Trolley pole

Until 1985, Melbourne's trams were built with a trolley pole to get power from overhead wires.
Single-truck trams had a single trolley pole in the center, that could be swung around for the direction of travel.
Bogie trams had a trolley pole at both ends.
With the exception of the 1924 X class that used a double-trolley pole from their introduction in June 1924 to September 1924.

Ballarat, Bendigo & Geelong trams all used trolley poles.
Ballarat & Bendigo Tramways still use trolley poles.

Bow collector

Were trialed on the 1924 X class between September 1924 & 1927 before they were converted to single trolley pole.
It was also trialed on 3 of the 1906 U class from 1931 to 1938 before being considered unsuccessful.

V-type / Z-type / single-arm panto / Faiveley / Ausbreck

Panto testing began on 2 May 1977 with W2 546.
Z1, Z2, Z3, A1 & B1 classes were converted to pantos between 1987 & 1997.
The operational W-types were also converted at some point.
Melbourne trams built after 1985 (A2, B2, C1, C2, D1, D2, E1 & E2 classes) were built with pantos.
The Melbourne tram network all use Z-type pantos with the exception of those in the heritage fleet.