электровозе ЭП20 токосъем (рис. 1) осуществляется парой токоприемников: ХА1, ХАЗ при дви

scbist.com

(note I'm not going to try posting a summary of these - they're all in Russian (which I can't speak) so I'd have no idea what to select)

my them of project - Development of a technology for repairing the current receiver of the electric locomotive EP20

 

[Acathater]

Bro, this is information so cool for my project. Thanks my brother

== Doublepost prevention - post automatically merged: 22 Jan 2026 ==


my them of project - Development of a technology for repairing the current receiver of the electric locomotive EP20

So you're trying to reverse engineer parts you're no longer able to purchase