One-phase distribution transformers OLS (ОЛС) on powers of 2,5 and 4 kVA

One-phase distribution transformers OLS (ОЛС) on powers of 2,5 and 4 kVA

One-phase distribution transformer OLSDescription

The transformers are intended for powering circuits of sectionalization units and units of automatic switch of reserve (AVR), as well as for powering other instrument in electric mains for voltage class 6-10 kV with 50 or 60 Hz frequency.

Transformers are manufactured in climatic versions "YHL" (temperate outside mounting) or "T" (tropical) according to the standard requirements of GOST 15150 location category 1 and are intended for usage in factory-assembled switchgears.

Ambient air temperature during operation period should be from minus 60°С up to plus 50°С for "YHL2" version and from minus 10°C up to plus 50°С for "T2" version.

Altitude above sea level is not higher than 1000 m.

Mounting in any position.

The transformers are patented
Patent certificates №№ 2087967, 2087968, 2193252 

Table 1. Technical data

Parameter

Normal value

OLS-2,5/6

OLS-2,5/10

OLS-4/6

OLS-4/10

Voltage class, kV

6

10

6

10

Maximum operating voltage, kV

7,2

12

7,2

12

Rated voltage of primary winding, V

6300

10500

6300

10500

Rated voltage of secondary winding on tappings, V:

 

х-а1

218

х-а2

224

х-а3

230

х-а4

236

х-а5

242

Rated frequency, Hz

50

Rated power, kVA

2,5

4

Vector group of transformer

1/1-0

No-load current, %

35

Losses at no-load current, Wt, no more

60

70

Short circuit voltage, %

5

Short circuit losses, Wt, no more

110

125

Table 2. Dimensions

Transformer type Dimensions, mm Mass, kg, max
H L L1 B B1
OLS-2,5/6
OLS-2,5/10
280 327 300±1 341 252±1 56
OLS-4/6
OLS-4/10
298 351 318±1 355 266±1 70

General view of transformer (drawing)