Mass Transit Insulators
 
Insulators of the Public Transport of Budapest. Tram and trolley bus's roof Insulators, and supply and up wire holder Insulators
Upwire strain Insulator, a nut and a suspension
It is a direct upwrie holder Insulator for tolley buses, trams and suburban railways.
A porcelain block. It holdes the subway's (metro) 3rd rail, the electric supply rail.
They are railway upwire hardware's holder Insulators. The hardwares are on voltage, some aluminium-steel rods, boards etc. All of them must hold these Insulators. The fat one made for the railway only, for 25 kV. The smaller one is universal, but the railway use them, two ones need is serial.
Railwas upwire supply wires need this like Insulators also. The Deltas are on the old railways, the newer ones have this post Insulators. The new railway electrify use epoxy plsatic or composite Insulators :-(
These Insulators in service, on the Public Transport of Budapest's upwire network:


Suburban railway's upwires:


Spools in use on the suburban railway's upwires:


Nuts. They are very common..


The small suspensions holding the upwire, that like Insulator is on the 2nd picture:


The most common nuts on the tams's upwires:


Small suspensions. They are old and began be rare:


Old tram, with Insulatons on it's roof: