[aussiesteve]

G'day,
I have a technical question about English Electric 12 CSVT Mk 2 and Mk 3 units.
My only footplate exposure to EEs was during my three year exile in Tasmania.
These units, dubbed the Z and ZA class regularly surged in traction motor amps when under full load.
I was told that this was normal.
I am wondering if this surging was due to the load regulator associated with the governor.
These units were air throttle and with Davies Metcalfe M9A brake system.
Yes, these units were built in Australia, but I am attempting to obtain a comparison with UK built units.
Alco and EMD motive power that I was familiar with here in NSW would only surge in motor amps due to wheel-slip etc.
I did enjoy the Tassie EEs once becoming familiar with their idiosyncrasies.
Though, the metal head control jumper cable was a bit of a pain.
Much the same as the trio of control jumper cables necessary on our NSWR 46 class Metro Vickers units.
Hopefully, somebody can enlighten me as to the reason for the traction motor amp surging.
Thanks,
Steve.