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high overload distribution transformer

1. product introduction
the technology of high overload distribution transformer is mainly aimed at the situation that the rural distribution transformer is in light load operation state for most of the year, with low annual average load rate, but it is used in concentrated load period, the rural power load in spring festival increases rapidly, which causes serious overload or even burning of the transformer in short period, solves the problem of safe and stable power supply in rural spring festival and busy period, and ensures the safety and stability of power supply in rural areas the operation of rural distribution transformer is economical, and the capacity of general products is small.

2. product features

◆ high overload capacity
based on the load characteristics of rural power grid and the requirements of normal temperature rise test, the high overload distribution and transformation shall meet the continuous operation of 1.5 times of rated capacity for 6h (3h in load rise and fall phases), 1.75 times of rated capacity for 3h (1.5h in load rise and fall phases), 2.0 times of rated capacity for 1h, and shall not affect the normal service life of transformer; the temperature rise of high overload distribution and transformation shall meet the requirements of class b and above edge limit.
◆ energy saving and environmental protection
according to the operation characteristics of high overload transformer, it can not only meet the short-term overload operation, but also avoid the situation of large horse pulling small car in low load operation. high burn point vegetable oil is generally used in high overload transformer to avoid environmental pollution caused by oil leakage.

3. main technical parameters

 

 

high overload transformer

model

rated capacity (kva)

voltage combination

group label

no-load loss (w)

load loss (w)

no-load current(%)

short-circuit impedance(%)

high

(kv)

low

(kv)

s11-m(f)

50

10

10.5

11

0.4

dyn11 or yyn0

130

910/870

1

4

100

200

1580/1500

0.9

200

340

2730/2600

0.8

s13-m(f)

160

100

910/870

0.5

200

150

1580/1500

0.45

250

240

2730/2600

0.4

sh15-m(f)

315

43

910/870

1.2

400

75

1580/1500

0.9

500

120

2730/2600

0.6

 


4. overall dimensions

 

n/a



 

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