General specifications
|
|
Parameters
|
TRG-UETM®-35
|
|
1
|
Rated voltage, kV
|
35
|
|
2
|
The largest operating voltage, kV
|
40,5
|
|
3
|
Voltage of industrial frequency withstand by transformer with pressure of insulating gas equal to atmospheric, kV
|
26
|
|
4
|
Nominal frequency, Hz
|
50 or 60
|
|
5
|
Rated primary current, in increments of 5A, A
|
from 5 to 2000
|
|
6
|
Rated secondary current, A
|
from 1 to 5
|
|
7
|
Number of secondary windings
|
from 1 to 4
|
|
8
|
Short-circuit current parameters:
|
|
Largest peak, kA
|
102
|
|
One-second current thermal resistance, kA
|
40
|
|
9
|
Maximum ambient temperature, °С:
|
|
For Т1
|
+50
|
|
For U1, UHL1*, HL1*, HL1
|
+40
|
|
10
|
Minimum ambient temperature according to GOST 15150-69, °С:
|
|
For Т1
|
- 10
|
|
For U1
|
- 45
|
|
For UHL1
|
- 60
|
|
11
|
Insulating gas:
|
|
For Т1
|
SF6 or N2
|
|
For U1
|
SF6 or N2
|
|
For UHL1
|
SF6 or N2
|
|
For HL1
|
-
|
|
12
|
Maximum allowable gas leakage,% per year
|
0,2
|
|
13
|
Maximum wind speed, m / s., with an ice wall thickness of up to 20 mm
|
40
|
|
14
|
Wire tension:
|
|
in the horizontal plane along the axis of the transformer, N
|
500
|
|
in the vertical plane down, N
|
500
|
|
15
|
The average weight of the transformer, kg:
|
|
with porcelain insulator
|
190
|
|
with polymer insulator
|
-
|
|
16
|
Average service life of the transformer, years, not less
|
40
|
The current transformer of the TRG series is a structure, in the upper part of which there is a metal case fixed on the supporting insulator. The insulator, in turn, is fixed on the base in which the terminal box of the secondary windings is located. The primary winding and its terminals are fixed in the metal case, the secondary windings are placed inside the case. The internal cavities of the housing and the insulator are filled with insulating gas.
The design of the primary winding allows to obtain different transformation ratios when changing the number of turns by a series-parallel connection of sections of the primary winding. It is possible to manufacture current transformers without switching with one transformation ratio.
The secondary windings are placed in electrostatic screens, in order to level the internal electric field.
The magnetic core of the secondary winding for measurement is made of nanocrystalline alloy, the magnetic core of the secondary winding for protection is made of cold-rolled anisotropic electrical steel.
The gas pressure is controlled using a density detector with temperature compensation. Density detector is equipped with two pairs of contacts, which allows receiving a signal at two gas density (pressure) values and remotely monitoring gas pressure.
If necessary, there is the possibility of sealing the findings of the secondary winding for electricity metering. Sealing is carried out in any convenient way. For this purpose, special places are provided in the design of the transformer. A protective device is located in the upper part of the current transformer, which connects the internal gas volume with the atmosphere when the internal pressure is significantly exceeded (for example, with excessive gas or internal arc overlapping), which makes the device explosion-proof.
Metrological parameters of secondary windings
|
Application
|
Accuracy class according to GOST 7746-2001 and IEC 60044-1-2003, 60044-6-92
|
Nominal secondary load, V ∙ A
|
Instrument safety factor
|
Nominal limit frequency
|
|
Commercial Accounting or Measurement
|
0,2S; 0,5S; 0,2; 0,5; 1; 3; 5
|
Up to 100
|
from 2 to 30
|
|
|
Protection
|
5Р; 10Р; 5PR; 10PR; TPY; TPZ
|
Up to 100
|
|
from 2 to 250
|
