Arrangement of single phase transformers
A configuration for replacing a multi-phase transformer includes a plurality of single phase transformers each having a housing which is filled with an insulating fluid and in which a core with a high-voltage winding and a low-voltage winding is disposed. The configuration can be set up flexibly and also connected easily and conveniently to a supply network or consumer network by providing each housing with at least one cable connection and connecting each cable connection through a cable line to an outdoor connection which is air insulated, constructed for outdoor use and set up separately from the housing.
1. A configuration for replacing a multi-phase transformer, the configuration comprising:
a plurality of single phase transformers each having a respective housing being filled with an insulating fluid;
a plurality of outdoor connections each being set up separately from a respective one of said housings;
each of said housings having a respective core with a respective high-voltage winding and a respective low-voltage winding disposed therein;
each of said housings having at least one cable connection;
cable lines each connecting a respective one of said cable connections to a respective one of said outdoor connections, each of said cable lines having a respective cable end; and
each of said outdoor connections including:
an underframe for placing said outdoor connection on the ground, said underframe including a dead plate;
a busbar for connection to a phase of a consumer network or supply network, said busbar being connected to said cable ends;
at least one support supporting said busbar in an insulated manner on said underframe;
an overvoltage arrester connected between said busbar and said underframe;
said supports and said overvoltage arrester being connected to said dead plate.
2. The configuration according to claim 1 , wherein said cable lines each have at least one cable conductor, and each cable conductor has a length of between 5 and 50 meters.
3. The configuration according to claim 1 , wherein each respective one of said housings is equipped with two cable connections, and said cable lines each include two cable conductors.
4. The configuration according to claim 3 , wherein each of said outdoor connections has two cable inputs.
5. The configuration according to claim 1 , wherein each of said housings includes:
a selection device disposed in said housing, said selection device having a plurality of voltage connections each being connected to said high-voltage winding or said low-voltage winding;
a switching unit for selectively interconnecting two of said voltage connections; and
at least one closable adjustment opening formed in said housing and providing access to said selection device.
6. The configuration according to claim 5 , which further comprises:
lead through plug-in bushings;
said at least one closable adjustment opening including an input adjustment opening and an output adjustment opening;
said selection device being one of two said selection devices;
one of said selection devices facing said input adjustment opening and being connected to said high-voltage winding and to at least two of said lead through plug-in bushings; and
the other of said selection devices facing said output adjustment opening and being connected to said low-voltage winding, to at least one of said lead through plug-in bushings or to said at least one cable connection.
7. The configuration according to claim 1 , which further comprises:
a cooling module to be set up separately,
a separately set-up expansion vessel,
plug-in high-voltage lead throughs, and
an auxiliary power module,
each being detachably connected to a respective one of said housings.
8. The configuration according to claim 1 , wherein said cable connections are plug-in connections for said cable lines.
9. The configuration according to claim 1 , wherein said underframe is a A-frame and cable holders connect said cable ends to said A-frame.
10. The configuration according to claim 1 , wherein said supports, said cable ends and said overvoltage arrester are substantially mutually parallel and substantially perpendicular to said busbar and to said dead plate.