产品信息 - special-transformer-earthing-transformer-grounding-transformer-railway-traction-transformer-furnace-->power transformer

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China Transpowers Electric Co., Limited

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special-transformer-earthing-transformer-grounding-transformer-railway-traction-transformer-furnace-

产品分类 :

機械與設備->變壓器、整流器自動化設備->變壓器

special-transformer-earthing-transformer-grounding-transformer-railway-traction-transformer-furnace-

产品规格

Country	CN
Brand	CTSS
Materials	copper
Size	1
Weight	1
Color	gray
Packing	nude/wooden case
Minimum Order	1
Payment Term	T/T

产品描述

Rectifier transformers are combined with a diode or thyristor rectifier. The applications range from very large aluminum electrolysis to various small and medium size operations. The transformers may have a built-in or separate voltage regulation unit for direct output regulation of diode rectifiers, and correspondingly a power factor improvement with a thyristor rectifier.

CTSS is renowned and appreciated by its reliable products performance and integrated services.

Furnace transformers are separated with normal power transformer with its characteristic of massive secondary currents. As an example a 30 MVA unit at 150 V would result in a secondary current of 115 kilo Ampere. For these high secondary currents special bushings are required to connect to the bus-bars. These bushings are specified with very specific arrangements to suit the bus-bar arrangement and cooling system. Furnace bus-bars are mostly water cooled. The coolers are either of the Oil Forced Air Forced (OFAF) or Oil Forced Water Forced (OFWF).

Traction transformer is applied to railway as a power supply for electric power train. Its primary side is connected with two phases of the three-phase power grid; its secondary side connected with the traction busbar and the other side connected with railway track and grounded. The capacity efficiency is high but it causes large negative sequence current hence double circuit power supply is not available. As the unstable traction load, frequent short-circuit failure and large harmonic wave, the operation situation of traction transformer is much more server therefore strong overload withstand ability and short-circuit impulse withstand ability is required for traction transformer.

In some situation, the system neutral may not be available. To be able to ground these systems, earthing /grounding transformers can be used to create a neutral, which in turn can be connected to ground either directly, or more commonly, through a Neutral Grounding Resistor (NGR). These combinations are known as artificial neutrals.

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