Hi Trev, I don't know anything about the MSW 1500V locos. All I could find was a link.....
http://www.27000electra.co.uk/tec.html
I couldn't see any reference there to them having Dynamic braking, so I can't say either way ?
One thing's for sure though - These modern units (37x/46x) are using AC motors, so they've got some fiendishly complex control systems, which are only possible with microprocessor electronics.
It's possible that the Electra locomotives could have had their DC motors configured to work as a retardation system - do you know anything more about this ?
Cheers,
Foggy
PS - Looking at the photos on the above site scared the living daylights out of me, as I see that it's possible to raise the Pantograph on one of these locos without there being a catenary system above. If you try this on some modern traction units you will seriously damage the gear as it will over-extend, and then the Automatic Dropping Device will bring it crashing back down in a heap of tangled metal.
