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

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

One-phase distribution transformer OLDescription

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.

Ambient air temperature during operation period should be from minus 60°С up to plus 50°С for "YHL1" version and from minus 10°C up to plus 50°С for "T" version.

Altitude above sea level is not higher than 1000 m.

Creepage distance III as to GOST 9920.

Mounting in vertical position.

The transformer is patented
Patent certificates №№ 2087967, 2087968, 2110862, 2193252 

Table 1. Technical data

Parameter

Normal value

OL-2,5/6

OL-2,5/10

OL-4/6

OL-4/10

Voltage class, kV

6

10

6

10

Maximum working voltage, kV

7,2

12

7,2

12

Rated voltage of primary winding, V

6300

10500

6300

10500

Rated voltage of secondary windings 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

Losses of short circuit, Wt

110

125

Table 2. Dimensions

Transformer type Dimensions, mm Mass, kg, max
H L B1 B B2 B3
OL-2,5/6; OL-2,5/6-1
OL-2,5/10; OL-2,5/10-1
365 358 252±1 360 450 495 60
OL-4/6
OL-4/10
377 376 266±1 374 480 515 73

General view of transformer (drawing)