Indoor current tarnsformers support and bushing type ТЛ-10-M (TL-10-M)

Indoor current tarnsformers  support and bushing type ТЛ-10-M (TL-10-M)

Description

The transformers are intended for transmitting measuring information signal to measuring instruments and/or to protection, automatic control and signaling devices, as well as for insulation of secondary connection circuits from the high voltage in alternate current electric appliances for voltage class 11 kV with the frequency of 50 and 60 Hz. The transformers for differential protection are manufactured at the special order. The transformers are designed for embedding in factory-assembled switchgears.
The transformers are manufactured in climatic versions "У" (moderate) and "T" (tropical) according to the standard requirements of GOST 15150 location category 3 and are intended for usage under the following operating conditions:

  • the altitude above sea level is not higher than 1000m;
  • maximum ambient air temperature, considering the overheating inside KRU compartment: plus 55 °C for "У" version and plus 60 °C for "T" version;
  • minimum ambient air temperature is minus 45 °C for "У" version;
  • the environment should be non-explosive, without corrosive steams in concentrations that are likely to destroy metal or insulation (atmosphere type II as to GOST 15150);
  • mounting in any position.

Transformers are supplied with protective transparent covers for separate sealing of secondary winding's tappings (example of sealing) 

Table 1. Technical data

Parameter Values for corresponding types
М-2-I-1
М-3-I-1
М-2-I-2
М-3-I-2
М-3-I-3 М-4-I-2 М-2-II-1 М-2-II-2 М-2-II-3 М-3-II-3 М-4-II-3
Voltage class, kV 10 or 11
Maximum operating voltage, kV 12
Frequency of alternating current, Hz 50
Primary current, A 5, 10, 15, 20, 30, 4050, 7580, 100, 150, 200 5, 10, 15, 20, 30, 4050, 7580, 100, 150, 200, 300, 400, 600, 750, 800, 1000, 1500 300 600, 750, 800, 1000, 1500 10, 15, 20, 30, 40, 50, 75, 80, 150 10, 15, 20, 30, 40, 50, 75, 80, 150 300, 400, 600, 750, 800, 1000, 1500, 2000 400, 600, 750, 800, 1000, 1500, 2000 600, 750, 800, 1000, 1500, 2000
Secondary current, A 5
Number of secondary windings 2, 3 3 4 2 3 4
Accuracy class:
- of secondary winding for measurement
- of secondary winding for protection



0, 2S; 0, 2; 0, 5S; 0, 5
5Р; 10Р

Burden, VA, of secondary windings:
- for measurement at cos φ = 1
- for measurement at cos φ = 0,8
- for protection at cos φ = 0,8


1; 2; 2, 5
3; 5; 10; 15; 20; 25; 30; 50 (10)*
3; 5; 10; 15; 20; 25; 30; 50 (15)*
Short-circuit current ratio of secondary winding for protection from 2 up to 30 (10)*
Instrument security factor of secondary winding for measurement in accuracy class:
0, 2S; 0, 2; 0, 5S
0, 5


from 2 up to 30 (10)*
from 2 up to 30 (15)*
Diameter of primary winding's contact, mm 24 36 55 36 24 36 55

Continuation of table 1

Parameter Value of corresponding type
М-2-I-1
М-3-I-1
М-2-I-2
М-3-I-2
М-3-I-3 М-4-I-2 М-2-II-1 М-2-II-2 М-2-II-3 М-3-II-3 М-4-II-3
Thermal current, kA, at given primary current, A:  
5 0,4 0,4 - - - - - - -
10 0,78 0,78 2,5 2,5
15 1,2 1,2 2,5 2,5
20 1,56 1,56 2,5 2,5
30 2,5 2,5 5 5
40 3 3 5 5
50 5 5 10 10
75 5,85 5,85 10 10
80 6,23 6,23 10 10
100 10 10 20 20
150 12,5 12,5 20 20
200 20 20 - -
300 - 31,5 31,5 40
400 - 40
600-1500 31,5 40
2000 - -
Dynamic current, kA, at given primary current, A:  
5 1 1 - - - - - - -
10 1,97 1,97 6,25 6,25
15 3 3 6,25 6,25
20 3,93 3,93 6,25 6,25
30 6,25 6,25 12,8 12,8
40 7,56 7,56 12,8 12,8
50 12,8 12,8 25,5 25,5
75 14,7 14,7 25,5 25,5
80 15,7 15,7 25,5 25,5
100 25,5 25,5 51 51
150 31,8 31,8 51 51
200 51 51 - -
300 - 81 81 102
400 - 102
600 - 1500 81 102
2000 - -

     * Default values of burden, maximum multiplicity and safety factor are shown in brackets.

Table 2. Dimensions

Transformer type

Primary current, A

Pic.

Dimensions, mm

Weight, max, kg

B

D

L

L1

H

TL-10M-4-I-2

TL-10M-4-II-2

5-400

1

40

36

84

27.5

27

31

600-1000

40

95

33

34

1200; 1500

60

40

TL-10M-4-II-3

300, 400

40

55

84

27.5

27

600-1000

40

95

33

34

1200-2000

60

40

TL-10M-2-I-1

5-15

2

40

24

84

27,5

27

29

20-200

35

TL-10M-2-II-1

30-150

40

TL-10M-2-II-2

30-200

40

36

TL-10M-2-I-2

5-15

40

20-200

35

300-1000

40

95

33

34

1200; 1500

60

40

TL-10M-2-II-3

300-1000

40

55

34

1200-2000

60

40

TL-10M-3-I-1

5-15

3

40

24

84

27,5

27

20-200

35

TL-10M-3-I-2

5-15

40

36

20-200

35

300-1000

40

95

33

34

1200; 1500

60

40

31

TL-10M-3-II-3

300-1000

40

55

34

29

1200-2000

60

40

31

General view of transformers (drawing)