One-phase distribution transformers OLS (ОЛС) on powers of 0,63 and 1,25 kVA

One-phase distribution transformers OLS (ОЛС) on powers of 0,63 and 1,25 kVA

One-phase distribution transformer OLSDescription

The transformer is intended for powering auxiliary circuits of the sectioning points and automatic reserve switching (ARS) of the electric networks for 6 - 10 kV.

The transformer is manufactured in compliance with requirements of GOST 15150 designers version "У" (moderate) and "T"(tropical) to location category 2 and is intended for embedding in factory assembled switchgears of the outside mounting at the following operating conditions:

  • ambient air temperature at operation is from minus 45 to plus 50 °C for "У2" version and from minus 10 to plus 50 °C for "T2" version;
  • the upper value air humidity is 100% at 25 °C for "У2" version and 100% at 35 °C for "T2" version;
  • mounting in any position.

The transformer is patented
Patent Certificates No 6266, 6267. 

Table 1. Technical data

Parameter

Normal values

OLS-0,63/6

OLS-0,63/10

OLS-1,25/6

OLS-1,25/10

Voltage class, kV

6

10

6

10

Maximum operating voltage, kV

7,2

12

7,2

12

Rated voltage of the primary winding , kV

6,3

10,5

6,3

10,5

Rated voltage of the secondary winding*, W:
a1 - x
a2 - x
a3 - x
a4 - x

100

209

220

231

Rated burden at the rated voltages 100 and 220V, VA

630

1250

Maximum power within 10 min. on the tapings 220 V, VA:

2000

Rated frequency, Hz

50 or 60

Vector group of transformer

1/1-0

Test voltage, Hz

.

one-minute of industrial frequency

25

35

25

35

of full lighting impulse

60

75

60

75

of cut lighting impulse

70

90

70

 90

Masst, kg

26,5±1,5

28,5±1,5

28±1,5

30±1,5

D, mm

188±3

212±3

*Tolerance of the voltage on the tapping 100V - ±3%, on the other tappings - ±1%. 

General view of transformer (drawing)