Currency KZT
OLZ-1,25/27,5 transformer buy in Almaty
Buy OLZ-1,25/27,5 transformer
OLZ-1,25/27,5 transformer
transformator_maslyanyj_tmg_10010_u1
transformator_maslyanyj_tmg_10010_u1
transformator_maslyanyj_tmg_10010_u1
transformator_maslyanyj_tmg_10010_u1
transformator_maslyanyj_tmg_10010_u1

OLZ-1,25/27,5 transformer

Code: ТМГ100
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In stock
Price from:
500000 KZT
Wholesale:
  • 400000 KZT/pcs  - from 2 pcs
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Seller
Kazakhstan, Almaty
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Technical characteristics
  • BrandАО МЭТЗ, Алагиум, Китай
  • Country of manufactureKazakhstan
  • ColorGrey
  • Number of phases3
  • Number of coils2
  • Method of cooling the windingsOil
  • Type of constructionRod type
Description
OLZ - 1,25/27,5 transformer

The transformer is intended for food of chains of automatic lock - out from VL of longitudinal power supply of the railroads. The transformer can be used to food of chains of low - power consumers of other branches.

The transformer is manufactured in a climatic modification of "UHL" and "T" of category of placement 1 in accordance with GOST 15150. Values of air temperature at operation - from minus 60 °C to plus 40 °C for execution of "UHL1" and from minus

10 °C to plus 55 °C for execution of "T1".

The transformer has no own protection against the resonant phenomena and switching retension in a network.

Working situation - vertical.

Technical characteristics of the OLZ - 1,25/27,5 transformer

Parameter Value 
Class of tension, kV 27
The largest working tension, kV 30
The rated voltage of primary winding, In 27500
The rated voltage of a secondary winding, In, on taps:
X - a1 
X - a2 
X - a3 
X - a4 
X - a5

218 
224 
230 
236 
242
Rated power, In · And 1250
Nominal frequency, Hz 50
Current of idling, % , no more 35
Losses of idling, W, no more 50
Tension of short circuit, % 4,5±0,45
Scheme and group of connection of windings 1/1 - 0
Type of isolation cast
Test tension, kV:
one - minute industrial frequency 
composite storm pulse 
the storm impulse which is cut off

70 
170 
200
Weight, kg 90 max

General view of the power OLZ - 1,25/27,5 transformer


Schematic electric circuit of the power OLZ - 1,25/27,5 transformer


Terminal box of the power OLZ - 1,25/27,5 transformer

Coolers

The cooling equipment takes away hot oil in the top part of a tank and returns the cooled oil in the lower lateral part. The refrigerating unit has an appearance of two oil contours with indirect interaction, one internal and one external contour. The internal contour transfers energy from the heating surfaces to oil. In an external contour oil transfers heat to the secondary cooling environment. Transformers are usually cooled with atmospheric air.

Types of coolers:

  1. Radiators, happen different types. Generally they represent a set of flat channels in plates with a face welded seam which connect the top and lower collectors.
  2. The corrugated tank is at the same time both a tank and the cooling surface for distributive transformers of low and average power. Such tank has a cover, corrugated walls of a tank and the lower box.
  3. Fans. For big knots use of suspended fans under radiators or sideways from them for ensuring the compulsory movement of air and natural oil and compulsory air (ONAF) cooling is possible. It can increase load ability of transformers approximately by 25% .
  4. Heat exchangers with compulsory circulation of oil, air. In big transformers assignment of heat by means of natural circulation through radiators demands a lot of place. The need for space for compact coolers is much lower, than for simple radiator batteries. From the point of view of economy of the place it can be favorable to use compact coolers with a considerable aerodynamic resistance that demands application of compulsory circulation of oil by means of the pump and powerful fans for air forcing.
  5. Oil - water coolers, as a rule, represent cylindrical tubular heat exchangers with removable tubes. Such heat exchangers are very widespread and represent classical technology. They have various application in the industry. More modern designs, for example, flat heat exchangers of membrane type, did not enter practice yet.
  6. Oil pumps. Circulation pulsers for the oil cooling equipment are special compact, completely tight designs. The engine is shipped in transformer oil - omental boxes are absent.

Equipment for regulation of tension

Main article: Regulation of tension of the transformer

The majority of transformers is equipped with devices for change of coefficient of transformation by addition or shutdown of number of part of rounds of a winding.

Depending on a design regulation of tension of the transformer on secondary windings can be made by means of the switch of number of rounds of the transformer or bolted connections by the choice of provision of crossing points or connection of the corresponding conclusion from the corresponding set at the cut off power and grounded transformer. By means of such control devices tension on secondary windings changes in small limits.

Kinds of switches of number of rounds of the transformer:

  1. Switches of number of rounds without loading - the switches without excitement (SWE)
  2. Switches of number of rounds under loading - the regulation under loading (RUL)
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OLZ-1,25/27,5 transformer
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