Grounded voltage transformers ZNOL.06 (ЗНОЛ.06)

Grounded voltage transformers ZNOL.06 (ЗНОЛ.06)

Grounded voltage transformer ZNOL.06Description

The transformers are intended for embedding in factory-assembled switchgears of inside placement and closed switchgears (KRU), as well as turbogenerator conductions, and are used for powering measurement, automated, signaling and protection circuits in alternate current electrical devices of 50 or 60 Hz frequency in networks with isolated neutral.
Transformers of both types are allowed to be used at temperatures up to 65°C given the burden does not exceed accuracy class 0,5 rated power.

Grounded voltage transformer ZNOL.06 on 27 and 35 kVTransformers are manufactured in climatic versions "У" (moderate) and "T" (tropical) according to the standard requirements of GOST 15150 allocation category 3. and are intended for usage under the following operating conditions:

  • altitude above sea level is not higher than 1000 m;
  • ambient air temperature, considering the overheating inside conduction or switchgear at the maximum burden of the transformers:
    • - for "УЗ" version from minus 45 °C up to plus 50 °C;
    • - for "TЗ" version from minus 10 °C up to plus 55 °C;
  • environment should be non-explosive, without corrosive gases and steams in proportions that are likely to destroy metal and insulation;
  • mounting in any position.

The transformer is patented
Patent certificates № 6268 and 10815
Patent Publication № 2193252 

Table 1. Technical data

Parameter

Value

ZNOL.06-3

ZNOL.06-6

ZNOL.06-10

ZNOL.06-15

ZNOL.06M-15

ZNOL.06-20

ZNOL.06M-20

Voltage class, kV

3

6

10

15

20

Maximum operating voltage, kV

3,6

7,2

12

17,5

24

Rated voltage of primary winding, V

3000/√3
3300/√3

6000/√3
6300/√3
6600/√3
6900/√3

10000/√3
10500/√3
11000/√3

13800/√3
15750/√3

18000/√3
20000/√3

Rated voltage of main secondary winding, V

100/√3
or
110/√3

100/√3

100/√3
or
110/√3

100/√3

Rated voltage of additional secondary winding, V

100/3 or 100 or
110/3* or
110* or 100/√3****

100/3
100

100/3 or
100 or
110/3* or
110*

100/3
100

Rated burden of main secondary winding** at power factor of active-inductive load equal to 0,8 in given accuracy classes according to GOST 1983, VA:

0,2
0,5
1
3








15
30
50
150








30
50
75
200








50
75
150
300








25
50
75
200








50
75
150
300








25
50
75
200

Rated burden of additional secondary winding at power factor of active-inductive load equal to 0,8 in accuracy class 3 according to GOST 1983, VA:

150

200

300

200

300

200

Maximum burden out of accuracy class, VA

250

400

630

400

630

400

Maximum allowed continuous primary current, A

0,14

0,11

0,10

0,07

0,05

0,06

0,04

Climatic version and location category

У3 or Т3

Vector group of transformer

1/1/1-0-0

AC current frequency, Hz

50 or 60

Continuation of table

Parameter

Value

ZNOL.06-24

ZNOL.06M-24

ZNOL.06-27

ZNOL.06-35

Voltage class, kV

24

27

35

Maximum operating voltage, kV

26,5

30

40,5

Rated voltage of primary winding, V

24000/√3

27000/√3

27500

35000/√3

Rated voltage of main secondary winding, V

100/√3
or
110/√3

100/√3

100/√3
or
110/√3

100

100/√3

Rated voltage of additional secondary winding, V

100/3 or
100 or
110/3* or
110*

100/3
or
100

100/3 or
100 or
110/3* or
110*

127

100/3

Rated burden of main secondary winding** at power factor of active-inductive load equal to 0,8 in given accuracy classes according to GOST 1983, VA:

0,2
0,5
1
3





50
75
150
300





30
50
75
200





50
75
150
300





20
60
120
-

Rated burden of additional secondary winding at power factor of active-inductive load equal to 0,8 in accuracy class 3 according to GOST 1983, VA

300

200

300

100

Maximum burden out of accuracy class, VA

630

400

630

600

Maximum allowed continuous primary current, A

0,05

0,03

0,04

0,022

0,03

Climatic version and location category

У3 or Т3

УХЛ2.1 or Т2.1

Vector group of transformer

1/1/1-0-0

AC current frequency, Hz

50 or 60

Notes:

* Is used as second main secondary winding  (for powering of measuringinstruments). Burden on both secondary windings as well as their accuracy classes should be specified in the order.

Table 2. Technical data of ZNOL.06.4 (3 secondary windings)

Parameter

Value

ZNOL.06.4-6

ZNOL.06.4-10

ZNOL.06.4-20

ZNOL.06.4-35

ZNOL.4-35 III

Voltage class, kV

6

10

20

35

Maximum operating voltage, kV

7,2

12

24

40,5

Rated voltage of primary winding, V

6000/√3

10000/√3

20000/√3

35000/√3

Rated voltage of first main secondary winding, V

100/√3

Rated voltage of second main secondary winding, V

100/√3

Rated voltage of additional secondary winding, V

100/3

100

100/3

100

100/3

100

100/3

Rated burden of first main secondary winding at power factor of active-inductive load equal to 0,8 in accuracy class 0.2 according to GOST 1983, VA

10

Rated burden of second main secondary winding at power factor of active-inductive load equal to 0,8 in accuracy class 0.5 according to GOST 1983, VA

25

15

30

15

30

15

30

Rated burden of additional secondary winding at power factor of active-inductive load equal to 0,8 in accuracy class 3 according to GOST 1983, VA

200

50

200

50

200

50

200

Maximum burden out of accuracy class, VA

400

160

400

160

400

160

400

Maximum allowed continuous primary current, A

0,12

0,05

0,07

0,03

0,04

0,02

 

Climatic version and location category

У3 или Т3

УХЛ2.1 или Т2.1

УХЛ1 или Т1

Vector group of transformer

1/1/1-0-0-0

AC current frequency, Hz

50 or 60

Notes:
1 First main secondary winding is used for commercial metering, second main winding is intended for technical metering, additional secondary winding is intended for control of network's insulation  (100/3 V).
2 Transformer stays in accuracy class in either case when separate or all secondary winding are loaded with rated burdens.
We may consider manufacturing of tarnsformers with other values of technical parameters, which should be discussed on order.

Table 3.Dimensions

Transformer type

Dimensions, mm

Mass, kg

H1

H2

L1

L2

D

ZNOL.06-3

ZNOL.06-6

ZNOL.06.4-6

298±5

287+5-3

328+5-3

153±2

160±3

26,5±1,5

ZNOL.06-10*

ZNOL.06.4-10

ZNOL.06M-15

175±3

28,5±1,5

ZNOL.06-15

ZNOL.06M-20

214±5

303+5-3

195±3

29,5±1,5

ZNOL.06-20

ZNOL.06.4-20

ZNOL.06M-24

341±5

330+5-3

205±3

32,5±1,5

ZNOL.06-24

348±5

337+5-3

338+5-3

163±2

240±3

40,5±1,5

*Transformers with rated primary voltage of  11000/√3V for nuclear power plants are manufactured indimensions of transformer ZNOL.06-15

General view of transformers ZNOL.06-3(-24) and ZNOL.06.4-6(-20) and ZNOL.06M-15(-24) (drawing)

General view of transformers ZNOL.06-27(-35) and ZNOL.06.4-35 (drawing)